RecompressTracked: Remove useless member variable
[lhc/web/wiklou.git] / maintenance / storage / recompressTracked.php
index b213929..292a25d 100644 (file)
@@ -58,7 +58,8 @@ class RecompressTracked {
        public $orphanBatchSize = 1000;
        public $reportingInterval = 10;
        public $numProcs = 1;
-       public $useDiff, $pageBlobClass, $orphanBlobClass;
+       public $numBatches = 0;
+       public $pageBlobClass, $orphanBlobClass;
        public $slavePipes, $slaveProcs, $prevSlaveId;
        public $copyOnly = false;
        public $isChild = false;
@@ -67,15 +68,15 @@ class RecompressTracked {
        public $debugLog, $infoLog, $criticalLog;
        public $store;
 
-       private static $optionsWithArgs = array(
+       private static $optionsWithArgs = [
                'procs',
                'slave-id',
                'debug-log',
                'info-log',
                'critical-log'
-       );
+       ];
 
-       private static $cmdLineOptionMap = array(
+       private static $cmdLineOptionMap = [
                'no-count' => 'noCount',
                'procs' => 'numProcs',
                'copy-only' => 'copyOnly',
@@ -84,14 +85,14 @@ class RecompressTracked {
                'debug-log' => 'debugLog',
                'info-log' => 'infoLog',
                'critical-log' => 'criticalLog',
-       );
+       ];
 
        static function getOptionsWithArgs() {
                return self::$optionsWithArgs;
        }
 
        static function newFromCommandLine( $args, $options ) {
-               $jobOptions = array( 'destClusters' => $args );
+               $jobOptions = [ 'destClusters' => $args ];
                foreach ( self::$cmdLineOptionMap as $cmdOption => $classOption ) {
                        if ( isset( $options[$cmdOption] ) ) {
                                $jobOptions[$classOption] = $options[$cmdOption];
@@ -111,8 +112,8 @@ class RecompressTracked {
                } elseif ( $this->slaveId !== false ) {
                        $GLOBALS['wgDebugLogPrefix'] = "RCT {$this->slaveId}: ";
                }
-               $this->useDiff = function_exists( 'xdiff_string_bdiff' );
-               $this->pageBlobClass = $this->useDiff ? 'DiffHistoryBlob' : 'ConcatenatedGzipHistoryBlob';
+               $this->pageBlobClass = function_exists( 'xdiff_string_bdiff' ) ?
+                       'DiffHistoryBlob' : 'ConcatenatedGzipHistoryBlob';
                $this->orphanBlobClass = 'ConcatenatedGzipHistoryBlob';
        }
 
@@ -195,7 +196,7 @@ class RecompressTracked {
 
                        return false;
                }
-               $row = $dbr->selectRow( 'blob_tracking', '*', false, __METHOD__ );
+               $row = $dbr->selectRow( 'blob_tracking', '*', '', __METHOD__ );
                if ( !$row ) {
                        $this->info( "Warning: blob_tracking table contains no rows, skipping this wiki." );
 
@@ -226,14 +227,14 @@ class RecompressTracked {
                        ' --wiki ' . wfEscapeShellArg( wfWikiID() ) .
                        ' ' . call_user_func_array( 'wfEscapeShellArg', $this->destClusters );
 
-               $this->slavePipes = $this->slaveProcs = array();
+               $this->slavePipes = $this->slaveProcs = [];
                for ( $i = 0; $i < $this->numProcs; $i++ ) {
-                       $pipes = false;
-                       $spec = array(
-                               array( 'pipe', 'r' ),
-                               array( 'file', 'php://stdout', 'w' ),
-                               array( 'file', 'php://stderr', 'w' )
-                       );
+                       $pipes = [];
+                       $spec = [
+                               [ 'pipe', 'r' ],
+                               [ 'file', 'php://stdout', 'w' ],
+                               [ 'file', 'php://stderr', 'w' ]
+                       ];
                        MediaWiki\suppressWarnings();
                        $proc = proc_open( "$cmd --slave-id $i", $spec, $pipes );
                        MediaWiki\restoreWarnings();
@@ -271,7 +272,7 @@ class RecompressTracked {
        function dispatch( /*...*/ ) {
                $args = func_get_args();
                $pipes = $this->slavePipes;
-               $numPipes = stream_select( $x = array(), $pipes, $y = array(), 3600 );
+               $numPipes = stream_select( $x = [], $pipes, $y = [], 3600 );
                if ( !$numPipes ) {
                        $this->critical( "Error waiting to write to slaves. Aborting" );
                        exit( 1 );
@@ -313,7 +314,7 @@ class RecompressTracked {
                        $numPages = $dbr->selectField( 'blob_tracking',
                                'COUNT(DISTINCT bt_page)',
                                # A condition is required so that this query uses the index
-                               array( 'bt_moved' => 0 ),
+                               [ 'bt_moved' => 0 ],
                                __METHOD__
                        );
                }
@@ -324,26 +325,26 @@ class RecompressTracked {
                }
                while ( true ) {
                        $res = $dbr->select( 'blob_tracking',
-                               array( 'bt_page' ),
-                               array(
+                               [ 'bt_page' ],
+                               [
                                        '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 ) {
+                               $startId = $row->bt_page;
                                $this->dispatch( 'doPage', $row->bt_page );
                                $i++;
                        }
-                       $startId = $row->bt_page;
                        $this->report( 'pages', $i, $numPages );
                }
                $this->report( 'pages', $i, $numPages );
@@ -365,7 +366,7 @@ class RecompressTracked {
                if ( $current == $end || $this->numBatches >= $this->reportingInterval ) {
                        $this->numBatches = 0;
                        $this->info( "$label: $current / $end" );
-                       $this->waitForSlaves();
+                       wfWaitForSlaves();
                }
        }
 
@@ -381,7 +382,7 @@ class RecompressTracked {
                } else {
                        $numOrphans = $dbr->selectField( 'blob_tracking',
                                'COUNT(DISTINCT bt_text_id)',
-                               array( 'bt_moved' => 0, 'bt_page' => 0 ),
+                               [ 'bt_moved' => 0, 'bt_page' => 0 ],
                                __METHOD__ );
                        if ( !$numOrphans ) {
                                return;
@@ -395,24 +396,25 @@ class RecompressTracked {
 
                while ( true ) {
                        $res = $dbr->select( 'blob_tracking',
-                               array( 'bt_text_id' ),
-                               array(
+                               [ 'bt_text_id' ],
+                               [
                                        '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;
                        }
-                       $ids = array();
+                       $ids = [];
                        foreach ( $res as $row ) {
+                               $startId = $row->bt_text_id;
                                $ids[] = $row->bt_text_id;
                                $i++;
                        }
@@ -423,15 +425,14 @@ class RecompressTracked {
                                $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 );
+                               call_user_func_array( [ $this, 'dispatch' ], $args );
                        }
                        if ( count( $ids ) ) {
                                $args = $ids;
                                array_unshift( $args, 'doOrphanList' );
-                               call_user_func_array( array( $this, 'dispatch' ), $args );
+                               call_user_func_array( [ $this, 'dispatch' ], $args );
                        }
 
-                       $startId = $row->bt_text_id;
                        $this->report( 'orphans', $i, $numOrphans );
                }
                $this->report( 'orphans', $i, $numOrphans );
@@ -463,7 +464,7 @@ class RecompressTracked {
                                case 'quit':
                                        return;
                        }
-                       $this->waitForSlaves();
+                       wfWaitForSlaves();
                }
        }
 
@@ -483,7 +484,7 @@ class RecompressTracked {
 
                // Finish any incomplete transactions
                if ( !$this->copyOnly ) {
-                       $this->finishIncompleteMoves( array( 'bt_page' => $pageId ) );
+                       $this->finishIncompleteMoves( [ 'bt_page' => $pageId ] );
                        $this->syncDBs();
                }
 
@@ -492,20 +493,20 @@ class RecompressTracked {
 
                while ( true ) {
                        $res = $dbr->select(
-                               array( 'blob_tracking', 'text' ),
+                               [ '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;
@@ -513,6 +514,7 @@ class RecompressTracked {
 
                        $lastTextId = 0;
                        foreach ( $res as $row ) {
+                               $startId = $row->bt_text_id;
                                if ( $lastTextId == $row->bt_text_id ) {
                                        // Duplicate (null edit)
                                        continue;
@@ -530,10 +532,9 @@ class RecompressTracked {
                                        $this->debug( "$titleText: committing blob with " . $trx->getSize() . " items" );
                                        $trx->commit();
                                        $trx = new CgzCopyTransaction( $this, $this->pageBlobClass );
-                                       $this->waitForSlaves();
+                                       wfWaitForSlaves();
                                }
                        }
-                       $startId = $row->bt_text_id;
                }
 
                $this->debug( "$titleText: committing blob with " . $trx->getSize() . " items" );
@@ -561,18 +562,18 @@ class RecompressTracked {
                $dbw = wfGetDB( DB_MASTER );
                $dbw->begin( __METHOD__ );
                $dbw->update( 'text',
-                       array( // set
+                       [ // set
                                'old_text' => $url,
                                'old_flags' => 'external,utf-8',
-                       ),
-                       array( // where
+                       ],
+                       [ // where
                                'old_id' => $textId
-                       ),
+                       ],
                        __METHOD__
                );
                $dbw->update( 'blob_tracking',
-                       array( 'bt_moved' => 1 ),
-                       array( 'bt_text_id' => $textId ),
+                       [ 'bt_moved' => 1 ],
+                       [ 'bt_text_id' => $textId ],
                        __METHOD__
                );
                $dbw->commit( __METHOD__ );
@@ -592,31 +593,31 @@ class RecompressTracked {
                $dbr = wfGetDB( DB_SLAVE );
 
                $startId = 0;
-               $conds = array_merge( $conds, array(
+               $conds = array_merge( $conds, [
                        '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 ) ) ),
+                               array_merge( $conds, [ '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 ) {
+                               $startId = $row->bt_text_id;
                                $this->moveTextRow( $row->bt_text_id, $row->bt_new_url );
                                if ( $row->bt_text_id % 10 == 0 ) {
-                                       $this->waitForSlaves();
+                                       wfWaitForSlaves();
                                }
                        }
-                       $startId = $row->bt_text_id;
                }
        }
 
@@ -652,22 +653,22 @@ class RecompressTracked {
        function doOrphanList( $textIds ) {
                // Finish incomplete moves
                if ( !$this->copyOnly ) {
-                       $this->finishIncompleteMoves( array( 'bt_text_id' => $textIds ) );
+                       $this->finishIncompleteMoves( [ '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(
+                       [ 'text', 'blob_tracking' ],
+                       [ 'old_id', 'old_text', 'old_flags' ],
+                       [
                                'old_id' => $textIds,
                                'bt_text_id=old_id',
                                'bt_moved' => 0,
-                       ),
+                       ],
                        __METHOD__,
-                       array( 'DISTINCT' )
+                       [ 'DISTINCT' ]
                );
 
                foreach ( $res as $row ) {
@@ -681,34 +682,22 @@ class RecompressTracked {
                                $this->debug( "[orphan]: committing blob with " . $trx->getSize() . " rows" );
                                $trx->commit();
                                $trx = new CgzCopyTransaction( $this, $this->orphanBlobClass );
-                               $this->waitForSlaves();
+                               wfWaitForSlaves();
                        }
                }
                $this->debug( "[orphan]: committing blob with " . $trx->getSize() . " rows" );
                $trx->commit();
        }
-
-       /**
-        * Wait for slaves (quietly)
-        */
-       function waitForSlaves() {
-               $lb = wfGetLB();
-               while ( true ) {
-                       list( $host, $maxLag ) = $lb->getMaxLag();
-                       if ( $maxLag < 2 ) {
-                               break;
-                       }
-                       sleep( 5 );
-               }
-       }
 }
 
 /**
  * Class to represent a recompression operation for a single CGZ blob
  */
 class CgzCopyTransaction {
+       /** @var RecompressTracked */
        public $parent;
        public $blobClass;
+       /** @var ConcatenatedGzipHistoryBlob */
        public $cgz;
        public $referrers;
 
@@ -720,7 +709,7 @@ class CgzCopyTransaction {
        function __construct( $parent, $blobClass ) {
                $this->blobClass = $blobClass;
                $this->cgz = false;
-               $this->texts = array();
+               $this->texts = [];
                $this->parent = $parent;
        }
 
@@ -753,7 +742,7 @@ class CgzCopyTransaction {
        function recompress() {
                $class = $this->blobClass;
                $this->cgz = new $class;
-               $this->referrers = array();
+               $this->referrers = [];
                foreach ( $this->texts as $textId => $text ) {
                        $hash = $this->cgz->addItem( $text );
                        $this->referrers[$textId] = $hash;
@@ -771,19 +760,20 @@ class CgzCopyTransaction {
                        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.
+               /* 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( __METHOD__ );
                $res = $dbw->select( 'blob_tracking',
-                       array( 'bt_text_id', 'bt_moved' ),
-                       array( 'bt_text_id' => array_keys( $this->referrers ) ),
-                       __METHOD__, array( 'FOR UPDATE' ) );
+                       [ 'bt_text_id', 'bt_moved' ],
+                       [ 'bt_text_id' => array_keys( $this->referrers ) ],
+                       __METHOD__, [ 'FOR UPDATE' ] );
                $dirty = false;
                foreach ( $res as $row ) {
                        if ( $row->bt_moved ) {
@@ -800,7 +790,8 @@ class CgzCopyTransaction {
                                // All have been moved already
                                if ( $originalCount > 1 ) {
                                        // This is suspcious, make noise
-                                       $this->critical( "Warning: concurrent operation detected, are there two conflicting " .
+                                       $this->parent->critical(
+                                               "Warning: concurrent operation detected, are there two conflicting " .
                                                "processes running, doing the same job?" );
                                }
 
@@ -821,11 +812,11 @@ class CgzCopyTransaction {
                foreach ( $this->referrers as $textId => $hash ) {
                        $url = $baseUrl . '/' . $hash;
                        $dbw->update( 'blob_tracking',
-                               array( 'bt_new_url' => $url ),
-                               array(
+                               [ 'bt_new_url' => $url ],
+                               [
                                        'bt_text_id' => $textId,
                                        'bt_moved' => 0, # Check for concurrent conflicting update
-                               ),
+                               ],
                                __METHOD__
                        );
                }