++ed by:
VOJ JONASS KLEE

3 PAUSE users
10 non-PAUSE users.

Nicolas Steenlant
and 16 contributors

NAME

Catmandu::Store::File::Memory::Bag - Index of all "files" in a Catmandu::Store::File::Memory "folder"

SYNOPSIS

    use Catmandu;

    my $store = Catmandu->store('File::Memory');

    my $index = $store->index;

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

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

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

    # Delete a folder
    $index->delete(1234);

    # Get a folder
    my $folder = $index->get(1234);

    # Get the files in an folder
    my $files = $index->files(1234);

    $files->each(sub {
        my $file = shift;

        my $name         = $file->_id;
        my $size         = $file->size;
        my $content_type = $file->content_type;
        my $created      = $file->created;
        my $modified     = $file->modified;

        $file->stream(IO::File->new(">/tmp/$name"), file);
    });

    # Add a file
    $files->upload(IO::File->new("<data.dat"),"data.dat");

    # Retrieve a file
    my $file = $files->get("data.dat");

    # Stream a file to an IO::Handle
    $files->stream(IO::File->new(">data.dat"),$file);

    # Delete a file
    $files->delete("data.dat");

    # Delete a folders
    $index->delete("1234");

DESCRIPTION

A Catmandu::Store::File::Memory::Bag contains all "files" available in a Catmandu::Store::File::Memory FileStore "folder". All methods of Catmandu::Bag, Catmandu::FileBag::Index and Catmandu::Droppable are implemented.

Every Catmandu::Bag is also an Catmandu::Iterable.

FOLDERS

All files in a Catmandu::Store::File::Memory are organized in "folders". To add a "folder" a new record needs to be added to the Catmandu::Store::File::Memory::Index :

    $index->add({_id => '1234'});

The _id field is the only metadata available in Memory stores. To add more metadata fields to a Memory store a Catmandu::Plugin::SideCar is required.

FILES

Files can be accessed via the "folder" identifier:

    my $files = $index->files('1234');

Use the upload method to add new files to a "folder". Use the download method to retrieve files from a "folder".

    $files->upload(IO::File->new("</tmp/data.txt"),'data.txt');

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

    $files->download(IO::File->new(">/tmp/data.txt"),$file);

METHODS

each(\&callback)

Execute callback on every "file" in the Memory store "folder". See Catmandu::Iterable for more iterator functions

exists($name)

Returns true when a "file" with identifier $name exists.

add($hash)

Adds a new "file" to the Memory store "folder". It is very much advised to use the upload method below to add new files

get($id)

Returns a hash containing the metadata of the file. The hash contains:

    * _id : the file name
    * size : file file size
    * content_type : the content_type
    * created : the creation date of the file
    * modified : the modification date of the file
    * _stream: a callback function to write the contents of a file to an L<IO::Handle>

If is very much advised to use the stream method below to retrieve files from the store.

delete($name)

Delete the "file" with name $name, if exists.

delete_all()

Delete all files in this folder.

upload(IO::Handle,$name)

Upload the IO::Handle reference to the Memory store "folder" and use $name as identifier.

stream(IO::Handle,$file)

Write the contents of the $file returned by get to the IO::Handle.

SEE ALSO

Catmandu::Store::File::Memory::Bag , Catmandu::Store::File::Memory , Catmandu::FileBag::Index , Catmandu::Plugin::SideCar , Catmandu::Bag , Catmandu::Droppable , Catmandu::Iterable