package OOPS;
our $VERSION = 0.2005;
our $SCHEMA_VERSION = 1005;
require 5.008002;
require Exporter;
@EXPORT = qw(transaction getref walk_hash);
@ISA = qw(Exporter);
@EXPORT_OK = qw(transaction $transaction_maxtries $transfailrx dbiconnect dboconnect workaround27555 walk_hash);
use DBI;
use strict;
use warnings;
#use diagnostics;
use Carp qw(confess longmess verbose croak longmess);
use Scalar::Util qw(refaddr reftype blessed weaken);
use Hash::Util qw(lock_keys);
use B qw(svref_2object);
require OOPS::DBO;
#
# This is a self source filter.
#
BEGIN {
package OOPS::SelfFilter;
sub filter
{
my $more = filter_read();
$_ = "#\n" if /debug/ || (/assertions/ && /oops/);
return $more;
}
use Filter::Util::Call ;
filter_add(bless [], __PACKAGE__)
unless $OOPS::SelfFilter::defeat;
}
our $bigcutoff = 255;
our $cksumlength = 28;
our $demandthreshold = 500;
our $oopses = 0;
my $nopkey = 'nopkey';
our $warnings = 1;
our $transaction_tries = 0;
our $transaction_maxtries = 15;
our $transaction_failure_sleep = 0.5;
our $transaction_failure_maxsleep = 10;
our @transaction_rollback;
our $dbi_bug_workaround_count_debug = 0;
our $gc_overflow_id = 4;
# This gets updated by OOPS::DBO as backends are used
our $transfailrx = qr/^wont^match^anything^yet/;
our $id_alloc_size = 10;
my %typesymbol = (
HASH => '%',
ARRAY => '@',
SCALAR => '$',
REF => '$',
GLOB => '*',
CODE => '&',
H => '%',
A => '@',
S => '$',
);
my %perltype2otype = (
HASH => 'H',
ARRAY => 'A',
SCALAR => 'S',
REF => 'S',
);
our $debug_free_tied = 0;
our $debug_tiedvars = 0; # produces no output -- just verification
our $debug_oops_instances = 0; # track allocation / destructions of OOPS objects
our $debug_load_object = 0; # basic loading of objects
our $debug_load_values = 0; # loading of all keys & values
our $debug_load_context = 0; # stack trace for each load
our $debug_load_group = 0; # touches: load groups
our $debug_arraylen = 0; # touches: arraylen hash
our $debug_tie = 0; # when tie'ing
our $debug_untie = 0;
our $debug_writes = 0;
our $debug_write_object = 0; # write to the object table
our $debug_blessing = 0; # bless operations
our $debug_memory = 0; # touches: memory
our $debug_memory2 = 0; # the memory set/clear routines
our $debug_cache = 0; # touches: cache
our $debug_oldobject = 0; # touches: oldobject
our $debug_refcount = 0; # touches: refmore, refless or refcount
our $debug_gcgeneration = 0; # touches: gc generation
our $debug_touched = 0; # touches: touched
our $debug_commit = 0; # save objects
our $debug_demand_iterator = 0;
our $debug_forcesave = 0;
our $debug_isvirtual = 0;
our $debug_27555 = 0; # touches: 27555 fixup code
our $debug_27555_context = 0; # 27555 fixup code calling context
our $debug_save_attributes = 0; # near: queries to save pval
our $debug_save_attr_arraylen = 0; # arraylen for attribute save
our $debug_save_attr_context = 0; # stack trace for each attribute save
our $debug_refarray = 0; # array elements as references
our $debug_refalias = 0; # references to other values inside objects
our $debug_refobject = 0; # references to other objects
our $debug_reftarget = 0; # regarding reference target tracking
our $debug_write_object_context = 0; # traceback in write_object()
our $debug_write_ref = 0;
our $debug_write_array = 0; # has ARRAY changed?
our $debug_normalarray = 0; # tied callbacks: non-virtual hash
our $debug_normalhash = 0;
our $debug_write_hash = 0;
our $debug_virtual_delete = 0;
our $debug_virtual_save = 0;
our $debug_virtual_hash = 0; # tied callbacks: virtual hash
our $debug_virtual_ovals = 0; # original values of virtual has
our $debug_hashscalar = 0; # scalar(%tied_hash)
our $debug_object_id = 0; # details of id allocation
our $debug_getobid_context = 0; # stack trace for new objects
our $debug_dbidelay = 0; # add small delay before changing transaction mode
our $debug_dbi = 0; # DBI debug level: 0 or 1 or 2
our @debug_traceintercept = qw(); # Debug::TraceIntercept
our $debug_upgrade = 0; # debug schema upgrades
our $debug_initialize = 0; # debug initial queries
our $debug_setup = 0; # debug database initialization
our $debug_bigstuff = 0; # debug overflow table operations
our $debug_dbd = 0; # debug mysql.pm, pg.pm, etc.
our $debug_queries = 0; # bitfield: 1=select all (vs default==regex match), 2=print query name, 4=print query, 8=print args, 16=varients, 32=full query log
our $debug_q_regex_target = 'query'; # query regex match on 'comment', 'query', or 'data'
our $debug_q_regex = qr/insert/i; # query regex matches comment or query
our $debug_tdelay = 400; # maximum artifical wait time (milliseconds)
select(STDOUT); $| = 1; # debug
# debug set for ref.t
$debug_27555 = $debug_write_ref = $debug_load_object = $debug_load_values = $debug_memory = $debug_commit = $debug_refalias = $debug_write_ref = 1 if 0;
my $global_destruction = 0;
our %tiedvars;
tie my %qtype, 'OOPS::debug', sub { return reftype($_[0]) };
tie my %qref, 'OOPS::debug', sub { return ref($_[0]) };
tie my %qaddr, 'OOPS::debug', sub { return refaddr($_[0]) };
tie my %qnone, 'OOPS::debug', sub { $_[0] };
tie my %qmakeref, 'OOPS::debug', sub { \$_[0] };
tie my %qval, 'OOPS::debug', sub { return defined $_[0] ? (ref($_[0]) ? "$_[0] \@ $qaddr{$_[0]}" : "'$_[0]'") : 'undef' };
tie my %qplusminus, 'OOPS::debug', sub { $_[0] >= 0 ? "+$_[0]" : $_[0] };
tie my %caller, 'OOPS::debug', sub { my $lvls = $_[0]+1; my ($p,$f,$l) = caller($lvls); my $s = (caller($lvls+1))[3]; $s =~ s/OOPS:://; $l = $f eq __FILE__ ? $l : "$f:$l"; return "$s/$l" };
tie my %qmemval, 'OOPS::debug', sub { my $v = shift; return "*$v" unless ref $v; return "*$v->[0]/$qval{$v->[1]}" };
tie my %qsym, 'OOPS::debug', sub { return $typesymbol{reftype(shift)} };
sub OOPS::debug::TIEHASH { my $p = shift; return bless shift, $p }
sub OOPS::debug::FETCH { my $f = shift; return &$f(shift) }
require Debug::TraceIntercept if @debug_traceintercept;
for my $dti_debug (@debug_traceintercept) {
Debug::TraceIntercept::trace($dti_debug);
} # debug
sub new
{
my ($pkg, %args) = @_;
my $oops = bless {
otype => {}, # object id -> H(ash)/A(rray)/S(scalar or ref)
loadgroup => {}, # object id -> object loadgroup #
loadgrouplock => {}, # object id -> object id
groupset => {}, # group id -> object id -> 1
cache => {}, # object id -> actual object
memory => {}, # ref memory location -> object id
memory2key => {}, # ref mem location -> [ object id, object key ]
new_memory => {}, # ref memory location -> object id
new_memory2key => {}, # ref mem location -> [ object id, object key ]
memrefs => {}, # ref mem location -> ref
memcount => {}, # ref mem location -> count of active references
memsetdebug => {}, # where mem->object mappings were made
deleted => {}, # object id -> has been deleted
unwatched => {}, # object id -> must check at save
virtual => {}, # object id -> is it virtual? yes=V, no=' '
arraylen => {}, # object id -> integer; array length
reftarg => {}, # object id -> boolean: '0' || 'T'; Indicates if there are references to elements of this object
aliasdest => {}, # object id -> hash of objectids that reference id
oldvalue => {}, # object id & pkey -> original pval
oldobject => {}, # object id & pkey -> original object id reference
oldbig => {}, # object id & pkey -> checksum
objtouched => {}, # objedt id -> bit - object may need saving
demandwritten => {}, # object id -> tie control object
demandwrite => {}, # object id -> write this one via tied.
gcgeneration => {}, # object id -> garbage collection generation
refdebug => {}, # object id -> original reference count
objverdebug => {}, # object id -> object version counter
refcount => {}, # object id -> reference count
refmore => {}, # object id -> change in reference count (during commit()) - also serves as a todo list for saving objects
refless => {}, # object id -> change in reference count (during commit()) - also serves as a todo list for saving objects
forcesave => {}, # object id -> bit - for object row to be re-written XXX redesign
vcache => [], # objects that implement a CLEAR_CACHE() method
do_forcesave => 0, # always update object row when attributes change, varies per backend
savedone => {}, # during commit() - object written?
refstowrite => [], # during commit() - list of reference objects to save
insave => 0, # are we currently save()ing things?
loaded => 0, # number of objects "in memory"
tountie => {}, # scalars wishing to be untied
class => {}, # my original class/blessing
queries => {}, # text of queries - original text
binary_q_list => {}, # list of binary parametes to queries - DBD::Pg only
debug_q => {}, # query comments, debugging pragmas
commitdone => 0, # have we already done a commit()?
refcopy => {}, # object id & pkey -> ref to orig pval
aliascount => {}, # object id & pkey -> count of \aliases
oldalias => {}, # object id -> [ object id, pkey ]
disassociated => {}, # object id & pkey && refs => other disconnected ref
virtualize => {}, # objects to (un)virtualize
gcspillcount => 0, # number of objects spilled to the gc re-do buffer
args => \%args, # creation arguments
readonly => $args{readonly}, # commit not allowed?
}, $pkg;
print "# CREATE $$'s OOPS $oops\n" if $debug_oops_instances;
my $dbo = $oops->{dbo} = OOPS->dboconnect(%args);
$dbo->rebless($oops);
#print "BLESSED $oops at ".__LINE__."\n" if $debug_blessing;
#
# object.otype:
#
# H HASH
# A ARRAY
# S SCALAR/REF
#
# object.virtual:
#
# 0 default
# V load virtual
#
# attribute.ptype:
#
# 0 normal
# R reference to an OBJECT
# B Big scalar
#
#
$dbo->learn_queries($dbo->initial_query_set);
$dbo->learn_queries(<<END);
saveobject: 3
INSERT INTO TP_object (id, loadgroup, class, otype, virtual, reftarg, rfe, alen, refs, counter, gcgeneration)
VALUES (?, ?, ?, ?, ?, ?, '0', ?, ?, 1, ?)
updateobject: 2
UPDATE TP_object
SET loadgroup = ?, class = ?, otype = ?, virtual = ?, reftarg = ?, alen = ?, refs = ?, gcgeneration = ?, counter = (counter + 1) % 65536
WHERE id = ?
objectset:
SELECT o.* FROM TP_object AS o, TP_object AS og
WHERE og.id = ? AND og.loadgroup = o.loadgroup
objectinfo:
# this has to be * so that it will work on all versions of the schema
# SELECT loadgroup,class,otype,virtual,reftarg,alen,refs,counter,gcgeneration FROM TP_object
SELECT * FROM TP_object
WHERE id = ?
objectgroupload:
SELECT a.* FROM TP_attribute AS a, TP_object AS g
WHERE g.loadgroup = ? AND g.id = a.id
objectload:
SELECT pkey, pval, ptype FROM TP_attribute
WHERE id = ?
objectreflist:
SELECT pval FROM TP_attribute
WHERE id = ? AND ptype = 'R'
reftargobject: 1
SELECT TP_object.id FROM TP_object, TP_attribute
WHERE TP_attribute.pkey = ?
AND TP_object.id = TP_attribute.id
AND TP_object.otype = 'S'
reftargkey: 1 2
SELECT TP_object.id FROM TP_object, TP_attribute
WHERE TP_attribute.pkey = ?
AND TP_attribute.pval = ?
AND TP_object.id = TP_attribute.id
AND TP_object.otype = 'S'
saveattribute: 2 3
INSERT INTO TP_attribute
VALUES (?, ?, ?, ?)
loadpkey: 2
SELECT pval, ptype FROM TP_attribute
WHERE id = ? AND pkey = ?
deleteattribute: 2
DELETE FROM TP_attribute
WHERE id = ? AND pkey = ?
savepkey: 2 4 6 7 # show
DELETE FROM TP_attribute
WHERE id = ? AND pkey = ?;
DELETE FROM TP_big
WHERE id = ? AND pkey = ?;
INSERT INTO TP_attribute
VALUES (?, ?, ?, ?);
updateattribute: 1 4
UPDATE TP_attribute
SET pval = ?, ptype = ?
WHERE id = ? AND pkey = ?
deletebig: 2 # show
DELETE FROM TP_big
WHERE id = ? AND pkey = ?
predelete1: # show
DELETE FROM TP_big WHERE id = ?
predelete2:
DELETE FROM TP_attribute WHERE id = ? AND ptype != 'R'
postdeleteV:
DELETE FROM TP_attribute
WHERE id = ?;
postdelete1:
DELETE FROM TP_attribute WHERE id = ?
postdelete2:
DELETE FROM TP_object WHERE id = ?
deleterange: 2
DELETE FROM TP_attribute
WHERE id = ? AND pkey >= ?
deleteoverrange: 2 # show
DELETE FROM TP_big
WHERE id = ? AND pkey >= ?
countkeys:
SELECT count(*)
FROM TP_attribute
WHERE id = ?
END
Time::HiRes::sleep(rand($debug_tdelay)/1000) if $debug_tdelay && $debug_dbidelay;
$oops->{do_forcesave} = $dbo->do_forcesave;
eval { $oops->{named_objects} = $oops->load_virtual_object(1) };
if ($@) {
print "Could not load object #1\n" if $debug_setup;
my $e = $@;
require OOPS::Setup;
$oops->load_failure($e) || die $e;
return new($pkg, %args);
}
if ($oops->{arraylen}{1} != $SCHEMA_VERSION) {
my $schema_version = $oops->{arraylen}{1};
die "schema version = '$schema_version'" unless $schema_version =~ /\A\d+\z/;
if ($oops->{args}{auto_upgrade} || $ENV{OOPS_UPGRADE}) {
$dbo->disconnect();
require "OOPS/Upgrade/To$SCHEMA_VERSION.pm";
no strict qw(refs);
&{"OOPS::Upgrade::To${SCHEMA_VERSION}::upgrade"}($schema_version, %{$oops->{args}});
return new($pkg, %args);
} else {
$dbo->disconnect();
require "OOPS/OOPS$schema_version.pm"
|| die "could not find historical version $schema_version: $@";
no strict qw(refs);
return &{"OOPS::OOPS${schema_version}::new"}("OOPS::OOPS$schema_version", %{$oops->{args}});
}
}
$oopses++;
print "CREATE OOPS $oops [$oopses]\n" if $debug_free_tied;
$tiedvars{$oops} = longmess if $debug_tiedvars;
lock_keys(%$oops);
assertions($oops);
return $oops if $args{no_front_end};
return OOPS::FrontEnd->new($oops);
}
sub dbms
{
return OOPS::DBO::dbms(@_);
}
sub dbiconnect
{
return OOPS::DBO::dbiconnect(@_);
}
sub dboconnect
{
return OOPS::DBO::dboconnect(@_);
}
sub errstr
{
my $oops = shift;
return $oops->{dbo}->errstr;
}
sub dbo
{
my $oops = shift;
return $oops->{dbo};
}
sub query
{
my $oops = shift;
return $oops->{dbo}->query(@_);
}
sub initial_setup
{
require OOPS::Setup;
goto &initial_setup_real;
}
sub load_object
{
my ($oops, $objectid) = @_;
confess unless $oops->isa('OOPS'); # XX why?
$objectid = $oops->{named_objects}->{$objectid}
if $objectid == 0;
confess unless $objectid;
confess if ref $objectid;
print Carp::longmess("DEBUG: load_object($objectid) called") if $debug_load_context;
if (exists $oops->{cache}{$objectid}) {
print "*$objectid load_object is cached: $qval{$oops->{cache}{$objectid}}\n" if $debug_load_object || $debug_cache;
return $oops->{cache}{$objectid};
}
print "load_object($objectid) from $caller{0}\n" if $debug_load_object && ! $debug_load_context;
my $objectsetQ = $oops->query('objectset', execute => $objectid);
my $atloadgroup;
my $cache = $oops->{cache};
my $type = $oops->{otype};
my $refcount = $oops->{refcount};
my $oloadgroup = $oops->{loadgroup};
my $oclass = $oops->{class};
my $refcopy = $oops->{refcopy};
my $memory = $oops->{memory};
my $memory2key = $oops->{memory2key};
#print "load_object $objectid. Already cached: ".join(' ',keys %$cache).".\n";
#
# We may bail out of this early if it's a virtual object so we can't
# add anything to $oops->{cache} yet.
#
my %newptype;
my %new;
my ($object, $loadgroup, $class, $otype, $virtual, $reftarg, $arraylen, $references, $ocounter, $gcgen);
while (($object, $loadgroup, $class, $otype, $virtual, $reftarg, undef, $arraylen, $references, $ocounter, $gcgen) = $objectsetQ->fetchrow_array()) {
if (exists $cache->{$object}) {
print "skipping $otype $object $loadgroup $class -- already cached\n" if $debug_load_values || $debug_cache;
next;
}
if ($virtual eq 'V') {
if ($object == $objectid) {
die "internal error: virtual objects should not share load groups" if $atloadgroup;
$objectsetQ->finish();
return $oops->load_virtual_object($objectid);
} else {
die "internal error: virtual objects should not be object loadgroup members";
}
}
die unless $loadgroup;
$atloadgroup = $loadgroup;
$oops->{groupset}{$atloadgroup}{$object} = 1;
$oops->{objverdebug}{$object} = $ocounter;
$oops->{refdebug}{$object} = $references;
$refcount->{$object} = $references;
print "load *$object loadgroup:$loadgroup class:$class otype:$otype refcount:$references virtual:$virtual reftarg:$reftarg arraylen:$arraylen\n" if $debug_load_values || $debug_arraylen || $debug_refcount;
if ($otype eq 'H') {
$new{$object} = {};
$cache->{$object} = {};
print "*$object load_object cache := fresh empty hash: $qval{$cache->{$object}}\n" if $debug_cache;
} elsif ($otype eq 'A') {
$new{$object} = $cache->{$object} = [];
$#{$cache->{$object}} = $arraylen-1;
$oops->{objtouched}{$object} = 'untied array';
print "*$object load_object cache := fresh array: $qval{$cache->{$object}}\n" if $debug_cache;
print "in load_object, *$object is always touched 'cause it's an array\n" if $debug_touched;
} elsif ($otype eq 'S') {
my $x;
$cache->{$object} = \$x;
print "*$object load_object cache := fresh scalar: $qval{$cache->{$object}}\n" if $debug_cache;
} else {
confess;
}
$oops->{arraylen}{$object} = $arraylen;
$oops->{reftarg}{$object} = $reftarg;
$oops->{virtual}{$object} = $virtual;
print "*$object loaded gcgen = $gcgen\n" if $debug_gcgeneration;
$oops->{gcgeneration}{$object} = $gcgen;
$type->{$object} = $otype;
$newptype{$object} = {};
$oloadgroup->{$object} = $loadgroup;
print "in load_object, *$object loadgroup = $loadgroup\n" if $debug_load_group;
$oclass->{$object} = $class;
$oops->{loaded}++;
}
confess "object *$objectid not found in database" unless $cache->{$objectid};
my @references;
my ($id, $pkey, $pval, $ptype);
if ($atloadgroup) {
#
# we are loading the attributes for a whole loadgroup of objects
#
print "load loadgroup: $atloadgroup\n" if $debug_load_values;
my $objectgrouploadQ = $oops->query('objectgroupload', execute => $atloadgroup);
no warnings;
local($objectgrouploadQ->{HandleError}) = undef;
local($objectgrouploadQ->{RaiseError}) = 0;
use warnings;
for (;;) {
while(($id, $pkey, $pval, $ptype) = $objectgrouploadQ->fetchrow_array) {
next unless exists $newptype{$id}; # need something that is set on new objects only
#
# $t is the type of object we're loading
# $ptype is the type of attribute we're loading
#
my $t = $type->{$id};
print "$typesymbol{$t}$id/$pkey = '$pval' (ptype $ptype)\n" if $debug_load_values && defined $pval;
print "$typesymbol{$t}$id/$pkey = undef (ptype $ptype)\n" if $debug_load_values && ! defined $pval;
my $ref;
if ($t eq 'H') {
$new{$id}{$pkey} = $pval;
} elsif ($t eq 'A') {
if ($ptype eq '0') {
$cache->{$id}[$pkey] = $pval;
$oops->{oldvalue}{$id}{$pkey} = $pval;
} elsif ($ptype eq 'R') {
#
# Even if this object is already in memory, tie it so that we
# can track if the linkage is used.
#
$cache->{$id}[$pkey] = undef;
print "TIE *${id}[$pkey] OOPS::ObjectInArray object=*$pval\n" if $debug_tie;
tie $cache->{$id}[$pkey], 'OOPS::ObjectInArray', $id, $pkey, $pval, $oops;
$oops->{oldobject}{$id}{$pkey} = $pval;
print "OLDOBJECT loadobject *$id/$pkey = *$pval (in array)\n" if $debug_oldobject
} elsif ($ptype eq 'B') {
$cache->{$id}[$pkey] = $pval;
print "TIE *${id}[$pkey] OOPS::BigInArray cksum=$pval\n" if $debug_tie;
tie $cache->{$id}[$pkey], 'OOPS::BigInArray', $id, $pkey, $pval, $oops;
$oops->{oldbig}{$id}{$pkey} = $pval;
} else {
confess "ptype = $ptype";
}
$ref = \$cache->{$id}[$pkey];
} elsif ($t eq 'S') {
next if $pkey eq $id; # see write_ref()
if ($pkey eq $nopkey) {
my $x;
$cache->{$id} = \$x;
print "*$object load_object cache := new fresh scalar: $qval{$cache->{$object}}\n" if $debug_cache;
if ($ptype eq 'R') {
print "\$*$id = *$pval -- RefObject\n" if $debug_refalias && defined($pval);
print "TIE \$*$id OOPS::RefObject object=*$pval\n" if $debug_tie;
tie ${$cache->{$id}}, 'OOPS::RefObject', $oops, $id, $pval;
} elsif ($ptype eq 'B') {
print "\$*$id = '$pval...' -- RefBig\n" if $debug_refalias && defined($pval);
print "TIE \$*$id OOPS::RefBig val='$pval'\n" if $debug_tie;
tie ${$cache->{$id}}, 'OOPS::RefBig', $oops, $id, $pval;
} elsif ($ptype eq '0') {
$oops->{objtouched}{$id} = 'untied reference';
$oops->{oldvalue}{$id}{$nopkey} = $pval;
$x = $pval;
print "\$*$id = '$pval' -- no tie at all\n" if $debug_refalias && defined($pval);
print "\$*$id = undef -- no tie at all\n" if $debug_refalias && ! defined($pval);
} else {
confess;
}
# } elsif (exists $cache->{$pkey}
# && ! exists $new{$pkey}
# && defined $pval
# && reftype($cache->{$pkey}) eq 'HASH'
# && (my $tied = tied(%{$cache->{$pkey}})))
# {
# #
# # A reference to a tied has that's already loaded.
# # we need to fast-path this because we might be being called
# # during a hash's SAVE_SELF() and the hash key may already
# # be deleted.
# #
# $cache->{$id} = $tied->GETREFORIG($pval);
# $oops->{oldalias}{$id} = [ $pkey, $pval ];
# $oops->{aliasdest}{$pkey}{$id} = $pval;
# $oops->{unwatched}{$id} = 1;
# print "\$*$id load_object cache = untied reference to *$pkey/'$pval' ($qval{$cache->{$id}})\n" if $debug_refalias || $debug_cache;
} else {
print "\$*$id = '$pval' -- RefAlias to $pkey/'$pval'\n" if $debug_refalias && defined($pval);
print "TIE \$*$id OOPS::RefAlias target=*$pkey/'$pval' ($qval{$cache->{$id}})\n" if $debug_tie;
tie $cache->{$id}, 'OOPS::RefAlias', $oops, $id, $pkey, $pval;
$oops->{aliasdest}{$pkey}{$id} = $pval;
}
} else {
confess;
}
#
#
#
$newptype{$id}{$pkey} = $ptype
if $ptype;
if ($ref) {
$refcopy->{$id}{$pkey} = $ref;
my $m = refaddr($ref);
print "MEMORY2KEY $m := *$id/'$pkey' in load_object\n" if $debug_memory;
$oops->memory2key($ref, $id, $pkey);
}
}
if ($objectgrouploadQ->err) {
if ($objectgrouploadQ->errstr() =~ /fetch\(\) without execute\(\)/) {
warn "working around DBI bug"; # debug
$objectgrouploadQ->execute($atloadgroup) || confess $objectgrouploadQ->errstr;
$dbi_bug_workaround_count_debug++;
next;
} else {
confess "fetch_array error ".$objectgrouploadQ->errstr;
}
}
last;
}
# $objectgrouploadQ->finish();
} else {
confess "no loadgroup!";
}
my @cblist;
my @reflist;
for my $id (keys %newptype) {
# unless ($typesymbol{$oclass->{$id}}) {
#print "WILL BLESS $id as $oclass->{$id}\n";
# bless $cache->{$id}, $oclass->{$id};
# print "*$id load_object BLESS $qval{$cache->{$id}} at ".__LINE__."\n" if $debug_blessing || $debug_cache;
# }
# print "$typesymbol{$type->{$id}}$id is $oclass->{$id}\n" if $debug_load_values;
confess if $oclass->{$id} eq 'OOPS';
if ($type->{$id} eq 'H') {
print "\%$id loaded - $qval{$cache->{$id}}\n" if $debug_load_object;
# tied hashes cannot access the underlying variable during callbacks
print "TIE %$id OOPS::NormalHash\n" if $debug_tie;
my $tied = tie %{$cache->{$id}}, 'OOPS::NormalHash', $new{$id}, $newptype{$id}, $oops, $id;
$oops->memory($tied, $id);
print "MEMORY(TIED) ".refaddr($tied)." := *$id' - tied hash, in load_object\n" if $debug_memory;
$oops->memory($cache->{$id}, $id);
print "MEMORY $qaddr{$cache->{$id}} := *$id - hash, in load_object\n" if $debug_memory;
} elsif ($type->{$id} eq 'A') {
print "\@$id loaded - $qval{$cache->{$id}}\n" if $debug_load_object;
# tied arrays are buggy so we're not using them.
$oops->memory($cache->{$id}, $id);
print "MEMORY $qval{$cache->{$id}} := *$id - array, in load_object\n" if $debug_memory;
} elsif ($type->{$id} eq 'S') {
#
# Do these later so that when you FETCH a RefAlias you don't deadlock. Does
# this really solve the problem? What about references to references?
#
push(@reflist, $id);
} else {
confess;
}
print "in load_object, $typesymbol{$type->{$id}} *$id loaded, refcount (=$refcount->{$id})\n" if $debug_refcount;
# push(@cblist, $id)
# if ! $typesymbol{$oclass->{$id}}
# && $cache->{$id}->can('postload');
}
for my $id (@reflist) {
my $a = refaddr($cache->{$id});
if (exists $memory->{$a}) {
if ($memory->{$a} > $id) {
$oops->memory2key($cache->{$id}, $id, $nopkey);
$oops->memory($cache->{$id}, $id);
print "MEMORY $a := *$id - NEW LEAD REF, in load_object\n" if $debug_memory;
print "MEMORY2KEY $a := *$id - joining refs, in load_object\n" if $debug_memory;
} elsif (defined $memory2key->{$a}) {
print "MEMORY2KEY $a already exists... *$memory2key->{$a}\n" if $debug_memory;
} else {
$oops->memory2key($cache->{$id}, $memory->{$a}, $nopkey);
print "MEMORY2KEY $a := *$id - REFS NOW JOINED, in load_object\n" if $debug_memory;
}
} else {
$oops->memory($cache->{$id}, $id);
print "MEMORY $qval{$cache->{$id}} := *$id - ref, in load_object\n" if $debug_memory;
}
# $memory->{refaddr(\$cache->{$a})} = $id;
# print "MEMORY $qval{\$cache->{$a}} := *$id REF to CACHE\n" if $debug_memory;
}
for my $id (keys %newptype) {
unless ($typesymbol{$oclass->{$id}}) {
bless $cache->{$id}, $oclass->{$id};
print "*$id load_object BLESS $qval{$cache->{$id}} at ".__LINE__."\n" if $debug_blessing || $debug_cache;
}
print "$typesymbol{$type->{$id}}$id is $oclass->{$id}\n" if $debug_load_values;
push(@cblist, $id)
if ! $typesymbol{$oclass->{$id}}
&& $cache->{$id}->can('postload');
}
while (@cblist) {
my $id = shift @cblist;
my $obj = $cache->{$id};
$obj->postload($id);
}
print "*$objectid load_object finished: $qval{$cache->{$objectid}}\n" if $debug_load_values;
assertions($oops);
return $cache->{$objectid};
}
sub load_virtual_object
{
my ($oops, $objectid) = @_;
$objectid = $oops->{named_objects}{$objectid}
if $objectid == 0;
confess unless $objectid;
my $objectinfoQ = $oops->query('objectinfo', execute => $objectid) || die $oops->errstr;
my (undef, $loadgroup, $class, $otype, $virtual, $reftarg, $reserved, $arraylen, $refs, undef, $gcgen) = $objectinfoQ->fetchrow_array();
die "no object $objectid: ".$objectinfoQ->errstr unless $otype;
$objectinfoQ->finish();
my %underlying;
my $obj = \%underlying;
bless $obj, $class unless $typesymbol{$class};
print "*$objectid BLESSED $obj at ".__LINE__."\n" if $debug_blessing;
print "TIE %$objectid OOPS::DemandHash\n" if $debug_tie;
my $tied = tie %$obj, 'OOPS::DemandHash', $oops, $objectid;
$oops->{virtual}{$objectid} = 'V';
$oops->{arraylen}{$objectid} = $arraylen;
$oops->{reftarg}{$objectid} = $reftarg;
print "new object *$objectid, arraylen = 0\n" if $debug_arraylen;
$oops->{otype}{$objectid} = 'H';
$oops->{class}{$objectid} = $class;
$oops->{loadgroup}{$objectid} = $objectid;
$oops->{cache}{$objectid} = $obj;
$oops->{refcount}{$objectid} = $refs;
$oops->{gcgeneration}{$objectid} = $gcgen;
print "VH$objectid loaded gcgen = $gcgen\n" if $debug_gcgeneration;
$oops->memory($obj, $objectid);
$oops->memory($tied, $objectid);
print "MEMORY $qval{$obj} := *$objectid' - in load_virtual_object\n" if $debug_memory;
print "MEMORY(TIED) $qval{$tied} := *$objectid' - in load_virtual_object\n" if $debug_memory;
$oops->{groupset}{$objectid}{$objectid} = 1;
print "in load_virtual_object, V% *$objectid loaded, refcount=$refs\n" if $debug_refcount || $debug_load_object;
assertions($oops);
return $obj;
}
sub process_deferred_virtualize
{
my ($oops) = @_;
for my $obj (values %{$oops->{virtualize}}) {
next unless defined $obj; # it's a weak reference
my $id = $oops->get_object_id($obj);
$oops->virtual_object($id, 1);
}
}
sub virtual_object
{
my ($oops, $obj, $newval) = @_;
my $id;
if (ref($obj)) {
my $mem = refaddr($obj);
$id = $oops->{memory}{$mem};
unless ($id) {
# defer virtualization until later
my $old = exists $oops->{virtualize}{$mem};
if (@_ > 2) {
if ($newval) {
$oops->{virtualize}{$mem} = $obj;
weaken($oops->{virtualize}{$mem});
} else {
delete $oops->{virtualize}{$mem};
}
}
return $old;
}
} else {
$id = $obj;
}
croak unless $oops->{otype}{$id};
my $old = $oops->{virtual}{$id} eq 'V';
print "*$id - virtual_object($newval)\n" if $debug_load_group;
if (@_ > 2) {
if ($newval) {
unless ($oops->{virtual}{$id} eq 'V') {
$oops->{virtual}{$id} = 'V';
# break apart old load group
my $olg = $oops->{loadgroup}{$id};
print "in virtual_object($id), must break apart '$olg'\n" if $debug_load_group;
for my $o (keys %{$oops->{groupset}{$olg}}) {
print "in virtual_object($id) setting new group for *$o\n" if $debug_load_group;
print "in virtual_object, *$id forcesave\n" if $debug_forcesave;
$oops->{loadgroup}{$o} = $o;
$oops->{forcesave}{$o} = __LINE__;
}
}
} else {
$oops->{virtual}{$id} = '0';
}
$oops->{forcesave}{$id} =
sprintf("%d/%d/%d", __LINE__, (caller(1))[2], (caller(2))[2]); my $x = # debug
__LINE__;
print "in virtual_object, forcesave *$id virtual=$newval\n" if $debug_forcesave;
print "%$id - virtual: $newval.\n" if $debug_isvirtual;
}
assertions($oops);
return $old;
}
sub lock {
my ($oops, $thing) = @_;
croak "lock() requires a reference" unless ref($thing);
my $mem = refaddr($thing);
if ((my $r = $oops->{memory2key}{$mem})) {
my ($id, $key) = @$r;
return $oops->{dbo}->lock_attribute($id, $key);
}
if ((my $id = $oops->{memory}{$mem})) {
return $oops->{dbo}->lock_object($id);
}
if ((my ($tiedaddr, $key) = tied_hash_reference($_[0]))) {
my $id = $oops->{memory}{$tiedaddr} || $oops->{new_memory}{$tiedaddr};
return 0 unless $id;
return $oops->{dbo}->lock_attribute($id, $key);
}
return 0;
}
# clears only safe parts of the cache
sub clear_cache
{
my ($oops) = @_;
for my $obj (@{$oops->{vcache}}) {
$obj->CLEAR_CACHE();
}
}
sub transaction
{
shift if ref $_[0] ne 'CODE';
my ($code, @args) = @_;
local($transaction_tries) = 1;
my $auto_die;
for (;;) {
croak "next or redo inside eval" if $auto_die; # protect aginst 'next' et all inside eval
$auto_die = 1;
local(@transaction_rollback) = ();
if (wantarray) {
my @r;
eval { @r = (&$code(@args)); };
return @r unless $@;
} else {
my $r;
eval { $r = &$code(@args); };
return $r unless $@;
};
my $error = $@;
for my $r (@transaction_rollback) {
&$r($error);
}
if ($error =~ /($transfailrx)/) {
croak "aborting transaction -- persistent deadlock: $1"
if $transaction_tries++ > $transaction_maxtries;
$auto_die = 0;
require Time::HiRes;
import Time::HiRes qw(sleep);
if ($transaction_failure_sleep) {
my $base = $transaction_failure_maxsleep ** (1 / $transaction_maxtries);
my $sleeptime = rand($transaction_failure_sleep * $base ** ($transaction_tries-1));
printf STDERR "Sleeping %.2f seconds, restarting transaction ($transaction_tries)\n", $sleeptime;
sleep($sleeptime);
} else {
print STDERR "Restarting transaction ($transaction_tries)\n" if $warnings;
}
redo;
}
print STDERR "E='$error'\n"; # debug
croak $error;
}
croak "last inside eval"; # protect aginst 'next' et all inside eval
}
#
# make a reference to a tied hash key
#
sub getref(\%$)
{
my $hash = shift;
my $key = shift;
my $tied = tied %$hash;
confess unless reftype($hash) eq 'HASH';
return \$hash->{$key} unless $tied && $tied->can('GETREF');
print "getref getting references for '$key'\n" if $debug_27555;
return $tied->GETREF($key);
}
sub rollback
{
my $oops = shift;
$oops->{dbo}->rollback();
$oops->DESTROY();
}
sub commit
{
my $oops = shift;
die if $oops->{readonly};
$oops->save;
my $x = int(rand($debug_tdelay)); if ($debug_tdelay && $debug_dbidelay) { for (my $i = 0; $i < $x; $i++) {} }
$oops->{dbo}->commit || die $oops->errstr;
print "COMMIT $oops done\n" if $debug_commit;
assertions($oops);
}
#
# There are two parts to saving state: saving the objects and
# saving the object attributes.
#
# Rewrite: save all attributes before saving the objects.
#
# Object records will be re-written if:
# $oops->{refmore}{$id}
# $oops->{refless}{$id}
# $oops->{forcesave}{$id}
#
# Contents will be re-written if:
# $oops->{unwatched}{$id}
# $oops->{objtouched}{$id}
# $oops->{demandwrite}{$id}
#
sub save
{
my ($oops) = @_;
confess "only one commit() allowed" if $oops->{commitdone}++;
print "COMMIT start \@ $caller{1}\n" if $debug_commit;
confess unless $oops->isa('OOPS');
my $savedone = $oops->{savedone} = {};
my $forcesave = $oops->{forcesave};
my $cache = $oops->{cache};
my $refcount = $oops->{refcount};
my $oloadgroup = $oops->{loadgroup};
my $type = $oops->{otype};
my $oclass = $oops->{class};
my $refmore = $oops->{refmore};
my $refless = $oops->{refless};
my $refstowrite = $oops->{refstowrite};
my $loadgrouplock = $oops->{loadgrouplock};
my $virtual = $oops->{virtual};
my $arraylen = $oops->{arraylen};
my $reftarg = $oops->{reftarg};
my @tied;
local($oops->{insave}) = 1;
$oops->process_deferred_virtualize();
#
# ARRAYs are always considered 'touched' and thus
# must be rechecked.
#
# HASHes that have been DESTROYed are considered 'touched'
#
# NEW object are always touched
#
for my $id (keys %{$oops->{objtouched}}) {
print "*$id->write_object (touched: $oops->{objtouched}{$id})\n" if $debug_commit;
$oops->write_object($id);
}
#
# tied HASHes (both sorts) that have been modified insert
# themselves into the demandwrite set.
#
# As a side-effect of saving tied hashes, there may be additional
# unwatched objects to save.
#
for my $id (keys %{$oops->{demandwrite}}) {
print "*$id->write_object (demandwrite)\n" if $debug_commit;
$oops->write_object($id);
my $tied;
my $t = $type->{$id};
if ($t eq 'H') {
$tied = tied %{$cache->{$id}};
} elsif ($t eq 'A') {
$tied = tied @{$cache->{$id}};
} elsif ($t eq 'S') {
$tied = tied ${$cache->{$id}};
} else {
confess "type = $t.";
}
push(@tied, $tied);
}
#
# Some objects are not tied in any way and we just have to
# check them to make sure they haven't changed.
#
for my $id (keys %{$oops->{unwatched}}) {
print "*$id->write_object (unwatched)\n" if $debug_commit;
$oops->write_object($id);
}
my %classdone;
my $firstid;
my $updateobjectQ = $oops->query('updateobject');
my $objectinfoQ = $oops->query('objectinfo');
my %done;
my $pass;
#
# Look at objects and make adjustments while there
# remains %refmore, %refless or @refstowrite.
#
for(;;) {
# more refstowrite may be added while looking at refmore
while (@$refstowrite) {
$oops->write_ref(shift @$refstowrite);
}
# Do additions before subtractions so that we don't have
# any false deletes.
my $refchange;
if (%{$oops->{refmore}}) {
$refchange = $oops->{refmore};
$oops->{refmore} = {};
} elsif (%{$oops->{refless}}) {
$refchange = $oops->{refless};
$oops->{refless} = {};
} else {
last;
}
print "commit, pass $pass\n" if $debug_commit && $pass++;
for my $id (keys %$refchange) {
while (@$refstowrite) {
$oops->write_ref(shift @$refstowrite);
}
if ($refchange->{$id}) {
#
# The reference count for $id needs to be changed.
#
if (exists $cache->{$id}) {
#
# Object is loaded.
#
printf "in commit, *%d refs: old %d + change %s (=%d)\n", $id, $refcount->{$id}, $qplusminus{$refchange->{$id}}, $refcount->{$id}+ $refchange->{$id} if $debug_refcount;
my $newobject = ($refcount->{$id} == -1);
$refcount->{$id} += $refchange->{$id};
if ($oops->{refless}{$id} and $refcount->{$id} + $oops->{refless}{$id} > 0) {
$refcount->{$id} += $oops->{refless}{$id};
delete $oops->{refless}{$id};
}
if ($refcount->{$id} > 0) {
my $otype = $type->{$id} || confess;
my $loadgroup;
if (exists $loadgrouplock->{$id}) {
my $locked_to = $loadgrouplock->{$id};
if (exists $refchange->{$locked_to}) {
#
# they'll be saved together
#
$firstid ||= $id;
$loadgroup ||= $firstid;
} else {
$loadgroup = $oloadgroup->{$locked_to};
}
} elsif ($virtual->{$id} eq 'V') {
$loadgroup = $id;
} else {
$firstid ||= $id;
$loadgroup ||= $firstid;
}
$oloadgroup->{$id} = $loadgroup;
die if $oops->{deleted}{$id}; # assertion
print "*$id updated1 (later). loadgroup=$loadgroup, class=$qref{$cache->{$id}} otype=$otype, virtual=$virtual->{$id} reftarg=$reftarg->{$id} refcount=$refcount->{$id} arraylen=$arraylen->{$id} gcgen=$oops->{gcgeneration}{$id}\n" if $debug_load_group || $debug_isvirtual || $debug_write_object || $debug_arraylen || $debug_refcount;
$forcesave->{$id} = __LINE__;
$oclass->{$id} = ref($cache->{$id});
$classdone{$id} = __LINE__;
} elsif ($refcount->{$id} == 0) {
print "*$id - no refereces, will delete\n" if $debug_write_object || $debug_refcount;
#print "refcount *$id = 0, deleting\n";
$oops->delete_object($id);
$done{$id} = __LINE__;
} else {
confess "refcount: $refcount->{$id}";
}
} else {
#
# Object is not loaded, fetch the refcount.
#
# TODO/OPTIMIZATION: this may result in extra queries. Cache the refcounts and
# delay the writes the same way as is done for cached objects.
#
$objectinfoQ->execute($id) || confess;
my (undef, $loadgroup, $class, $otype, $ovirtual, $oreftarg, undef, $oarraylen, $refs, $counter, $gcgen) = $objectinfoQ->fetchrow_array;
$objectinfoQ->finish();
confess unless $class;
printf "in commit, uncached *%d refs: old %d +change %d = (=%d)\n", $id, $refs, $refchange->{$id}, $refs+ $refchange->{$id} if $debug_refcount || $debug_write_object;
$refcount->{$id} = $refs + $refchange->{$id};
if ($oops->{refless}{$id} and $refcount->{$id} + $oops->{refless}{$id} > 0) {
$refcount->{$id} += $oops->{refless}{$id};
delete $oops->{refless}{$id};
}
confess if exists $cache->{$id};
if ($refcount->{$id} > 0) {
die if $oops->{deleted}{$id}; # assertion
$updateobjectQ->execute($loadgroup, $class, $otype, $ovirtual || '0', $oreftarg, $oarraylen, $refcount->{$id}, $gcgen, $id);
print "*$id updated2. loadgroup=$loadgroup, type=$class, otype=$otype, refcount=$refcount->{$id} virtual=$ovirtual reftarg=$oreftarg arraylen=$oarraylen, gcgen=$gcgen\n" if $debug_load_group || $debug_write_object || $debug_arraylen || $debug_refcount || $debug_gcgeneration;
$done{$id} = __LINE__;
} elsif ($refcount->{$id} == 0) {
$oops->delete_object($id);
$done{$id} = __LINE__;
} else {
confess "refcount: $refcount->{$id}";
}
}
} else {
if ($refcount->{$id} > 0) {
printf "*$id no change in refcount, marking for forced saving\n" if $debug_refcount || $debug_write_object;
$forcesave->{$id} = __LINE__;
} elsif ($refcount->{$id} == 0) {
printf "in commit, deleting unchanged unreferenced $oops->{otype}{$id}*$id (=0)\n" if $debug_refcount || $debug_write_object;
$oops->delete_object($id);
$done{$id} = __LINE__;
} else {
confess "negative refcount: *$id: $refcount->{$id}";
}
}
}
}
#
# We have to manually scan for objects that have
# re-blessed themselves as there is no way to watch
# for that.
#
for my $id (keys %$cache) {
next unless defined $cache->{$id};
next if exists($oclass->{$id}) && ref($cache->{$id}) eq $oclass->{$id};
next if $classdone{$id};
printf "classchange %d: %s -> %s.\n", $id, $oclass->{$id}, ref($cache->{$id}) if $debug_commit;
$oclass->{$id} = ref($cache->{$id});
$forcesave->{$id} = __LINE__
unless $forcesave->{$id};
}
#
# XX PARTIAL IMPLEMENTATION:
# For database servers that use deadlock detection (rather
# than opportunistic locking) we could force the object rows to
# get updated whenever an attribute is added or deleted. This
# allows a less strict tranaction locking default.
#
#
my $die;
for my $id (keys %$forcesave) {
next if $done{$id};
my $otype = $type->{$id} || confess
"at line $forcesave->{$id} (from $oops->{memsetdebug}{$id})... " . # debug
"no type for object $id";
my $loadgroup = $oloadgroup->{$id} || $id;
die if $oops->{deleted}{$id}; # assertion
print "*$id updated3. loadgroup=$loadgroup, type=".ref($cache->{$id})." otype=$otype, refcount=$refcount->{$id} virtual=$virtual->{$id} reftarg=$reftarg arraylen=$arraylen->{$id} gcgen=$oops->{gcgeneration}{$id}\n" if $debug_load_group || $debug_write_object || $debug_arraylen || $debug_refcount || $debug_gcgeneration;
$updateobjectQ->execute($loadgroup, ref($cache->{$id}), $otype, $virtual->{$id}, $reftarg->{$id}, $arraylen->{$id}, $refcount->{$id}, $oops->{gcgeneration}{$id}, $id)
|| confess $updateobjectQ->errstr;
$oclass->{$id} = ref($cache->{$id});
}
for my $tied (@tied) {
$tied->POST_SAVE;
}
$oops->{forcesave} = {};
}
#
# This saves the contents of an object. The object
# itself is updated in save().
#
sub write_object
{
my ($oops, $id, $sponsoring_id) = @_;
$id = $oops->get_object_id($id, $sponsoring_id)
if ref $id;
return if $oops->{savedone}{$id}++;
print Carp::longmess("DEBUG: write_object(@_) called") if $debug_write_object_context;
my $obj = $oops->{cache}{$id};
my $type = $perltype2otype{reftype($obj)} || confess;
my $sym = $typesymbol{$type} || '???' if $debug_write_object;
print "$sym*$id write_object $qval{$obj}\n" if $debug_write_object;
my $memory = $oops->{memory};
# would this help?
# if ($oops->{class}{$id} ne ref $obj) {
# $oops->{refcount}{$id} += 0; # touchit
# }
if ($type eq 'H') {
my $tied = tied(%$obj);
if ($tied && $tied =~ /^OOPS/) {
print "%*$id write_object - using SAVE_SELF $qval{$tied}\n" if $debug_write_hash;
$tied->SAVE_SELF();
} else {
$oops->write_hash($obj, $id);
}
} elsif ($type eq 'A') {
$oops->write_array($id);
} elsif ($type eq 'S') {
my $tied = tied($$obj);
if ($tied && $tied =~ /^OOPS/) {
print "\$*$id using SAVE_SELF $tied\n" if $debug_write_ref;
$tied->SAVE_SELF() && push(@{$oops->{refstowrite}}, $id);
} else {
print "\$*$id will use write_ref later\n" if $debug_write_ref;
if (ref $$obj) {
my $m;
if ($m = $memory->{refaddr($$obj)}) {
print "lookup MEMORY($qval{$$obj}) = $m in write_object - ref\n" if $debug_memory;
print "\$*$id is an existing object *$m\n" if $debug_write_ref;
} else {
print "lookup MEMORY($qval{$$obj}) = ? in write_object - ref\n" if $debug_memory;
$m = $oops->get_object_id($$obj, $id);
print "\$*$id is a new object *$m: $qval{$$obj}\n" if $debug_write_ref;
}
$oops->write_object($m, $id);
} else {
print "\$*$id is a ref to a scalar $qval{$$obj}\n" if $debug_write_ref;
}
push(@{$oops->{refstowrite}}, $id);
}
} else {
confess;
}
print "$sym*$id done with write_object\n" if $debug_write_object;
assertions($oops);
}
sub write_hash
{
my ($oops, $obj, $id, $ptypes, $added) = @_;
print Carp::longmess("DEBUG: write_hash(@_) called") if 0; # debug
my $oldvalue = $oops->{oldvalue};
my $oldobject = $oops->{oldobject};
my $oldbig = $oops->{oldbig};
my $memory = $oops->{memory};
my $memory2key = $oops->{memory2key};
my $new_memory = $oops->{new_memory};
my $new_memory2key = $oops->{new_memory2key};
my $tied = tied %{$oops->{cache}{$id}};
confess unless ref $obj;
my (@k) = keys %$obj;
#
# auto-virtualize. Good idea?
#
# if (@k > $demandthreshold && ! exists($oops->{loadvirtual}{$id})) {
# $oops->virtual_object($id, 1)
# } elsif (@k < $demandthreshold && exists($oops->{loadvirtual}{$id})) {
# $oops->virtual_object($id, 0)
# }
for my $pkey (@k) {
unless ($tied) {
my $m = refaddr(\$obj->{$pkey});
$oops->new_memory2key(\$obj->{$pkey}, $id, $pkey);
print "NEWMEMORY2KEY ".$m." := \%*$id/'$pkey' - in write_hash\n" if $debug_memory;
}
{ no warnings; print "\%$id/$qval{$pkey} pondering... ($qval{$obj->{$pkey}})\n" if $debug_write_hash; }
print "ref to \%$id/$qval{$pkey} is $qval{\$obj->{$pkey}}\n" if $debug_write_hash && $debug_refalias;
if ($ptypes && exists $ptypes->{$pkey}) {
print "\%$id/$pkey ...still not loaded ($ptypes->{$pkey})\n" if $debug_write_hash;
} elsif (exists $oldvalue->{$id} && exists $oldvalue->{$id}{$pkey}) {
no warnings;
if ($oldvalue->{$id}{$pkey} eq $obj->{$pkey}
&& defined($oldvalue->{$id}{$pkey}) == defined($obj->{$pkey})
&& ref($oldvalue->{$id}{$pkey}) eq ref($obj->{$pkey}))
{
use warnings;
print "\%$id/$pkey ...unchanged\n" if $debug_write_hash;
print "lookup MEMORY($qval{$obj->{$pkey}}) in write_hash\n" if $debug_memory;
$oops->write_object($memory->{refaddr($obj->{$pkey})}, $id)
if ref $obj->{$pkey};
} else {
use warnings;
{ no warnings; print "\%$id/$pkey ...changed. old value was $oldvalue->{$id}{$pkey}\n" if $debug_write_hash; }
$oops->update_attribute($id, $pkey, $obj->{$pkey}, undef, $oldvalue->{$id}{$pkey});
}
} elsif (exists $oldbig->{$id} && exists $oldbig->{$id}{$pkey}) {
my $ock = ref($obj->{$pkey}) ? '' : bigcksum($obj->{$pkey});
if ($oldbig->{$id}{$pkey} eq $ock) {
print "\%$id/$pkey ...unchanged (big)\n" if $debug_write_hash;
# this attribute is unchanged
} else {
print "\%$id/$pkey ...changed. old big\n" if $debug_write_hash;
$oops->update_attribute($id, $pkey, $obj->{$pkey}, $ock);
}
} elsif (exists $oldobject->{$id} && exists $oldobject->{$id}{$pkey}) {
# this used to be an object
print "\%$id/$pkey this used to be an object...\n" if $debug_write_hash;
if (ref $obj->{$pkey} && $oldobject->{$id}{$pkey} == $oops->get_object_id($obj->{$pkey}, $id)) {
# no change
print "\%$id/$pkey same one\n" if $debug_write_hash;
$oops->write_object($oldobject->{$id}{$pkey}, $id);
} else {
print "\%$id/$pkey changed to $qval{$obj->{$pkey}}\n" if $debug_write_hash;
$oops->update_attribute($id, $pkey, $obj->{$pkey});
}
} elsif ($added) {
if (exists $added->{$pkey}) {
# this is a new value
{ no warnings; print "\%$id/$pkey ...added: $qval{$obj->{$pkey}}\n" if $debug_write_hash; }
$oops->insert_attribute($id, $pkey, undef, $obj->{$pkey});
} else {
{ no warnings; print "\%$id/$pkey ...still original value: $qval{$obj->{$pkey}}\n" if $debug_write_hash; }
}
} else {
# this is a new value
print "\%$id/$pkey ...new value A\n" if $debug_write_hash;
$oops->insert_attribute($id, $pkey, undef, $obj->{$pkey});
}
}
if (exists $oldvalue->{$id}) {
print "\%$id checking old values\n" if $debug_write_hash;
for my $pkey (keys %{$oldvalue->{$id}}) {
next if exists $obj->{$pkey};
# this pkey has gone away
{ no warnings; print "\%$id/$pkey delete extra old value \%$id/$pkey ($oldvalue->{$id}{$pkey})\n" if $debug_write_hash; };
$oops->delete_attribute($id, $pkey, $oldvalue->{$id}{$pkey});
}
}
if (exists $oldobject->{$id}) {
print "\%$id checking old objects\n" if $debug_write_hash;
for my $pkey (keys %{$oldobject->{$id}}) {
next if exists $obj->{$pkey};
next if exists $oldvalue->{$id} && exists $oldvalue->{$id}{$pkey};
# this pkey has gone away
print "\%$id/$pkey delete extra old object \%$id/$pkey ($oldvalue->{$id}{$pkey})\n" if $debug_write_hash;
$oops->delete_attribute($id, $pkey);
}
}
if (exists $oldbig->{$id}) {
for my $pkey (keys %{$oldbig->{$id}}) {
next if exists $obj->{$pkey};
next if exists $oldvalue->{$id} && exists $oldvalue->{$id}{$pkey};
print "\%$id/$pkey delete extra old big \%$id/$pkey\n" if $debug_write_hash;
$oops->delete_attribute($id, $pkey);
}
}
assertions($oops);
}
sub write_array
{
my ($oops, $id) = @_;
my $obj = $oops->{cache}{$id};
my $sym = '@' if $debug_write_object || $debug_write_array;
print "$sym$id write_object $obj\n" if $debug_write_object;
my $oldvalue = $oops->{oldvalue};
my $oldobject = $oops->{oldobject};
my $oldbig = $oops->{oldbig};
my $memory = $oops->{memory};
my $new_memory = $oops->{new_memory};
my $new_memory2key = $oops->{new_memory2key};
my $tied;
my $isnew = $oops->{refcount}{$id} == -1;
#print "WRITE ARRAY ".__LINE__." with $#$obj\n";
#print join('',(map { exists $obj->[$_] ? '1' : '0' } 0..$#$obj),"\n");
#
# XXXTODO
# There is a nasty problem: splice, shift, pop, unshift, and push can
# move around array elements without causing big elements to be
# loaded. When it comes time to save these moved elements, we have to
# still have access to the old values. Doing the save in exactly the
# right order could allow the values to be shifted in the database rather
# than read and re-written.
#
# With refcopy we should be able to handle this now!
#
for (my $index = 0; $index <= $#$obj; $index++) {
my $tied;
next unless exists $obj->[$index];
next unless ($tied = tied $obj->[$index]) && $tied->isa('OOPS::BigInArray');
undef $tied; # keeping copies of tied objects prevents untieing.
my $x = defined($obj->[$index]); # force loading (which will untie)
}
my $end = $#$obj;
$end = $oops->{arraylen}{$id} -1
if defined($oops->{arraylen}{$id}) && $oops->{arraylen}{$id} > $end;
print "$sym$id checking 0..$end ($#$obj/$oops->{arraylen}{$id}) \n" if $debug_write_array;
for (my $index = 0; $index <= $end; $index++) {
if (! exists $obj->[$index]) {
if (exists $oldvalue->{$id} && exists $oldvalue->{$id}{$index}) {
print "$sym$id/$index ...deleting extra old value ($oldvalue->{$id}{$index})\n" if $debug_write_array;
$oops->delete_attribute($id, $index, $oldvalue->{$id}{$index});
} elsif (exists $oldobject->{$id} && exists $oldobject->{$id}{$index}) {
print "$sym$id/$index ...deleting extra old object ($oldobject->{$id}{$index})\n" if $debug_write_array;
$oops->delete_attribute($id, $index);
} elsif (exists $oldbig->{$id} && exists $oldbig->{$id}{$index}) {
print "$sym$id/$index ...deleting extra old big ($oldbig->{$id}{$index})\n" if $debug_write_array;
$oops->delete_attribute($id, $index);
} else {
print "$sym$id/$index no value now, now value before\n" if $debug_write_array;
}
next;
}
print "$sym$id/$index pondering... ($obj->[$index])\n" if $debug_write_array;
my $tied;
if (($tied = tied $obj->[$index]) && $tied =~ /^OOPS::Demand/ && ! $tied->changed($index)) {
print "\@$id/$index tied and unchanged\n" if $debug_write_array;
} elsif (exists $oldvalue->{$id} && exists $oldvalue->{$id}{$index}) {
no warnings;
if ($oldvalue->{$id}{$index} eq $obj->[$index]
&& defined($oldvalue->{$id}{$index}) == defined($obj->[$index])
&& ref($oldvalue->{$id}{$index}) eq ref($obj->[$index]))
{
use warnings;
print "$sym$id/$index ...reference - no change\n" if $debug_write_array;
print "lookup MEMORY($qval{$obj->[$index]}) in write_object - array\n" if $debug_memory && ref($obj->[$index]);
$oops->write_object($memory->{refaddr($obj->[$index])}, $id)
if ref $obj->[$index];
next;
} else {
use warnings;
# this attribute's value has changed
print "$sym$id/$index ...changed from '$oldvalue->{$id}{$index}'\n" if $debug_write_array;
$oops->update_attribute($id, $index, $obj->[$index], undef, $oldvalue->{$id}{$index});
}
} elsif (exists($oldobject->{$id}) && exists($oldobject->{$id}{$index})) {
print "\@$id/$index this used to be an object: *$oldobject->{$id}{$index}\n" if $debug_write_array;
if (ref $obj->[$index] && $oldobject->{$id}{$index} == $oops->get_object_id($obj->[$index], $id)) {
print "\@$id/$index same one - no change\n" if $debug_write_array;
$oops->write_object($oldobject->{$id}{$index}, $id);
next;
} else {
print "\@$id/$index changed\n" if $debug_write_array;
$oops->update_attribute($id, $index, $obj->[$index]);
}
} elsif ($bigcutoff && exists($oldbig->{$id}) && exists($oldbig->{$id}{$index})) {
my $ock = (!ref($obj->[$index]) && defined($obj->[$index]) && length($obj->[$index]) > $bigcutoff)
? bigcksum($obj->[$index])
: undef;
if ($ock && $oldbig->{$id}{$index} eq $ock) {
print "$sym$id/$index ...big - no change\n" if $debug_write_array;
next;
} else {
print "$sym$id/$index ...big changed\n" if $debug_write_array;
$oops->update_attribute($id, $index, $obj->[$index], $ock);
}
} else {
# this is a new value
print "$sym$id/$index ...new value B\n" if $debug_write_array;
$oops->insert_attribute($id, $index, undef, $obj->[$index]);
}
my $m = refaddr(\$obj->[$index]);
$oops->new_memory2key(\$obj->[$index], $id, $index);
print "NEWMEMORY2KEY ".$m." := \@*$id/$index - in write_object - array\n" if $debug_memory;
}
if (! defined($oops->{arraylen}{$id}) || $oops->{arraylen}{$id} != @$obj) {
$oops->{arraylen}{$id} = @$obj;
$oops->{forcesave}{$id} = __LINE__;
print "in write_array, arraylen(\@*$id) = $oops->{arraylen}{$id}, forcesave\n" if $debug_arraylen || $debug_forcesave;
} else {
print "in write_array, leaving arraylen for \@*$id at $oops->{arraylen}{$id}\n" if $debug_arraylen;
}
}
#
# References are always indirect through another
# object. If the reference isn't indirect, then
# we pretend it is.
#
# ATTRIBUTE TABLE
# id pkey pvalue ptype
# targetid targetkey
#
# 383 400 swarmy 0
#
# 384 384 'nopkey' 0
# 384 'nopkey' a-value 0
#
# 385 384 'nopkey' 0
#
# Reference 383 is indirect though object 400: \%400{swarmy}
#
# Reference 384 is a ref to scalar. It uses two rows.
#
# Reference 385 is a ref to scalar that is shared with another
# reference.
#
# The purpose of this schema is to allow queries against references
# without needing to know if the reference is to another object
# or not.
#
# Unlike other variable types, write_ref might be called multiple
# times for the same scalar during a commit() because that scalar
# might have become disconnected.
#
sub write_ref
{
my ($oops, $id) = @_;
if ($oops->{deleted}{$id}) {
print "*$id WRITE_REF - already deleted - ignoring\n" if $debug_write_ref;
return;
}
my $obj = $oops->{cache}{$id};
my $oldvalue = $oops->{oldvalue};
my $oldobject = $oops->{oldobject};
my $oldbig = $oops->{oldbig};
my $memory = $oops->{memory};
my $memory2key = $oops->{memory2key};
my $new_memory = $oops->{new_memory};
my $new_memory2key = $oops->{new_memory2key};
my $oldalias = $oops->{oldalias};
my $addr = refaddr($obj);
my $sym;
$sym = '$' if $debug_write_ref;
print "\$*id WRITE_REF new value: $qval{$obj}\n" if $debug_write_ref;
my $targetid;
my $targetkey;
my $targettiedmem;
if (ref($$obj) && $addr == refaddr($$obj)) {
# reference to self...
($targetid, $targetkey) = ($nopkey, $obj);
} elsif (exists $new_memory2key->{$addr} && $new_memory2key->{$addr}[0] != $id) {
($targetid, $targetkey) = @{$new_memory2key->{$addr}};
print "\$*$id WRITE_REF new_memory2key($qval{$obj}) says: *$targetid/$qval{$targetkey} \n" if $debug_write_ref || $debug_memory;
} elsif (exists $memory2key->{$addr} && $memory2key->{$addr}[0] != $id) {
($targetid, $targetkey) = @{$memory2key->{$addr}};
no warnings;
print "\$*$id WRITE_REF memory2key($qval{$obj}) says: *$targetid/$qval{$targetkey} \n" if $debug_write_ref || $debug_memory;
} elsif (exists $new_memory->{$addr} && $memory->{$addr} != $id) {
$targetid = $nopkey;
$targetkey = $$obj;
no warnings;
print "\$*$id WRITE_REF new_memory($qval{$obj}) says: *$targetid/$qval{$targetkey} \n" if $debug_write_ref || $debug_memory;
} elsif (exists $memory->{$addr} && $memory->{$addr} != $id) {
$targetid = $nopkey;
$targetkey = $$obj;
print "\$*$id WRITE_REF memory($qval{$obj}) says: *$targetid/$qval{$targetkey} \n" if $debug_write_ref || $debug_memory;
} elsif (($targettiedmem, $targetkey) = tied_hash_reference($obj)) {
$targetid = $memory->{$targettiedmem} || $new_memory->{$targettiedmem};
print "\$*$id WRITE_REF tied hash reference: $targetid/$qval{$targetkey}\n" if $debug_write_ref;
no warnings;
if (! $targetid) {
use warnings;
print "\$*$id WRITE_REF was disassociated, now *$nopkey/$qval{$$obj}\n" if $debug_write_ref;
$targetkey = $$obj;
$targetid = $nopkey;
$oops->new_memory2key($obj, $id, $nopkey);
print "NEWMEMORY2KEY ".$addr." = \%*$id/$nopkey - in write_ref\n" if $debug_memory;
} elsif ($$obj ne $oops->{cache}{$targetid}{$targetkey}) {
#
# Must have been delete'd in the meantime and become
# disassoicated from the cache. Unfortunantly the refaddr()
# for such references is unique so we must guess if they
# should be rejoined.
#
# Ugh!
#
use warnings;
if ($targetid && exists $oops->{disassociated}{$targetid}{$targetkey}{$$obj}) {
print "\$*$id WRITE_REF was disassociated, joining to *$oops->{disassociated}{$targetid}{$targetkey}{$$obj}/$qval{$nopkey}\n" if $debug_write_ref;
$targetid = $oops->{disassociated}{$targetid}{$targetkey}{$$obj};
$targetkey = $nopkey;
} else {
$oops->{disassociated}{$targetid}{$targetkey}{$$obj} = $id;
print "\$*$id WRITE_REF was disassociated, now *$nopkey/$qval{$$obj}\n" if $debug_write_ref;
$targetkey = $$obj;
$targetid = $nopkey;
$oops->new_memory2key($obj, $id, $nopkey);
print "NEWMEMORY2KEY ".$addr." = \%*$id/$nopkey - in write_ref\n" if $debug_memory;
}
}
} else {
# must be a reference to an independent scalar or object
$targetid = $nopkey;
$targetkey = $$obj;
print "\$*$id WRITE_REF independent, now *$targetid/$qval{$targetkey}\n" if $debug_write_ref;
$oops->new_memory2key($obj, $id, $nopkey);
print "NEWMEMORY2KEY ".$addr." = \%*$id/$nopkey - in write_ref\n" if $debug_memory;
}
if (exists $oops->{deleted}{$targetid}) {
print "\$*$id WRITE_REF now independent, now *$nopkey/$qval{$$obj} had been ref to $targetid/$qval{$targetkey} but *$targetid was deleted\n" if $debug_write_ref;
$targetid = $nopkey;
$targetkey = $$obj;
$oops->new_memory2key($obj, $id, $nopkey);
print "NEWMEMORY2KEY ".$addr." = \%*$id/$nopkey - in write_ref\n" if $debug_memory;
}
my ($oldid, $oldpkey, $oldval);
my $ock;
if (exists $oldalias->{$id}) {
($oldid, $oldpkey) = @{$oldalias->{$id}};
$oldval = $oldpkey;
print "\$*$id WRITE_REF oldalias: *$oldid/$qval{$oldpkey} = $qval{$oldval}\n" if $debug_write_ref;
} elsif (exists $oldvalue->{$id} && exists $oldvalue->{$id}{$nopkey}) {
$oldid = $nopkey;
$oldpkey = $oldvalue->{$id}{$nopkey};
$oldval = $oldpkey;
print "\$*$id WRITE_REF oldvalue: *$oldid/$qval{$oldpkey} = $qval{$oldval}\n" if $debug_write_ref;
} elsif (exists $oldbig->{$id} && exists $oldbig->{$id}{$nopkey}) {
$oldid = $nopkey;
$oldpkey = $oldbig->{$id}{$nopkey};
$ock = (!ref($$obj) && defined($$obj) && length($$obj) > $bigcutoff)
? bigcksum($$obj)
: undef;
$targetkey = $ock if $ock && $oldbig->{$id}{$nopkey} eq $ock;
print "\$*$id WRITE_REF oldbig: *$oldid/$qval{$oldpkey} = $qval{$oldval}\n" if $debug_write_ref;
} elsif (exists $oldobject->{$id} && exists $oldobject->{$id}{$nopkey}) {
$oldid = $nopkey;
$oldpkey = $oldobject->{$id}{$nopkey};
$oldval = $oops->{cache}{$oldpkey};
print "\$*$id WRITE_REF oldobject: *$oldid/$qval{$oldpkey} = $qval{$oldval}\n" if $debug_write_ref;
} else {
print "\$*$id WRITE_REF no old value\n" if $debug_write_ref;
$oldid = undef;
}
# confess if $targetid == $id && $targetkey ne $nopkey; XXXX turn this on -- it's off for debugging
confess unless defined $targetid;
print "\$*$id WRITE_REF target:$targetid/$qval{$targetkey} old:$oldid/$qval{$oldpkey}\n" if $debug_write_ref && defined $oldid;
print "\$*$id WRITE_REF target:$targetid/$qval{$targetkey} no old\n" if $debug_write_ref && ! defined $oldid;
if ($targetid ne $nopkey && ! $oops->{reftarg}{$targetid}) {
# this is presently irreversable
$oops->{reftarg}{$targetid} = 'T';
$oops->{forcesave}{$targetid} = __LINE__;
print "force save of *$targetid as its referended by *$id\n" if $debug_forcesave;
print "*$targetid is now reference target (from $id)\n" if $debug_reftarget;
}
if (defined($oldid) && $targetid eq $oldid) {
if (defined($targetkey) ? (defined($oldpkey) ? $targetkey eq $oldpkey : 0) : ! defined($oldpkey)) {
# unchanged
print "\$*$id WRITE_REF no change\n" if $debug_write_ref;
} else {
print "\$*$id WRITE_REF CHANGE to *$targetid/$qval{$targetkey} (oldval = $qval{$oldval})\n" if $debug_write_ref;
if (ref($oldval)) {
$oops->update_attribute($id, $targetid, $targetkey, $ock);
} else {
$oops->update_attribute($id, $targetid, $targetkey, $ock, $oldval);
}
delete $oops->{oldalias}{$id};
if ($targetid ne $nopkey) {
$oops->{oldalias}{$id} = [ $targetid, $targetkey ];
$oops->{aliasdest}{$targetid}{$id} = $targetkey;
}
}
} else {
#
# Normal references to other objects are:
#
# id=id key=other_obj_id value=other_obj_key
#
# References to unconnected scalars are:
#
# id=id key=nopkey value=the_scalar_value
#
# For references to unconnected scalars, we need an extra tuple
# so that translated sql queries work right:
#
# id=id key=id value=nopkey
#
print "\$*$id WRITE_REF DELETE $qval{$oldid}\n" if $debug_write_ref && defined $oldid;
$oops->delete_attribute($id, $oldid)
if defined $oldid;
print "\$*$id WRITE_REF DELETE $qval{$id}\n" if $debug_write_ref && defined($oldid) && $oldid eq $id;
$oops->delete_attribute($id, $id)
if defined($oldid) && $oldid eq $nopkey;
print "\$*$id WRITE_REF INSERT $qval{$targetid}/$qval{$targetkey}\n" if $debug_write_ref;
$oops->insert_attribute($id, $targetid, { ref => $targetid }, $targetkey);
print "\$*$id WRITE_REF INSERT $qval{$id}/$qval{$nopkey}\n" if $debug_write_ref && $targetid eq $nopkey;
$oops->insert_attribute($id, $id, undef, $nopkey)
if $targetid eq $nopkey;
delete $oops->{oldalias}{$id};
if ($targetid ne $nopkey) {
$oops->{oldalias}{$id} = [ $targetid, $targetkey ];
$oops->{aliasdest}{$targetid}{$id} = $targetkey;
}
}
#
# With references to an ARRAY element, we must ensure that the reference is in
# the same loadgroup as the ARRAY because the element may move within the ARRAY
# and that requires re-saving the reference which will only happen if the reference
# happens to be in memory.
#
# With references to a common scalar, we must do the same.
#
if ($targetid ne $nopkey && reftype($oops->{cache}{$targetid}) ne 'HASH') {
if ($oops->{loadgroup}{$targetid} eq $oops->{loadgroup}{$id} && ! exists $oops->{refmore}{$targetid} && ! exists $oops->{refless}{$targetid}) {
# great
} else {
$oops->{forcesave}{$id} = __LINE__;
$oops->{loadgrouplock}{$id} = $targetid;
print "force \$*$id group to be loged to *$targetid\n" if $debug_load_group || $debug_forcesave;
}
}
}
#
# $oops->update_attribute($id, $pkey, $new_value, [ $new_checksum_value ], [ $old_value ])
#
sub update_attribute
{
print Carp::longmess("DEBUG: update_attribute(@_) called") if 0; # debug
my $oops = shift;
my $id = shift;
my $pkey = shift;
my $oldover = exists $oops->{oldbig}{$id} && exists $oops->{oldbig}{$id}{$pkey};
my $oldobject = exists $oops->{oldobject}{$id} && exists $oops->{oldobject}{$id}{$pkey};
my $atval;
my $newover;
my $ptype = '0';
my $overcksum = $_[1];
my $oldvalue = $_[2];
my %change_refs;
#my $newptype = $_[3];
if (defined($_[0]) && length($_[0]) > $bigcutoff) {
$atval = $overcksum || bigcksum($_[0]);
$newover = 1;
$ptype = 'B';
} elsif (ref($_[0])) {
$atval = $oops->get_object_id($_[0], $id);
$change_refs{$atval} += 1;
print "*$id/$pkey update_attribute1, add CURRENT ref to *$atval (+1)\n" if $debug_refcount;
$ptype = 'R';
} else {
$atval = $_[0];
}
if (ref($_[2])) {
# old value was a reference
my $oldid = $oops->get_object_id($_[2], $id);
$change_refs{$oldid} -= 1;
print "OLDOBJECT *$id/$pkey update_attribute2, oldobject = undef (was $oops->{oldobject}{$id}{$pkey})\n" if $debug_oldobject;
delete $oops->{oldobject}{$id}{$pkey};
print "*$id/$pkey update_attribute2, removed OLD ref to *$oldid (-1)\n" if $debug_refcount;
} elsif ($oldobject) {
my $oldid = $oops->{oldobject}{$id}{$pkey};
$change_refs{$oldid} -= 1;
print "OLDOBJECT *$id/$pkey update_attribute3, oldobject = undef (was $oops->{oldobject}{$id}{$pkey})\n" if $debug_oldobject;
delete $oops->{oldobject}{$id}{$pkey};
print "*$id/$pkey update_attribute3, removed OLD ref to *$oldid (-1)\n" if $debug_refcount;
}
if (ref($_[0])) {
$oops->{oldobject}{$id}{$pkey} = $atval;
print "OLDOBJECT *$id/$pkey update_attribute4 = *$atval\n" if $debug_oldobject;
}
print "*$id/$pkey - now: $qval{$atval} ($ptype)\n" if $debug_save_attributes;
my $sym;
$sym = $typesymbol{reftype($oops->{cache}{$id})} if $debug_writes;
print "$sym$id/$pkey update_attribute $qval{$atval} (ptype $ptype)\n" if $debug_writes;
$atval = '0' if defined($atval) && $atval eq '0'; # make sure it's a string
my $updateattributeQ = $oops->query('updateattribute', execute => [ $atval, $ptype, $id, $pkey ]);
if ($oldover && $newover) {
$oops->update_big($id, $pkey, $_[0]);
$oops->{oldbig}{$id}{$pkey} = $atval;
delete $oops->{oldvalue}{$id}{$pkey}
if exists $oops->{oldvalue}{$id} && exists $oops->{oldvalue}{$id}{$pkey};
} elsif ($oldover) {
my $deletebigQ = $oops->query('deletebig', execute => [ $id, $pkey ]);
$oops->{oldvalue}{$id}{$pkey} = $atval;
} elsif ($newover) {
$oops->save_big($id, $pkey, $_[0]);
$oops->{oldbig}{$id}{$pkey} = $atval;
delete $oops->{oldvalue}{$id}{$pkey}
if exists $oops->{oldvalue}{$id} && exists $oops->{oldvalue}{$id}{$pkey};
} else {
$oops->{oldvalue}{$id}{$pkey} = $atval;
}
$oops->{forcesave}{$id} = __LINE__
if $oops->{do_forcesave};
for my $i (keys %change_refs) {
print "*$id/$pkey update_attribute refchange summary for *$i: $qplusminus{$change_refs{$i}}\n" if $debug_refcount;
next unless $change_refs{$i};
$oops->refchange($id, $i, $change_refs{$i});
}
assertions($oops);
}
sub prepare_insert_attribute
{
my $oops = shift;
my $id = shift;
my $pkey = shift;
my $special_handling = shift;
my $atval;
my $ptype = '0';
if (ref($_[0])) {
$atval = $oops->get_object_id($_[0], $id);
print "*$id/$pkey is a reference to *$atval (preparing to save)\n" if $debug_save_attr_arraylen || $debug_write_ref;
$ptype = 'R';
$oops->refchange($id,$atval,1);
$oops->{oldobject}{$id}{$pkey} = $atval;
print "OLDOBJECT *$id/$pkey prepare_insert_attribute = *$atval\n" if $debug_oldobject;
print "in prepare_insert_attribute, ref to *$atval from *$id/$pkey is new (+1)\n" if $debug_refcount;
} elsif (defined($_[0]) && length($_[0]) > $bigcutoff && ! ($special_handling && $special_handling->{ref} && $pkey ne $nopkey)) {
$atval = $_[1] || bigcksum($_[0]);
$ptype = 'B';
$oops->{oldbig}{$id}{$pkey} = $atval;
print "*$id/$pkey is a big value\n" if $debug_save_attr_arraylen;
$oops->save_big($id, $pkey, $_[0]);
} else {
$atval = $_[0];
$oops->{oldvalue}{$id}{$pkey} = $atval;
print "*$id/$pkey is a normal value $qval{$atval}\n" if $debug_save_attr_arraylen;
}
$atval = '0' if defined($atval) && $atval eq '0'; # make sure it's a string
assertions($oops);
print "*$id/$pkey - new: $qval{$atval}\n" if $debug_save_attributes;
return ($atval, $ptype);
}
#
# We don't copy all of @_ because it may have BLOBs...
#
sub insert_attribute
{
my ($oops, $id, $pkey, $special_handling) = @_;
print Carp::longmess("DEBUG: insert_attribute(@_) called") if $debug_save_attr_context;
my ($atval, $ptype) = $oops->prepare_insert_attribute($id, $pkey, $special_handling, $_[4], $_[5]);
$atval = undef unless defined $atval;
my $sym = $typesymbol{reftype($oops->{cache}{$id})} if $debug_writes;
print "$sym$id/$pkey insert_attribute $qval{$atval} (ptype $ptype)\n" if $debug_writes;
$atval = '' if defined($atval) && $atval eq ''; # why does this line help?!?
my $saveattributeQ = $oops->query('saveattribute', execute => [ $id, $pkey, $atval, $ptype ]);
$oops->{forcesave}{$id} = __LINE__
if $oops->{do_forcesave};
no warnings;
print "*$id/$qval{$pkey} - '$atval'/$ptype inserted\n" if $debug_save_attributes;
assertions($oops);
}
sub delete_attribute
{
my $oops = shift;
my $id = shift;
my $pkey = shift;
my $sym;
$sym = $typesymbol{reftype($oops->{cache}{$id})} if $debug_writes;
print "$sym$id/$pkey delete_attribute\n" if $debug_writes;
my $oldvalue = shift;
my $oldover = exists $oops->{oldbig}{$id} && exists $oops->{oldbig}{$id}{$pkey};
$pkey = '0' if $pkey eq '0'; # make sure it's a string
my $deleteattributeQ = $oops->query('deleteattribute', execute => [ $id, $pkey ]);
if (ref($oldvalue)) {
my $oldid = $oops->get_object_id($oldvalue, $id);
$oops->refchange($id,$oldid,-1);
print "OLDOBJECT *$id/$pkey delete_attribute, = undef (was $oops->{oldobject}{$id}{$pkey})\n" if $debug_oldobject;
delete $oops->{oldobject}{$id}{$pkey};
print "in delete_attribute, ref to *$oldid from *$id/$pkey is invalid (-1)\n" if $debug_refcount;
} elsif (exists $oops->{oldobject}{$id} && exists $oops->{oldobject}{$id}{$pkey}) {
$oops->refchange($id, $oops->{oldobject}{$id}{$pkey}, -1);
print "in delete_attribute, ref to *$oops->{oldobject}{$id}{$pkey} from *$id/$pkey is dropped (-1)\n" if $debug_refcount;
print "OLDOBJECT *$id/$pkey delete_attribute2, = undef (was $oops->{oldobject}{$id}{$pkey})\n" if $debug_oldobject;
delete $oops->{oldobject}{$id}{$pkey};
}
if ($oldover) {
my $deletebigQ = $oops->query('deletebig', execute => [ $id, $pkey ]);
delete $oops->{oldbig}{$id}{$pkey};
}
print "*$id/$pkey - delete'\n" if $debug_save_attributes;
delete $oops->{oldvalue}{$id}{$pkey}
if exists $oops->{oldvalue}{$id} && exists $oops->{oldvalue}{$id}{$pkey};
print "*$id/$pkey delete_attribute3, oldobject *$id/$pkey = undef (was $oops->{oldobject}{$id}{$pkey})\n" if $debug_oldobject && exists $oops->{oldobject}{$id} && exists $oops->{oldobject}{$id}{$pkey};
delete $oops->{oldobject}{$id}{$pkey}
if exists $oops->{oldobject}{$id} && exists $oops->{oldobject}{$id}{$pkey};
$oops->{forcesave}{$id} = __LINE__
if $oops->{do_forcesave};
assertions($oops);
}
sub get_object_id
{
my ($oops, $obj, $sponsoring_id) = @_;
confess unless ref $oops;
confess unless blessed $oops;
confess unless $oops->isa('OOPS');
my $bt = reftype($obj);
my $mem = refaddr($obj);
my $found = $oops->{memory}{$mem};
print "lookup MEMORY($qval{$obj}) = $mem, memory{$mem} = $qval{$found}\n" if $debug_memory;
return $found if $found;
print Carp::longmess("DEBUG: get_object_id($obj) called ") if $debug_getobid_context;
my $gcgen = $sponsoring_id
? $oops->{gcgeneration}{$sponsoring_id}
: 0;
my $id = $oops->{dbo}->allocate_id();
#
# We save the object so that we don't have to worry about INSERT vs UPDATE
# in the rest of the code. Perhaps we could save the UPDATE by putting
# in better values now.
#
my $saveobjectQ = $oops->query('saveobject');
$saveobjectQ->execute($id, $id, "will be".ref($obj), '?', '?', '?', 0, -9999, $gcgen) || confess $saveobjectQ->errstr;
$id = $oops->{dbo}->post_new_object($id);
$oops->memory($obj, $id);
print "MEMORY $mem := $id in get_object_id\n" if $debug_memory;
$oops->{cache}{$id} = $obj;
print "*$id get_object_id cache := $qval{$obj}\n" if $debug_cache;
$oops->{class}{$id} = ref $obj;
$oops->{virtual}{$id} = '0';
$oops->{arraylen}{$id} = 0;
$oops->{reftarg}{$id} = '0';
$oops->{loadgroup}{$id} = $id;
$oops->{groupset}{$id}{$id} = 1;
$oops->{gcgeneration}{$id} = $gcgen;
printf "NEW *%d, gcgen = %d (from %s)\n", $id, $gcgen, ($sponsoring_id ? $sponsoring_id : "none") if $debug_gcgeneration;
#
# Together these will force a save. We don't use forcesave because
# forcesave is cleared at the beginning of save().
#
$oops->{refcount}{$id} = -1;
$oops->{refmore}{$id} = 1;
print "in get_object_id, *$id is new: count=-1, change=+1 (=0)\n" if $debug_refcount;
print "$typesymbol{$bt}$id created as new object: $obj\n" if $debug_writes || $debug_write_object;
$oops->{otype}{$id} = $perltype2otype{$bt} || confess "bt='$bt',obj=$obj";
my $x = $obj->isa('OOPS::Aware')
unless $typesymbol{ref($obj)};
$obj->object_id_assigned($id)
if $x;
#print "get_ob_id -> write $id\n";
if ($oops->{insave}) {
$oops->write_object($id, $sponsoring_id);
} else {
$oops->{objtouched}{$id} = 'new object';
}
$oops->{loaded}++;
assertions($oops);
return $id;
}
sub refchange
{
my ($oops, $from, $to, $change) = @_;
confess unless $to; # debug
confess unless defined $change; # debug
if ($change >= 0) {
$oops->{refmore}{$to} += $change;
} else {
$oops->{refless}{$to} += $change;
}
confess unless $from;
return if $change <= 0;
my $gc = $oops->{gcgeneration};
if (! $gc->{$to}) {
#
# New object, don't worry about it.
#
$gc->{$to} = $gc->{$from};
my $fg = $gc->{$from} ? $gc->{$from} : "none"; # debug
print "*$to new gcgen $fg from $from\n" if $debug_gcgeneration;
} elsif ($gc->{$from} && $gc->{$from} > $gc->{$to}) {
#
# We're in the middle of a GC pass. We're adding
# a link from something that has already been swept
# to something that has not been swept.
#
# Add it to the GC special-handling table.
#
print "GC: special handling from $from($gc->{$from}) -> $to($gc->{$to})... adding $to to special table\n" if $debug_gcgeneration;
my $checkQ = $oops->query('loadpkey', execute => [ $gc_overflow_id, $to ]) || confess $oops->errstr;
unless(my ($junk1, $junk2) = $checkQ->fetchrow_array()) {
$checkQ->finish();
my $setQ = $oops->query('saveattribute');
$setQ->execute(4, $to, '', '0') || confess $setQ->errstr;
$oops->{gcspillcount}++;
}
}
}
sub delete_object
{
my ($oops, $id) = @_;
print "*$id begin delete\n" if $debug_cache;
$oops->predelete_object($id);
$oops->query('postdelete1', execute => $id);
$oops->query('postdelete2', execute => $id);
$oops->{deleted}{$id} = 1;
print "*$id has been deleted\n" if $debug_cache;
assertions($oops);
}
#
# Object may or may not be loaded.
# Object row is not cleared.
#
sub predelete_object
{
my ($oops, $id) = @_;
print Carp::longmess("DEBUG: predelete_object(@_) called") if 0; # debug
unless (defined $oops->{reftarg}{$id}) {
my $objectinfoQ = $oops->query('objectinfo', execute => $id);
my (undef, $loadgroup, $class, $otype, $virtual, $reftarg, undef, $arraylen, $refs, $cntr, $gcgen) = $objectinfoQ->fetchrow_array();
confess unless $otype;
$objectinfoQ->finish();
if ($oops->{reftarg}{$id} = $reftarg) {
$oops->load_object($id);
}
}
if ($oops->{reftarg}{$id}) {
#
# This can cause calls to write_ref later in the commit
# process than normal -- during the reference counting stage
#
if ($oops->{otype}{$id} eq 'H') {
%{$oops->{cache}{$id}} = ();
} elsif ($oops->{otype}{$id} eq 'A') {
@{$oops->{cache}{$id}} = ();
} elsif ($oops->{otype}{$id} eq 'S') {
# nada
} else {
confess;
}
print "*$id searching for references to self\n" if $debug_refalias || $debug_reftarget;
my $reftargobjectQ = $oops->query('reftargobject', execute => $id);
my $refid;
my %done;
while (($refid) = $reftargobjectQ->fetchrow_array()) {
print "\%$id loading reference *$refid\n" if ($debug_refalias || $debug_reftarget) && ! exists $oops->{cache}{$refid};
unless (exists $oops->{cache}{$refid}) {
$oops->load_object($refid);
my $x = $oops->{cache}{$refid}; # force it to untie
}
print "*$id writing *$refid again\n" if $debug_reftarget || $debug_refalias;
push(@{$oops->{refstowrite}}, $refid);
$done{$refid} = 1;
}
if ($oops->{aliasdest}{$id}) {
for $refid (keys %{$oops->{aliasdest}{$id}}) {
push(@{$oops->{refstowrite}}, $refid)
unless $done{$refid};
}
}
}
$oops->query('predelete1', execute => $id);
$oops->query('predelete2', execute => $id);
my $objectreflistQ = $oops->query('objectreflist', execute => $id);
my $objid;
while (($objid) = $objectreflistQ->fetchrow_array) {
$oops->refchange($id, $objid, -1);
print "in predelete_object, $oops->{otype}{$id}*$id being deleted, no longer references $oops->{otype}{$objid}*$objid (-1)\n" if $debug_refcount;
}
assertions($oops);
}
sub load_big
{
my ($oops, $id, $pkey) = @_;
my $bigloadQ = $oops->query('bigload', execute => [ $id, $pkey ]);
print STDERR "BIGLOAD $id, '$pkey'\n" if $debug_bigstuff;
my ($val) = $bigloadQ->fetchrow_array();
$bigloadQ->finish();
confess "null big *$id/'$pkey'" if ! defined($val) || $val eq '';
assertions($oops);
return $val;
}
sub save_big
{
my $oops = shift;
my $id = shift;
my $pkey = shift;
print STDERR "BIGSAVE $id, '$pkey'\n" if $debug_bigstuff;
my $savebigQ = $oops->query('savebig');
$savebigQ->execute($id, $pkey, $_[0]) || confess;
}
sub update_big
{
my $oops = shift;
my $id = shift;
my $pkey = shift;
print STDERR "BIGUPDATE $id, '$pkey'\n" if $debug_bigstuff;
my $updatebigQ = $oops->query('updatebig');
$updatebigQ->execute($_[0], $id, $pkey) || confess $updatebigQ->errstr;
}
sub workaround27555
{
my $oops = shift;
print Carp::longmess("DEBUG: workaround27555 called") if $debug_27555_context;
my ($tiedaddr, $key) = tied_hash_reference($_[0]);
print "workaround27555($qaddr{\$_[0]}) no tied addr\n" if $debug_27555 && ! $tiedaddr;
return $_[0] unless $tiedaddr;
my $id = $oops->{memory}{$tiedaddr} || $oops->{new_memory}{$tiedaddr};
print "workaround27555($qaddr{\$_[0]}) addr $tiedaddr does not translate to id (key=$key)\n" if $debug_27555 && ! $id;
return $_[0] unless $id;
my $tied = tied %{$oops->{cache}{$id}};
confess unless $tied;
$_[0] = $tied->GETREF($key);
print "workaround27555($qaddr{\$_[0]}) references %*$id/'$key - replaced with GETREF\n" if $debug_27555;
return $_[0];
}
#
# The point of this is simply to prevent the reuse of refaddr()s.
# This has a bad side effect: if nothing else already prevented it,
# this will prevent DESTROY from being called.
#
sub setmem
{
my $oops = shift;
my $mem = shift;
my $a = refaddr($_[0]);
if ($_[1]) {
print "set \U$mem\E $qval{$_[0]} := $qmemval{$_[1]} at $caller{2}\n" if $debug_memory2;
$oops->{memcount}{$a}++
unless exists $oops->{$mem}{$a};
$oops->{$mem}{$a} = $_[1];
$oops->{memrefs}{$a} = \$_[0]
unless $_[1] == 1 || $a == refaddr($oops);
$oops->{memsetdebug}{$_[1]} = (caller(2))[2];
} else {
print "set \U$mem\E $qval{$_[0]} := undef at $caller{2}\n" if $debug_memory2;
$oops->{memcount}{$a}--
if exists $oops->{$mem}{$a};
delete $oops->{$mem}{$a};
unless ($oops->{memcount}{$a}) {
delete $oops->{memrefs}{$a};
}
}
}
sub memory
{
my $oops = shift;
$oops->setmem('memory', @_);
}
sub new_memory
{
my $oops = shift;
$oops->setmem('new_memory', @_);
}
#my ($oops, $ref, $id, $pkey) = @_;
sub memory2key
{
my $oops = shift;
if ($_[1]) {
$oops->setmem('memory2key', $_[0], [ $_[1], $_[2] ]);
} else {
$oops->setmem('memory2key', $_[0]);
}
}
sub new_memory2key
{
my $oops = shift;
if ($_[1]) {
$oops->setmem('new_memory2key', $_[0], [ $_[1], $_[2] ]);
} else {
$oops->setmem('new_memory2key', $_[0]);
}
}
sub END
{
$global_destruction = 1;
}
sub DESTROY
{
local($main::SIG{'__DIE__'}) = \&die_from_destroy;
print "OOPS::DESTROY called\n" if $debug_free_tied;
my $oops = shift;
print "# DESTROY $$'s OOPS $oops\n" if $debug_oops_instances && $oops->{dbo}->dbh;
#print STDERR "self = $oops\n";
my $cache = $oops->{cache} || {};
for my $id (keys %$cache) {
my $tied;
next unless defined $cache->{$id};
next unless ref $cache->{$id};
my $t = reftype($cache->{$id});
if ($t eq 'HASH') {
$tied = tied %{$cache->{$id}};
} elsif ($t eq 'ARRAY') {
$tied = tied @{$cache->{$id}};
} elsif ($t eq 'SCALAR' || $t eq 'REF') {
$tied = tied($cache->{$id}) || ref($cache->{$id}) ? tied ${$cache->{$id}} : undef;
} else {
confess "type($id) = '$t'";
}
#print "istied($id) = $tied\n";
next unless $tied;
next unless $tied =~ /^OOPS/;
print "Calling *$id->destroy $qval{$tied}\n" if $debug_free_tied;
$tied->destroy;
}
if ($oops->{dbo}) {
$oops->{dbo}->disconnect();
}
%$oops = ();
$oopses--;
assertions($oops);
print "DESTROY OOPS $oops [$oopses]\n" if $debug_free_tied;
delete $tiedvars{$oops} if $debug_tiedvars;
}
sub assertions
{
my $oops = shift;
if (0) {
if (exists($oops->{cache}) && defined($oops->{cache})) {
for my $id (keys %{$oops->{cache}}) {
confess "no otype for *$id" unless exists($oops->{otype}{$id}) && defined($oops->{otype}{$id});
}
}
}
# print "okay at ".(caller(0))[2]."\n";
}
#
# functions
#
# withing DESTROY methods, die doesn't do anything
sub die_from_destroy
{
print Carp::cluck;
kill -9, $$;
}
sub bigcksum
{
use Digest::MD5 qw(md5_base64);
confess if ref $_[0];
confess unless defined $_[0];
my $cksum = substr($_[0], 0, $bigcutoff-$cksumlength);
$cksum .= "(MD5:";
$cksum .= md5_base64($_[0]);
$cksum .= ")";
return $cksum;
}
#
# for references to tied hash keys, this will return
# the refaddr of the tie object and the hash key
#
sub tied_hash_reference
{
my ($ref) = @_;
local($@);
local $SIG{'__DIE__'};
return eval {
my $magic = svref_2object($ref)->MAGIC;
$magic = $magic->MOREMAGIC
while lc($magic->TYPE) ne 'p';
return (${$magic->OBJ->RV}, $magic->PTR->as_string);
};
}
#
# Get a slice w/o reading the entire thing.
#
sub walk_hash(\%@)
{
my $obj = shift;
my ($stride, $key) = @_;
die unless $stride >= 1;
my $tied = tied(%$obj);
if ($tied && $tied->can('WALK_HASH')) {
return $tied->WALK_HASH(@_);
}
my @ret;
for my $k (sort keys %$obj) {
if (@_ > 1 && defined($key)) {
next unless $k gt $key;
}
push(@ret, $k);
last if @ret >= $stride;
}
return @ret;
}
# - - - - - - - - - - -
{
#
# These can only untie themselves if they can find themselves in
# the array! We won't search 'cause that would probably waste a
# lot of time.
#
package OOPS::InArray;
#sub UNTIE
#{
# my $self = shift;
# print "\@$self->{id}"."->$self->{pkey} UNTIED\n" if $debug_untie;
#}
sub SAVE_SELF {1}
sub POST_SAVE {}
sub destroy
{
my $self = shift;
%$self = ();
}
sub DESTROY
{
my $self = shift;
print "DESTROY ".ref($self)." \%*$self->{id} $self\n" if $debug_free_tied || $debug_refarray;
delete $tiedvars{$self} if $debug_tiedvars;
}
sub STORE
{
my ($self, $pval) = @_;
print "\@$self->{id}"."->$self->{pkey} STORE '$pval'\n" if $debug_normalarray || $debug_refarray;
$self->{changed} = 1;
$self->{pval} = $pval;
no warnings;
my $a = $self->{oops}{cache}{$self->{id}};
if ($#$a >= $self->{pkey} && tied($a->[$self->{pkey}]) eq $self) {
untie $a->[$self->{pkey}];
}
$self->{oops}->assertions;
return $pval;
}
sub changed
{
my ($self, $pkey) = @_;
print "\@$self->{id}"."->$pkey was at $self->{pkey} and changed=$self->{changed}\n" if $debug_write_array;
return 1 unless $pkey eq $self->{pkey}; # there's room to make this go faster
$self->{oops}->assertions;
return $self->{changed};
}
}
# - - - - - - - - - - -
{
package OOPS::ObjectInArray;
use Scalar::Util qw(weaken);
use Carp qw(longmess);
our (@ISA) = ('OOPS::InArray');
sub TIESCALAR
{
my $pkg = shift;
my ($id, $pkey, $objectid, $oops) = @_;
my $self = {
id => $id,
pkey => $pkey,
objectid => $objectid,
oops => $oops
};
weaken $self->{oops};
bless $self, $pkg;
print "BLESSED $self at ".__LINE__."\n" if $debug_blessing;
print "CREATE ObjectflowInArray \%$id $self\n" if $debug_free_tied || $debug_refarray;
$tiedvars{$self} = "%$id ".longmess if $debug_tiedvars;
$self->{oops}->assertions;
return $self;
}
sub FETCH
{
my ($self) = shift;
return $self->{pval}
if exists $self->{pval};
print "\@$self->{id}"."->$self->{pkey} FETCH *$self->{objectid}\n" if $debug_normalarray || $debug_refarray;
my $oops = $self->{oops};
$self->{pval} = $oops->load_object($self->{objectid});
$oops->workaround27555($self->{pval});
no warnings;
my $a = $self->{oops}{cache}{$self->{id}};
if ($#$a >= $self->{pkey} && tied($a->[$self->{pkey}]) eq $self) {
untie $a->[$self->{pkey}];
$oops->workaround27555($a->[$self->{pkey}]);
}
$self->{oops}->assertions;
print "\@$self->{id}"."->$self->{pkey} FETCH *$self->{objectid} returns $qval{$self->{pval}}\n" if $debug_normalarray || $debug_refarray;
return $self->{pval};
}
}
# - - - - - - - - - - -
{
package OOPS::BigInArray;
use Scalar::Util qw(weaken);
use Carp qw(longmess);
our (@ISA) = ('OOPS::InArray');
sub TIESCALAR
{
my $pkg = shift;
my ($id, $pkey, $cksum, $oops) = @_;
my $self = {
id => $id,
pkey => $pkey,
cksum => $cksum,
oops => $oops
};
weaken $self->{oops};
print "CREATE BigInArray \%$id/$pkey $self\n" if $debug_free_tied || $debug_refarray;
$tiedvars{$self} = "%$id ".longmess if $debug_tiedvars;
$self->{oops}->assertions;
return bless $self, $pkg;
}
sub FETCH
{
my ($self) = shift;
return $self->{pval}
if exists $self->{pval};
$self->{pval} = $self->{oops}->load_big($self->{id}, $self->{pkey});
print "\@$self->{id}"."->$self->{pkey} FETCH '$self->{pval}'\n" if $debug_normalarray || $debug_refarray;
no warnings;
my $a = $self->{oops}{cache}{$self->{id}};
if ($#$a >= $self->{pkey} && tied($a->[$self->{pkey}]) eq $self) {
untie $a->[$self->{pkey}];
}
$self->{oops}->assertions;
return $self->{pval};
}
}
# - - - - - - - - - - -
{
package OOPS::RefAlias;
#
# RefAlias handles references to elements within other objects.
# \%foo{bar} and such.
#
use Scalar::Util qw(weaken refaddr reftype);
use Carp qw(confess longmess);
#
# If we point into an array then there is some chance that
# our situation has changed. We must untie ourself and return 1
# so that the normal reference writing code can handle it.
#
sub SAVE_SELF
{
my $self = shift;
my ($oops, $id, $objid, $objkey) = @$self;
return if $oops->{savedone}{$id}++;
return unless exists $oops->{cache}{$objid};
return unless reftype($oops->{cache}{$objid}) eq 'ARRAY';
print "SAVE_SELF RefAlias \%*$id $self\n" if $debug_refalias;
$self->FETCH;
return 1;
}
sub POST_SAVE {}
sub DESTROY
{
my $self = shift;
my ($oops, $id, $objid, $objkey) = @$self;
print "DESTROY RefAlias \%*$id $self\n" if $debug_free_tied || $debug_refarray;
delete $tiedvars{$self} if $debug_tiedvars;
}
sub TIESCALAR
{
my $pkg = shift;
my ($oops, $id, $refobid, $refobkey) = @_;
my $self = bless [ $oops, $id, $refobid, $refobkey ], $pkg;
weaken $self->[0];
print "CREATE RefAlias \%$id $self\n" if $debug_free_tied || $debug_refarray;
$tiedvars{$self} = "%$id ".longmess if $debug_tiedvars;
$oops->assertions;
return $self;
}
sub FETCH
{
my $self = shift;
my ($oops, $id, $objid, $objkey) = @$self;
print "\$*$id raFETCH *$objid/'$objkey' (will UNITE)\n" if $debug_refalias;
my $tied;
my $cache = $oops->{cache};
my $ref;
my $wa;
if (! exists $cache->{$objid}) {
print "\$*$id raFETCH loading object\n" if $debug_refalias;
$oops->load_object($objid) || confess;
}
my $type = reftype($oops->{cache}{$objid});
if ($type eq 'HASH') {
if (($tied = tied %{$cache->{$objid}})) {
$ref = $tied->GETREFORIG($objkey);
print "\$*$id raFETCH tied, using *$objid->GETREFORIG($qval{$objkey}): $qval{$ref}\n" if $debug_refalias;
} else {
confess "untied hash reference \$$id/$objid/$objkey";
# $ref = \$oops->{cache}{$objid}{$objkey};
}
} elsif ($type eq 'ARRAY') {
if ($tied = tied @{$cache->{$objid}}) {
confess "We don't support tied arrays yet";
} else {
$ref = $oops->{refcopy}{$objid}{$objkey} || confess;
print "\$*$id raFETCH from array, using refcopy: $qval{$ref}\n" if $debug_refalias;
}
} else {
confess "Refalias to '$type' isn't allowed";
}
untie $cache->{$id};
$oops->{unwatched}{$id} = 1;
$oops->{oldalias}{$id} = [ $objid, $objkey ];
$cache->{$id} = $ref;
print "*$id raFETCH cache := $qval{$ref}\n" if $debug_cache;
$oops->memory($ref, $id);
print "MEMORY $qval{$ref} = $id in raFETCH\n" if $debug_memory;
confess unless $ref;
print "\$*$id raFETCH *$objid/'$objkey' returns $qval{$ref}\n" if $debug_refalias;
return $ref;
}
sub STORE
{
confess "why could this happen?";
# my $self = shift;
# my $val = shift;
# my ($oops, $id, $objid, $objkey) = @$self;
# print "\$*$id raSTORE cache := $qval{$val} (was *$objid/$objkey)\n" if $debug_refalias || $debug_cache;
#
# my $cache = $oops->{cache};
# untie $cache->{$id};
# $cache->{$id} = $val;
#
# XXX why not unwatched or oldalias?
#my $r = $self->FETCH();
#$oops->{unwatched}{$id} = 1;
#$oops->{oldalias}{$id} = [ $objid, $objkey ];
#my $cache = $oops->{cache};
#untie ${$cache->{$id}};
#${$cache->{$id}} = $val;
}
}
# - - - - - - - - - - -
{
package OOPS::Ref;
use Scalar::Util qw(weaken);
use Carp qw(longmess confess);
sub SAVE_SELF {1}
sub POST_SAVE {}
sub DESTROY
{
my $self = shift;
my ($oops, $id, $val) = @$self;
print "DESTROY Ref \%*$id $self\n" if $debug_free_tied || $debug_refalias;
delete $tiedvars{$self} if $debug_tiedvars;
}
sub destroy {}
sub UNTIE
{
my $self = shift;
my ($oops, $id, $val) = @$self;
print "*$id UNTIE\n" if $debug_refalias || $debug_refobject;
$oops->{unwatched}{$id} = 1;
}
sub TIESCALAR
{
my $pkg = shift;
my $oops = shift;
my $self = bless [ $oops, @_ ], $pkg;
print "CREATE $pkg *$qval{$_[0]}/$qval{$_[1]}\n" if $debug_free_tied || $debug_refalias;
$tiedvars{$self} = "*$qval{$_[0]} ".longmess if $debug_tiedvars;
weaken $self->[0];
confess unless defined $oops;
$oops->assertions;
return $self;
}
}
# - - - - - - - - - - -
{
package OOPS::RefObject;
our (@ISA) = qw(OOPS::Ref);
sub FETCH
{
my $self = shift;
my ($oops, $id, $val, $suicide) = @$self;
if (@$self == 5) {
print "\$*id roFETCH overriden value (shouldn't happen), returning $qval{$suicide}\n" if $debug_refobject;
return $suicide;
}
untie ${$oops->{cache}{$id}};
$oops->{oldobject}{$id}{$nopkey} = $val;
print "OLDOBJECT *$id/$nopkey refobject = *$val (roFETCH)\n" if $debug_oldobject;
print "\$*$id roFETCH will return *$val and attempt UNTIE\n" if $debug_refobject;
$oops->{unwatched}{$id} = 1;
return $oops->load_object($val);
}
sub STORE
{
my $self = shift;
my ($oops, $id, $val, $suicide) = @$self;
untie ${$oops->{cache}{$id}};
print "\$*$id roSTORE $qval{$_[0]} (replacing *$val), attempt UNTIE\n" if $debug_refobject;
unless ($oops->{oldobject}{$id}{$nopkey}) {
print "OLDOBJECT *$id/$nopkey refobject = *$val (roSTORE)\n" if $debug_oldobject;
$oops->{oldobject}{$id}{$nopkey} = $val;
$oops->{unwatched}{$id} = 1;
}
$self->[4] = $_[0];
${$oops->{cache}{$id}} = shift;
untie ${$oops->{cache}{$id}};
if (@$self == 5) {
print "\$*id roSTORE overriden value (shouldn't happen), returning $qval{$suicide}\n" if $debug_refobject;
return $suicide;
}
return $val;
}
}
# - - - - - - - - - - -
{
package OOPS::RefBig;
our (@ISA) = qw(OOPS::Ref);
sub FETCH
{
my $self = shift;
my ($oops, $id, $val) = @$self;
untie ${$oops->{cache}{$id}};
$oops->{oldbig}{$id}{$nopkey} = $val;
return $oops->load_big($id, $nopkey);
}
sub STORE
{
my $self = shift;
my ($oops, $id, $val) = @$self;
untie ${$oops->{cache}{$id}};
$oops->{oldbig}{$id}{$nopkey} = $val;
${$oops->{cache}{$id}} = shift;
return $val;
}
}
# - - - - - - - - - - -
{
package OOPS::NormalHash;
use Scalar::Util qw(weaken reftype refaddr);
use Carp qw(confess longmess);
sub SAVE_SELF
{
my $self = shift;
my ($values, $ptypes, $added, $oops, $id, $vars) = @$self;
print "\%$id hSAVE_SELF\n" if $debug_normalhash;
$self->LOAD_SELF_REF() if $oops->{reftarg}{$id};
$oops->write_hash($values, $id, $ptypes, $added);
delete $oops->{demandwrite}{$id};
$oops->assertions;
return 0;
}
sub POST_SAVE
{
my $self = shift;
my ($values, $ptypes, $added, $oops, $id, $vars) = @$self;
delete $vars->{during_save};
}
sub destroy
{
my $self = shift;
my ($values, $ptypes, $added, $oops, $id, $vars) = @$self;
print "destroy NormalHash \%$id $self\n" if $debug_free_tied || $debug_normalhash;
%$ptypes = ();
%$added = ();
%$vars = ();
$oops->assertions if defined $oops;
}
#
# could this be an UNTIE sub intead? If so, would it get
# called too soon?
sub DESTROY
{
local($main::SIG{'__DIE__'}) = \&OOPS::die_from_destroy;
my $self = shift;
my ($values, $ptypes, $added, $oops, $id, $vars) = @$self;
delete $tiedvars{$self} if $debug_tiedvars;
return unless defined $oops; # it's a weak reference
return unless defined $oops->{cache}; # during destruction...
$self->preserve_ptypes;
confess if %$ptypes;
$oops->{oldvalue}{$id} = {}
unless exists $oops->{oldvalue}{$id};
my $ov = $oops->{oldvalue}{$id};
my $oo = $oops->{oldobject}{$id};
my $of = $oops->{oldbig}{$id};
for my $pkey (keys %$values) {
no warnings qw(uninitialized);
next if exists $added->{$pkey};
next if exists $ov->{$pkey};
next if $oo && exists $oo->{$pkey};
next if $of && exists $of->{$pkey};
$ov->{$pkey} = $values->{$pkey};
}
confess if tied %{$oops->{cache}{$id}};
untie(%{$oops->{cache}{$id}}); # Yes, this is required.
%{$oops->{cache}{$id}} = %$values;
$oops->{objtouched}{$id} = 'destroyed';
delete $oops->{demandwrite}{$id};
print "in NormalHash::DESTROY, *$id is touched -- \$oops is still valid\n" if $debug_touched;
print "DESTROY NormalHash \%*$id $self\n" if $debug_free_tied || $debug_normalhash;
delete $tiedvars{$self} if $debug_tiedvars;
# print "\%$id keys = ".join(' ',keys %{$oops->{cache}{$id}})."\n";
# print "\%$id oldvalues = ".join(' ',keys %{$oops->{oldvalue}{$id}})."\n";
# print "\%$id oldobject = ".join(' ',keys %{$oops->{oldobject}{$id}})."\n";
$oops->assertions;
}
# tie %{$cache->{$id}}, 'OOPS::NormalHash', $new{$id}, $newptype{$id}, $oops, $id;
sub TIEHASH
{
my $pkg = shift;
my ($values, $ptypes, $oops, $id) = @_;
my $self = bless [ $values, $ptypes, {}, $oops, $id, {} ], $pkg;
weaken $self->[3];
print "CREATE NormalHash \%$id $self\n" if $debug_free_tied || $debug_normalhash;
$tiedvars{$self} = "%$id ".longmess if $debug_tiedvars;
$oops->assertions;
return $self;
}
sub FETCH
{
my $self = shift;
my ($values, $ptypes, $added, $oops, $id, $vars) = @$self;
return undef unless defined $oops; # weak ref
my $pkey = shift;
no warnings qw(uninitialized);
print "\%$id/$pkey begin hFETCH\n" if $debug_normalhash;
if (exists $ptypes->{$pkey}) {
my $ot = $ptypes->{$pkey};
if ($ot eq 'R') {
print "OLDOBJECT *$id/$pkey hFETCH = *$values->{$pkey}\n" if $debug_oldobject;
$oops->{oldobject}{$id}{$pkey} = $values->{$pkey};
$values->{$pkey} = $oops->load_object($values->{$pkey});
$oops->workaround27555($values->{$pkey});
} elsif ($ot eq 'B') {
$oops->{oldbig}{$id}{$pkey} = $values->{$pkey};
$values->{$pkey} = $oops->load_big($id, $pkey);
} else {
confess;
}
delete $ptypes->{$pkey};
}
print "\%$id/$pkey hFETCH = $qval{$values->{$pkey}}\n" if $debug_normalhash;
confess if exists $ptypes->{$pkey} && tied $ptypes->{$pkey};
$oops->assertions;
return $values->{$pkey};
}
sub STORE
{
my $self = shift;
my ($pkey, $pval) = @_;
my ($values, $ptypes, $added, $oops, $id, $vars) = @$self;
return undef unless defined $oops; # weak ref
$oops->workaround27555($pval) if ref $pval;
no warnings qw(uninitialized);
if (exists $ptypes->{$pkey}) {
my $ot = $ptypes->{$pkey};
if ($ot eq 'R') {
print "*$id/$pkey hSTORE *$id/$pkey = *$values->{$pkey}\n" if $debug_oldobject;
$oops->{oldobject}{$id}{$pkey} = $values->{$pkey};
} elsif ($ot eq 'B') {
$oops->{oldbig}{$id}{$pkey} = $values->{$pkey};
} else {
confess;
}
print "%$id/$pkey hSTORE Oldvalue = $qval{$values->{$pkey}}\n" if $debug_normalhash;
$oops->{oldvalue}{$id}{$pkey} = $values->{$pkey};
delete $ptypes->{$pkey};
} else {
if (exists $oops->{oldvalue}{$id}{$pkey}) {
# nada
} elsif (exists($values->{$pkey}) && ! exists($added->{$pkey})) {
print "%$id/$pkey hSTORE oldvalue = $qval{$values->{$pkey}}\n" if $debug_normalhash;
$oops->{oldvalue}{$id}{$pkey} = $values->{$pkey};
} else {
no warnings;
$added->{$pkey} = 1;
}
}
$oops->{demandwrite}{$id} = 1;
print "\%$id/$pkey hSTORE = $qval{$pval} ($qval{$values->{$pkey}})\n" if $debug_normalhash;
$values->{$pkey} = $pval;
$oops->assertions;
}
sub DELETE
{
my $self = shift;
my $pkey = shift;
my ($values, $ptypes, $added, $oops, $id, $vars) = @$self;
{ no warnings; print "\%$id/$pkey hDELETE ($values->{$pkey})\n" if $debug_normalhash; }
no warnings qw(uninitialized);
if (exists $values->{$pkey}) {
if (exists $vars->{keyrefs}{$pkey}) {
my $ref = $vars->{keyrefs}{$pkey};
my $addr = refaddr($ref);
unless (exists $added->{$pkey} || exists $vars->{deleted}{$pkey} || exists $vars->{alldelete}) {
print "%*$id/'$pkey' hDELETE preserve $addr ($ref) in original_refs\n" if $debug_memory || $debug_refalias;
confess if $vars->{original_reference}{$pkey};
$vars->{original_reference}{$pkey} = $ref
}
print "%*$id/'$pkey' hDELETE MEMORY2KEY($addr) := undef ($ref)\n" if $debug_memory || $debug_refalias;
$oops->memory2key($ref);
delete $vars->{keyrefs}{$pkey};
}
if (exists $added->{$pkey}) {
# nada
} else {
if (exists $ptypes->{$pkey}) {
my $ot = $ptypes->{$pkey};
if ($ot eq 'R') {
print "OLDOBJECT *$id/$pkey hDELETE = *$values->{$pkey}\n" if $debug_oldobject;
$oops->{oldobject}{$id}{$pkey} = $values->{$pkey};
} elsif ($ot eq 'B') {
$oops->{oldbig}{$id}{$pkey} = $values->{$pkey};
} else {
confess;
}
print "%$id/$pkey hDELETE Oldvalue = $qval{$values->{$pkey}}\n" if $debug_normalhash;
$oops->{oldvalue}{$id}{$pkey} = $values->{$pkey};
delete $ptypes->{$pkey};
} elsif (! exists($oops->{oldvalue}{$id}{$pkey}) && ! exists $added->{$pkey}) {
print "%$id/$pkey hDELETE oldvalue = $qval{$values->{$pkey}}\n" if $debug_normalhash;
$oops->{oldvalue}{$id}{$pkey} = $values->{$pkey};
}
unless (exists($vars->{deleted}{$pkey}) || exists($vars->{alldelete})) {
# first time it's deleted
$vars->{deleted}{$pkey} = $values->{$pkey};
}
}
delete $values->{$pkey};
}
$oops->{demandwrite}{$id} = 1;
$oops->assertions;
}
sub CLEAR
{
my $self = shift;
my ($values, $ptypes, $added, $oops, $id, $vars) = @$self;
return unless defined $oops; # weak ref
print "\%$id hCLEAR\n" if $debug_normalhash;
$self->preserve_ptypes;
confess if %$ptypes;
if ($vars->{keyrefs}) {
for my $pkey (keys %{$vars->{keyrefs}}) {
no warnings qw(uninitialized);
next unless $vars->{keyrefs}{$pkey};
my $ref = $vars->{keyrefs}{$pkey};
my $addr = refaddr($ref);
print "%*$id/'$pkey' hCLEAR MEMORY2KEY($addr) := undef ($ref)\n" if $debug_memory || $debug_refalias;
$oops->memory2key($ref);
unless (exists $added->{$pkey} || exists $vars->{deleted}{$pkey} || exists $vars->{alldelete}) {
print "%*$id/'$pkey' hCLEAR preserve $addr ($ref) in original_refs\n" if $debug_memory || $debug_refalias;
confess if $vars->{original_reference}{$pkey};
$vars->{original_reference}{$pkey} = $ref
}
}
delete $vars->{keyrefs};
}
if (exists $vars->{alldelete}) {
%$values = ();
} else {
delete @{$values}{keys %$added};
$vars->{alldelete} = $self->[0];
$self->[0] = {};
}
delete $vars->{deleted};
%$added = ();
$oops->{demandwrite}{$id} = 1;
$oops->assertions;
}
sub GETREFORIG
{
my $self = shift;
my $pkey = shift;
my ($values, $ptypes, $added, $oops, $id, $vars) = @$self;
no warnings qw(uninitialized);
if (exists($vars->{alldelete}) || exists($vars->{deleted}{$pkey})) {
$self->LOAD_SELF_REF() unless $vars->{ref_to_self_loaded};
print "%*$id/$pkey hGETREFORIG returning cached original $qaddr{$vars->{original_reference}{$pkey}} ($vars->{original_reference}{$pkey})\n" if $debug_refalias && exists $vars->{original_reference}{$pkey};
return $vars->{original_reference}{$pkey}
if exists $vars->{original_reference}{$pkey};
my $pval;
$vars->{during_save}{oldvalue} = %{$oops->{oldvalue}{$id}};
if (exists $oops->{oldobject}{$id}{$pkey}) {
$pval = $oops->load_object($oops->{oldobject}{$id}{$pkey});
$oops->workaround27555($pval);
print "%*$id/$pkey hGETREFORIG from loadobject $oops->{oldobject}{$id}{$pkey}\n" if $debug_refalias;
} elsif (exists $oops->{oldbig}{$id}{$pkey}) {
$pval = $oops->load_big($id, $pkey);
print "%*$id/$pkey hGETREFORIG from loadbig\n" if $debug_refalias;
} elsif (exists $oops->{oldvalue}{$id}{$pkey}) {
$pval = $oops->{oldvalue}{$id}{$pkey};
print "%*$id/$pkey hGETREFORIG from oldvalue\n" if $debug_refalias;
} elsif (exists $vars->{alldelete} && exists $vars->{alldelete}{$pkey}) {
print "%*$id/$pkey hGETREFORIG from CLEARed value\n" if $debug_refalias;
} else {
print "%*$id/$pkey hGETREFORIG no prior value\n" if $debug_refalias;
$pval = undef;
}
my $ref = \$pval;
print "%*$id/$pkey hGETREFORIG original $qval{$pval} $qaddr{$ref} ($ref)\n" if $debug_refalias;
$vars->{original_reference}{$pkey} = $ref;
return $ref;
}
print "%*$id/$pkey hGETREFORIG returning NEW reference\n" if $debug_refalias;
return $self->GETREF($pkey);
}
#
# This should be a normal tie method but it isn't so we depend on it's
# being called by workaround27555
#
sub GETREF
{
my $self = shift;
my $pkey = shift;
my ($values, $ptypes, $added, $oops, $id, $vars) = @$self;
$self->STORE($pkey, $self->FETCH($pkey));
no warnings qw(uninitialized);
confess unless exists $values->{$pkey};
$self->LOAD_SELF_REF() unless $vars->{ref_to_self_loaded};
my $ref = \$values->{$pkey};
$vars->{keyrefs}{$pkey} = $ref;
$oops->memory2key($ref, $id, $pkey);
$oops->{demandwrite}{$id}++;
print "%*$id/'$pkey' hGETREF MEMORY2KEY $qval{$ref} := *$id/$pkey (ref to: $qval{$values->{$pkey}})\n" if $debug_memory || $debug_refalias;
return $ref;
}
sub LOAD_SELF_REF
{
my $self = shift;
my ($values, $ptypes, $added, $oops, $id, $vars) = @$self;
if ($vars->{ref_to_self_loaded}) {
print "%*$id hLOAD_SELF_REF - already done\n" if $debug_refalias && $debug_normalhash;
return
}
$vars->{ref_to_self_loaded} = 1; # early in function to prevent re-entrency
print "\%$id searching for references to keys\n" if $debug_refalias || $debug_normalhash;
my $reftargobjectQ = $oops->query('reftargobject', execute => $id);
my $refid;
#
# When a hash key is deleted, any references to the hash value become
# independent from the original hash. We have to have these referneces
# in-memory so that we can sort this out.
#
while (($refid) = $reftargobjectQ->fetchrow_array()) {
print "\%$id loading reference *$refid\n" if $debug_refalias || $debug_normalhash;
unless (exists $oops->{cache}{$refid}) {
$oops->load_object($refid);
my $x = $oops->{cache}{$refid}; # force untie
}
}
print "%*$id hLOAD_SELF_REF - complete\n" if $vars->{ref_to_self_loaded} && $debug_refalias && $debug_normalhash;
}
sub preserve_ptypes
{
my $self = shift;
my ($values, $ptypes, $added, $oops, $id, $vars) = @$self;
return unless defined $oops; # weak ref
for my $pkey (keys %$values) {
no warnings qw(uninitialized);
if (exists $ptypes->{$pkey}) {
my $ot = $ptypes->{$pkey};
if ($ot eq 'R') {
print "OLDOBJECT *$id/$pkey hPreserve_ptypes = *$values->{$pkey}\n" if $debug_oldobject;
$oops->{oldobject}{$id}{$pkey} = $values->{$pkey};
} elsif ($ot eq 'B') {
$oops->{oldbig}{$id}{$pkey} = $values->{$pkey};
} else {
confess;
}
print "%$id/$pkey hCLEAR oldvalue = $qval{$values->{$pkey}}\n" if $debug_normalhash;
$oops->{oldvalue}{$id}{$pkey} = $values->{$pkey};
delete $ptypes->{$pkey};
} elsif (exists $added->{$pkey}) {
# nada
} elsif (! exists $oops->{oldvalue}{$id}{$pkey}) {
print "%$id/$pkey hCLEAR oldvalue = $qval{$values->{$pkey}}\n" if $debug_normalhash;
$oops->{oldvalue}{$id}{$pkey} = $values->{$pkey};
}
}
$oops->assertions;
}
sub EXISTS
{
my $self = shift;
my ($values, $ptypes, $added, $oops, $id, $vars) = @$self;
my $pkey = shift;
no warnings qw(uninitialized);
print "\%$id/$pkey hEXISTS? = ".(exists($values->{$pkey}) ? "YES" : "NO")."\n" if $debug_normalhash;
$oops->assertions;
return exists $values->{$pkey};
}
sub FIRSTKEY
{
my $self = shift;
my ($values, $ptypes, $added, $oops, $id, $vars) = @$self;
confess if tied $ptypes;
my $t = tied %$ptypes;
$vars->{ineach} = 1;
keys %$values;
print "\%$id hFIRSTKEY\n" if $debug_normalhash;
$oops->assertions if $oops;
return $self->NEXTKEY();
}
sub NEXTKEY
{
my $self = shift;
my ($values, $ptypes, $added, $oops, $id, $vars) = @$self;
my ($pkey, $pval) = each(%$values);
if (defined $pkey) {
no warnings qw(uninitialized);
confess if exists $ptypes->{$pkey} && tied $ptypes->{$pkey};
print "\%$id hNEXTKEY = ".$qval{$pkey}."\n" if $debug_normalhash;
} else {
delete $vars->{ineach};
print "\%$id hNEXTKEY = undef\n" if $debug_normalhash;
}
$oops->assertions if $oops;
return $pkey;
}
sub SCALAR
{
my $self = shift;
my ($values, $ptypes, $added, $oops, $id, $vars) = @$self;
return scalar(keys(%$values));
}
}
# - - - - - - - - - - -
{
package OOPS::DemandHash;
use Carp qw(confess longmess croak);
use Scalar::Util qw(weaken refaddr);
#
# $oops - OOPS object to use
# $id - persistant object id
# $rcache - read cache
# $wcache - write cache
# $necache - non-exists cache
# $dcache - deleted cache
# $ovcache - old values cache
# $vars - {
# dbseach - each() database cursor
# alldelete - everything has been deleted at least once
# }
#
sub SAVE_SELF
{
my $self = shift;
my ($oops, $id, $rcache, $wcache, $necache, $ovcache, $dcache, $vars) = @$self;
printf "%%%s SAVE_SELF dcache=%s, wcache=%s\n", $id, join('/',keys %$dcache), join('/',keys %$wcache) if $debug_virtual_delete || $debug_virtual_save;
return unless %$wcache || %$dcache || $vars->{alldelete};
if ($vars->{alldelete}) {
print "%$id alldelete\n" if $debug_virtual_save;
$oops->predelete_object($id); # doesn't clear object row.
$oops->{forcesave}{$id} = __LINE__
if $oops->{do_forcesave};
$oops->query('postdeleteV', execute => $id);
$self->LOAD_SELF_REF() if $oops->{reftarg}{$id};
} elsif (%$dcache || %$wcache) {
my %done;
for my $pkey (keys %$dcache, keys %$wcache) {
no warnings qw(uninitialized);
confess if $done{$pkey}++;
my ($pval, $ptype);
if (exists $ovcache->{$pkey}) {
($pval, $ptype) = @{$ovcache->{$pkey}};
print "%$id/'$pkey' - old value is cached ('$pval', $ptype)\n" if $debug_virtual_save;
} elsif (exists $necache->{$pkey}) {
print "%$id/'$pkey' - old value known to be absent\n" if $debug_virtual_save;
next;
} else {
print "%$id/'$pkey' - checking old pval in virtual SAVE_SELF\n" if $debug_virtual_delete || $debug_virtual_save;
my $loadpkeyQ = $oops->query('loadpkey', execute => [ $id, $pkey ]);
if (($pval, $ptype) = $loadpkeyQ->fetchrow_array) {
$loadpkeyQ->finish();
$ovcache->{$pkey} = [ $pval, $ptype ];
} else {
# no old value
}
}
if (! $ptype) {
# nothing
} elsif ($ptype eq 'R') {
print "%$id/'$pkey' - old value was a reference (*$pval)\n" if $debug_virtual_delete || $debug_virtual_save || $debug_refcount;
$oops->refchange($id, $pval, -1);
print "in demandhash save-self, V%$id reference to $oops->{otype}{$pval}*$pval gone (-1)\n" if $debug_refcount;
} elsif ($ptype eq 'B') {
print "%$id/'$pkey' - old value was big\n" if $debug_virtual_delete || $debug_virtual_save;
$oops->query('deletebig', execute => [ $id, $pkey ]);
} else {
confess;
}
$self->LOAD_SELF_REF($pkey) if exists $dcache->{$pkey} && $oops->{reftarg}{$id};
}
}
if (%$dcache && ! $vars->{alldelete}) {
for my $pkey (keys %$dcache) {
no warnings qw(uninitialized);
print "%$id/'$pkey' - commit virtual delete (SAVE_SELF)\n" if $debug_virtual_delete || $debug_virtual_save;
$oops->query('deleteattribute', execute => [ $id, $pkey ]);
}
}
if (%$wcache) {
my $saveattributeQ = $oops->query('saveattribute');
for my $pkey (keys %$wcache) {
no warnings qw(uninitialized);
# print "%$id/'$pkey' - no change in value\n" if $debug_virtual_save && exists $rcache->{$pkey} && $rcache->{$pkey} eq $wcache->{$pkey} && defined($rcache->{$pkey}) eq defined($wcache->{$pkey}) && ref($rcache->{$pkey}) eq ref($wcache->{$pkey});
# next if exists $rcache->{$pkey}
# && $rcache->{$pkey} eq $wcache->{$pkey}
# && defined($rcache->{$pkey}) eq defined($wcache->{$pkey})
# && ref($rcache->{$pkey}) eq ref($wcache->{$pkey});
if (exists($ovcache->{$pkey}) && ! $vars->{alldelete}) {
my ($atval, $ptype) = $oops->prepare_insert_attribute($id, $pkey, undef, $wcache->{$pkey}, undef);
#print "pkey=$pkey atval=$atval\n";
print "%$id/'$pkey' - replacement value ('$atval', $ptype [was @{$ovcache->{$pkey}}])\n" if $debug_virtual_save;
$oops->query('updateattribute', execute => [ $atval, $ptype, $id, $pkey ]);
} else {
my ($atval, $ptype) = $oops->prepare_insert_attribute($id, $pkey, undef, $wcache->{$pkey}, undef);
print "%$id/'$pkey' - new value ('$atval', $ptype)\n" if $debug_virtual_save;
$oops->query('saveattribute', execute => [ $id, $pkey, $atval, $ptype ]);
}
$vars->{new_rcache}{$pkey} = $wcache->{$pkey};
}
}
$oops->assertions;
return 0;
}
sub POST_SAVE
{
my $self = shift;
my ($oops, $id, $rcache, $wcache, $necache, $ovcache, $dcache, $vars) = @$self;
print "%*$id POST_SAVE\n" if $debug_virtual_save;
if ($vars->{alldelete}) {
delete $vars->{original_reference};
%$ovcache = ();
} elsif (%$dcache) {
delete @{$vars->{original_reference}}{keys %$dcache};
delete @{$ovcache}{keys %$dcache};
}
$self->[2] = $vars->{new_rcache} || {};
%$dcache = ();
%$wcache = ();
delete $vars->{alldelete};
delete $oops->{demandwrite}{$id};
delete $vars->{has_been_deleted};
}
sub destroy
{
my $self = shift;
my ($oops, $id, $rcache, $wcache, $necache, $ovcache, $dcache, $vars) = @$self;
%$rcache = ();
%$wcache = ();
%$necache = ();
%$ovcache = ();
%$dcache = ();
%$vars = ();
delete $tiedvars{$self} if $debug_tiedvars;
$oops->assertions if $oops; # tied var
}
sub DESTROY
{
local($main::SIG{'__DIE__'}) = \&OOPS::die_from_destroy;
my $self = shift;
my ($oops, $id, $rcache, $wcache, $necache, $ovcache, $dcache, $vars) = @$self;
print "DESTROY DemandHash \%$id $self\n" if $debug_free_tied;
delete $tiedvars{$self} if $debug_tiedvars;
$oops->assertions if defined $oops; # weak reference
}
sub TIEHASH
{
my ($pkg, $oops, $id) = @_;
my $self = bless [ $oops, $id, {}, {}, {}, {}, {}, {} ], $pkg;
weaken $self->[0];
push(@{$oops->{vcache}}, $self);
print "CREATE DemandHash \%$id $self\n" if $debug_free_tied;
$tiedvars{$self} = "%$id ".longmess if $debug_tiedvars;
$oops->assertions;
return $self;
}
sub FETCH
{
my ($self, $pkey) = @_;
my ($oops, $id, $rcache, $wcache, $necache, $ovcache, $dcache, $vars) = @$self;
return undef unless defined $oops; # weak ref
no warnings qw(uninitialized);
if (exists $dcache->{$pkey}) {
print "%*$id/'$pkey' vFETCH: undef - in dcache\n" if $debug_virtual_hash;
return undef ;
}
if (exists $wcache->{$pkey}) {
print "%*$id/'$pkey' vFETCH: $qval{$wcache->{$pkey}} - in wcache\n" if $debug_virtual_hash;
return $wcache->{$pkey};
}
if (exists $rcache->{$pkey}) {
print "%*$id/'$pkey' vFETCH: $qval{$rcache->{$pkey}} - in rcache\n" if $debug_virtual_hash;
return $rcache->{$pkey};
}
my $val;
if ($vars->{alldelete}) {
print "%*$id/'$pkey' vFETCH: undef - alldelete\n" if $debug_virtual_hash;
$val = undef;
} else {
$val = $self->ORIGINAL_VALUE($pkey);
if (exists $wcache->{$pkey}) {
#
# Override bad value in wcache when reanimating $x{y} = \$x{y};
#
print "%*$id/$pkey vFETCH storing original value in WCACHE: $qval{$val}\n" if $debug_virtual_hash || $debug_refalias;
$wcache->{$pkey} = $val;
} else {
print "%*$id/$pkey vFETCH original value: $qval{$val}\n" if $debug_virtual_hash;
$rcache->{$pkey} = $val;
}
}
$oops->assertions;
print Carp::longmess("DEBUG: vFETCH(@_) returning") if 0; # debug
return $val;
}
sub EXISTS
{
my ($self, $pkey) = @_;
my ($oops, $id, $rcache, $wcache, $necache, $ovcache, $dcache, $vars) = @$self;
return undef unless defined $oops; # weak ref
no warnings qw(uninitialized);
print "%*$id/'$pkey' vEXISTS: 0 - dcache\n" if $debug_virtual_hash && exists $dcache->{$pkey};
return 0 if exists $dcache->{$pkey};
print "%*$id/'$pkey' vEXISTS: 1 - rcache\n" if $debug_virtual_hash && exists $rcache->{$pkey};
print "%*$id/'$pkey' vEXISTS: 1 - wcache\n" if $debug_virtual_hash && exists $wcache->{$pkey};
print "%*$id/'$pkey' vEXISTS: 1 - ovcache\n" if $debug_virtual_hash && exists $ovcache->{$pkey};
return 1 if exists $rcache->{$pkey} || exists $wcache->{$pkey} || exists $ovcache->{$pkey};
print "%*$id/'$pkey' vEXISTS: 0 - necache\n" if $debug_virtual_hash && exists $necache->{$pkey};
return 0 if exists $necache->{$pkey};
print "%*$id/'$pkey' vEXISTS: 0 - alldelete\n" if $debug_virtual_hash && $vars->{alldelete};
return 0 if $vars->{alldelete};
my ($pval, $ptype);
my $loadpkeyQ = $oops->query('loadpkey', execute => [ $id, $pkey ]);
if (($pval, $ptype) = $loadpkeyQ->fetchrow_array) {
$loadpkeyQ->finish();
if ($ptype) {
$ovcache->{$pkey} = [ $pval, $ptype ];
} else {
$rcache->{$pkey} = $pval;
}
print "%*$id/'$pkey' vEXISTS: 0 - found in db\n" if $debug_virtual_hash;
return 1;
} else {
$necache->{$pkey} = 1;
print "%*$id/'$pkey' vEXISTS: 0 - not found in db\n" if $debug_virtual_hash;
return 0;
}
$oops->assertions;
}
sub ORIGINAL_PTYPE
{
my ($self, $pkey) = @_;
my ($oops, $id, $rcache, $wcache, $necache, $ovcache, $dcache, $vars) = @$self;
no warnings qw(uninitialized);
if (exists $ovcache->{$pkey}) {
print "%$id/$pkey vORIGINAL_PTYPE ovcache: @{$ovcache->{$pkey}}\n" if $debug_virtual_ovals;
return @{$ovcache->{$pkey}};
} else {
my ($pval, $ptype);
my $loadpkeyQ = $oops->query('loadpkey', execute => [ $id, $pkey ]);
my $found = ($pval, $ptype) = $loadpkeyQ->fetchrow_array;
$loadpkeyQ->finish();
print "%$id/$pkey vORIGINAL_PTYPE none found\n" if $debug_virtual_ovals && ! $found;
return () unless $found;
$ovcache->{$pkey} = [ $pval, $ptype ]
if $ptype;
print "%$id/$pkey vORIGINAL_PTYPE lookup: $qval{$pval}/$ptype\n" if $debug_virtual_ovals;
return ($pval, $ptype);
}
}
sub ORIGINAL_VALUE
{
my ($self, $pkey) = @_;
my ($oops, $id, $rcache, $wcache, $necache, $ovcache, $dcache, $vars) = @$self;
my ($pval, $ptype) = $self->ORIGINAL_PTYPE($pkey);
if (! defined $ptype) {
confess if defined $pval;
} elsif ($ptype eq 'B') {
print "%*$id/'$pkey' is big\n" if $debug_virtual_hash;
$pval = $oops->load_big($id, $pkey);
} elsif ($ptype eq 'R') {
my $ov = $pval if $debug_virtual_hash;
$pval = $oops->load_object($pval);
print "%*$id/'$pkey' is object: *$ov: $qval{$pval}\n" if $debug_virtual_hash;
#
# possible side effects of load_object() include another call
# to FETCH.
#
} elsif ($ptype ne '0') {
confess;
}
no warnings qw(uninitialized);
print "%*$id/$pkey vORIGINAL_VALUE = $qval{$pval}\n" if $debug_virtual_ovals;
return $pval;
}
sub STORE
{
my ($self, $pkey, $pval) = @_;
my ($oops, $id, $rcache, $wcache, $necache, $ovcache, $dcache, $vars) = @$self;
return undef unless defined $oops; # weak ref
$oops->workaround27555($pval) if ref $pval;
no warnings qw(uninitialized);
$wcache->{$pkey} = $pval;
$vars->{has_been_deleted}{$pkey} = 1 if $dcache->{$pkey};
delete $dcache->{$pkey};
delete $necache->{$pkey};
delete $rcache->{$pkey};
$oops->{demandwrite}{$id}++;
$oops->assertions;
print "%*$id/'$pkey' vSTORE into $qval{$qmakeref{$wcache->{$pkey}}}\n" if $debug_refalias;
print "%*$id/'$pkey' vSTORE: $qval{$pval}\n" if $debug_virtual_hash;
return $pval;
}
sub DELETE
{
my ($self, $pkey) = @_;
my ($oops, $id, $rcache, $wcache, $necache, $ovcache, $dcache, $vars) = @$self;
no warnings qw(uninitialized);
my $x = exists $wcache->{$pkey}
? $wcache->{$pkey}
: $rcache->{$pkey};
$dcache->{$pkey} = 1; # xxx set to $x?
if ($oops->{reftarg}{$id}
&& ! $vars->{alldelete}
&& ! exists $vars->{original_reference}{$pkey}
&& (defined($x) || exists $wcache->{$pkey} || exists $rcache->{$pkey})
&& ! exists $vars->{has_been_deleted}{$pkey})
{
if ($vars->{keyrefs}{$pkey}) {
print "%$id/'$pkey' vDELETE orignal_reference copy from keyrefs $qaddr{$vars->{keyrefs}{$pkey}} ($vars->{keyrefs}{$pkey})\n" if $debug_refalias;
$vars->{original_reference}{$pkey} = $vars->{keyrefs}{$pkey};
} else {
my $ref = \$x;
print "%$id/'$pkey' vDELETE orignal_reference copy from keyrefs $qaddr{$ref} ($ref)\n" if $debug_refalias;
$vars->{original_reference}{$pkey} = ref;
}
}
if ($vars->{keyrefs}{$pkey}) {
my $addr = refaddr($vars->{keyrefs}{$pkey});
print "%*$id/'$pkey' vDELETE MEMORY2KEY($addr) := undef\n" if $debug_memory || $debug_refalias;
$oops->memory2key($vars->{keyrefs}{$pkey});
}
delete $vars->{keyrefs}{$pkey};
delete $wcache->{$pkey};
delete $rcache->{$pkey};
$oops->{demandwrite}{$id}++;
print "%$id/'$pkey' - vDELETE\n" if $debug_virtual_delete || $debug_virtual_hash;
$oops->assertions;
return $x;
}
sub CLEAR
{
my ($self) = @_;
my ($oops, $id, $rcache, $wcache, $necache, $ovcache, $dcache, $vars) = @$self;
return () unless defined $oops; # weak ref
if ($vars->{alldelete}) {
%$wcache = ();
} else {
delete @$wcache{keys %{$vars->{has_been_deleted}}};
$vars->{pre_clear_wcache} = $wcache;
if ($vars->{keyrefs}) {
for my $pkey (keys %{$vars->{keyrefs}}) {
no warnings qw(uninitialized);
next if exists $vars->{original_reference}{$pkey};
next if exists $dcache->{$pkey} || exists $vars->{has_been_deleted}{$pkey};
next unless exists $rcache->{$pkey} || ((undef, undef) = $self->ORIGINAL_PTYPE($pkey));
print "%$id/'$pkey' vCLEAR orignal_reference copy from keyrefs $qaddr{$vars->{keyrefs}{$pkey}} ($vars->{keyrefs}{$pkey})\n" if $debug_refalias;
$vars->{original_reference}{$pkey} = $vars->{keyrefs}{$pkey};
}
}
$self->[3] = {};
}
if ($vars->{keyrefs}) {
for my $pkey (keys %{$vars->{keyrefs}}) {
no warnings qw(uninitialized);
my $ref = $vars->{keyrefs}{$pkey};
my $addr = refaddr($ref);
print "%*$id/'$pkey' vCLEAR MEMORY2KEY($addr) := undef\n" if $debug_memory || $debug_refalias;
$oops->memory2key($ref);
}
delete $vars->{keyrefs};
}
delete $vars->{keyrefs};
%$rcache = ();
%$necache = ();
%$ovcache = ();
%$dcache = ();
$vars->{alldelete} += 1;
$oops->{demandwrite}{$id}++;
$oops->assertions;
print "%*$id vCLEAR\n" if $debug_virtual_hash;
return ();
}
sub GETREFORIG
{
my ($self, $pkey) = @_;
my ($oops, $id, $rcache, $wcache, $necache, $ovcache, $dcache, $vars) = @$self;
no warnings qw(uninitialized);
if (exists $dcache->{$pkey} || $vars->{alldelete} || exists $vars->{has_been_deleted}{$pkey}) {
$self->LOAD_SELF_REF($pkey);
if (exists $vars->{original_reference}{$pkey}) {
print "%*$id/$pkey GETREFORIG cached-answer $qaddr{$vars->{original_reference}{$pkey}} ($vars->{original_reference}{$pkey})\n" if $debug_refalias;
return $vars->{original_reference}{$pkey};
}
#
# If there has been a delete then we want a reference to the orignal value.
# This reference must be shared between references.
#
my $pval;
if (exists $vars->{pre_clear_wcache}{$pkey} && ((undef, undef) = $self->ORIGINAL_PTYPE($pkey))) {
$pval = $vars->{pre_clear_wcache}{$pkey};
print "%*$id/$pkey GETREFORIG pre-clear-wcache $qval{$pval}\n" if $debug_refalias;
} else {
$pval = $self->ORIGINAL_VALUE($pkey);
print "%*$id/$pkey GETREFORIG original-value $qval{$pval}\n" if $debug_refalias;
}
my $ref = \$pval;
print "%*$id/$pkey GETREFORIG new-answer $qaddr{$ref} ($ref)\n" if $debug_refalias;
return ($vars->{original_reference}{$pkey} = $ref);
}
print "%*$id/$pkey GETREFORIG returning GETREF\n" if $debug_refalias;
return $self->GETREF($pkey);
}
#
# This should be a normal tie method but it isn't so we depend on it's
# being called by workaround27555.
#
# The ordering of this is important: we pre-compute the return reference before
# we figure out what the reference is to. Subsequent calls can return before
# we are done.
#
sub GETREF
{
my $self = shift;
my $pkey = shift;
my ($oops, $id, $rcache, $wcache, $necache, $ovcache, $dcache, $vars) = @$self;
no warnings qw(uninitialized);
$self->STORE($pkey, undef) unless $self->EXISTS($pkey);
my $wcache_already = exists $wcache->{$pkey};
my $ref = \$wcache->{$pkey};
$vars->{keyrefs}{$pkey} = $ref;
$oops->memory2key($ref, $id, $pkey);
$oops->{demandwrite}{$id}++;
if ($wcache_already) {
print "%*$id/$pkey vGETREF prior wcache: $qval{$wcache->{$pkey}}\n" if $debug_refalias;
} else {
if (exists $dcache->{$pkey}) {
print "%*$id/$pkey vGETREF no wcache - dcache\n" if $debug_refalias;
# done
} elsif (exists $rcache->{$pkey}) {
$wcache->{$pkey} = $rcache->{$pkey};
delete $rcache->{$pkey};
print "%*$id/$pkey vGETREF no wcache - rcache: $qval{$wcache->{$pkey}}\n" if $debug_refalias;
} elsif ($vars->{alldelete}) {
print "%*$id/$pkey vGETREF no wcache - alldelete\n" if $debug_refalias;
# done
} else {
$wcache->{$pkey} = $self->ORIGINAL_VALUE($pkey);
print "%*$id/$pkey vGETREF no wcache - original value: $qval{$wcache->{$pkey}}\n" if $debug_refalias;
}
}
print "%*$id/'$pkey' vGETREF MEMORY2KEY $qval{$ref} := *$id/$pkey\n" if $debug_memory || $debug_refalias;
$self->LOAD_SELF_REF($pkey);
return $ref;
}
sub LOAD_SELF_REF
{
my $self = shift;
my ($oops, $id, $rcache, $wcache, $necache, $ovcache, $dcache, $vars) = @$self;
return if exists $vars->{ref_to_self_loaded};
my $searchQ;
if (@_) {
my $pkey = shift;
no warnings qw(uninitialized);
return if exists $vars->{ref_to_pkey_loaded}{$pkey};
$vars->{ref_to_pkey_loaded}{$pkey} = 1;
print "\%$id searching for references to $qval{$pkey}\n" if $debug_refalias || $debug_virtual_delete || $debug_virtual_save;
$searchQ = $oops->query('reftargkey', execute => [ $id, $pkey ]);
} else {
$vars->{ref_to_self_loaded} = 1;
print "\%$id searching for references to keys\n" if $debug_refalias || $debug_virtual_delete || $debug_virtual_save;
$searchQ = $oops->query('reftargobject', execute => $id);
}
my $refid;
while (($refid) = $searchQ->fetchrow_array()) {
print "\%$id loading self-reference *$refid\n" if $debug_refalias || $debug_virtual_delete || $debug_virtual_save;
unless (exists $oops->{cache}{$refid}) {
$oops->load_object($refid);
my $x = $oops->{cache}{$refid}; # force untie
}
}
$searchQ->finish;
}
sub FIRSTKEY
{
my ($self) = @_;
my ($oops, $id, $rcache, $wcache, $necache, $ovcache, $dcache, $vars) = @$self;
#
# We don't share these because someone might want to do
# each() on more than one virutal object at the same time.
# Of course, we could check for that...
#
$vars->{dbeach}->finish if ref($vars->{dbeach});
if ($vars->{alldelete}) {
$vars->{dbeach} = 1;
print "%*$id vFIRSTKEY - wcache\n" if $debug_virtual_hash || $debug_demand_iterator;
} else {
$vars->{dbeach} = $oops->query('objectload', execute => $id);
print "%*$id vFIRSTKEY - query\n" if $debug_virtual_hash || $debug_demand_iterator;
}
keys %$wcache; # reset iterator
$oops->assertions;
return $self->NEXTKEY();
}
sub NEXTKEY
{
my ($self, $pkey) = @_;
my ($oops, $id, $rcache, $wcache, $necache, $ovcache, $dcache, $vars) = @$self;
my $dbe = $vars->{dbeach};
return () unless $dbe;
my ($name, $pval, $ptype);
if (ref($dbe) && (($pkey, $pval, $ptype) = $dbe->fetchrow_array())) {
{ no warnings; print "%*$id vNEXTKEY: query: '$pkey' ($pval/$ptype)\n" if $debug_virtual_hash || $debug_demand_iterator; }
no warnings qw(uninitialized);
if (exists $dcache->{$pkey}) {
print "%$id - nextpkey deleted\n" if $debug_demand_iterator;
goto &NEXTKEY;
}
unless ($oops->{args}{less_caching}) {
if ($ptype) {
$ovcache->{$pkey} = [ $pval, $ptype ];
} else {
$rcache->{$pkey} = $pval;
}
}
if (exists $wcache->{$pkey}) {
print "%$id - nextpkey is in wcache\n" if $debug_demand_iterator;
goto &NEXTKEY;
}
return $pkey;
} elsif (defined ($pkey = each(%$wcache))) {
$vars->{dbeach} = 1
if ref $vars->{dbeach};
print "%*$id vNEXTKEY: wcache: '$pkey'\n" if $debug_virtual_hash || $debug_demand_iterator;
return $pkey;
} else {
print "%*$id vNEXTKEY: done: undef\n" if $debug_virtual_hash || $debug_demand_iterator;
delete $vars->{dbeach};
return ();
}
}
# to retrieve just some of the keys of a hash
sub WALK_HASH
{
my ($self, $stride, $key) = @_;
my ($oops, $id, $rcache, $wcache, $necache, $ovcache, $dcache, $vars) = @$self;
my $gs;
if (@_ > 2 && defined($key)) {
$gs = $oops->{dbo}->adhoc_query(<<END, execute => [ $id, $key ]);
SELECT pkey, pval, ptype
FROM TP_attribute
WHERE id = ?
AND pkey > ?
ORDER BY pkey
LIMIT $stride
END
} else {
$gs = $oops->{dbo}->adhoc_query(<<END, execute => [ $id ]);
SELECT pkey, pval, ptype
FROM TP_attribute
WHERE id = ?
ORDER BY pkey
LIMIT $stride
END
}
my @ret;
my ($pkey, $pval, $ptype);
while (($pkey, $pval, $ptype) = $gs->fetchrow_array()) {
{ no warnings; print "%*$id vAUTO_SLICE: query: '$pkey' ($pval/$ptype)\n" if $debug_virtual_hash};
no warnings qw(uninitialized);
if (exists $dcache->{$pkey}) {
print "%$id - nextpkey deleted\n" if $debug_demand_iterator;
next;
}
unless ($oops->{args}{less_caching}) {
if ($ptype) {
$ovcache->{$pkey} = [ $pval, $ptype ];
} else {
$rcache->{$pkey} = $pval;
}
}
if (exists $wcache->{$pkey}) {
print "%$id - nextpkey is in wcache\n" if $debug_demand_iterator;
next;
}
push(@ret, $pkey);
}
$gs->finish();
return @ret;
}
sub SCALAR
{
my ($self) = @_;
my ($oops, $id, $rcache, $wcache, $necache, $ovcache, $dcache, $vars) = @$self;
if ($vars->{alldelete}) {
printf "%%*%d' vSCALAR: previous alldelete, returning %d (%s)\n", $id, scalar(keys(%$wcache)), scalar(%$wcache) if $debug_virtual_hash;
return scalar(keys(%$wcache));
}
unless ($vars->{originalKeyCount}) {
my $originalCountQ = $oops->query('countkeys', execute => [ $id ]);
($vars->{originalKeyCount}) = $originalCountQ->fetchrow_array();
$originalCountQ->finish();
}
my $doriginal = 0;
my $loadpkeyQ;
my %done;
for my $pkey (keys %$dcache, keys %$wcache) {
next if $done{$pkey}++;
if (exists $rcache->{$pkey}) {
print "%*$id/'$pkey' vSCALAR: in rcache\n" if $debug_virtual_hash;
$doriginal++;
next;
}
if (exists $necache->{$pkey}) {
print "%*$id/'$pkey' vSCALAR: in rcache\n" if $debug_virtual_hash;
next;
}
$loadpkeyQ = $oops->query('loadpkey')
unless $loadpkeyQ;
$loadpkeyQ->execute($id, $pkey);
if (my ($pval, $ptype) = $loadpkeyQ->fetchrow_array) {
$loadpkeyQ->finish();
if ($ptype) {
$ovcache->{$pkey} = [ $pval, $ptype ];
} else {
$rcache->{$pkey} = $pval;
}
$doriginal++;
print "%*$id/'$pkey' vSCALAR: found in db\n" if $debug_virtual_hash;
} else {
$necache->{$pkey} = 1;
print "%*$id/'$pkey' vSCALAR: not found in db\n" if $debug_virtual_hash;
}
die if $loadpkeyQ->{Active}; # debug
}
print "%*$id' vSCALAR: original key count = $vars->{originalKeyCount}\n" if $debug_virtual_hash;
print "%*$id' vSCALAR: deleted/replaced count: $doriginal\n" if $debug_virtual_hash;
printf "%%*%d' vSCALAR: write cache count: %d (%s)\n", $id, scalar(keys(%$wcache)), scalar(%$wcache) if $debug_virtual_hash;
my $r = $vars->{originalKeyCount} - $doriginal + keys %$wcache;
print "%*$id' vSCALAR: result = $r\n" if $debug_virtual_hash;
return $r;
}
sub CLEAR_CACHE
{
my ($self) = @_;
my ($oops, $id, $rcache, $wcache, $necache, $ovcache, $dcache, $vars) = @$self;
$necache = ();
$ovcache = ();
if (%$dcache or $vars->{keyrefs}) {
for my $i (keys %$rcache) {
delete $rcache->{$i}
unless exists $dcache->{$i}
or exists $vars->{keyrefs}{$i}
}
} else {
$rcache = ();
}
print "%*$id vCLEAR_CACHE\n" if $debug_virtual_hash;
}
}
# - - - - - - - - - - -
{
package OOPS::Aware;
# methods to overload...
sub object_id_assigned { my ($obj, $id) = @_; }
sub destroy { }
}
# - - - - - - - - - - -
{
package OOPS::FrontEnd;
use Carp qw(longmess);
use Scalar::Util qw(refaddr);
sub new
{
my ($pkg, $oops) = @_;
tie my %x, 'OOPS::NamedObjects', $oops;
my $self = bless \%x, $pkg;
#
# the following is a lie, but hopefully it's one that won't
# be caught.
#
$oops->memory($self, 1);
print "MEMORY OOPS::FE $qval{$self} := 1\n" if $debug_memory;
$tiedvars{$self} = __PACKAGE__.longmess if $debug_tiedvars;
return $self;
}
sub destroy { my $self = shift; { (tied %$self)->destroy; } untie %$self }
sub DESTROY { my $self = shift; delete $tiedvars{$self} if $debug_tiedvars }
sub commit { my $self = shift; my $tied = tied %$self; $tied->[0]->commit(@_); }
sub virtual_object { my $self = shift; my $tied = tied %$self; $tied->[0]->virtual_object(@_); }
sub workaround27555 { my $self = shift; my $tied = tied %$self; $tied->[0]->workaround27555(@_); }
sub load_object { my $self = shift; my $tied = tied %$self; $tied->[0]->load_object(@_); }
sub dbh { my $self = shift; my $tied = tied %$self; $tied->[0]->{dbo}->dbh }
sub clear_cache { my $self = shift; my $tied = tied %$self; $tied->[0]->clear_cache(@_); }
sub lock { my $self = shift; my $tied = tied %$self; $tied->[0]->lock(@_); }
sub oops { my $self = shift; my $tied = tied %$self; return $self }
}
# - - - - - - - - - - -
{
package OOPS::NamedObjects;
use Carp qw(longmess);
use Scalar::Util qw(refaddr);
sub TIEHASH
{
my ($pkg, $oops) = @_;
my $not = tied %{$oops->{named_objects}};
my $self = bless [ $oops, $not ], $pkg;
#
# the following is a lie, but hopefully it's one that won't
# be caught.
#
$oops->memory($self, 1);
print "MEMORY OOPS::NO $qval{$self} := 1\n" if $debug_memory;
$tiedvars{$self} = __PACKAGE__.longmess if $debug_tiedvars;
return $self;
}
sub destroy { my $self = shift; $self->[0]->DESTROY; }
sub DESTROY { my $self = shift; delete $tiedvars{$self} if $debug_tiedvars }
sub FETCH { my $self = shift; $self->[1]->FETCH(@_) }
sub EXISTS { my $self = shift; $self->[1]->EXISTS(@_) }
sub STORE { my $self = shift; $self->[1]->STORE(@_) }
sub DELETE { my $self = shift; $self->[1]->DELETE(@_) }
sub CLEAR { my $self = shift; $self->[1]->CLEAR(@_) }
sub GETREF { my $self = shift; $self->[1]->GETREF(@_) }
sub FIRSTKEY { my $self = shift; $self->[1]->FIRSTKEY(@_) }
sub NEXTKEY { my $self = shift; $self->[1]->NEXTKEY(@_) }
sub SCALAR { my $self = shift; $self->[1]->SCALAR(@_) }
sub SAVE_SELF { my $self = shift; $self->[1]->SAVE_SELF(@_) }
sub POST_SAVE { my $self = shift; $self->[1]->POST_SAVE(@_) }
}
1;
__END__
TODO:
remove $oops->{loaded}?
TEST:
deadlock detection/avoidances multi-process integrety
some more hash tests in the cross-product tests
memory leaks with misc, ref, array, hash, and slowtest.