org.apache.hama.bsp.FCFSQueue.java Source code

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Here is the source code for org.apache.hama.bsp.FCFSQueue.java

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/**
 * 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 org.apache.hama.bsp;

import java.util.Collection;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

class FCFSQueue implements Queue<JobInProgress> {

    public static final Log LOG = LogFactory.getLog(FCFSQueue.class);
    private final String name;
    private BlockingQueue<JobInProgress> queue = new LinkedBlockingQueue<JobInProgress>();

    public FCFSQueue(String name) {
        this.name = name;
    }

    @Override
    public String getName() {
        return this.name;
    }

    @Override
    public void addJob(JobInProgress job) {
        try {
            queue.put(job);
        } catch (InterruptedException ie) {
            LOG.error("Fail to add a job to the " + this.name + " queue.", ie);
        }
    }

    @Override
    public void removeJob(JobInProgress job) {
        queue.remove(job);
    }

    @Override
    public JobInProgress removeJob() {
        try {
            return queue.take();
        } catch (InterruptedException ie) {
            LOG.error("Fail to remove a job from the " + this.name + " queue.", ie);
        }
        return null;
    }

    @Override
    public Collection<JobInProgress> jobs() {
        return queue;
    }

}