public function finishWrite()
{
if ($this->readOnly) {
return;
} elseif (is_null($this->currentLang)) {
throw new MWException(__CLASS__ . ': must call startWrite() before finishWrite()');
}
$this->dbw->startAtomic(__METHOD__);
try {
$this->dbw->delete('l10n_cache', ['lc_lang' => $this->currentLang], __METHOD__);
foreach (array_chunk($this->batch, 500) as $rows) {
$this->dbw->insert('l10n_cache', $rows, __METHOD__);
}
$this->writesDone = true;
} catch (DBQueryError $e) {
if ($this->dbw->wasReadOnlyError()) {
$this->readOnly = true;
// just avoid site down time
} else {
throw $e;
}
}
$this->dbw->endAtomic(__METHOD__);
$this->currentLang = null;
$this->batch = [];
}
protected function initConnection($lockDb, IDatabase $db)
{
# Let this transaction see lock rows from other transactions
$db->query("SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;");
# Do everything in a transaction as it all gets rolled back eventually
$db->startAtomic(__CLASS__);
}
/**
* This function should *not* be called outside of JobQueueDB
*
* @param IDatabase $dbw
* @param IJobSpecification[] $jobs
* @param int $flags
* @param string $method
* @throws DBError
* @return void
*/
public function doBatchPushInternal(IDatabase $dbw, array $jobs, $flags, $method)
{
if (!count($jobs)) {
return;
}
$rowSet = array();
// (sha1 => job) map for jobs that are de-duplicated
$rowList = array();
// list of jobs for jobs that are not de-duplicated
foreach ($jobs as $job) {
$row = $this->insertFields($job);
if ($job->ignoreDuplicates()) {
$rowSet[$row['job_sha1']] = $row;
} else {
$rowList[] = $row;
}
}
if ($flags & self::QOS_ATOMIC) {
$dbw->startAtomic($method);
// wrap all the job additions in one transaction
}
try {
// Strip out any duplicate jobs that are already in the queue...
if (count($rowSet)) {
$res = $dbw->select('job', 'job_sha1', array('job_sha1' => array_keys($rowSet), 'job_token' => ''), $method);
foreach ($res as $row) {
wfDebug("Job with hash '{$row->job_sha1}' is a duplicate.\n");
unset($rowSet[$row->job_sha1]);
// already enqueued
}
}
// Build the full list of job rows to insert
$rows = array_merge($rowList, array_values($rowSet));
// Insert the job rows in chunks to avoid slave lag...
foreach (array_chunk($rows, 50) as $rowBatch) {
$dbw->insert('job', $rowBatch, $method);
}
JobQueue::incrStats('inserts', $this->type, count($rows));
JobQueue::incrStats('dupe_inserts', $this->type, count($rowSet) + count($rowList) - count($rows));
} catch (DBError $e) {
if ($flags & self::QOS_ATOMIC) {
$dbw->rollback($method);
}
throw $e;
}
if ($flags & self::QOS_ATOMIC) {
$dbw->endAtomic($method);
}
return;
}