/**
* This evenement describe the structure of a table.
* It's send before a change append on a table.
* A end user of the lib should have no usage of this
*
* @return TableMapDTO
* @throws BinaryDataReaderException
* @throws ConfigException
*/
public function makeTableMapDTO()
{
$data = [];
$data['table_id'] = $this->binaryDataReader->readTableId();
$this->binaryDataReader->advance(2);
$data['schema_length'] = $this->binaryDataReader->readUInt8();
$data['schema_name'] = $this->binaryDataReader->read($data['schema_length']);
if ([] !== $this->config->getDatabasesOnly() && !in_array($data['schema_name'], $this->config->getDatabasesOnly(), true)) {
return null;
}
$this->binaryDataReader->advance(1);
$data['table_length'] = $this->binaryDataReader->readUInt8();
$data['table_name'] = $this->binaryDataReader->read($data['table_length']);
if ([] !== $this->config->getTablesOnly() && !in_array($data['table_name'], $this->config->getTablesOnly(), true)) {
return null;
}
$this->binaryDataReader->advance(1);
$data['columns_amount'] = $this->binaryDataReader->readCodedBinary();
$data['column_types'] = $this->binaryDataReader->read($data['columns_amount']);
// automatically clear table cache to save memory
if (count(self::$tableMapCache) > $this->config->getTableCacheSize()) {
self::$tableMapCache = array_slice(self::$tableMapCache, ceil($this->config->getTableCacheSize() / 2), null, true);
}
// already in cache don't parse
if (isset(self::$tableMapCache[$data['table_id']])) {
return new TableMapDTO($this->eventInfo, self::$tableMapCache[$data['table_id']]);
}
$this->binaryDataReader->readCodedBinary();
$columns = $this->repository->getFields($data['schema_name'], $data['table_name']);
$fields = [];
// if you drop tables and parse of logs you will get empty scheme
if (!empty($columns)) {
$columnLength = strlen($data['column_types']);
for ($i = 0; $i < $columnLength; $i++) {
// this a dirty hack to prevent row events containing columns which have been dropped
if (!isset($columns[$i])) {
$columns[$i] = ['COLUMN_NAME' => 'DROPPED_COLUMN_' . $i, 'COLLATION_NAME' => null, 'CHARACTER_SET_NAME' => null, 'COLUMN_COMMENT' => null, 'COLUMN_TYPE' => 'BLOB', 'COLUMN_KEY' => '', 'REFERENCED_TABLE_NAME' => '', 'REFERENCED_COLUMN_NAME' => ''];
$type = ConstFieldType::IGNORE;
} else {
$type = ord($data['column_types'][$i]);
}
$fields[$i] = Columns::parse($type, $columns[$i], $this->binaryDataReader);
}
}
// save to cache
self::$tableMapCache[$data['table_id']] = new TableMap($data['schema_name'], $data['table_name'], $data['table_id'], $data['columns_amount'], $fields);
return new TableMapDTO($this->eventInfo, self::$tableMapCache[$data['table_id']]);
}
/**
* @throws BinaryDataReaderException
* @throws BinLogException
* @throws ConfigException
* @throws EventException
* @throws MySQLReplicationException
* @throws JsonBinaryDecoderException
*/
public function consume()
{
$binaryDataReader = $this->packageService->makePackageFromBinaryData($this->socketConnect->getPacket(false));
// "ok" value on first byte continue
$binaryDataReader->advance(1);
// decode all events data
$eventInfo = new EventInfo($binaryDataReader->readInt32(), $binaryDataReader->readUInt8(), $binaryDataReader->readInt32(), $binaryDataReader->readInt32(), $binaryDataReader->readInt32(), $binaryDataReader->readUInt16(), $this->socketConnect->getCheckSum());
if (ConstEventType::TABLE_MAP_EVENT === $eventInfo->getType()) {
$event = $this->rowEventService->makeRowEvent($binaryDataReader, $eventInfo)->makeTableMapDTO();
if ($event !== null) {
$this->eventDispatcher->dispatch(ConstEventsNames::TABLE_MAP, $event);
}
} else {
if ([] !== $this->config->getEventsOnly() && !in_array($eventInfo->getType(), $this->config->getEventsOnly(), true)) {
return;
}
if (in_array($eventInfo->getType(), $this->config->getEventsIgnore(), true)) {
return;
}
if (in_array($eventInfo->getType(), [ConstEventType::UPDATE_ROWS_EVENT_V1, ConstEventType::UPDATE_ROWS_EVENT_V2], true)) {
$event = $this->rowEventService->makeRowEvent($binaryDataReader, $eventInfo)->makeUpdateRowsDTO();
if ($event !== null) {
$this->eventDispatcher->dispatch(ConstEventsNames::UPDATE, $event);
}
} elseif (in_array($eventInfo->getType(), [ConstEventType::WRITE_ROWS_EVENT_V1, ConstEventType::WRITE_ROWS_EVENT_V2], true)) {
$event = $this->rowEventService->makeRowEvent($binaryDataReader, $eventInfo)->makeWriteRowsDTO();
if ($event !== null) {
$this->eventDispatcher->dispatch(ConstEventsNames::WRITE, $event);
}
} elseif (in_array($eventInfo->getType(), [ConstEventType::DELETE_ROWS_EVENT_V1, ConstEventType::DELETE_ROWS_EVENT_V2], true)) {
$event = $this->rowEventService->makeRowEvent($binaryDataReader, $eventInfo)->makeDeleteRowsDTO();
if ($event !== null) {
$this->eventDispatcher->dispatch(ConstEventsNames::DELETE, $event);
}
} elseif (ConstEventType::XID_EVENT === $eventInfo->getType()) {
$this->eventDispatcher->dispatch(ConstEventsNames::XID, (new XidEvent($eventInfo, $binaryDataReader))->makeXidDTO());
} elseif (ConstEventType::ROTATE_EVENT === $eventInfo->getType()) {
$this->eventDispatcher->dispatch(ConstEventsNames::ROTATE, (new RotateEvent($eventInfo, $binaryDataReader))->makeRotateEventDTO());
} elseif (ConstEventType::GTID_LOG_EVENT === $eventInfo->getType()) {
$this->eventDispatcher->dispatch(ConstEventsNames::GTID, (new GtidEvent($eventInfo, $binaryDataReader))->makeGTIDLogDTO());
} elseif (ConstEventType::QUERY_EVENT === $eventInfo->getType()) {
$this->eventDispatcher->dispatch(ConstEventsNames::QUERY, (new QueryEvent($eventInfo, $binaryDataReader))->makeQueryDTO());
} elseif (ConstEventType::MARIA_GTID_EVENT === $eventInfo->getType()) {
$this->eventDispatcher->dispatch(ConstEventsNames::MARIADB_GTID, (new MariaDbGtidEvent($eventInfo, $binaryDataReader))->makeMariaDbGTIDLogDTO());
}
}
}
/**
* @param Config $config
* @throws MySQLReplicationException
* @throws DBALException
* @throws ConfigException
* @throws BinLogException
*/
public function __construct(Config $config)
{
$config->validate();
$this->connection = DriverManager::getConnection(['user' => $config->getUser(), 'password' => $config->getPassword(), 'host' => $config->getHost(), 'port' => $config->getPort(), 'driver' => 'pdo_mysql', 'charset' => $config->getCharset()]);
$this->repository = new MySQLRepository($this->connection);
$this->gtiService = new GtidService();
$this->binLogAuth = new BinLogAuth();
$this->socketConnect = new BinLogSocketConnect($config, $this->repository, $this->binLogAuth, $this->gtiService);
$this->socketConnect->connectToStream();
$this->jsonBinaryDecoderFactory = new JsonBinaryDecoderFactory();
$this->rowEventService = new RowEventService($config, $this->repository, $this->jsonBinaryDecoderFactory);
$this->binaryDataReaderService = new BinaryDataReaderService();
$this->eventDispatcher = new EventDispatcher();
$this->event = new Event($config, $this->socketConnect, $this->binaryDataReaderService, $this->rowEventService, $this->eventDispatcher);
}
/**
* @see https://dev.mysql.com/doc/internals/en/com-binlog-dump.html
* @throws BinLogException
*/
private function setBinLogDump()
{
$binFilePos = $this->config->getBinLogPosition();
$binFileName = $this->config->getBinLogFileName();
if ('' !== $this->config->getMariaDbGtid()) {
$this->execute('SET @mariadb_slave_capability = 4');
$this->execute('SET @slave_connect_state = \'' . $this->config->getMariaDbGtid() . '\'');
$this->execute('SET @slave_gtid_strict_mode = 0');
$this->execute('SET @slave_gtid_ignore_duplicates = 0');
}
if (0 === $binFilePos || '' === $binFileName) {
$master = $this->repository->getMasterStatus();
$binFilePos = $master['Position'];
$binFileName = $master['File'];
}
$prelude = pack('i', strlen($binFileName) + 11) . chr(ConstCommand::COM_BINLOG_DUMP);
$prelude .= pack('I', $binFilePos);
$prelude .= pack('v', 0);
$prelude .= pack('I', $this->config->getSlaveId());
$prelude .= $binFileName;
$this->writeToSocket($prelude);
$this->getPacket();
}
