com.taobao.tddl.dbsync.binlog.event

类 HeartbeatLogEvent

java.lang.Object

com.taobao.tddl.dbsync.binlog.LogEvent

com.taobao.tddl.dbsync.binlog.event.HeartbeatLogEvent

public class HeartbeatLogEvent
extends LogEvent

 Replication event to ensure to slave that master is alive.
   The event is originated by master's dump thread and sent straight to
   slave without being logged. Slave itself does not store it in relay log
   but rather uses a data for immediate checks and throws away the event.
 
   Two members of the class log_ident and Log_event::log_pos comprise

从以下版本开始:

mysql 5.6

版本:

1.0.3

作者:

jianghang 2013-4-8 上午12:36:29

另请参阅:

event_coordinates instance. The coordinates that a heartbeat instance carries correspond to the last event master has sent from its binlog.

字段概要

字段

限定符和类型	字段和说明
static int	FN_REFLEN

从类继承的字段 com.taobao.tddl.dbsync.binlog.LogEvent

ANNOTATE_ROWS_EVENT, ANONYMOUS_GTID_LOG_EVENT, APPEND_BLOCK_EVENT, BEGIN_LOAD_QUERY_EVENT, BINLOG_CHECKPOINT_EVENT, BINLOG_CHECKSUM_ALG_CRC32, BINLOG_CHECKSUM_ALG_DESC_LEN, BINLOG_CHECKSUM_ALG_ENUM_END, BINLOG_CHECKSUM_ALG_OFF, BINLOG_CHECKSUM_ALG_UNDEF, BINLOG_CHECKSUM_LEN, BINLOG_VERSION, CHECKSUM_CRC32_SIGNATURE_LEN, CREATE_FILE_EVENT, DELETE_FILE_EVENT, DELETE_ROWS_EVENT, DELETE_ROWS_EVENT_V1, ENUM_END_EVENT, EVENT_LEN_OFFSET, EVENT_TYPE_OFFSET, EXEC_LOAD_EVENT, EXECUTE_LOAD_QUERY_EVENT, EXTRA_ROW_INFO_FORMAT_OFFSET, EXTRA_ROW_INFO_HDR_BYTES, EXTRA_ROW_INFO_LEN_OFFSET, EXTRA_ROW_INFO_MAX_PAYLOAD, FLAGS_OFFSET, FORMAT_DESCRIPTION_EVENT, GTID_EVENT, GTID_LIST_EVENT, GTID_LOG_EVENT, header, HEARTBEAT_LOG_EVENT, IGNORABLE_LOG_EVENT, INCIDENT_EVENT, INTVAR_EVENT, LOAD_EVENT, LOG_EVENT_IGNORABLE_F, LOG_POS_OFFSET, logger, MARIA_EVENTS_BEGIN, MARIA_SLAVE_CAPABILITY_ANNOTATE, MARIA_SLAVE_CAPABILITY_BINLOG_CHECKPOINT, MARIA_SLAVE_CAPABILITY_GTID, MARIA_SLAVE_CAPABILITY_MINE, MARIA_SLAVE_CAPABILITY_TOLERATE_HOLES, MARIA_SLAVE_CAPABILITY_UNKNOWN, MYSQL_EVENTS_END, MYSQL_TYPE_BIT, MYSQL_TYPE_BLOB, MYSQL_TYPE_DATE, MYSQL_TYPE_DATETIME, MYSQL_TYPE_DATETIME2, MYSQL_TYPE_DECIMAL, MYSQL_TYPE_DOUBLE, MYSQL_TYPE_ENUM, MYSQL_TYPE_FLOAT, MYSQL_TYPE_GEOMETRY, MYSQL_TYPE_INT24, MYSQL_TYPE_JSON, MYSQL_TYPE_LONG, MYSQL_TYPE_LONG_BLOB, MYSQL_TYPE_LONGLONG, MYSQL_TYPE_MEDIUM_BLOB, MYSQL_TYPE_NEWDATE, MYSQL_TYPE_NEWDECIMAL, MYSQL_TYPE_NULL, MYSQL_TYPE_SET, MYSQL_TYPE_SHORT, MYSQL_TYPE_STRING, MYSQL_TYPE_TIME, MYSQL_TYPE_TIME2, MYSQL_TYPE_TIMESTAMP, MYSQL_TYPE_TIMESTAMP2, MYSQL_TYPE_TINY, MYSQL_TYPE_TINY_BLOB, MYSQL_TYPE_VAR_STRING, MYSQL_TYPE_VARCHAR, MYSQL_TYPE_YEAR, NEW_LOAD_EVENT, PARTIAL_UPDATE_ROWS_EVENT, PRE_GA_DELETE_ROWS_EVENT, PRE_GA_UPDATE_ROWS_EVENT, PRE_GA_WRITE_ROWS_EVENT, PREVIOUS_GTIDS_LOG_EVENT, QUERY_EVENT, QUERY_HEADER_LEN, QUERY_HEADER_MINIMAL_LEN, RAND_EVENT, ROTATE_EVENT, ROWS_QUERY_LOG_EVENT, semival, SERVER_ID_OFFSET, SERVER_VERSION, SLAVE_EVENT, START_ENCRYPTION_EVENT, START_EVENT_V3, STOP_EVENT, TABLE_MAP_EVENT, TRANSACTION_CONTEXT_EVENT, UNKNOWN_EVENT, UPDATE_ROWS_EVENT, UPDATE_ROWS_EVENT_V1, USER_VAR_EVENT, VIEW_CHANGE_EVENT, WRITE_ROWS_EVENT, WRITE_ROWS_EVENT_V1, XA_PREPARE_LOG_EVENT, XID_EVENT

构造器概要

构造器

构造器和说明
HeartbeatLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent)

方法概要

限定符和类型	方法和说明
int	getIdentLen()
java.lang.String	getLogIdent()

从类继承的方法 com.taobao.tddl.dbsync.binlog.LogEvent

getEventLen, getHeader, getLogPos, getSemival, getServerId, getTypeName, getWhen, setSemival

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

FN_REFLEN

public static final int FN_REFLEN

另请参阅:

常量字段值

构造器详细资料

HeartbeatLogEvent

public HeartbeatLogEvent(LogHeader header,
                         LogBuffer buffer,
                         FormatDescriptionLogEvent descriptionEvent)

方法详细资料

getIdentLen

public int getIdentLen()

getLogIdent

public java.lang.String getLogIdent()