dorkbox.messagebus.synchrony.disruptor.MessageHandler Maven / Gradle / Ivy

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/*
 * Copyright 2015 dorkbox, llc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package dorkbox.messagebus.synchrony.disruptor;

import com.lmax.disruptor.LifecycleAware;
import com.lmax.disruptor.WorkHandler;
import dorkbox.messagebus.synchrony.MessageHolder;

import java.util.concurrent.atomic.AtomicBoolean;

/**
 * @author dorkbox, llc Date: 2/2/15
 */
public
class MessageHandler implements WorkHandler, LifecycleAware {

    private final AtomicBoolean shutdown = new AtomicBoolean(false);

    public
    MessageHandler() {
    }

    @Override
    public
    void onEvent(final MessageHolder event) throws Exception {
        final int messageType = event.type;

        switch (messageType) {
            case MessageType.ONE: {
                event.dispatch.publish(event.message1);
                return;
            }
            case MessageType.TWO: {
                event.dispatch.publish(event.message1, event.message2);
                return;
            }
            case MessageType.THREE: {
                event.dispatch.publish(event.message1, event.message2, event.message3);
                //noinspection UnnecessaryReturnStatement
                return;
            }
        }
    }

    @Override
    public
    void onStart() {
    }

    @Override
    public synchronized
    void onShutdown() {
        shutdown.set(true);
    }

    public
    boolean isShutdown() {
        return shutdown.get();
    }
}