com.alibaba.rocketmq.client.impl.consumer

类 PullAPIWrapper

java.lang.Object

com.alibaba.rocketmq.client.impl.consumer.PullAPIWrapper

public class PullAPIWrapper
extends Object

对Pull接口进行进一步的封装

从以下版本开始:

2013-7-24

作者:

shijia.wxr

构造器概要

构造器

构造器和说明
PullAPIWrapper(MQClientFactory mQClientFactory, String consumerGroup)

方法概要

方法

限定符和类型	方法和说明
PullResult	processPullResult(MessageQueue mq, PullResult pullResult, SubscriptionData subscriptionData) 对拉取结果进行处理，主要是消息反序列化
PullResult	pullKernelImpl(MessageQueue mq, String subExpression, long subVersion, long offset, int maxNums, int sysFlag, long commitOffset, long brokerSuspendMaxTimeMillis, long timeoutMillis, CommunicationMode communicationMode, PullCallback pullCallback)
long	recalculatePullFromWhichNode(MessageQueue mq) 每个队列都应该有相应的变量来保存从哪个服务器拉
void	updatePullFromWhichNode(MessageQueue mq, long brokerId)

从类继承的方法 java.lang.Object

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

构造器详细资料

PullAPIWrapper

public PullAPIWrapper(MQClientFactory mQClientFactory,
              String consumerGroup)

方法详细资料

updatePullFromWhichNode

public void updatePullFromWhichNode(MessageQueue mq,
                           long brokerId)

processPullResult

public PullResult processPullResult(MessageQueue mq,
                           PullResult pullResult,
                           SubscriptionData subscriptionData)

对拉取结果进行处理，主要是消息反序列化

参数:

mq -

pullResult -

subscriptionData -

projectGroupPrefix - 虚拟环境projectGroupPrefix，不存在可设置为 null

返回:

recalculatePullFromWhichNode

public long recalculatePullFromWhichNode(MessageQueue mq)

每个队列都应该有相应的变量来保存从哪个服务器拉

pullKernelImpl

public PullResult pullKernelImpl(MessageQueue mq,
                        String subExpression,
                        long subVersion,
                        long offset,
                        int maxNums,
                        int sysFlag,
                        long commitOffset,
                        long brokerSuspendMaxTimeMillis,
                        long timeoutMillis,
                        CommunicationMode communicationMode,
                        PullCallback pullCallback)
                          throws MQClientException,
                                 com.alibaba.rocketmq.remoting.exception.RemotingException,
                                 MQBrokerException,
                                 InterruptedException

抛出:

MQClientException

com.alibaba.rocketmq.remoting.exception.RemotingException

MQBrokerException

InterruptedException