1 files changed, 0 insertions, 185 deletions
diff --git a/includes/ExternalStoreDB.php b/includes/ExternalStoreDB.php
deleted file mode 100644
index 6f2b33e1..00000000
--- a/includes/ExternalStoreDB.php
+++ /dev/null
@@ -1,185 +0,0 @@
-<?php
-/**
- * External storage in SQL database.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- * http://www.gnu.org/copyleft/gpl.html
- *
- * @file
- */
-
-/**
- * DB accessable external objects
- * @ingroup ExternalStorage
- */
-class ExternalStoreDB {
-
-	function __construct( $params = array() ) {
-		$this->mParams = $params;
-	}
-
-	/**
-	 * Get a LoadBalancer for the specified cluster
-	 *
-	 * @param $cluster String: cluster name
-	 * @return LoadBalancer object
-	 */
-	function &getLoadBalancer( $cluster ) {
-		$wiki = isset($this->mParams['wiki']) ? $this->mParams['wiki'] : false;
-
-		return wfGetLBFactory()->getExternalLB( $cluster, $wiki );
-	}
-
-	/**
-	 * Get a slave database connection for the specified cluster
-	 *
-	 * @param $cluster String: cluster name
-	 * @return DatabaseBase object
-	 */
-	function &getSlave( $cluster ) {
-		global $wgDefaultExternalStore;
-
-		$wiki = isset($this->mParams['wiki']) ? $this->mParams['wiki'] : false;
-		$lb =& $this->getLoadBalancer( $cluster );
-
-		if ( !in_array( "DB://" . $cluster, (array)$wgDefaultExternalStore ) ) {
-			wfDebug( "read only external store" );
-			$lb->allowLagged(true);
-		} else {
-			wfDebug( "writable external store" );
-		}
-
-		return $lb->getConnection( DB_SLAVE, array(), $wiki );
-	}
-
-	/**
-	 * Get a master database connection for the specified cluster
-	 *
-	 * @param $cluster String: cluster name
-	 * @return DatabaseBase object
-	 */
-	function &getMaster( $cluster ) {
-		$wiki = isset($this->mParams['wiki']) ? $this->mParams['wiki'] : false;
-		$lb =& $this->getLoadBalancer( $cluster );
-		return $lb->getConnection( DB_MASTER, array(), $wiki );
-	}
-
-	/**
-	 * Get the 'blobs' table name for this database
-	 *
-	 * @param $db DatabaseBase
-	 * @return String: table name ('blobs' by default)
-	 */
-	function getTable( &$db ) {
-		$table = $db->getLBInfo( 'blobs table' );
-		if ( is_null( $table ) ) {
-			$table = 'blobs';
-		}
-		return $table;
-	}
-
-	/**
-	 * Fetch data from given URL
-	 * @param $url String: an url of the form DB://cluster/id or DB://cluster/id/itemid for concatened storage.
-	 * @return mixed
-	 */
-	function fetchFromURL( $url ) {
-		$path = explode( '/', $url );
-		$cluster  = $path[2];
-		$id	  = $path[3];
-		if ( isset( $path[4] ) ) {
-			$itemID = $path[4];
-		} else {
-			$itemID = false;
-		}
-
-		$ret =& $this->fetchBlob( $cluster, $id, $itemID );
-
-		if ( $itemID !== false && $ret !== false ) {
-			return $ret->getItem( $itemID );
-		}
-		return $ret;
-	}
-
-	/**
-	 * Fetch a blob item out of the database; a cache of the last-loaded
-	 * blob will be kept so that multiple loads out of a multi-item blob
-	 * can avoid redundant database access and decompression.
-	 * @param $cluster
-	 * @param $id
-	 * @param $itemID
-	 * @return mixed
-	 * @private
-	 */
-	function &fetchBlob( $cluster, $id, $itemID ) {
-		/**
-		 * One-step cache variable to hold base blobs; operations that
-		 * pull multiple revisions may often pull multiple times from
-		 * the same blob. By keeping the last-used one open, we avoid
-		 * redundant unserialization and decompression overhead.
-		 */
-		static $externalBlobCache = array();
-
-		$cacheID = ( $itemID === false ) ? "$cluster/$id" : "$cluster/$id/";
-		if( isset( $externalBlobCache[$cacheID] ) ) {
-			wfDebug( "ExternalStoreDB::fetchBlob cache hit on $cacheID\n" );
-			return $externalBlobCache[$cacheID];
-		}
-
-		wfDebug( "ExternalStoreDB::fetchBlob cache miss on $cacheID\n" );
-
-		$dbr =& $this->getSlave( $cluster );
-		$ret = $dbr->selectField( $this->getTable( $dbr ), 'blob_text', array( 'blob_id' => $id ), __METHOD__ );
-		if ( $ret === false ) {
-			wfDebugLog( 'ExternalStoreDB', "ExternalStoreDB::fetchBlob master fallback on $cacheID\n" );
-			// Try the master
-			$dbw =& $this->getMaster( $cluster );
-			$ret = $dbw->selectField( $this->getTable( $dbw ), 'blob_text', array( 'blob_id' => $id ), __METHOD__ );
-			if( $ret === false) {
-				wfDebugLog( 'ExternalStoreDB', "ExternalStoreDB::fetchBlob master failed to find $cacheID\n" );
-			}
-		}
-		if( $itemID !== false && $ret !== false ) {
-			// Unserialise object; caller extracts item
-			$ret = unserialize( $ret );
-		}
-
-		$externalBlobCache = array( $cacheID => &$ret );
-		return $ret;
-	}
-
-	/**
-	 * Insert a data item into a given cluster
-	 *
-	 * @param $cluster String: the cluster name
-	 * @param $data String: the data item
-	 * @return string URL
-	 */
-	function store( $cluster, $data ) {
-		$dbw = $this->getMaster( $cluster );
-		$id = $dbw->nextSequenceValue( 'blob_blob_id_seq' );
-		$dbw->insert( $this->getTable( $dbw ),
-			array( 'blob_id' => $id, 'blob_text' => $data ),
-			__METHOD__ );
-		$id = $dbw->insertId();
-		if ( !$id ) {
-			throw new MWException( __METHOD__.': no insert ID' );
-		}
-		if ( $dbw->getFlag( DBO_TRX ) ) {
-			$dbw->commit( __METHOD__ );
-		}
-		return "DB://$cluster/$id";
-	}
-}