[JUC-4]ThreadPoolExecutor源码分析

 相关博文:

https://segmentfault.com/a/1190000008693801

https://www.jianshu.com/p/fa1eac9710c8

//构造器1
public ThreadPoolExecutor(int corePoolSize,
                          int maximumPoolSize,
                          long keepAliveTime,
                          TimeUnit unit,
                          BlockingQueue<Runnable> workQueue) {
    this(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue,
         Executors.defaultThreadFactory(), defaultHandler);
}
//构造器2
public ThreadPoolExecutor(int corePoolSize,
                          int maximumPoolSize,
                          long keepAliveTime,
                          TimeUnit unit,
                          BlockingQueue<Runnable> workQueue,
                          RejectedExecutionHandler handler) {
    this(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue,
         Executors.defaultThreadFactory(), handler);
}
//构造器3
public ThreadPoolExecutor(int corePoolSize, int maximumPoolSize,
 long keepAliveTime, TimeUnit unit, 
 BlockingQueue<Runnable> workQueue, 
 ThreadFactory threadFactory, RejectedExecutionHandler handler);

构造器参数详解如下:
corePoolSize:核心线程的数量;
maximumPoolSize:最大的线程数量;
keepAliveTime:当线程数量大于corePoolSize时,多余的线程的最大存活时间(如果空闲的话);
unit:keepAliveTime的单位;
workQueue:提交但尚未被执行的任务队列;
threadFactory:线程工厂,用于创建线程;
handler:拒绝策略,当任务提交不能被执行时的补救措施;

 

线程池大小设置

https://www.cnblogs.com/lengender-12/p/6869554.html

http://ifeve.com/how-to-calculate-threadpool-size/

posted @ 2019-04-09 15:54  予我渡北川  阅读(152)  评论(0编辑  收藏  举报