Gossiper channel的运用_gossip channel-优快云博客

本文链接：https://blog.youkuaiyun.com/anycom/article/details/7310813

本文详细介绍了在系统中如何实现节点间的高效通知机制，包括注册特定的词汇处理器来处理Gossip协议中的消息，如消化摘要同步和确认。文章还讨论了消息接收过程中的流程管理和任务调度，确保不同阶段的消息能够正确处理。

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节点间的通知

ch.ethz.systems.cloudy2.server.components.gossiper.cassandra.Gossiper.load()

{

...

   CloudyFactory.getMessaging().registerVerbHandler(GOSSIP_DIGEST_SYN_VERB, new GossipDigestSynVerbHandler());
  CloudyFactory.getMessaging().registerVerbHandler(GOSSIP_DIGEST_ACK_VERB, new GossipDigestAckVerbHandler());
  CloudyFactory.getMessaging().registerVerbHandler(GOSSIP_DIGEST_ACK2_VERB, new GossipDigestAck2VerbHandler());
....

}

调用

public static void receive(Message message) {
  if (CloudyFactory.getTestingComponent().isSleeping())
   return;

        Runnable runnable = new MessageDeliveryTask(message);

        ExecutorService stage = StageManager.getStage(message.getStage());
        if (stage == null)
        {
            if (logger_.isDebugEnabled())
                logger_.debug("Running " + message.getStage() + " on default stage");
            messageDeserializerExecutor_.execute(runnable);
        }
        else
        {
            stage.execute(runnable);
        }
    }

public class MessageDeliveryTask implements Runnable
{
    private Message message_;

    public MessageDeliveryTask(Message message)
    {
        message_ = message;
    }

    public void run()
    {
        String verb = message_.getVerb();
        IVerbHandler verbHandler = MessagingService.getInstance().getVerbHandler(verb);
        if (verbHandler == null) {
        logger_.warn("Unknown verb " + verb + ". No processing occurs");
        } else {
        verbHandler.doVerb(message_);
        }
       // System.out.println("PUT 2"+Thread.currentThread().getName());
    }
}

applicationState