Examples of org.apache.cassandra.concurrent.SingleThreadedStage

org.apache.cassandra.concurrent.SingleThreadedStage
This class is an implementation of the IStage interface. In particular it is for a stage that has a thread pool with a single thread. For details please refer to the IStage documentation.


    StorageLoadBalancer(StorageService storageService)
    {
        storageService_ = storageService;
        /* register the load balancer stage */
        StageManager.registerStage(StorageLoadBalancer.lbStage_, new SingleThreadedStage(StorageLoadBalancer.lbStage_));
        /* register the load balancer verb handler */
        MessagingService.getMessagingInstance().registerVerbHandlers(StorageLoadBalancer.moveMessageVerbHandler_, new MoveMessageVerbHandler());
        /* register with the StorageService */
        storageService_.registerComponentForShutdown(this);
    }

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    /* Timer is used to disseminate load information */
    private Timer loadTimer_ = new Timer(false);


    private StorageLoadBalancer()
    {
        StageManager.registerStage(StorageLoadBalancer.lbStage_, new SingleThreadedStage(StorageLoadBalancer.lbStage_));
        MessagingService.instance().registerVerbHandlers(StorageLoadBalancer.moveMessageVerbHandler_, new MoveMessageVerbHandler());
        Gossiper.instance().register(this);
    }

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    /**
     * Private constructor. Use AntiEntropyService.instance()
     */
    private AntiEntropyService()
    {
        StageManager.registerStage(AE_SERVICE_STAGE, new SingleThreadedStage(AE_SERVICE_STAGE));


        MessagingService.instance().registerVerbHandlers(TREE_REQUEST_VERB, new TreeRequestVerbHandler());
        MessagingService.instance().registerVerbHandlers(TREE_RESPONSE_VERB, new TreeResponseVerbHandler());
        naturalRepairs = new ConcurrentHashMap<CFPair, Long>();
        trees = new HashMap<CFPair, Cachetable<InetAddress, TreePair>>();

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    /* Timer is used to disseminate load information */
    private Timer loadTimer_ = new Timer(false);


    private StorageLoadBalancer()
    {
        StageManager.registerStage(StorageLoadBalancer.lbStage_, new SingleThreadedStage(StorageLoadBalancer.lbStage_));
        MessagingService.instance().registerVerbHandlers(StorageLoadBalancer.moveMessageVerbHandler_, new MoveMessageVerbHandler());
        Gossiper.instance().register(this);
    }

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        MessagingService.instance().registerVerbHandlers(JOIN_VERB_HANDLER, new JoinVerbHandler());
        MessagingService.instance().registerVerbHandlers(GOSSIP_DIGEST_SYN_VERB, new GossipDigestSynVerbHandler());
        MessagingService.instance().registerVerbHandlers(GOSSIP_DIGEST_ACK_VERB, new GossipDigestAckVerbHandler());
        MessagingService.instance().registerVerbHandlers(GOSSIP_DIGEST_ACK2_VERB, new GossipDigestAck2VerbHandler());
        /* register the Gossip stage */
        StageManager.registerStage( Gossiper.GOSSIP_STAGE, new SingleThreadedStage("GMFD") );
    }

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        StageManager.registerStage(StorageService.mutationStage_, new MultiThreadedStage(StorageService.mutationStage_, threadCount));
        StageManager.registerStage(StorageService.readStage_, new MultiThreadedStage(StorageService.readStage_, 2*threadCount));        
        StageManager.registerStage(StorageService.mrStage_, new MultiThreadedStage(StorageService.mrStage_, threadCount));
        /* Stage for handling the HTTP messages. */
        StageManager.registerStage(HttpConnection.httpStage_, new SingleThreadedStage("HTTP-REQUEST"));


        if ( DatabaseDescriptor.isRackAware() )
            nodePicker_ = new RackAwareStrategy(tokenMetadata_);
        else
            nodePicker_ = new RackUnawareStrategy(tokenMetadata_);

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        MessagingService.getMessagingInstance().registerVerbHandlers(JOIN_VERB_HANDLER, new JoinVerbHandler());
        MessagingService.getMessagingInstance().registerVerbHandlers(GOSSIP_DIGEST_SYN_VERB, new GossipDigestSynVerbHandler());
        MessagingService.getMessagingInstance().registerVerbHandlers(GOSSIP_DIGEST_ACK_VERB, new GossipDigestAckVerbHandler());
        MessagingService.getMessagingInstance().registerVerbHandlers(GOSSIP_DIGEST_ACK2_VERB, new GossipDigestAck2VerbHandler());
        /* register the Gossip stage */
        StageManager.registerStage( Gossiper.GOSSIP_STAGE, new SingleThreadedStage("GMFD") );
        /* register with Storage Service for shutdown */
        StorageService.instance().registerComponentForShutdown(this);
    }

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        MessagingService.instance().registerVerbHandlers(JOIN_VERB_HANDLER, new JoinVerbHandler());
        MessagingService.instance().registerVerbHandlers(GOSSIP_DIGEST_SYN_VERB, new GossipDigestSynVerbHandler());
        MessagingService.instance().registerVerbHandlers(GOSSIP_DIGEST_ACK_VERB, new GossipDigestAckVerbHandler());
        MessagingService.instance().registerVerbHandlers(GOSSIP_DIGEST_ACK2_VERB, new GossipDigestAck2VerbHandler());
        /* register the Gossip stage */
        StageManager.registerStage( Gossiper.GOSSIP_STAGE, new SingleThreadedStage("GMFD") );
    }

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    StorageLoadBalancer(StorageService storageService)
    {
        storageService_ = storageService;
        /* register the load balancer stage */
        StageManager.registerStage(StorageLoadBalancer.lbStage_, new SingleThreadedStage(StorageLoadBalancer.lbStage_));
        /* register the load balancer verb handler */
        MessagingService.getMessagingInstance().registerVerbHandlers(StorageLoadBalancer.moveMessageVerbHandler_, new MoveMessageVerbHandler());
    }

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        MessagingService.getMessagingInstance().registerVerbHandlers(JOIN_VERB_HANDLER, new JoinVerbHandler());
        MessagingService.getMessagingInstance().registerVerbHandlers(GOSSIP_DIGEST_SYN_VERB, new GossipDigestSynVerbHandler());
        MessagingService.getMessagingInstance().registerVerbHandlers(GOSSIP_DIGEST_ACK_VERB, new GossipDigestAckVerbHandler());
        MessagingService.getMessagingInstance().registerVerbHandlers(GOSSIP_DIGEST_ACK2_VERB, new GossipDigestAck2VerbHandler());
        /* register the Gossip stage */
        StageManager.registerStage( Gossiper.GOSSIP_STAGE, new SingleThreadedStage("GMFD") );
    }

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Related Classes of org.apache.cassandra.concurrent.SingleThreadedStage

org.apache.cassandra.gms.Gossiper

org.apache.cassandra.service.AntiEntropyService

org.apache.cassandra.service.StorageLoadBalancer

org.apache.cassandra.service.StorageService

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