com.google.code.gerrytan.executorservice.HeavyTaskRunner.java Source code

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Here is the source code for com.google.code.gerrytan.executorservice.HeavyTaskRunner.java

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/*
 * Copyright 2012 Gerry Tan (http://gerrytan.wordpress.com)
 * 
 * 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 com.google.code.gerrytan.executorservice;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import org.springframework.stereotype.Component;

/**
 * Demonstrate a task runner service that utilizes thread pool obtained from executor
 * service API
 */
@Component
public class HeavyTaskRunner {
    private ExecutorService executorService;
    private static final int NUM_THREADS = 2;
    private int taskCounter = 1;

    public HeavyTaskRunner() {
        executorService = Executors.newFixedThreadPool(NUM_THREADS);
    }

    /**
     * Create a new {@link HeavyTask} and submit it to thread pool for execution
     */
    public int runTask() {
        int nextTaskId;
        synchronized (this) {
            nextTaskId = taskCounter++;
        }
        executorService.submit(new HeavyTask(nextTaskId));
        return nextTaskId;
    }
}