MOCK > POE-Component-Client-MogileFS-0.02 > POE::Component::Client::MogileFS

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Module Version: 0.02   Source  

NAME ^

POE::Component::Client::MogileFS - an async MogileFS client for POE

VERSION ^

Version 0.02

SYNOPSIS ^

  use POE qw(Component::Client::MogileFS);

  my $num = 500;
  my @tasks;
  foreach (1..$num) {
      my $key = $_ .'x'. int(rand($num)) . time();
      my $data = $key x 1000;
      push @tasks, {
          method => 'store_content',
          domain => 'testdomain',
          trackers => [qw/192.168.0.31:6001/],
          args => [$key, 'testclass', $data],
          taskname => $key.':testclass:testdomain',
      };
  }

  POE::Session->create(
      inline_states => {
          _start => \&start_session,
          storesomestuff => \&storesomestuff,
          debugging => \&debugging,
      }
  );

  sub start_session {
      my ($kernel, $heap, $session) = @_[KERNEL, HEAP, SESSION];
      POE::Component::Client::MogileFS->spawn(
          alias => 'mog',
          max_concurrent => 50,
          result => [$session, 'storesomestuff'],
          debug => [$session, 'debugging'],
      );
      $kernel->post('mog', 'add_tasks', \@tasks);
  }

  my $count = 0;
  sub storesomestuff {
      my ($kernel,$result) = @_[KERNEL,ARG0];
      if ($result->{status}) {
          $count++;
          print "$count RESULT ".$result->{task}->{taskname};
          print " SUCCESS ".$result->{status}."\n";
      }
      else {
          print "$count RESULT ".$result->{task}->{taskname};
          print " FAILED\n";
          $kernel->post('mog', 'add_tasks', [$result->{task}]);
      }
      $kernel->post('mog', 'shutdown') if $count == $num;
  }

  sub debugging {
      my $result = $_[ARG0];
      print "DEBUG $result\n";
  }

  $poe_kernel->run();

DESCRIPTION ^

  POE::Component::Client::MogileFS is a POE component that uses Wheel::Run
  to fork off child processes which will execute MogileFS::Client methods
  with your provided data asyncronously.  By default it will not allow more
  than 10 concurrent connections, but you can adjust that as needed.

  This is my first go at a POE::Component so the api may change in future,
  and I'm really open to suggestions for improvement/features.

FUNCTIONS ^

spawn

  Can take the following arguments:

    alias => 'alias of mogilefs session or __PACKAGE__ by default',
    max_concurrent => 'max number of concurrent children - default 10',
    result => ['session alias or id', 'eventname'],
    debug => ['session alias or id', 'eventname'],
    todo => ['list of hashes of jobs todo']

session_id

  Returns the session id

add_tasks

  $kernel->post('session', 'add_tasks', \@tasks);

  Takes an arraref of hashes, each hash represents one MogileFS::Client method
  to call and should have the following keys:

  {method => 'MogileFS::Client method name',
   domain => 'domain to use',
   trackers => [array ref of trackers],
   args => [arrayref, of, args, for, method],
   taskname => 'name of this task',
  }

shutdown

  $kernel->post('session', 'shutdown');

  Kills the MogileFS session and cleans up.

result

  If result is set in spawn, then your event will get a hashref in ARG0.

  $_[ARG0]->{status} is whatever is returned from the MogileFS method you
  called, typically undef means it failed.

  $_[ARG0]->{task} is the task you originally gave add_task.

  This should allow you to retry if something fails and it's appropriate to
  do so (the synopsis contains an example of doing so, using store_content).

debug

  Returns back all the warnings and errors MogileFS::Client will spew in
  ARG0.  Mostly just useful for debugging.

STUFF ^

  This module is kinda simplistic in what MogileFS::Client methods you can
  use.  Essentially all it does is create a new MogileFS::Client object in
  each child, call the method you provide on that object with the arguments
  you specified and return the result.  Obviously this won't work for any
  methods that want more than one operation on the same object.  For example
  my $fh = $mogc->newfile( ... ); print $fh 'foobar'; close $fh; isn't going
  to work.  Instead use store_content;

  The session won't go away until you shutdown.  This is to allow you to do
  things like this:

  $kernel->post('session', 'add_tasks', \@tasks);
  $kernel->post('session', 'add_tasks', \@moretasks);

  and to re-add your tasks from result if they failed.

AUTHOR ^

mock, <mock at obscurity.org>

BUGS ^

Please report any bugs or feature requests to bug-poe-component-client-mogilefs at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=POE-Component-Client-MogileFS. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT ^

You can find documentation for this module with the perldoc command.

    perldoc POE::Component::Client::MogileFS

You can also look for information at:

COPYRIGHT & LICENSE ^

Copyright 2007 RJ Research, Inc, all rights reserved.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

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