com.alibaba.rocketmq.store
类 CommitLog

java.lang.Object
  com.alibaba.rocketmq.store.CommitLog

public class CommitLog
extends Object

Store all metadata downtime for recovery, data protection reliability

从以下版本开始：

2013-7-21

作者：

shijia.wxr

嵌套类摘要

class

CommitLog.GroupCommitRequest

字段摘要

static int

MessageMagicCode

构造方法摘要

CommitLog(DefaultMessageStore defaultMessageStore)

方法摘要

boolean	appendData(long startOffset, byte[] data)
DispatchRequest	checkMessageAndReturnSize(ByteBuffer byteBuffer, boolean checkCRC)
DispatchRequest	checkMessageAndReturnSize(ByteBuffer byteBuffer, boolean checkCRC, boolean readBody) check the message and returns the message size
int	deleteExpiredFile(long expiredTime, int deleteFilesInterval, long intervalForcibly, boolean cleanImmediately)
void	destroy()
SelectMapedBufferResult	getData(long offset) Read CommitLog data, use data replication
SelectMapedBufferResult	getData(long offset, boolean returnFirstOnNotFound)
long	getMaxOffset()
SelectMapedBufferResult	getMessage(long offset, int size)
long	getMinOffset()
HashMap<String,Long>	getTopicQueueTable()
boolean	load()
long	pickupStoretimestamp(long offset, int size) According to receive certain message or offset storage time if an error occurs, it returns -1
PutMessageResult	putMessage(MessageExtBrokerInner msg)
void	recoverAbnormally()
void	recoverNormally() When the normal exit, data recovery, all memory data have been flush
void	removeQueurFromTopicQueueTable(String topic, int queueId)
boolean	retryDeleteFirstFile(long intervalForcibly)
long	rollNextFile(long offset)
void	setTopicQueueTable(HashMap<String,Long> topicQueueTable)
void	shutdown()
void	start()

从类 java.lang.Object 继承的方法

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

字段详细信息

MessageMagicCode

public static final int MessageMagicCode

另请参见：

常量字段值

构造方法详细信息

CommitLog

public CommitLog(DefaultMessageStore defaultMessageStore)

方法详细信息

load

public boolean load()

start

public void start()

shutdown

public void shutdown()

getMinOffset

public long getMinOffset()

rollNextFile

public long rollNextFile(long offset)

getMaxOffset

public long getMaxOffset()

deleteExpiredFile

public int deleteExpiredFile(long expiredTime,
                             int deleteFilesInterval,
                             long intervalForcibly,
                             boolean cleanImmediately)

getData

public SelectMapedBufferResult getData(long offset)

Read CommitLog data, use data replication

getData

public SelectMapedBufferResult getData(long offset,
                                       boolean returnFirstOnNotFound)

recoverNormally

public void recoverNormally()

When the normal exit, data recovery, all memory data have been flush

checkMessageAndReturnSize

public DispatchRequest checkMessageAndReturnSize(ByteBuffer byteBuffer,
                                                 boolean checkCRC)

checkMessageAndReturnSize

public DispatchRequest checkMessageAndReturnSize(ByteBuffer byteBuffer,
                                                 boolean checkCRC,
                                                 boolean readBody)

check the message and returns the message size

返回：

0 Come the end of the file // >0 Normal messages // -1 Message checksum failure

recoverAbnormally

public void recoverAbnormally()

putMessage

public PutMessageResult putMessage(MessageExtBrokerInner msg)

pickupStoretimestamp

public long pickupStoretimestamp(long offset,
                                 int size)

According to receive certain message or offset storage time if an error occurs, it returns -1

getMessage

public SelectMapedBufferResult getMessage(long offset,
                                          int size)

getTopicQueueTable

public HashMap<String,Long> getTopicQueueTable()

setTopicQueueTable

public void setTopicQueueTable(HashMap<String,Long> topicQueueTable)

destroy

public void destroy()

appendData

public boolean appendData(long startOffset,
                          byte[] data)

retryDeleteFirstFile

public boolean retryDeleteFirstFile(long intervalForcibly)

removeQueurFromTopicQueueTable

public void removeQueurFromTopicQueueTable(String topic,
                                           int queueId)