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| − | <!-- Pod2Wiki=_preamble_
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| − | This page has been automatically generated from the EPrints 3.2 source. Any wiki changes made between the 'Pod2Wiki=*' and 'Edit below this comment' comments will be lost.
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| − | -->
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| − | __NOTOC__
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| − | {{API}}{{Pod2Wiki}}{{API:Source|file=EPrints/Storage.pm|package_name=EPrints::Storage}}[[Category:API|Storage]]<div><!-- Edit below this comment -->
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| − | {{API_TODO}}{{API_TODO}}<!-- Pod2Wiki=head_name --></div>
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| − | ==NAME==
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| − | '''EPrints::Storage''' - store and retrieve objects in the storage engine
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| − | <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce; padding: 0em 1em 0em 1em; font-size: 80%; '>
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| − | <h4><span style='display:none'>User Comments</span></h4>
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| − | <!-- Edit below this comment -->
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| − | <!-- Pod2Wiki=head_synopsis --></div>
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| − | ==SYNOPSIS==
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| − | my $store = $repository->storage();
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| − | $store->store(
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| − | $fileobj, # file object
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| − | "diddle.pdf", # filename
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| − | $fh # file handle
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| − | );
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| − | <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce; padding: 0em 1em 0em 1em; font-size: 80%; '>
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| − | <h4><span style='display:none'>User Comments</span></h4>
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| − | <!-- Edit below this comment -->
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| − | <!-- Pod2Wiki=head_description --></div>
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| − | ==DESCRIPTION==
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| − | This module is the storage control layer which uses [[API:EPrints/Plugin/Storage|EPrints::Plugin::Storage]] plugins to support various storage back-ends. It enables the storage, retrieval and deletion of data streams. The maximum size of a stream is dependent on the back-end storage mechanism.
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| − | <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce; padding: 0em 1em 0em 1em; font-size: 80%; '>
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| − | <h4><span style='display:none'>User Comments</span></h4>
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| − | <!-- Edit below this comment -->
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| − | <!-- Pod2Wiki=head_methods --></div>
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| − | ==METHODS==
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| − | <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce; padding: 0em 1em 0em 1em; font-size: 80%; '>
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| − | <h4><span style='display:none'>User Comments</span></h4>
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| − | <!-- Edit below this comment -->
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| − | <!-- Pod2Wiki=item_new --></div>
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| − | ===$store = EPrints::Storage->new( $repository )===
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| − | Create a new storage object for $repository. Should not be used directly, see [[API:EPrints/Session|EPrints::Session]].
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| − | <h4><span style='display:none'>User Comments</span></h4>
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| − | <!-- Edit below this comment -->
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| − | <!-- Pod2Wiki=item_store --></div>
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| − | ===$len = $store->store( $fileobj, CODEREF )===
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| − | Read from and store all data from CODEREF for $fileobj. The '''filesize''' field in $fileobj must be set at the expected number of bytes to read from CODEREF.
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| − | Returns undef if the file couldn't be stored, otherwise the number of bytes read.
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| − | <h4><span style='display:none'>User Comments</span></h4>
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| − | <!-- Edit below this comment -->
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| − | <!-- Pod2Wiki=item_retrieve --></div>
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| − | ===$success = $store->retrieve( $fileobj, CALLBACK )===
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| − | <h4><span style='display:none'>User Comments</span></h4>
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| − | <!-- Edit below this comment -->
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| − | <!-- Pod2Wiki=item_delete --></div>
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| − | ===$success = $store->delete( $fileobj )===
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| − | Delete all object copies stored for $fileobj.
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| − | <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce; padding: 0em 1em 0em 1em; font-size: 80%; '>
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| − | <h4><span style='display:none'>User Comments</span></h4>
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| − | <!-- Edit below this comment -->
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| − | <!-- Pod2Wiki=item_delete_copy --></div>
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| − | ===$ok = $store->delete_copy( $plugin, $fileobj )===
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| − | Delete the copy of this file stored in $plugin.
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| − | <h4><span style='display:none'>User Comments</span></h4>
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| − | <!-- Edit below this comment -->
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| − | <!-- Pod2Wiki=item_get_local_copy --></div>
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| − | ===$filename = $store->get_local_copy( $fileobj )===
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| − | Return the name of a local copy of the file.
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| − | Will retrieve and cache the remote object using {{API:PodLink|file=File/Temp|package_name=File::Temp|section=|text=File::Temp}} if necessary.
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| − | Returns undef if retrieval failed.
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| − | <h4><span style='display:none'>User Comments</span></h4>
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| − | <!-- Edit below this comment -->
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| − | <!-- Pod2Wiki=item_get_remote_copy --></div>
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| − | ===$url = $store->get_remote_copy( $fileobj )===
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| − | Returns a URL from which this file can be accessed.
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| − | Returns undef if this file is not available via another service.
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| − | <h4><span style='display:none'>User Comments</span></h4>
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| − | <!-- Edit below this comment -->
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| − | <!-- Pod2Wiki=item_get_plugins --></div>
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| − | ===@plugins = $store->get_plugins( $fileobj )===
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| − | Returns the [[API:EPrints/Plugin/Storage|EPrints::Plugin::Storage]] plugin(s) to use for $fileobj. If more than one plugin is returned they should be used in turn until one succeeds.
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| − | <h4><span style='display:none'>User Comments</span></h4>
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| − | <!-- Edit below this comment -->
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| − | <!-- Pod2Wiki=item_copy --></div>
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| − | ===$ok = $store->copy( $plugin, $fileobj )===
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| − | Copy the contents of $fileobj into another storage $plugin.
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| − | Returns 1 on success, 0 on failure and -1 if a copy already exists in $plugin.
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| − | <h4><span style='display:none'>User Comments</span></h4>
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| − | <!-- Edit below this comment -->
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| − | <!-- Pod2Wiki=item_open_write --></div>
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| − | ===$ok = $storage->open_write( $fileobj )===
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| − | Start a write session for $fileobj. $fileobj must have at least the "filesize" property set (which is the number of bytes that will be written).
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| − | <h4><span style='display:none'>User Comments</span></h4>
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| − | <!-- Edit below this comment -->
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| − | <!-- Pod2Wiki=item_write --></div>
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| − | ===$ok = $storage->write( $fileobj, $buffer )===
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| − | Write $buffer to the storage plugin(s).
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| − | <h4><span style='display:none'>User Comments</span></h4>
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| − | <!-- Edit below this comment -->
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| − | <!-- Pod2Wiki=item_close_write --></div>
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| − | ===$ok = $storage->close_write( $fileobj );===
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| − | Finish writing to the storage plugin(s) for $fileobj.
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| − | <h4><span style='display:none'>User Comments</span></h4>
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| − | <!-- Edit below this comment -->
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| − | <!-- Pod2Wiki=_postamble_ --><!-- Edit below this comment -->
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