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<?php
/**
* Script to bootstrap TTMServer translation memory
*
* @author Niklas Laxström
* @license GPL-2.0+
* @file
*/
// Standard boilerplate to define $IP
if ( getenv( 'MW_INSTALL_PATH' ) !== false ) {
$IP = getenv( 'MW_INSTALL_PATH' );
} else {
$dir = __DIR__;
$IP = "$dir/../../..";
}
require_once "$IP/maintenance/Maintenance.php";
/**
* Script to bootstrap TTMServer translation memory.
* @since 2012-01-26
*/
class TTMServerBootstrap extends Maintenance {
/**
* @var bool Option for reindexing
*/
protected $reindex;
public function __construct() {
parent::__construct();
$this->mDescription = 'Script to bootstrap TTMServer.';
$this->addOption(
'threads',
'(optional) Number of threads',
/*required*/false,
/*has arg*/true
);
$this->addOption(
'ttmserver',
'(optional) Server configuration identifier',
/*required*/false,
/*has arg*/true
);
// This option erases all data, empties the index and rebuilds it.
$this->addOption(
'reindex',
'Update the index mapping. Warning: Clears all existing data in the index.'
);
$this->setBatchSize( 500 );
$this->start = microtime( true );
}
public function statusLine( $text, $channel = null ) {
$pid = sprintf( '%5s', getmypid() );
$prefix = sprintf( '%6.2f', microtime( true ) - $this->start );
$mem = sprintf( '%5.1fM', ( memory_get_usage( true ) / ( 1024 * 1024 ) ) );
$this->output( "$pid $prefix $mem $text", $channel );
}
public function execute() {
global $wgTranslateTranslationServices;
// TTMServer is the id of the enabled-by-default instance
$configKey = $this->getOption( 'ttmserver', 'TTMServer' );
if ( !isset( $wgTranslateTranslationServices[$configKey] ) ) {
$this->error( 'Translation memory is not configured properly', 1 );
}
$config = $wgTranslateTranslationServices[$configKey];
$this->reindex = $this->getOption( 'reindex', false );
// Do as little as possible in the main thread, to not clobber forked processes.
// See also #resetStateForFork.
$pid = pcntl_fork();
if ( $pid === 0 ) {
$this->resetStateForFork();
$this->beginBootStrap( $config );
exit();
} elseif ( $pid === -1 ) {
// Fork failed do it serialized
$this->beginBootStrap( $config );
} else {
// Main thread
$this->statusLine( "Forked thread $pid to handle bootstrapping\n" );
$status = 0;
pcntl_waitpid( $pid, $status );
}
$threads = $this->getOption( 'threads', 1 );
$pids = array();
$groups = MessageGroups::singleton()->getGroups();
foreach ( $groups as $id => $group ) {
/** @var MessageGroup $group */
if ( $group->isMeta() ) {
continue;
}
// Fork to increase speed with parallelism. Also helps with memory usage if there are leaks.
$pid = pcntl_fork();
if ( $pid === 0 ) {
$this->resetStateForFork();
$this->exportGroup( $group, $config );
exit();
} elseif ( $pid === -1 ) {
// Fork failed do it serialized
$this->exportGroup( $group, $config );
} else {
// Main thread
$this->statusLine( "Forked thread $pid to handle $id\n" );
$pids[$pid] = true;
// If we hit the thread limit, wait for any child to finish.
if ( count( $pids ) >= $threads ) {
$status = 0;
$pid = pcntl_wait( $status );
unset( $pids[$pid] );
}
}
}
// Return control after all threads have finished.
foreach ( array_keys( $pids ) as $pid ) {
$status = 0;
pcntl_waitpid( $pid, $status );
}
// It's okay to do this in the main thread as it is the last thing
$this->endBootstrap( $config );
}
protected function beginBootStrap( $config ) {
$this->statusLine( "Cleaning up old entries...\n" );
$server = TTMServer::factory( $config );
$server->setLogger( $this );
if ( $this->reindex ) {
$server->doMappingUpdate();
}
$server->beginBootstrap();
}
protected function endBootstrap( $config ) {
$this->statusLine( "Optimizing...\n" );
$server = TTMServer::factory( $config );
$server->setLogger( $this );
$server->endBootstrap();
}
protected function exportGroup( MessageGroup $group, $config ) {
$server = TTMServer::factory( $config );
$server->setLogger( $this );
$id = $group->getId();
$sourceLanguage = $group->getSourceLanguage();
$stats = MessageGroupStats::forGroup( $id );
$collection = $group->initCollection( $sourceLanguage );
$collection->filter( 'ignored' );
$collection->initMessages();
$server->beginBatch();
$inserts = array();
foreach ( $collection->keys() as $mkey => $title ) {
$handle = new MessageHandle( $title );
$inserts[] = array( $handle, $sourceLanguage, $collection[$mkey]->definition() );
}
while ( $inserts !== array() ) {
$batch = array_splice( $inserts, 0, $this->mBatchSize );
$server->batchInsertDefinitions( $batch );
}
$inserts = array();
foreach ( $stats as $targetLanguage => $numbers ) {
if ( $targetLanguage === $sourceLanguage ) {
continue;
}
if ( $numbers[MessageGroupStats::TRANSLATED] === 0 ) {
continue;
}
$collection->resetForNewLanguage( $targetLanguage );
$collection->filter( 'ignored' );
$collection->filter( 'translated', false );
$collection->loadTranslations();
foreach ( $collection->keys() as $mkey => $title ) {
$handle = new MessageHandle( $title );
$inserts[] = array( $handle, $sourceLanguage, $collection[$mkey]->translation() );
}
while ( count( $inserts ) >= $this->mBatchSize ) {
$batch = array_splice( $inserts, 0, $this->mBatchSize );
$server->batchInsertTranslations( $batch );
}
}
while ( $inserts !== array() ) {
$batch = array_splice( $inserts, 0, $this->mBatchSize );
$server->batchInsertTranslations( $batch );
}
$server->endBatch();
}
protected function resetStateForFork() {
// Child, reseed because there is no bug in PHP:
// http://bugs.php.net/bug.php?id=42465
mt_srand( getmypid() );
// Make sure all existing connections are dead,
// we can't use them in forked children.
LBFactory::destroyInstance();
}
}
$maintClass = 'TTMServerBootstrap';
require_once RUN_MAINTENANCE_IF_MAIN;
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