单列线程池

package com.vivo.finance.vivopay.core.utils;

import java.util.concurrent.Executors;
import java.util.concurrent.LinkedBlockingDeque;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

/**

• @author liusenxiao

• @description 单列线程池异步任务处理器

• @data2019/12/11
  */
  public class ThreadPoolServiceUtil {
  // 核心线程数
  private static final int DEFAULT_CORE_SIZE=10;
  // 最大线程数
  private static final int MAX_QUEUE_SIZE=15;
  private volatile static ThreadPoolExecutor executor;

  /** 空闲线程回收时间 */
  public static final int KEEP_ALIVE_TIME = 5000;

  private ThreadPoolServiceUtil() {};

  // 获取单例的线程池对象
  public static ThreadPoolExecutor getInstance() {
  if (executor == null) {
  synchronized (ThreadPoolServiceUtil.class) {
  if (executor == null) {
  executor = new ThreadPoolExecutor(DEFAULT_CORE_SIZE,
  MAX_QUEUE_SIZE,
  KEEP_ALIVE_TIME,
  TimeUnit.MILLISECONDS,// 时间单位
  new LinkedBlockingDeque(Integer.MAX_VALUE),// 线程队列
  Executors.defaultThreadFactory()// 线程工厂
  );
  }
  }
  }
  return executor;
  }

  public void execute(Runnable runnable) {
  if (runnable == null) {
  return;
  }
  executor.execute(runnable);
  }

  // 从线程队列中移除对象
  public void cancel(Runnable runnable) {
  if (executor != null) {
  executor.getQueue().remove(runnable);
  }
  }
  }