Donald_Draper的专栏

绝策略等）：[url]http://donald-draper.iteye.com/blog/2367064[/url]ThreadPoolExecutor解析三（线程池执行提交任务）：[url]http://donald-draper.iteye.com/blog/2367199[/url]ThreadPoolExecutor解析四（线程池关闭）：[url]http://donald-draper.iteye.com/blog/2367246[/url]ScheduledThrea

.PrivilegedAction;import java.security.PrivilegedExceptionAction;/** * An {@link Executor} that provides methods to manage termination and * methods that can produce a {@link Future} for tracking progress of * one or more asynchronous tasks.E

f how each task will be run, including details of thread * use, scheduling, etc. An Executor is normally used * instead of explicitly creating threads. For example, rather than * invoking new Thread(new(RunnableTask())).start() for each * of a set

llerRunsPolicy，下面我们用一个实例来测试一下这几种策略：测试实例：[code="java"]package juc.executor;import java.lang.reflect.Field;import java.util.concurrent.ArrayBlockingQueue;import java.util.concurrent.ThreadPoolExecutor;import java.util.concurrent.Thr

ld-draper.iteye.com/blog/2363874[/url]BlockingQueue接口的定义：[url]http://donald-draper.iteye.com/blog/2363942[/url]LinkedBlockingQueue解析：[url]http://donald-draper.iteye.com/blog/2364007[/url]ArrayBlockingQueue解析：[url]http://donald-draper.iteye.com/blog/2

ld-draper.iteye.com/blog/2363874[/url]BlockingQueue接口的定义：[url]http://donald-draper.iteye.com/blog/2363942[/url]LinkedBlockingQueue解析：[url]http://donald-draper.iteye.com/blog/2364007[/url]ArrayBlockingQueue解析：[url]http://donald-draper.iteye.com/blog/2

ld-draper.iteye.com/blog/2363874[/url]BlockingQueue接口的定义：[url]http://donald-draper.iteye.com/blog/2363942[/url]LinkedBlockingQueue解析：[url]http://donald-draper.iteye.com/blog/2364007[/url]ArrayBlockingQueue解析：[url]http://donald-draper.iteye.com/blog/2

ld-draper.iteye.com/blog/2363874[/url]BlockingQueue接口的定义：[url]http://donald-draper.iteye.com/blog/2363942[/url]LinkedBlockingQueue解析：[url]http://donald-draper.iteye.com/blog/2364007[/url]ArrayBlockingQueue解析：[url]http://donald-draper.iteye.com/blog/2

ld-draper.iteye.com/blog/2363874[/url]BlockingQueue接口的定义：[url]http://donald-draper.iteye.com/blog/2363942[/url]LinkedBlockingQueue解析：[url]http://donald-draper.iteye.com/blog/2364007[/url]ArrayBlockingQueue解析：[url]http://donald-draper.iteye.com/blog/2

ld-draper.iteye.com/blog/2363874[/url]BlockingQueue接口的定义：[url]http://donald-draper.iteye.com/blog/2363942[/url]LinkedBlockingQueue解析：[url]http://donald-draper.iteye.com/blog/2364007[/url][code="java"]package java.util.concurrent;import ja

ld-draper.iteye.com/blog/2363874[/url]BlockingQueue接口的定义：[url]http://donald-draper.iteye.com/blog/2363942[/url][code="java"]package java.util.concurrent;import java.util.concurrent.atomic.AtomicInteger;import java.util.concurrent.locks.

ld-draper.iteye.com/blog/2363874[/url][code="java"]/* * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. * * Written by Doug Lea with assistance from members of JCP JSR-166 * Expert Group and released to the public doma

/1.0/ */package java.util.concurrent;/** * A Future represents the result of an asynchronous * computation. Methods are provided to check if the computation is * complete, to wait for its completion, and to retrieve the result of * the c

th methods to start and cancel * a computation, query to see if the computation is complete, and * retrieve the result of the computation. The result can only be * retrieved when the computation has completed; the get * method will block if the co

/donald-draper.iteye.com/blog/2367593[/url]前面一篇文章，我们看了任务的调度，先回顾一下： 从调度线程池执行器的构造来看，核心线程池数量是必须设置的，线程工厂和拒绝策略可选，默认最大线程池数量为 Integer.MAX_VALUE，保活时间为0，即不存在空闲的任务线程，任务队列为DelayedWorkQueue。 scheduleAtFixedRate方法首先根据任务command和任务执行系统时间，及任务间隔时间period，构造调度任

，任务队列，先来回顾一下 ScheduledFutureTask用一个序列号标识延时任务的执行编号，以保证任务的调度按照FIFO的顺序，用time记录任务执行的系统时间，period是任务执行间隔时间，用于计算下一次任务执行系统时间，outerTask为实际的调度任务，heapIndex为任务在队列的索引。调度线程池执行器用DelayedWorkQueue来存储调度任务，DelayedWorkQueue与延时队列DelayedQueue有点像，一个可重入锁控制队列的并发访问，一个availabl

/donald-draper.iteye.com/blog/2365798[/url]FutureTask解析：[url]http://donald-draper.iteye.com/blog/2365980[/url]CompletionService接口定义：[url]http://donald-draper.iteye.com/blog/2366239[/url]ExecutorCompletionService解析：[url]http://donald-draper.iteye.com/

/donald-draper.iteye.com/blog/2365798[/url]FutureTask解析：[url]http://donald-draper.iteye.com/blog/2365980[/url]CompletionService接口定义：[url]http://donald-draper.iteye.com/blog/2366239[/url]ExecutorCompletionService解析：[url]http://donald-draper.iteye.com/

/donald-draper.iteye.com/blog/2365798[/url]FutureTask解析：[url]http://donald-draper.iteye.com/blog/2365980[/url]CompletionService接口定义：[url]http://donald-draper.iteye.com/blog/2366239[/url]ExecutorCompletionService解析：[url]http://donald-draper.iteye.com/

/donald-draper.iteye.com/blog/2365798[/url]FutureTask解析：[url]http://donald-draper.iteye.com/blog/2365980[/url]CompletionService接口定义：[url]http://donald-draper.iteye.com/blog/2366239[/url]ExecutorCompletionService解析：[url]http://donald-draper.iteye.com/

/donald-draper.iteye.com/blog/2365798[/url]FutureTask解析：[url]http://donald-draper.iteye.com/blog/2365980[/url]CompletionService接口定义：[url]http://donald-draper.iteye.com/blog/2366239[/url]ExecutorCompletionService解析：[url]http://donald-draper.iteye.com/

/donald-draper.iteye.com/blog/2365798[/url]FutureTask解析：[url]http://donald-draper.iteye.com/blog/2365980[/url]CompletionService接口定义：[url]http://donald-draper.iteye.com/blog/2366239[/url]ExecutorCompletionService解析：[url]http://donald-draper.iteye.com/

/donald-draper.iteye.com/blog/2365798[/url]FutureTask解析：[url]http://donald-draper.iteye.com/blog/2365980[/url]CompletionService接口定义：[url]http://donald-draper.iteye.com/blog/2366239[/url]ExecutorCompletionService解析：[url]http://donald-draper.iteye.com/

/donald-draper.iteye.com/blog/2365798[/url]FutureTask解析：[url]http://donald-draper.iteye.com/blog/2365980[/url]CompletionService接口定义：[url]http://donald-draper.iteye.com/blog/2366239[/url][code="java"]package java.util.concurrent;/**

/donald-draper.iteye.com/blog/2365798[/url]FutureTask解析：[url]http://donald-draper.iteye.com/blog/2365980[/url][code="java"]package java.util.concurrent;/** * A service that decouples the production of new asynchronous tasks * from the

import java.util.AbstractQueue;import java.util.ArrayList;import java.util.Collection;import java.util.Iterator;import java.util.NoSuchElementException;import java.util.Queue;/** * An unbounded thread-safe {@linkplain Queue queue} based on

e from members of JCP JSR-166 * Expert Group and released to the public domain, as explained at * http://creativecommons.org/publicdomain/zero/1.0/ */package java.util;/** * This class provides skeletal implementations of some {@link Queue}

c domain, as explained at * http://creativecommons.org/publicdomain/zero/1.0/ */package java.util;/** * A collection designed for holding elements prior to processing. * Besides basic {@link java.util.Collection Collection} operations, *

辅助类LockSupport：[url]http://donald-draper.iteye.com/blog/2360206[/url]AQS详解-CLH队列，线程等待状态：[url]http://donald-draper.iteye.com/blog/2360256[/url]AQS-Condition详解：[url]http://donald-draper.iteye.com/blog/2360381[/url]可重入锁ReentrantLock详解：[url]http://donald

辅助类LockSupport：[url]http://donald-draper.iteye.com/blog/2360206[/url]AQS详解-CLH队列，线程等待状态：[url]http://donald-draper.iteye.com/blog/2360256[/url]AQS-Condition详解：[url]http://donald-draper.iteye.com/blog/2360381[/url][code="java"]/* * ORACLE P

辅助类：LockSupport：[url]http://donald-draper.iteye.com/blog/2360206[/url]AQS详解-CLH队列，线程等待状态：[url]http://donald-draper.iteye.com/blog/2360256[/url][code="java"]/** * Condition implementation for a {@link * AbstractQueuedSynchronizer}

辅助类LockSupport：[url]http://donald-draper.iteye.com/blog/2360206[/url]AQS作为高性能锁的基础，想要理解锁机制，我们需要深入地去剖析AbstractQueuedSynchronizer。今天我们不打算，将独占锁和共享锁的获取与释放，条件等待和唤醒，我们从源码帮助文档，简单看一下AQS是个什么东西，后面的文章我们详细说独占锁和共享锁的获取与释放，条件等待和唤醒。[code="java"]/* * ORACLE

c domain, as explained at * http://creativecommons.org/publicdomain/zero/1.0/ */package java.util.concurrent.locks;import java.util.concurrent.*;import sun.misc.Unsafe;/** * Basic thread blocking primitives for creating locks and other

c domain, as explained at * http://creativecommons.org/publicdomain/zero/1.0/ */package java.util.concurrent.locks;/** * A synchronizer that may be exclusively owned by a thread. This * class provides a basis for creating locks and related

是从JAVA SE 1.4 引入的，为了避免和老版本的Java代码中使用了assert关键字导致错误，Java在执行的时候默认是不启动断言检查的（这个时候，所有的断言语句都将忽略！），如果要开启断言检查，则需要用开关-enableassertions或-ea来开启。assert关键字语法很简单，有两种用法： 1、assert 如果为true，则程序继续执行。如果为false，则程序抛出AssertionError，并终止执行。 2、assert : 如果为true，

www.infoq.com/cn/articles/ftf-java-volatile[/url]深入理解Java内存模型（四）——volatile：[url]http://www.infoq.com/cn/articles/java-memory-model-4/[/url]Java的多线程机制系列：(四)不得不提的volatile及指令重排序(happen-before)：[url]http://www.cnblogs.com/mengheng/p/3495379.html[/url]