Examples with LoadLogEvent com.taobao.tddl.dbsync.binlog.event.LoadLogEvent used on opensource projects

Example 1 with LoadLogEvent

use of com.taobao.tddl.dbsync.binlog.event.LoadLogEvent in project canal by alibaba.

the class LogDecoder method decode.

/**
 * Deserialize an event from buffer.
 *
 * @return <code>UknownLogEvent</code> if event type is unknown or skipped.
 */
public static LogEvent decode(LogBuffer buffer, LogHeader header, LogContext context) throws IOException {
    FormatDescriptionLogEvent descriptionEvent = context.getFormatDescription();
    LogPosition logPosition = context.getLogPosition();
    int checksumAlg = LogEvent.BINLOG_CHECKSUM_ALG_UNDEF;
    if (header.getType() != LogEvent.FORMAT_DESCRIPTION_EVENT) {
        checksumAlg = descriptionEvent.header.getChecksumAlg();
    } else {
        // 如果是format事件自己，也需要处理checksum
        checksumAlg = header.getChecksumAlg();
    }
    if (checksumAlg != LogEvent.BINLOG_CHECKSUM_ALG_OFF && checksumAlg != LogEvent.BINLOG_CHECKSUM_ALG_UNDEF) {
        // remove checksum bytes
        buffer.limit(header.getEventLen() - LogEvent.BINLOG_CHECKSUM_LEN);
    }
    GTIDSet gtidSet = context.getGtidSet();
    LogEvent gtidLogEvent = context.getGtidLogEvent();
    switch(header.getType()) {
        case LogEvent.QUERY_EVENT:
            {
                QueryLogEvent event = new QueryLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                header.putGtid(context.getGtidSet(), gtidLogEvent);
                return event;
            }
        case LogEvent.XID_EVENT:
            {
                XidLogEvent event = new XidLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                header.putGtid(context.getGtidSet(), gtidLogEvent);
                return event;
            }
        case LogEvent.TABLE_MAP_EVENT:
            {
                TableMapLogEvent mapEvent = new TableMapLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                context.putTable(mapEvent);
                return mapEvent;
            }
        case LogEvent.WRITE_ROWS_EVENT_V1:
        case LogEvent.WRITE_ROWS_EVENT:
            {
                RowsLogEvent event = new WriteRowsLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                event.fillTable(context);
                header.putGtid(context.getGtidSet(), gtidLogEvent);
                return event;
            }
        case LogEvent.UPDATE_ROWS_EVENT_V1:
        case LogEvent.UPDATE_ROWS_EVENT:
            {
                RowsLogEvent event = new UpdateRowsLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                event.fillTable(context);
                header.putGtid(context.getGtidSet(), gtidLogEvent);
                return event;
            }
        case LogEvent.DELETE_ROWS_EVENT_V1:
        case LogEvent.DELETE_ROWS_EVENT:
            {
                RowsLogEvent event = new DeleteRowsLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                event.fillTable(context);
                header.putGtid(context.getGtidSet(), gtidLogEvent);
                return event;
            }
        case LogEvent.ROTATE_EVENT:
            {
                RotateLogEvent event = new RotateLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition = new LogPosition(event.getFilename(), event.getPosition());
                context.setLogPosition(logPosition);
                return event;
            }
        case LogEvent.LOAD_EVENT:
        case LogEvent.NEW_LOAD_EVENT:
            {
                LoadLogEvent event = new LoadLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                return event;
            }
        case LogEvent.SLAVE_EVENT:
            /* can never happen (unused event) */
            {
                if (logger.isWarnEnabled())
                    logger.warn("Skipping unsupported SLAVE_EVENT from: " + context.getLogPosition());
                break;
            }
        case LogEvent.CREATE_FILE_EVENT:
            {
                CreateFileLogEvent event = new CreateFileLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                return event;
            }
        case LogEvent.APPEND_BLOCK_EVENT:
            {
                AppendBlockLogEvent event = new AppendBlockLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                return event;
            }
        case LogEvent.DELETE_FILE_EVENT:
            {
                DeleteFileLogEvent event = new DeleteFileLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                return event;
            }
        case LogEvent.EXEC_LOAD_EVENT:
            {
                ExecuteLoadLogEvent event = new ExecuteLoadLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                return event;
            }
        case LogEvent.START_EVENT_V3:
            {
                /* This is sent only by MySQL <=4.x */
                StartLogEventV3 event = new StartLogEventV3(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                return event;
            }
        case LogEvent.STOP_EVENT:
            {
                StopLogEvent event = new StopLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                return event;
            }
        case LogEvent.INTVAR_EVENT:
            {
                IntvarLogEvent event = new IntvarLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                return event;
            }
        case LogEvent.RAND_EVENT:
            {
                RandLogEvent event = new RandLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                header.putGtid(context.getGtidSet(), gtidLogEvent);
                return event;
            }
        case LogEvent.USER_VAR_EVENT:
            {
                UserVarLogEvent event = new UserVarLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                header.putGtid(context.getGtidSet(), gtidLogEvent);
                return event;
            }
        case LogEvent.FORMAT_DESCRIPTION_EVENT:
            {
                descriptionEvent = new FormatDescriptionLogEvent(header, buffer, descriptionEvent);
                context.setFormatDescription(descriptionEvent);
                return descriptionEvent;
            }
        case LogEvent.PRE_GA_WRITE_ROWS_EVENT:
            {
                if (logger.isWarnEnabled())
                    logger.warn("Skipping unsupported PRE_GA_WRITE_ROWS_EVENT from: " + context.getLogPosition());
                // description_event);
                break;
            }
        case LogEvent.PRE_GA_UPDATE_ROWS_EVENT:
            {
                if (logger.isWarnEnabled())
                    logger.warn("Skipping unsupported PRE_GA_UPDATE_ROWS_EVENT from: " + context.getLogPosition());
                // description_event);
                break;
            }
        case LogEvent.PRE_GA_DELETE_ROWS_EVENT:
            {
                if (logger.isWarnEnabled())
                    logger.warn("Skipping unsupported PRE_GA_DELETE_ROWS_EVENT from: " + context.getLogPosition());
                // description_event);
                break;
            }
        case LogEvent.BEGIN_LOAD_QUERY_EVENT:
            {
                BeginLoadQueryLogEvent event = new BeginLoadQueryLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                return event;
            }
        case LogEvent.EXECUTE_LOAD_QUERY_EVENT:
            {
                ExecuteLoadQueryLogEvent event = new ExecuteLoadQueryLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                return event;
            }
        case LogEvent.INCIDENT_EVENT:
            {
                IncidentLogEvent event = new IncidentLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                return event;
            }
        case LogEvent.HEARTBEAT_LOG_EVENT:
            {
                HeartbeatLogEvent event = new HeartbeatLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                return event;
            }
        case LogEvent.IGNORABLE_LOG_EVENT:
            {
                IgnorableLogEvent event = new IgnorableLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                return event;
            }
        case LogEvent.ROWS_QUERY_LOG_EVENT:
            {
                RowsQueryLogEvent event = new RowsQueryLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                header.putGtid(context.getGtidSet(), gtidLogEvent);
                return event;
            }
        case LogEvent.PARTIAL_UPDATE_ROWS_EVENT:
            {
                RowsLogEvent event = new UpdateRowsLogEvent(header, buffer, descriptionEvent, true);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                event.fillTable(context);
                header.putGtid(context.getGtidSet(), gtidLogEvent);
                return event;
            }
        case LogEvent.GTID_LOG_EVENT:
        case LogEvent.ANONYMOUS_GTID_LOG_EVENT:
            {
                GtidLogEvent event = new GtidLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                if (gtidSet != null) {
                    gtidSet.update(event.getGtidStr());
                    // update latest gtid
                    header.putGtid(gtidSet, event);
                }
                // update current gtid event to context
                context.setGtidLogEvent(event);
                return event;
            }
        case LogEvent.PREVIOUS_GTIDS_LOG_EVENT:
            {
                PreviousGtidsLogEvent event = new PreviousGtidsLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                return event;
            }
        case LogEvent.TRANSACTION_CONTEXT_EVENT:
            {
                TransactionContextLogEvent event = new TransactionContextLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                return event;
            }
        case LogEvent.VIEW_CHANGE_EVENT:
            {
                ViewChangeEvent event = new ViewChangeEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                return event;
            }
        case LogEvent.XA_PREPARE_LOG_EVENT:
            {
                XaPrepareLogEvent event = new XaPrepareLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                return event;
            }
        case LogEvent.ANNOTATE_ROWS_EVENT:
            {
                AnnotateRowsEvent event = new AnnotateRowsEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                header.putGtid(context.getGtidSet(), gtidLogEvent);
                return event;
            }
        case LogEvent.BINLOG_CHECKPOINT_EVENT:
            {
                BinlogCheckPointLogEvent event = new BinlogCheckPointLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                return event;
            }
        case LogEvent.GTID_EVENT:
            {
                MariaGtidLogEvent event = new MariaGtidLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                if (gtidSet != null) {
                    gtidSet.update(event.getGtidStr());
                    // update latest gtid
                    header.putGtid(gtidSet, event);
                }
                // update current gtid event to context
                context.setGtidLogEvent(event);
                return event;
            }
        case LogEvent.GTID_LIST_EVENT:
            {
                MariaGtidListLogEvent event = new MariaGtidListLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                if (gtidSet != null) {
                    gtidSet.update(event.getGtidStr());
                    // update latest gtid
                    header.putGtid(gtidSet, event);
                }
                // update current gtid event to context
                context.setGtidLogEvent(event);
                return event;
            }
        case LogEvent.START_ENCRYPTION_EVENT:
            {
                StartEncryptionLogEvent event = new StartEncryptionLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                return event;
            }
        default:
            /*
                 * Create an object of Ignorable_log_event for unrecognized
                 * sub-class. So that SLAVE SQL THREAD will only update the
                 * position and continue.
                 */
            if ((buffer.getUint16(LogEvent.FLAGS_OFFSET) & LogEvent.LOG_EVENT_IGNORABLE_F) > 0) {
                IgnorableLogEvent event = new IgnorableLogEvent(header, buffer, descriptionEvent);
                /* updating position in context */
                logPosition.position = header.getLogPos();
                return event;
            } else {
                if (logger.isWarnEnabled()) {
                    logger.warn("Skipping unrecognized binlog event " + LogEvent.getTypeName(header.getType()) + " from: " + context.getLogPosition());
                }
            }
    }
    /* updating position in context */
    logPosition.position = header.getLogPos();
    /* Unknown or unsupported log event */
    return new UnknownLogEvent(header);
}