/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 com.alibaba.jstorm.utils;

import backtype.storm.utils.DisruptorQueue;
import com.alibaba.jstorm.callback.AsyncLoopRunnable;
import com.alibaba.jstorm.callback.RunnableCallback;
import com.lmax.disruptor.EventHandler;
import java.util.concurrent.atomic.AtomicBoolean;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Disruptor Consumer thread
 *
 * @author yannian
 */
public abstract class DisruptorRunable extends RunnableCallback implements EventHandler {
    private final static Logger LOG = LoggerFactory.getLogger(DisruptorRunable.class);

    protected DisruptorQueue queue;
    protected String idStr;
    protected AtomicBoolean shutdown = AsyncLoopRunnable.getShutdown();

    public DisruptorRunable(DisruptorQueue queue, String idStr) {
        this.queue = queue;
        this.idStr = idStr;
    }

    public abstract void handleEvent(Object event, boolean endOfBatch) throws Exception;

    /**
     * This function need to be implements
     *
     * @see com.lmax.disruptor.EventHandler#onEvent(java.lang.Object, long, boolean)
     */
    @Override
    public void onEvent(Object event, long sequence, boolean endOfBatch) throws Exception {
        if (event == null) {
            return;
        }
        handleEvent(event, endOfBatch);
    }

    @Override
    public void run() {
        LOG.info("Successfully start thread " + idStr);
        //queue.consumerStarted();

        while (!shutdown.get()) {
            queue.consumeBatchWhenAvailable(this);
        }
        LOG.info("Successfully exit thread " + idStr);
    }

    @Override
    public void shutdown() {
    }

}