PhabricatorFileStorageEngineSelector.php
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PhabricatorFileStorageEngineSelector.php
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			<?php

			/**
			* Chooses appropriate storage engine(s) for files. When Phabricator needs
			* to write a blob of file data, it uses the configured selector to get a list
			* of suitable @{class:PhabricatorFileStorageEngine}s. For more information,
			* see @{article:File Storage Technical Documentation}.
			*
			* @task select Selecting Storage Engines
			*/
			abstract class PhabricatorFileStorageEngineSelector {

			final public function __construct() {
			// <empty>
			}


			/* -( Selecting Storage Engines )------------------------------------------ */


			/**
			* Select valid storage engines for a file. This method will be called by
			* Phabricator when it needs to store a file permanently. It must return a
			* list of valid @{class:PhabricatorFileStorageEngine}s.
			*
			* If you are extending this class to provide a custom selector, you
			* probably just want it to look like this:
			*
			* return array(new MyCustomFileStorageEngine());
			*
			* ...that is, store every file in whatever storage engine you're using.
			* However, you can also provide multiple storage engines, or store some files
			* in one engine and some files in a different engine by implementing a more
			* complex selector.
			*
			* @param string File data.
			* @param dict Dictionary of optional file metadata. This may be empty, or
			* have some additional keys like 'file' and 'author' which
			* provide metadata.
			* @return list List of @{class:PhabricatorFileStorageEngine}s, ordered by
			* preference.
			* @task select
			*/
			abstract public function selectStorageEngines($data, array $params);

			}