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-rw-r--r--maintenance/storage/recompressTracked.php742
1 files changed, 742 insertions, 0 deletions
diff --git a/maintenance/storage/recompressTracked.php b/maintenance/storage/recompressTracked.php
new file mode 100644
index 00000000..7e4ed1b4
--- /dev/null
+++ b/maintenance/storage/recompressTracked.php
@@ -0,0 +1,742 @@
+<?php
+
+$optionsWithArgs = RecompressTracked::getOptionsWithArgs();
+require( dirname( __FILE__ ) .'/../commandLine.inc' );
+
+if ( count( $args ) < 1 ) {
+ echo "Usage: php recompressTracked.php [options] <cluster> [... <cluster>...]
+Moves blobs indexed by trackBlobs.php to a specified list of destination clusters, and recompresses them in the process. Restartable.
+
+Options:
+ --procs <procs> Set the number of child processes (default 1)
+ --copy-only Copy only, do not update the text table. Restart without this option to complete.
+ --debug-log <file> Log debugging data to the specified file
+ --info-log <file> Log progress messages to the specified file
+ --critical-log <file> Log error messages to the specified file
+";
+ exit( 1 );
+}
+
+$job = RecompressTracked::newFromCommandLine( $args, $options );
+$job->execute();
+
+class RecompressTracked {
+ var $destClusters;
+ var $batchSize = 1000;
+ var $orphanBatchSize = 1000;
+ var $reportingInterval = 10;
+ var $numProcs = 1;
+ var $useDiff, $pageBlobClass, $orphanBlobClass;
+ var $slavePipes, $slaveProcs, $prevSlaveId;
+ var $copyOnly = false;
+ var $isChild = false;
+ var $slaveId = false;
+ var $debugLog, $infoLog, $criticalLog;
+ var $store;
+
+ static $optionsWithArgs = array( 'procs', 'slave-id', 'debug-log', 'info-log', 'critical-log' );
+ static $cmdLineOptionMap = array(
+ 'procs' => 'numProcs',
+ 'copy-only' => 'copyOnly',
+ 'child' => 'isChild',
+ 'slave-id' => 'slaveId',
+ 'debug-log' => 'debugLog',
+ 'info-log' => 'infoLog',
+ 'critical-log' => 'criticalLog',
+ );
+
+ static function getOptionsWithArgs() {
+ return self::$optionsWithArgs;
+ }
+
+ static function newFromCommandLine( $args, $options ) {
+ $jobOptions = array( 'destClusters' => $args );
+ foreach ( self::$cmdLineOptionMap as $cmdOption => $classOption ) {
+ if ( isset( $options[$cmdOption] ) ) {
+ $jobOptions[$classOption] = $options[$cmdOption];
+ }
+ }
+ return new self( $jobOptions );
+ }
+
+ function __construct( $options ) {
+ foreach ( $options as $name => $value ) {
+ $this->$name = $value;
+ }
+ $this->store = new ExternalStoreDB;
+ if ( !$this->isChild ) {
+ $GLOBALS['wgDebugLogPrefix'] = "RCT M: ";
+ } elseif ( $this->slaveId !== false ) {
+ $GLOBALS['wgDebugLogPrefix'] = "RCT {$this->slaveId}: ";
+ }
+ $this->useDiff = function_exists( 'xdiff_string_bdiff' );
+ $this->pageBlobClass = $this->useDiff ? 'DiffHistoryBlob' : 'ConcatenatedGzipHistoryBlob';
+ $this->orphanBlobClass = 'ConcatenatedGzipHistoryBlob';
+ }
+
+ function debug( $msg ) {
+ wfDebug( "$msg\n" );
+ if ( $this->debugLog ) {
+ $this->logToFile( $msg, $this->debugLog );
+ }
+
+ }
+
+ function info( $msg ) {
+ echo "$msg\n";
+ if ( $this->infoLog ) {
+ $this->logToFile( $msg, $this->infoLog );
+ }
+ }
+
+ function critical( $msg ) {
+ echo "$msg\n";
+ if ( $this->criticalLog ) {
+ $this->logToFile( $msg, $this->criticalLog );
+ }
+ }
+
+ function logToFile( $msg, $file ) {
+ $header = '[' . date('d\TH:i:s') . '] ' . wfHostname() . ' ' . posix_getpid();
+ if ( $this->slaveId !== false ) {
+ $header .= "({$this->slaveId})";
+ }
+ $header .= ' ' . wfWikiID();
+ wfErrorLog( sprintf( "%-50s %s\n", $header, $msg ), $file );
+ }
+
+ /**
+ * Wait until the selected slave has caught up to the master.
+ * This allows us to use the slave for things that were committed in a
+ * previous part of this batch process.
+ */
+ function syncDBs() {
+ $dbw = wfGetDB( DB_MASTER );
+ $dbr = wfGetDB( DB_SLAVE );
+ $pos = $dbw->getMasterPos();
+ $dbr->masterPosWait( $pos, 100000 );
+ }
+
+ /**
+ * Execute parent or child depending on the isChild option
+ */
+ function execute() {
+ if ( $this->isChild ) {
+ $this->executeChild();
+ } else {
+ $this->executeParent();
+ }
+ }
+
+ /**
+ * Execute the parent process
+ */
+ function executeParent() {
+ if ( !$this->checkTrackingTable() ) {
+ return;
+ }
+
+ $this->syncDBs();
+ $this->startSlaveProcs();
+ $this->doAllPages();
+ $this->doAllOrphans();
+ $this->killSlaveProcs();
+ }
+
+ /**
+ * Make sure the tracking table exists and isn't empty
+ */
+ function checkTrackingTable() {
+ $dbr = wfGetDB( DB_SLAVE );
+ if ( !$dbr->tableExists( 'blob_tracking' ) ) {
+ $this->critical( "Error: blob_tracking table does not exist" );
+ return false;
+ }
+ $row = $dbr->selectRow( 'blob_tracking', '*', false, __METHOD__ );
+ if ( !$row ) {
+ $this->info( "Warning: blob_tracking table contains no rows, skipping this wiki." );
+ return false;
+ }
+ return true;
+ }
+
+ /**
+ * Start the worker processes.
+ * These processes will listen on stdin for commands.
+ * This necessary because text recompression is slow: loading, compressing and
+ * writing are all slow.
+ */
+ function startSlaveProcs() {
+ $cmd = 'php ' . wfEscapeShellArg( __FILE__ );
+ foreach ( self::$cmdLineOptionMap as $cmdOption => $classOption ) {
+ if ( $cmdOption == 'slave-id' ) {
+ continue;
+ } elseif ( in_array( $cmdOption, self::$optionsWithArgs ) && isset( $this->$classOption ) ) {
+ $cmd .= " --$cmdOption " . wfEscapeShellArg( $this->$classOption );
+ } elseif ( $this->$classOption ) {
+ $cmd .= " --$cmdOption";
+ }
+ }
+ $cmd .= ' --child' .
+ ' --wiki ' . wfEscapeShellArg( wfWikiID() ) .
+ ' ' . call_user_func_array( 'wfEscapeShellArg', $this->destClusters );
+
+ $this->slavePipes = $this->slaveProcs = array();
+ for ( $i = 0; $i < $this->numProcs; $i++ ) {
+ $pipes = false;
+ $spec = array(
+ array( 'pipe', 'r' ),
+ array( 'file', 'php://stdout', 'w' ),
+ array( 'file', 'php://stderr', 'w' )
+ );
+ wfSuppressWarnings();
+ $proc = proc_open( "$cmd --slave-id $i", $spec, $pipes );
+ wfRestoreWarnings();
+ if ( !$proc ) {
+ $this->critical( "Error opening slave process: $cmd" );
+ exit( 1 );
+ }
+ $this->slaveProcs[$i] = $proc;
+ $this->slavePipes[$i] = $pipes[0];
+ }
+ $this->prevSlaveId = -1;
+ }
+
+ /**
+ * Gracefully terminate the child processes
+ */
+ function killSlaveProcs() {
+ $this->info( "Waiting for slave processes to finish..." );
+ for ( $i = 0; $i < $this->numProcs; $i++ ) {
+ $this->dispatchToSlave( $i, 'quit' );
+ }
+ for ( $i = 0; $i < $this->numProcs; $i++ ) {
+ $status = proc_close( $this->slaveProcs[$i] );
+ if ( $status ) {
+ $this->critical( "Warning: child #$i exited with status $status" );
+ }
+ }
+ $this->info( "Done." );
+ }
+
+ /**
+ * Dispatch a command to the next available slave.
+ * This may block until a slave finishes its work and becomes available.
+ */
+ function dispatch( /*...*/ ) {
+ $args = func_get_args();
+ $pipes = $this->slavePipes;
+ $numPipes = stream_select( $x=array(), $pipes, $y=array(), 3600 );
+ if ( !$numPipes ) {
+ $this->critical( "Error waiting to write to slaves. Aborting" );
+ exit( 1 );
+ }
+ for ( $i = 0; $i < $this->numProcs; $i++ ) {
+ $slaveId = ( $i + $this->prevSlaveId + 1 ) % $this->numProcs;
+ if ( isset( $pipes[$slaveId] ) ) {
+ $this->prevSlaveId = $slaveId;
+ $this->dispatchToSlave( $slaveId, $args );
+ return;
+ }
+ }
+ $this->critical( "Unreachable" );
+ exit( 1 );
+ }
+
+ /**
+ * Dispatch a command to a specified slave
+ */
+ function dispatchToSlave( $slaveId, $args ) {
+ $args = (array)$args;
+ $cmd = implode( ' ', $args );
+ fwrite( $this->slavePipes[$slaveId], "$cmd\n" );
+ }
+
+ /**
+ * Move all tracked pages to the new clusters
+ */
+ function doAllPages() {
+ $dbr = wfGetDB( DB_SLAVE );
+ $i = 0;
+ $startId = 0;
+ $numPages = $dbr->selectField( 'blob_tracking',
+ 'COUNT(DISTINCT bt_page)',
+ # A condition is required so that this query uses the index
+ array( 'bt_moved' => 0 ),
+ __METHOD__
+ );
+ if ( $this->copyOnly ) {
+ $this->info( "Copying pages..." );
+ } else {
+ $this->info( "Moving pages..." );
+ }
+ while ( true ) {
+ $res = $dbr->select( 'blob_tracking',
+ array( 'bt_page' ),
+ array(
+ 'bt_moved' => 0,
+ 'bt_page > ' . $dbr->addQuotes( $startId )
+ ),
+ __METHOD__,
+ array(
+ 'DISTINCT',
+ 'ORDER BY' => 'bt_page',
+ 'LIMIT' => $this->batchSize,
+ )
+ );
+ if ( !$res->numRows() ) {
+ break;
+ }
+ foreach ( $res as $row ) {
+ $this->dispatch( 'doPage', $row->bt_page );
+ $i++;
+ }
+ $startId = $row->bt_page;
+ $this->report( 'pages', $i, $numPages );
+ }
+ $this->report( 'pages', $i, $numPages );
+ if ( $this->copyOnly ) {
+ $this->info( "All page copies queued." );
+ } else {
+ $this->info( "All page moves queued." );
+ }
+ }
+
+ /**
+ * Display a progress report
+ */
+ function report( $label, $current, $end ) {
+ $this->numBatches++;
+ if ( $current == $end || $this->numBatches >= $this->reportingInterval ) {
+ $this->numBatches = 0;
+ $this->info( "$label: $current / $end" );
+ wfWaitForSlaves( 5 );
+ }
+ }
+
+ /**
+ * Move all orphan text to the new clusters
+ */
+ function doAllOrphans() {
+ $dbr = wfGetDB( DB_SLAVE );
+ $startId = 0;
+ $i = 0;
+ $numOrphans = $dbr->selectField( 'blob_tracking',
+ 'COUNT(DISTINCT bt_text_id)',
+ array( 'bt_moved' => 0, 'bt_page' => 0 ),
+ __METHOD__ );
+ if ( !$numOrphans ) {
+ return;
+ }
+ if ( $this->copyOnly ) {
+ $this->info( "Copying orphans..." );
+ } else {
+ $this->info( "Moving orphans..." );
+ }
+ $ids = array();
+
+ while ( true ) {
+ $res = $dbr->select( 'blob_tracking',
+ array( 'bt_text_id' ),
+ array(
+ 'bt_moved' => 0,
+ 'bt_page' => 0,
+ 'bt_text_id > ' . $dbr->addQuotes( $startId )
+ ),
+ __METHOD__,
+ array(
+ 'DISTINCT',
+ 'ORDER BY' => 'bt_text_id',
+ 'LIMIT' => $this->batchSize
+ )
+ );
+ if ( !$res->numRows() ) {
+ break;
+ }
+ foreach ( $res as $row ) {
+ $ids[] = $row->bt_text_id;
+ $i++;
+ }
+ // Need to send enough orphan IDs to the child at a time to fill a blob,
+ // so orphanBatchSize needs to be at least ~100.
+ // batchSize can be smaller or larger.
+ while ( count( $ids ) > $this->orphanBatchSize ) {
+ $args = array_slice( $ids, 0, $this->orphanBatchSize );
+ $ids = array_slice( $ids, $this->orphanBatchSize );
+ array_unshift( $args, 'doOrphanList' );
+ call_user_func_array( array( $this, 'dispatch' ), $args );
+ }
+ $startId = $row->bt_text_id;
+ $this->report( 'orphans', $i, $numOrphans );
+ }
+ $this->report( 'orphans', $i, $numOrphans );
+ $this->info( "All orphans queued." );
+ }
+
+ /**
+ * Main entry point for worker processes
+ */
+ function executeChild() {
+ $this->debug( 'starting' );
+ $this->syncDBs();
+
+ while ( !feof( STDIN ) ) {
+ $line = rtrim( fgets( STDIN ) );
+ if ( $line == '' ) {
+ continue;
+ }
+ $this->debug( $line );
+ $args = explode( ' ', $line );
+ $cmd = array_shift( $args );
+ switch ( $cmd ) {
+ case 'doPage':
+ $this->doPage( intval( $args[0] ) );
+ break;
+ case 'doOrphanList':
+ $this->doOrphanList( array_map( 'intval', $args ) );
+ break;
+ case 'quit':
+ return;
+ }
+ wfWaitForSlaves( 5 );
+ }
+ }
+
+ /**
+ * Move tracked text in a given page
+ */
+ function doPage( $pageId ) {
+ $title = Title::newFromId( $pageId );
+ if ( $title ) {
+ $titleText = $title->getPrefixedText();
+ } else {
+ $titleText = '[deleted]';
+ }
+ $dbr = wfGetDB( DB_SLAVE );
+
+ // Finish any incomplete transactions
+ if ( !$this->copyOnly ) {
+ $this->finishIncompleteMoves( array( 'bt_page' => $pageId ) );
+ $this->syncDBs();
+ }
+
+ $startId = 0;
+ $trx = new CgzCopyTransaction( $this, $this->pageBlobClass );
+
+ while ( true ) {
+ $res = $dbr->select(
+ array( 'blob_tracking', 'text' ),
+ '*',
+ array(
+ 'bt_page' => $pageId,
+ 'bt_text_id > ' . $dbr->addQuotes( $startId ),
+ 'bt_moved' => 0,
+ 'bt_new_url IS NULL',
+ 'bt_text_id=old_id',
+ ),
+ __METHOD__,
+ array(
+ 'ORDER BY' => 'bt_text_id',
+ 'LIMIT' => $this->batchSize
+ )
+ );
+ if ( !$res->numRows() ) {
+ break;
+ }
+
+ $lastTextId = 0;
+ foreach ( $res as $row ) {
+ if ( $lastTextId == $row->bt_text_id ) {
+ // Duplicate (null edit)
+ continue;
+ }
+ $lastTextId = $row->bt_text_id;
+ // Load the text
+ $text = Revision::getRevisionText( $row );
+ if ( $text === false ) {
+ $this->critical( "Error loading {$row->bt_rev_id}/{$row->bt_text_id}" );
+ continue;
+ }
+
+ // Queue it
+ if ( !$trx->addItem( $text, $row->bt_text_id ) ) {
+ $this->debug( "$titleText: committing blob with " . $trx->getSize() . " items" );
+ $trx->commit();
+ $trx = new CgzCopyTransaction( $this, $this->pageBlobClass );
+ }
+ }
+ $startId = $row->bt_text_id;
+ }
+
+ $this->debug( "$titleText: committing blob with " . $trx->getSize() . " items" );
+ $trx->commit();
+ }
+
+ /**
+ * Atomic move operation.
+ *
+ * Write the new URL to the text table and set the bt_moved flag.
+ *
+ * This is done in a single transaction to provide restartable behaviour
+ * without data loss.
+ *
+ * The transaction is kept short to reduce locking.
+ */
+ function moveTextRow( $textId, $url ) {
+ if ( $this->copyOnly ) {
+ $this->critical( "Internal error: can't call moveTextRow() in --copy-only mode" );
+ exit( 1 );
+ }
+ $dbw = wfGetDB( DB_MASTER );
+ $dbw->begin();
+ $dbw->update( 'text',
+ array( // set
+ 'old_text' => $url,
+ 'old_flags' => 'external,utf-8',
+ ),
+ array( // where
+ 'old_id' => $textId
+ ),
+ __METHOD__
+ );
+ $dbw->update( 'blob_tracking',
+ array( 'bt_moved' => 1 ),
+ array( 'bt_text_id' => $textId ),
+ __METHOD__
+ );
+ $dbw->commit();
+ }
+
+ /**
+ * Moves are done in two phases: bt_new_url and then bt_moved.
+ * - bt_new_url indicates that the text has been copied to the new cluster.
+ * - bt_moved indicates that the text table has been updated.
+ *
+ * This function completes any moves that only have done bt_new_url. This
+ * can happen when the script is interrupted, or when --copy-only is used.
+ */
+ function finishIncompleteMoves( $conds ) {
+ $dbr = wfGetDB( DB_SLAVE );
+
+ $startId = 0;
+ $conds = array_merge( $conds, array(
+ 'bt_moved' => 0,
+ 'bt_new_url IS NOT NULL'
+ ));
+ while ( true ) {
+ $res = $dbr->select( 'blob_tracking',
+ '*',
+ array_merge( $conds, array( 'bt_text_id > ' . $dbr->addQuotes( $startId ) ) ),
+ __METHOD__,
+ array(
+ 'ORDER BY' => 'bt_text_id',
+ 'LIMIT' => $this->batchSize,
+ )
+ );
+ if ( !$res->numRows() ) {
+ break;
+ }
+ $this->debug( 'Incomplete: ' . $res->numRows() . ' rows' );
+ foreach ( $res as $row ) {
+ $this->moveTextRow( $row->bt_text_id, $row->bt_new_url );
+ }
+ $startId = $row->bt_text_id;
+ }
+ }
+
+ /**
+ * Returns the name of the next target cluster
+ */
+ function getTargetCluster() {
+ $cluster = next( $this->destClusters );
+ if ( $cluster === false ) {
+ $cluster = reset( $this->destClusters );
+ }
+ return $cluster;
+ }
+
+ /**
+ * Gets a DB master connection for the given external cluster name
+ */
+ function getExtDB( $cluster ) {
+ $lb = wfGetLBFactory()->getExternalLB( $cluster );
+ return $lb->getConnection( DB_MASTER );
+ }
+
+ /**
+ * Move an orphan text_id to the new cluster
+ */
+ function doOrphanList( $textIds ) {
+ // Finish incomplete moves
+ if ( !$this->copyOnly ) {
+ $this->finishIncompleteMoves( array( 'bt_text_id' => $textIds ) );
+ $this->syncDBs();
+ }
+
+ $trx = new CgzCopyTransaction( $this, $this->orphanBlobClass );
+
+ $res = wfGetDB( DB_SLAVE )->select(
+ array( 'text', 'blob_tracking' ),
+ array( 'old_id', 'old_text', 'old_flags' ),
+ array(
+ 'old_id' => $textIds,
+ 'bt_text_id=old_id',
+ 'bt_moved' => 0,
+ ),
+ __METHOD__,
+ array( 'DISTINCT' )
+ );
+
+ foreach ( $res as $row ) {
+ $text = Revision::getRevisionText( $row );
+ if ( $text === false ) {
+ $this->critical( "Error: cannot load revision text for old_id=$textId" );
+ continue;
+ }
+
+ if ( !$trx->addItem( $text, $row->old_id ) ) {
+ $this->debug( "[orphan]: committing blob with " . $trx->getSize() . " rows" );
+ $trx->commit();
+ $trx = new CgzCopyTransaction( $this, $this->orphanBlobClass );
+ }
+ }
+ $this->debug( "[orphan]: committing blob with " . $trx->getSize() . " rows" );
+ $trx->commit();
+ }
+}
+
+/**
+ * Class to represent a recompression operation for a single CGZ blob
+ */
+class CgzCopyTransaction {
+ var $parent;
+ var $blobClass;
+ var $cgz;
+ var $referrers;
+
+ /**
+ * Create a transaction from a RecompressTracked object
+ */
+ function __construct( $parent, $blobClass ) {
+ $this->blobClass = $blobClass;
+ $this->cgz = false;
+ $this->texts = array();
+ $this->parent = $parent;
+ }
+
+ /**
+ * Add text.
+ * Returns false if it's ready to commit.
+ */
+ function addItem( $text, $textId ) {
+ if ( !$this->cgz ) {
+ $class = $this->blobClass;
+ $this->cgz = new $class;
+ }
+ $hash = $this->cgz->addItem( $text );
+ $this->referrers[$textId] = $hash;
+ $this->texts[$textId] = $text;
+ return $this->cgz->isHappy();
+ }
+
+ function getSize() {
+ return count( $this->texts );
+ }
+
+ /**
+ * Recompress text after some aberrant modification
+ */
+ function recompress() {
+ $class = $this->blobClass;
+ $this->cgz = new $class;
+ $this->referrers = array();
+ foreach ( $this->texts as $textId => $text ) {
+ $hash = $this->cgz->addItem( $text );
+ $this->referrers[$textId] = $hash;
+ }
+ }
+
+ /**
+ * Commit the blob.
+ * Does nothing if no text items have been added.
+ * May skip the move if --copy-only is set.
+ */
+ function commit() {
+ $originalCount = count( $this->texts );
+ if ( !$originalCount ) {
+ return;
+ }
+
+ // Check to see if the target text_ids have been moved already.
+ //
+ // We originally read from the slave, so this can happen when a single
+ // text_id is shared between multiple pages. It's rare, but possible
+ // if a delete/move/undelete cycle splits up a null edit.
+ //
+ // We do a locking read to prevent closer-run race conditions.
+ $dbw = wfGetDB( DB_MASTER );
+ $dbw->begin();
+ $res = $dbw->select( 'blob_tracking',
+ array( 'bt_text_id', 'bt_moved' ),
+ array( 'bt_text_id' => array_keys( $this->referrers ) ),
+ __METHOD__, array( 'FOR UPDATE' ) );
+ $dirty = false;
+ foreach ( $res as $row ) {
+ if ( $row->bt_moved ) {
+ # This row has already been moved, remove it
+ $this->parent->debug( "TRX: conflict detected in old_id={$row->bt_text_id}" );
+ unset( $this->texts[$row->bt_text_id] );
+ $dirty = true;
+ }
+ }
+
+ // Recompress the blob if necessary
+ if ( $dirty ) {
+ if ( !count( $this->texts ) ) {
+ // All have been moved already
+ if ( $originalCount > 1 ) {
+ // This is suspcious, make noise
+ $this->critical( "Warning: concurrent operation detected, are there two conflicting " .
+ "processes running, doing the same job?" );
+ }
+ return;
+ }
+ $this->recompress();
+ }
+
+ // Insert the data into the destination cluster
+ $targetCluster = $this->parent->getTargetCluster();
+ $store = $this->parent->store;
+ $targetDB = $store->getMaster( $targetCluster );
+ $targetDB->clearFlag( DBO_TRX ); // we manage the transactions
+ $targetDB->begin();
+ $baseUrl = $this->parent->store->store( $targetCluster, serialize( $this->cgz ) );
+
+ // Write the new URLs to the blob_tracking table
+ foreach ( $this->referrers as $textId => $hash ) {
+ $url = $baseUrl . '/' . $hash;
+ $dbw->update( 'blob_tracking',
+ array( 'bt_new_url' => $url ),
+ array(
+ 'bt_text_id' => $textId,
+ 'bt_moved' => 0, # Check for concurrent conflicting update
+ ),
+ __METHOD__
+ );
+ }
+
+ $targetDB->commit();
+ // Critical section here: interruption at this point causes blob duplication
+ // Reversing the order of the commits would cause data loss instead
+ $dbw->commit();
+
+ // Write the new URLs to the text table and set the moved flag
+ if ( !$this->parent->copyOnly ) {
+ foreach ( $this->referrers as $textId => $hash ) {
+ $url = $baseUrl . '/' . $hash;
+ $this->parent->moveTextRow( $textId, $url );
+ }
+ }
+ }
+}
+