Catmandu - a data toolkit
use Catmandu -all; use Catmandu qw(config store); use Catmandu -load; # loads default configuration file use Catmandu -all -load => [qw(/config/path' '/another/config/path)]; # If you have Catmandu::OAI and Catmandu::MongoDB installed my $importer = Catmandu->importer('OAI',url => 'https://biblio.ugent.be/oai') my $store = Catmandu->exporter('MongoDB',database_name => 'test'); # Import all the OAI records into MongoDB $store->add_many($importer); # Export all the MongoDB records to YAML and apply some fixes # myfixes.txt: # upcase(title.*) # remove_field(_metadata) # join_field(creator,'; ') # join_field(subject,'-- ') my $fixer = Catmandu->fixer('myfixes.txt'); my $exporter = Catmandu->exporter('YAML'); $exporter->add_many( $fixer->fix($store) ); $exporter->commit; # Or be very lazy and do this via the command line $ catmandu import OAI --url https://biblio.ugent.be/oai to MongoDB --database_name test $ catmandu export MongoDB --database_name test --fix myfixes.txt to YAML
Importing, transforming, storing and indexing data should be easy.
Catmandu provides a suite of Perl modules to ease the import, storage, retrieval, export and transformation of metadata records. Combine Catmandu modules with web application frameworks such as PSGI/Plack, document stores such as MongoDB and full text indexes such as Solr to create a rapid development environment for digital library services such as institutional repositories and search engines.
In the http://librecat.org/ project it is our goal to provide an open source set of programming components to build up digital libraries services suited to your local needs.
Read an in depth introduction into Catmandu programming at https://github.com/LibreCat/Catmandu/wiki/Introduction.
To install all Catmandu components in one step:
cpan Task::Catmandu # or cpanm --interactive Task::Catmandu
Read our wiki for more installation hints:
https://github.com/LibreCat/Catmandu/wiki/Install
Return the current logger (the Log::Any::Adapter for category Catmandu::Env). See Log::Any#Logging for how to send messages to the logger. Read our https://github.com/LibreCat/Catmandu/wiki/Cookbook "See some debug messages" for some hints on logging.
Set the location of the default configuration file to a new path.
Load all the configuration options in the catmandu.yml configuration file. See CONFIG below for extended examples of configuration options.
Load all the configuration options stored at alternative paths.
A load path ':up' will search upwards from your program for configuration.
':up'
See CONFIG below for extended examples of configuration options.
Returns an ARRAYREF of paths where configuration was found. Note that this list is empty before load.
load
Returns the first path where configuration was found. Note that this is undef before load.
undef
Returns the current configuration as a HASHREF.
Return the name of the default store.
Return an instance of Catmandu::Store. The NAME is a name of a Catmandu::Store or the name of a store configured in a catmandu.yml configuration file. When no NAME is given, the 'default' store in the configuration file will be used.
E.g. if the configuration file 'catmandu.yml' contains:
store: default: package: ElasticSearch options: index_name: blog test: package: Mock
then in your program:
# This will use ElasticSearch my $store = Catmandu->store('ElasticSearch', index_name => 'blog'); # or because we have a 'default' set in the configuration file my $store = Catmandu->store('default'); # or because 'default' will be used when no name was provided my $store = Catmandu->store; # This will use Mock my $store = Catmandu->store('test');
Configuration settings can be overwritten by the store command:
my $store2 = Catmandu->store('default', index_name => 'test2');
Return the name of the default fixer.
Return an instance of Catmandu::Fix. NAME can be the name of a fixer section in a catmandu.yml file. Or, one or more Catmandu::Fix-es can be provided inline.
fixer: default: - do_this() - do_that()
then in your program al these lines below will create the same fixer:
my $fixer = Catmandu->fixer('do_this()', 'do_that()'); my $fixer = Catmandu->fixer(['do_this()', 'do_that()']); my $fixer = Catmandu->fixer('default'); my $fixer = Catmandu->fixer(); # The default name is 'default'
FIX-es can be also written to a Fix script. E.g. if myfixes.txt contains:
do_this() do_that()
then the above code will even be equivalent to:
my $fixer = Catmandu->fixer('myfixes.txt');
Return the name of the default importer.
Return the name of the default importer package if no package name is given in the config or as a param.
Return an instance of Catmandu::Importer. The NAME is a name of a Catmandu::Importer or the name of a importer configured in a catmandu.yml configuration file. When no NAME is given, the 'default' importer in the configuration file will be used.
importer: default: package: OAI options: url: http://www.instute.org/oai/
then in your program all these lines will be equivalent:
my $importer = Catmandu->importer('OAI', url => 'http://www.instute.org/oai/'); my $importer = Catmandu->importer('default'); my $importer = Catmandu->importer(); # The default name is 'default'
Configuration settings can be overwritten by the importer command:
my $importer2 = Catmandu->importer('default', url => 'http://other.institute.org');
Return the name of the default exporter.
Return the name of the default exporter package if no package name is given in the config or as a param.
Return an instance of Catmandu::Exporter with name NAME (or the default when no name is given). The NAME is set in the configuration file (see 'importer').
Export data using a default or named exporter.
Catmandu->export({ foo=>'bar'}); my $importer = Catmandu::Importer::Mock->new; Catmandu->export($importer, 'YAML', file => '/my/file'); Catmandu->export($importer, 'my_exporter'); Catmandu->export($importer, 'my_exporter', foo => $bar);
Export data using a default or named exporter to a string.
my $importer = Catmandu::Importer::Mock->new; my $yaml = Catmandu->export_to_string($importer, 'YAML'); # is the same as my $yaml = ""; Catmandu->export($importer, 'YAML', file => \$yaml);
Same as Catmandu->config.
Catmandu->config
Same as Catmandu->store.
Catmandu->store
Same as Catmandu->importer.
Catmandu->importer
Same as Catmandu->exporter.
Catmandu->exporter
Same as Catmandu->export.
Catmandu->export
Same as Catmandu->export_to_string.
Catmandu->export_to_string
Same as Catmandu->fixer.
Catmandu->fixer
Same as Catmandu->log.
Catmandu->log
Import everything.
use Catmandu -load; use Catmandu -load => []; # is the same as Catmandu->load; use Catmandu -load => ['/config/path']; # is the same as Catmandu->load('/config/path');
Catmandu configuration options can be stored in files in the root directory of your programming project. The file can be YAML, JSON or Perl and is called catmandu.yml, catmandu.json or catmandu.pl. In this file you can set the default Catmandu stores and exporters to be used. Here is an example of a catmandu.yml file:
catmandu.yml
catmandu.json
catmandu.pl
store: default: package: ElasticSearch options: index_name: myrepository exporter: default: package: YAML
For large configs it's more convenient to split the config into several files. You can do so by having multiple config files starting with catmandu*.
catmandu.general.yml catmandu.db.yml ...
Split config files are processed and merged by Config::Onion.
Config files can indicate a path under which their keys will be nested. This makes your configuration more readable by keeping indentation to a minimum.
A config file containing
_prefix: foo: bar: baz: 1
will be loaded as
foo: bar: baz: 1
See Config::Onion for more information on how this works.
https://github.com/LibreCat/Catmandu/wiki
catmandu
Catmandu::Importer Catmandu::Exporter, Catmandu::Store, Catmandu::Fix, Catmandu::Iterable
Catmandu::Validator
Nicolas Steenlant, <nicolas.steenlant at ugent.be>
<nicolas.steenlant at ugent.be>
Nicolas Franck, nicolas.franck at ugent.be
nicolas.franck at ugent.be
Patrick Hochstenbach, patrick.hochstenbach at ugent.be
patrick.hochstenbach at ugent.be
Vitali Peil, vitali.peil at uni-bielefeld.de
vitali.peil at uni-bielefeld.de
Christian Pietsch, christian.pietsch at uni-bielefeld.de
christian.pietsch at uni-bielefeld.de
Dave Sherohman, dave.sherohman at ub.lu.se
dave.sherohman at ub.lu.se
Jakob Voss, nichtich at cpan.org
nichtich at cpan.org
This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.
See http://dev.perl.org/licenses/ for more information.
To install Catmandu, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Catmandu
CPAN shell
perl -MCPAN -e shell install Catmandu
For more information on module installation, please visit the detailed CPAN module installation guide.