Examples of com.taobao.tddl.dbsync.binlog.event.LogHeader

Package com.taobao.tddl.dbsync.binlog.event

Examples of com.taobao.tddl.dbsync.binlog.event.LogHeader

com.taobao.tddl.dbsync.binlog.event.LogHeader

The Common-Header, documented in the table @ref Table_common_header "below", always has the same form and length within one version of MySQL. Each event type specifies a format and length of the Post-Header. The length of the Common-Header is the same for all events of the same type. The Body may be of different format and length even for different events of the same type. The binary formats of Post-Header and Body are documented separately in each subclass. The binary format of Common-Header is as follows.

Common-Header
Name	Format	Description
timestamp	4 byte unsigned integer	The time when the query started, in seconds since 1970.
type	1 byte enumeration	See enum #Log_event_type.
server_id	4 byte unsigned integer	Server ID of the server that created the event.
total_size	4 byte unsigned integer	The total size of this event, in bytes. In other words, this is the sum of the sizes of Common-Header, Post-Header, and Body.
master_position	4 byte unsigned integer	The position of the next event in the master binary log, in bytes from the beginning of the file. In a binlog that is not a relay log, this is just the position of the next event, in bytes from the beginning of the file. In a relay log, this is the position of the next event in the master's binlog.
flags	2 byte bitfield	See Log_event::flags.

Summing up the numbers above, we see that the total size of the common header is 19 bytes. @see mysql-5.1.60/sql/log_event.cc @author Changyuan.lh @version 1.0

    {
        final int limit = buffer.limit();


        if (limit >= FormatDescriptionLogEvent.LOG_EVENT_HEADER_LEN)
        {
            LogHeader header = new LogHeader(buffer,
                    context.getFormatDescription());


            final int len = header.getEventLen();
            if (limit >= len)
            {
                LogEvent event;


                /* Checking binary-log's header */
                if (handleSet.get(header.getType()))
                {
                    buffer.limit(len);


                    try
                    {
                        /* Decoding binary-log to event */
                        event = decode(buffer, header, context);
                    }
                    catch (IOException e)
                    {
                        if (logger.isWarnEnabled())
                            logger.warn("Decoding "
                                    + LogEvent.getTypeName(header.getType())
                                    + " failed from: "
                                    + context.getLogPosition(), e);
                        throw e;
                    }
                    finally

View Full Code Here

    {
        final int limit = buffer.limit();


        if (limit >= FormatDescriptionLogEvent.LOG_EVENT_HEADER_LEN)
        {
            LogHeader header = new LogHeader(buffer,
                    context.getFormatDescription());


            final int len = header.getEventLen();
            if (limit >= len)
            {
                LogEvent event;


                /* Checking binary-log's header */
                if (handleSet.get(header.getType()))
                {
                    buffer.limit(len);
                    try
                    {
                        /* Decoding binary-log to event */
                        event = decode(buffer, header, context);
                    }
                    catch (IOException e)
                    {
                        if (logger.isWarnEnabled())
                            logger.warn("Decoding "
                                    + LogEvent.getTypeName(header.getType())
                                    + " failed from: "
                                    + context.getLogPosition(), e);
                        throw e;
                    }
                    finally

View Full Code Here

    {
        final int limit = buffer.limit();


        if (limit >= FormatDescriptionLogEvent.LOG_EVENT_HEADER_LEN)
        {
            LogHeader header = new LogHeader(buffer,
                    context.getFormatDescription());


            final int len = header.getEventLen();
            if (limit >= len)
            {
                LogEvent event;


                /* Checking binary-log's header */
                if (handleSet.get(header.getType()))
                {
                    buffer.limit(len);
                    try
                    {
                        /* Decoding binary-log to event */
                        event = decode(buffer, header, context);
                    }
                    catch (IOException e)
                    {
                        if (logger.isWarnEnabled())
                            logger.warn("Decoding "
                                    + LogEvent.getTypeName(header.getType())
                                    + " failed from: "
                                    + context.getLogPosition(), e);
                        throw e;
                    }
                    finally

View Full Code Here

TOP

Related Classes of com.taobao.tddl.dbsync.binlog.event.LogHeader

com.taobao.tddl.dbsync.binlog.LogDecoder

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.