Patrick Hochstenbach
and 3 contributors


Catmandu::FileStore - Namespace for packages that can make files persistent


    # From the command line

    # Export a list of all file containers
    $ catmandu export File::Simple --root t/data to YAML

    # Export a list of all files in container '1234'
    $ catmandu export File::Simple --root t/data --bag 1234 to YAML

    # Add a file to the container '1234'
    $ catmandu stream /tmp/myfile.txt to File::Simple --root t/data --bag 1234 --id myfile.txt

    # Download the file 'myfile.txt' from the container '1234'
    $ catmandu stream File::Simple --root t/data --bag 1234 --id myfile.txt to /tmp/output.txt

    # Delete the file 'myfile.txt' from the container '1234'
    $ catmandu delete File::Simple --root t/data --bag 1234 --id myfile.txt

    # From Perl
    use Catmandu;

    my $store = Catmandu->store('File::Simple' , root => 't/data');

    # List all containers
    $store->index->each(sub {
        my $container = shift;

        print "%s\n" , $container->{_id};

    # Add a new container
    $store->index->add({ _id => '1234' });

    # Get the container
    my $files = $store->index->files('1234');

    # Add a file to the container
    $files->upload(IO::File->new('<foobar.txt'), 'foobar.txt');

    my $file = $files->get('foobar.txt');

    # Stream the contents of a file
    $files->stream(IO::File->new('>foobar.txt'), $file);

    # Delete a file

    # Delete a container


Each Catmandu::FileStore is a Catmandu::Store and inherits all its methods,

A Catmandu::FileStore is package to store and retrieve binary content in an filesystem, memory or a network. A Catmandu::FileStore contains one or more Catmandu::FileBag which is a kind of folder.

Each Catmandu::FileBag contains one or more files.

One special Catmandu::FileBag is the index and contains the listing of all Catmandu::FileBag in the Catmandu::FileStore.



The name of the index bag to use when no bag name is give. The index bag is a bag containing a listing of all Catmandu::FileBag-s in the Store.

    my $index = $store->index;

    $index->each(sub {
        my $bag = shift;

        printf "%s\n" , $bag->{_id};

The default class implementation to use for an index of Catmandu::FileBag-s. By default this is the Catmandu::FileStore implementation with '::Index' added.



Create or retieve a bag with name $name. Returns a Catmandu::FileBag.


Returns the index Catmandu::FileBag for the Catmandu::FileStore.

  my $index = $store->index;

  # Add a new file container
  $index->add({ _id => '1234'});

  # Anf use it...
  my $container = $store->bag('1234');

  $container->upload(IO::File->new('data.txt') , 'data.txt');


Return the current logger. Can be used when creating your own Stores.


    package Catmandu::Store::Hash;


    sub generator {
        my ($self) = @_;

        $self->log->debug("generating record");

See also: Catmandu for activating the logger in your main code.


Patrick Hochstenbach, <patrick.hochstenbach at>

Nicolas Steenlant, <nicolas.steenlant at>

Nicolas Franck, <nicolas.franck at>


Catmandu::Store::File::Simple, Catmandu::Store::File::Memory, Catmandu::FileBag


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 for more information.