Examples of org.apache.curator.framework.recipes.atomic.DistributedAtomicLong

Package org.apache.curator.framework.recipes.atomic

Examples of org.apache.curator.framework.recipes.atomic.DistributedAtomicLong

org.apache.curator.framework.recipes.atomic.DistributedAtomicLong

A counter that attempts atomic increments. It first tries uses optimistic locking. If that fails, an optional {@link InterProcessMutex} is taken. For both optimistic and mutex, a retry policy is used toretry the increment.

The various increment methods return an {@link AtomicValue} object. You must always check{@link AtomicValue#succeeded()}. None of the methods (other than get()) are guaranteed to succeed.


        super.init(); // super.init() must be called after setControlTree()
    }


    private void initRefIdCounter() throws Exception {
        this.refIdCounter = new DistributedAtomicLong(client, REF_COUNTER, retryPolicy);
        AtomicValue<Long> av;


        av = refIdCounter.increment(); // we need this b/c refIdCounter.compareAndSet(0, INITIAL_REF_ID) doesn't work on a newly allocated znode.
        if (!av.succeeded())
            throw new RuntimeException("Error initializing refIdCounter");

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        super.init(services);
        try {
            zk = ZKUtils.register(this);
            PromotedToLock.Builder lockBuilder = PromotedToLock.builder().lockPath(getPromotedLock())
                    .retryPolicy(getRetryPolicy()).timeout(Service.lockTimeout, TimeUnit.MILLISECONDS);
            atomicIdGenerator = new DistributedAtomicLong(zk.getClient(), ZK_SEQUENCE_PATH, getRetryPolicy(),
                    lockBuilder.build());


        }
        catch (Exception ex) {
            throw new ServiceException(ErrorCode.E1700, ex.getMessage(), ex);

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        super.init(); // super.init() must be called after setControlTree()
    }


    private void initRefIdCounter() throws Exception {
        this.refIdCounter = new DistributedAtomicLong(client, REF_COUNTER, retryPolicy);
        AtomicValue<Long> av;


        av = refIdCounter.increment(); // we need this b/c refIdCounter.compareAndSet(0, INITIAL_REF_ID) doesn't work on a newly allocated znode.
        if (!av.succeeded())
            throw new RuntimeException("Error initializing refIdCounter");

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