Examples of org.apache.zookeeper.server.RequestProcessor

org.apache.zookeeper.server.RequestProcessor
RequestProcessors are chained together to process transactions. Requests are always processed in order. The standalone server, follower, and leader all have slightly different RequestProcessors changed together. Requests always move forward through the chain of RequestProcessors. Requests are passed to a RequestProcessor through processRequest(). Generally method will always be invoked by a single thread. When shutdown is called, the request RequestProcessor should also shutdown any RequestProcessors that it is connected to.

    @Override
    protected void setupRequestProcessors() {      
        // We might consider changing the processor behaviour of 
        // Observers to, for example, remove the disk sync requirements.
        // Currently, they behave almost exactly the same as followers.
        RequestProcessor finalProcessor = new FinalRequestProcessor(this);
        commitProcessor = new CommitProcessor(finalProcessor,
                Long.toString(getServerId()), true);
        commitProcessor.start();
        firstProcessor = new ObserverRequestProcessor(this, commitProcessor);
        ((ObserverRequestProcessor) firstProcessor).start();

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        return self.leader;
    }


    @Override
    protected void setupRequestProcessors() {
        RequestProcessor finalProcessor = new FinalRequestProcessor(this);
        RequestProcessor toBeAppliedProcessor = new Leader.ToBeAppliedRequestProcessor(finalProcessor, getLeader());
        commitProcessor = new CommitProcessor(toBeAppliedProcessor,
                Long.toString(getServerId()), false);
        commitProcessor.start();
        ProposalRequestProcessor proposalProcessor = new ProposalRequestProcessor(this,
                commitProcessor);

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        return self.follower;
    }


    @Override
    protected void setupRequestProcessors() {
        RequestProcessor finalProcessor = new FinalRequestProcessor(this);
        commitProcessor = new CommitProcessor(finalProcessor,
                Long.toString(getServerId()), true);
        commitProcessor.start();
        firstProcessor = new FollowerRequestProcessor(this, commitProcessor);
        ((FollowerRequestProcessor) firstProcessor).start();

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        this.self = self;
    }


    @Override
    protected void setupRequestProcessors() {
        RequestProcessor finalProcessor = new FinalRequestProcessor(this);
        RequestProcessor prepProcessor = new PrepRequestProcessor(this, finalProcessor);
        ((PrepRequestProcessor) prepProcessor).start();
        firstProcessor = new ReadOnlyRequestProcessor(this, prepProcessor);
        ((ReadOnlyRequestProcessor) firstProcessor).start();
    }

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Related Classes of org.apache.zookeeper.server.RequestProcessor

org.apache.zookeeper.server.quorum.CommitProcessorConcurrencyTest$MockCommitProcessor

org.apache.zookeeper.server.quorum.CommitProcessorTest$TestZooKeeperServer

org.apache.zookeeper.server.quorum.FollowerZooKeeperServer

org.apache.zookeeper.server.quorum.LeaderZooKeeperServer

org.apache.zookeeper.server.quorum.ObserverZooKeeperServer

org.apache.zookeeper.server.quorum.ReadOnlyZooKeeperServer

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