// RACE: $name was already in the db, probably just inserted, so load from master
// Use DBO_TRX to avoid missing inserts due to other threads or REPEATABLE-READs
$table = $this->loadTable(
- $this->getDBConnection( DB_MASTER, LoadBalancer::CONN_TRX_AUTO )
+ $this->getDBConnection( DB_MASTER, LoadBalancer::CONN_TRX_AUTOCOMMIT )
);
$searchResult = array_search( $name, $table, true );
if ( $searchResult === false ) {
// If the connection is busy with a transaction, then defer the job writes
// until right before the main round commit step. Any errors that bubble
// up will rollback the main commit round.
- // b) mysql/postgres; DB connection is generally a separate CONN_TRX_AUTO handle.
+ // b) mysql/postgres; DB connection is generally a separate CONN_TRX_AUTOCOMMIT handle.
// No transaction is active nor will be started by writes, so enqueue the jobs
// now so that any errors will show up immediately as the interface expects. Any
// errors that bubble up will rollback the main commit round.
return ( $lb->getServerType( $lb->getWriterIndex() ) !== 'sqlite' )
// Keep a separate connection to avoid contention and deadlocks;
// However, SQLite has the opposite behavior due to DB-level locking.
- ? $lb->getConnectionRef( $index, [], $this->wiki, $lb::CONN_TRX_AUTO )
+ ? $lb->getConnectionRef( $index, [], $this->wiki, $lb::CONN_TRX_AUTOCOMMIT )
// Jobs insertion will be defered until the PRESEND stage to reduce contention.
: $lb->getConnectionRef( $index, [], $this->wiki );
}
const DOMAIN_ANY = '';
/** @var int DB handle should have DBO_TRX disabled and the caller will leave it as such */
+ const CONN_TRX_AUTOCOMMIT = 1;
+ /** @var int Alias for CONN_TRX_AUTOCOMMIT for b/c; deprecated since 1.31 */
const CONN_TRX_AUTO = 1;
/**
/**
* Get a connection handle by server index
*
- * The CONN_TRX_AUTO flag is ignored for databases with ATTR_DB_LEVEL_LOCKING
+ * The CONN_TRX_AUTOCOMMIT flag is ignored for databases with ATTR_DB_LEVEL_LOCKING
* (e.g. sqlite) in order to avoid deadlocks. ILoadBalancer::getServerAttributes()
* can be used to check such flags beforehand.
*
- * If the caller uses $domain or sets CONN_TRX_AUTO in $flags, then it must also
+ * If the caller uses $domain or sets CONN_TRX_AUTOCOMMIT in $flags, then it must also
* call ILoadBalancer::reuseConnection() on the handle when finished using it.
* In all other cases, this is not necessary, though not harmful either.
*
*
* The handle's methods simply wrap those of a Database handle
*
- * The CONN_TRX_AUTO flag is ignored for databases with ATTR_DB_LEVEL_LOCKING
+ * The CONN_TRX_AUTOCOMMIT flag is ignored for databases with ATTR_DB_LEVEL_LOCKING
* (e.g. sqlite) in order to avoid deadlocks. ILoadBalancer::getServerAttributes()
* can be used to check such flags beforehand.
*
* @param int $i Server index or DB_MASTER/DB_REPLICA
* @param array|string|bool $groups Query group(s), or false for the generic reader
* @param string|bool $domain Domain ID, or false for the current domain
- * @param int $flags Bitfield of CONN_* class constants (e.g. CONN_TRX_AUTO)
+ * @param int $flags Bitfield of CONN_* class constants (e.g. CONN_TRX_AUTOCOMMIT)
* @return DBConnRef
*/
public function getConnectionRef( $i, $groups = [], $domain = false, $flags = 0 );
*
* The handle's methods simply wrap those of a Database handle
*
- * The CONN_TRX_AUTO flag is ignored for databases with ATTR_DB_LEVEL_LOCKING
+ * The CONN_TRX_AUTOCOMMIT flag is ignored for databases with ATTR_DB_LEVEL_LOCKING
* (e.g. sqlite) in order to avoid deadlocks. ILoadBalancer::getServerAttributes()
* can be used to check such flags beforehand.
*
* @param int $i Server index or DB_MASTER/DB_REPLICA
* @param array|string|bool $groups Query group(s), or false for the generic reader
* @param string|bool $domain Domain ID, or false for the current domain
- * @param int $flags Bitfield of CONN_* class constants (e.g. CONN_TRX_AUTO)
+ * @param int $flags Bitfield of CONN_* class constants (e.g. CONN_TRX_AUTOCOMMIT)
* @return DBConnRef
*/
public function getLazyConnectionRef( $i, $groups = [], $domain = false, $flags = 0 );
*
* The handle's methods simply wrap those of a Database handle
*
- * The CONN_TRX_AUTO flag is ignored for databases with ATTR_DB_LEVEL_LOCKING
+ * The CONN_TRX_AUTOCOMMIT flag is ignored for databases with ATTR_DB_LEVEL_LOCKING
* (e.g. sqlite) in order to avoid deadlocks. ILoadBalancer::getServerAttributes()
* can be used to check such flags beforehand.
*
* @param int $db Server index or DB_MASTER/DB_REPLICA
* @param array|string|bool $groups Query group(s), or false for the generic reader
* @param string|bool $domain Domain ID, or false for the current domain
- * @param int $flags Bitfield of CONN_* class constants (e.g. CONN_TRX_AUTO)
+ * @param int $flags Bitfield of CONN_* class constants (e.g. CONN_TRX_AUTOCOMMIT)
* @return MaintainableDBConnRef
*/
public function getMaintenanceConnectionRef( $db, $groups = [], $domain = false, $flags = 0 );
* The index must be an actual index into the array. If a connection to the server is
* already open and not considered an "in use" foreign connection, this simply returns it.
*
- * Avoid using CONN_TRX_AUTO for databases with ATTR_DB_LEVEL_LOCKING (e.g. sqlite) in
+ * Avoid using CONN_TRX_AUTOCOMMIT for databases with ATTR_DB_LEVEL_LOCKING (e.g. sqlite) in
* order to avoid deadlocks. ILoadBalancer::getServerAttributes() can be used to check
* such flags beforehand.
*
- * If the caller uses $domain or sets CONN_TRX_AUTO in $flags, then it must also
+ * If the caller uses $domain or sets CONN_TRX_AUTOCOMMIT in $flags, then it must also
* call ILoadBalancer::reuseConnection() on the handle when finished using it.
* In all other cases, this is not necessary, though not harmful either.
*
*
* @param int $i Server index (does not support DB_MASTER/DB_REPLICA)
* @param string|bool $domain Domain ID, or false for the current domain
- * @param int $flags Bitfield of CONN_* class constants (e.g. CONN_TRX_AUTO)
+ * @param int $flags Bitfield of CONN_* class constants (e.g. CONN_TRX_AUTOCOMMIT)
* @return Database|bool Returns false on errors
* @throws DBAccessError
*/
if ( !empty( $connsByServer[$i] ) ) {
/** @var IDatabase[] $serverConns */
$serverConns = $connsByServer[$i];
-
return reset( $serverConns );
}
}
$domain = false; // local connection requested
}
- if ( ( $flags & self::CONN_TRX_AUTO ) === self::CONN_TRX_AUTO ) {
+ if ( ( $flags & self::CONN_TRX_AUTOCOMMIT ) === self::CONN_TRX_AUTOCOMMIT ) {
// Assuming all servers are of the same type (or similar), which is overwhelmingly
// the case, use the master server information to get the attributes. The information
// for $i cannot be used since it might be DB_REPLICA, which might require connection
// rows (e.g. FOR UPDATE) or (b) make small commits during a larger transactions
// to reduce lock contention. None of these apply for sqlite and using separate
// connections just causes self-deadlocks.
- $flags &= ~self::CONN_TRX_AUTO;
- $this->connLogger->info( __METHOD__ . ': ignoring CONN_TRX_AUTO to avoid deadlocks.' );
+ $flags &= ~self::CONN_TRX_AUTOCOMMIT;
+ $this->connLogger->info( __METHOD__ .
+ ': ignoring CONN_TRX_AUTOCOMMIT to avoid deadlocks.' );
}
}
// main set of DB connections but rather its own pool since:
// a) those are usually set to implicitly use transaction rounds via DBO_TRX
// b) those must support the use of explicit transaction rounds via beginMasterChanges()
- $autoCommit = ( ( $flags & self::CONN_TRX_AUTO ) == self::CONN_TRX_AUTO );
+ $autoCommit = ( ( $flags & self::CONN_TRX_AUTOCOMMIT ) == self::CONN_TRX_AUTOCOMMIT );
if ( $domain !== false ) {
// Connection is to a foreign domain
$domainInstance = DatabaseDomain::newFromId( $domain );
$dbName = $domainInstance->getDatabase();
$prefix = $domainInstance->getTablePrefix();
- $autoCommit = ( ( $flags & self::CONN_TRX_AUTO ) == self::CONN_TRX_AUTO );
+ $autoCommit = ( ( $flags & self::CONN_TRX_AUTOCOMMIT ) == self::CONN_TRX_AUTOCOMMIT );
if ( $autoCommit ) {
$connFreeKey = self::KEY_FOREIGN_FREE_NOROUND;
}
public function closeConnection( IDatabase $conn ) {
- $serverIndex = $conn->getLBInfo( 'serverIndex' ); // second index level of mConns
+ $serverIndex = $conn->getLBInfo( 'serverIndex' );
foreach ( $this->conns as $type => $connsByServer ) {
if ( !isset( $connsByServer[$serverIndex] ) ) {
continue;
$index = $this->replicaOnly ? DB_REPLICA : DB_MASTER;
if ( $lb->getServerType( $lb->getWriterIndex() ) !== 'sqlite' ) {
// Keep a separate connection to avoid contention and deadlocks
- $db = $lb->getConnection( $index, [], false, $lb::CONN_TRX_AUTO );
+ $db = $lb->getConnection( $index, [], false, $lb::CONN_TRX_AUTOCOMMIT );
// @TODO: Use a blank trx profiler to ignore expections as this is a cache
} else {
// However, SQLite has the opposite behavior due to DB-level locking.
$this->assertTrue( $dbr->getLBInfo( 'master' ), 'DB_REPLICA also gets the master' );
$this->assertTrue( $dbr->getFlag( $dbw::DBO_TRX ), "DBO_TRX set on replica" );
- $dbwAuto = $lb->getConnection( DB_MASTER, [], false, $lb::CONN_TRX_AUTO );
- $this->assertFalse( $dbwAuto->getFlag( $dbw::DBO_TRX ), "No DBO_TRX with CONN_TRX_AUTO" );
+ $dbwAuto = $lb->getConnection( DB_MASTER, [], false, $lb::CONN_TRX_AUTOCOMMIT );
+ $this->assertFalse(
+ $dbwAuto->getFlag( $dbw::DBO_TRX ), "No DBO_TRX with CONN_TRX_AUTOCOMMIT" );
$this->assertTrue( $dbw->getFlag( $dbw::DBO_TRX ), "DBO_TRX still set on master" );
- $this->assertNotEquals( $dbw, $dbwAuto, "CONN_TRX_AUTO uses separate connection" );
+ $this->assertNotEquals( $dbw, $dbwAuto, "CONN_TRX_AUTOCOMMIT uses separate connection" );
- $dbrAuto = $lb->getConnection( DB_REPLICA, [], false, $lb::CONN_TRX_AUTO );
- $this->assertFalse( $dbrAuto->getFlag( $dbw::DBO_TRX ), "No DBO_TRX with CONN_TRX_AUTO" );
+ $dbrAuto = $lb->getConnection( DB_REPLICA, [], false, $lb::CONN_TRX_AUTOCOMMIT );
+ $this->assertFalse(
+ $dbrAuto->getFlag( $dbw::DBO_TRX ), "No DBO_TRX with CONN_TRX_AUTOCOMMIT" );
$this->assertTrue( $dbr->getFlag( $dbw::DBO_TRX ), "DBO_TRX still set on replica" );
- $this->assertNotEquals( $dbr, $dbrAuto, "CONN_TRX_AUTO uses separate connection" );
+ $this->assertNotEquals( $dbr, $dbrAuto, "CONN_TRX_AUTOCOMMIT uses separate connection" );
- $dbwAuto2 = $lb->getConnection( DB_MASTER, [], false, $lb::CONN_TRX_AUTO );
- $this->assertEquals( $dbwAuto2, $dbwAuto, "CONN_TRX_AUTO reuses connections" );
+ $dbwAuto2 = $lb->getConnection( DB_MASTER, [], false, $lb::CONN_TRX_AUTOCOMMIT );
+ $this->assertEquals( $dbwAuto2, $dbwAuto, "CONN_TRX_AUTOCOMMIT reuses connections" );
$lb->closeAll();
}
$this->assertTrue( $dbr->getFlag( $dbw::DBO_TRX ), "DBO_TRX set on replica" );
$this->assertWriteForbidden( $dbr );
- $dbwAuto = $lb->getConnection( DB_MASTER, [], false, $lb::CONN_TRX_AUTO );
- $this->assertFalse( $dbwAuto->getFlag( $dbw::DBO_TRX ), "No DBO_TRX with CONN_TRX_AUTO" );
+ $dbwAuto = $lb->getConnection( DB_MASTER, [], false, $lb::CONN_TRX_AUTOCOMMIT );
+ $this->assertFalse(
+ $dbwAuto->getFlag( $dbw::DBO_TRX ), "No DBO_TRX with CONN_TRX_AUTOCOMMIT" );
$this->assertTrue( $dbw->getFlag( $dbw::DBO_TRX ), "DBO_TRX still set on master" );
- $this->assertNotEquals( $dbw, $dbwAuto, "CONN_TRX_AUTO uses separate connection" );
+ $this->assertNotEquals( $dbw, $dbwAuto, "CONN_TRX_AUTOCOMMIT uses separate connection" );
- $dbrAuto = $lb->getConnection( DB_REPLICA, [], false, $lb::CONN_TRX_AUTO );
- $this->assertFalse( $dbrAuto->getFlag( $dbw::DBO_TRX ), "No DBO_TRX with CONN_TRX_AUTO" );
+ $dbrAuto = $lb->getConnection( DB_REPLICA, [], false, $lb::CONN_TRX_AUTOCOMMIT );
+ $this->assertFalse(
+ $dbrAuto->getFlag( $dbw::DBO_TRX ), "No DBO_TRX with CONN_TRX_AUTOCOMMIT" );
$this->assertTrue( $dbr->getFlag( $dbw::DBO_TRX ), "DBO_TRX still set on replica" );
- $this->assertNotEquals( $dbr, $dbrAuto, "CONN_TRX_AUTO uses separate connection" );
+ $this->assertNotEquals( $dbr, $dbrAuto, "CONN_TRX_AUTOCOMMIT uses separate connection" );
- $dbwAuto2 = $lb->getConnection( DB_MASTER, [], false, $lb::CONN_TRX_AUTO );
- $this->assertEquals( $dbwAuto2, $dbwAuto, "CONN_TRX_AUTO reuses connections" );
+ $dbwAuto2 = $lb->getConnection( DB_MASTER, [], false, $lb::CONN_TRX_AUTOCOMMIT );
+ $this->assertEquals( $dbwAuto2, $dbwAuto, "CONN_TRX_AUTOCOMMIT reuses connections" );
$lb->closeAll();
}
class JobQueueDBSingle extends JobQueueDB {
protected function getDB( $index ) {
$lb = MediaWikiServices::getInstance()->getDBLoadBalancer();
- // Override to not use CONN_TRX_AUTO so that we see the same temporary `job` table
+ // Override to not use CONN_TRX_AUTOCOMMIT so that we see the same temporary `job` table
return $lb->getConnection( $index, [], $this->wiki );
}
}
$lb->expects( $this->once() )
->method( 'getConnection' )
- ->with( DB_MASTER, [ 'test' ], 'dummy', ILoadBalancer::CONN_TRX_AUTO )
+ ->with( DB_MASTER, [ 'test' ], 'dummy', ILoadBalancer::CONN_TRX_AUTOCOMMIT )
->willReturnCallback(
function () {
return $this->getDatabaseMock();
$ref = new DBConnRef(
$lb,
- [ DB_MASTER, [ 'test' ], 'dummy', ILoadBalancer::CONN_TRX_AUTO ]
+ [ DB_MASTER, [ 'test' ], 'dummy', ILoadBalancer::CONN_TRX_AUTOCOMMIT ]
);
$this->assertInstanceOf( ResultWrapper::class, $ref->select( 'whatever', '*' ) );
dépôts / lhc / web / wiklou.git / commitdiff