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A java client for the MockServer

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package org.mockserver.client;

import com.google.common.collect.LinkedListMultimap;
import com.google.common.collect.Multimap;

/**
 * A publish/subscribe communication channel between {@link MockServerClient} and {@link ForwardChainExpectation} instances
 *
 * @author albans
 */
final class MockServerEventBus {
    private static MockServerEventBus instance;

    private final Multimap subscribers = LinkedListMultimap.create();

    private MockServerEventBus() {
    }

    public static MockServerEventBus getInstance() {
        if (instance == null) {
            instance = new MockServerEventBus();
        }
        return instance;
    }

    void publish(EventType event) {
        for (SubscriberHandler subscriber : subscribers.get(event)) {
            subscriber.handle();
        }
    }

    public void subscribe(SubscriberHandler subscriber, EventType... events) {
        for (EventType event : events) {
            subscribers.put(event, subscriber);
        }
    }

    enum EventType {
        STOP, RESET;
    }

    interface SubscriberHandler {
        void handle();
    }
}