com.netflix.eureka2.client.channel.InterestChannelInvoker Maven / Gradle / Ivy

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package com.netflix.eureka2.client.channel;

import com.netflix.eureka2.interests.Interest;
import com.netflix.eureka2.registry.InstanceInfo;
import com.netflix.eureka2.service.InterestChannel;
import com.netflix.eureka2.utils.SerializedTaskInvoker;
import rx.Observable;

import java.util.concurrent.Callable;

/**
 * A decorator of {@link InterestChannel} which delegates to an actual {@link InterestChannel} making sure that all
 * operations on the underlying channel are strictly sequenced in the order they arrive on this channel.
 *
 * @author Nitesh Kant
 */
/*pkg-private: Used by EurekaClientService only*/class InterestChannelInvoker extends SerializedTaskInvoker
        implements ClientInterestChannel {

    private final ClientInterestChannel delegate;

    InterestChannelInvoker(ClientInterestChannel delegate) {
        this.delegate = delegate;
    }

    @Override
    public Observable change(final Interest newInterest) {
        return submitForAck(new Callable>() {
            @Override
            public Observable call() throws Exception {
                return delegate.change(newInterest);
            }
        });
    }

    @Override
    public void close() {
        try {
            shutdown();
        } finally {
            delegate.close();
        }
    }

    @Override
    public Observable asLifecycleObservable() {
        return delegate.asLifecycleObservable();
    }

    @Override
    public Observable appendInterest(final Interest toAppend) {
        return submitForAck(new Callable>() {
            @Override
            public Observable call() throws Exception {
                return delegate.appendInterest(toAppend);
            }
        });
    }

    @Override
    public Observable removeInterest(final Interest toRemove) {
        return submitForAck(new Callable>() {
            @Override
            public Observable call() throws Exception {
                return delegate.removeInterest(toRemove);
            }
        });
    }
}