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check‐then‐act: you observe something to be true and then take action based on that observation (create X); but in fact the observation could have become invalid between the time you observed it and the time you acted on it (someone else created X in the meantime), causing a problem ...
实现了这些接口的有ArrayBlockingQueue, DelayQueue, LinkedBlockingDeque, LinkedBlockingQueue, PriorityBlockingQueue, SynchronousQueue。分别对应于之前几乎所有的容器类。 BlockingDeQueue使用了更先进的“Working-Stell”模型,当一个线程没有工作可以做的时候,会从其他线程的工作队列“偷取”任务,以保证每个线程都是忙碌的...
A CompletionService canforexample be used to manage asynchronous I/O, in which tasks that perform reads are submitted in one part of a program or system, and then acted upon in a different part of the program when the reads complete, possibly in a different order than they were requested. ...
In Java Concurrency in Practice, the creators of these new facilities explain not only how they work and how to use them, but also the motivation and design patterns behind them.However, developing, testing, and debugging multithreaded programs can still be very difficult; it is all too easy ...
注:Java 线程不安全就是指一个变量或方法同时满足“可变”、“共享”两个属性,并且没有采取正确的同步策略;线程安全就是只要打破其中一个,或者采取正确的同步策略。 面向对象中的抽象和封装会降低程序的性能,但在编写程序时,一种正确的编程方式是:首先使代码正确运行,然后再提高代码的性能。 最好是当性能测试结果...
Java Concurrencyin Practice 并发编程实践系列 第二章 线程安全 Thread Safety 下 Chapter 2: Thread Safety 第二章,主要讲的是线程安全的问题,及解决方法,现在写的是如何去理解线程安全,下一篇写2.1 What is thread safety Whenever more than one thread accesses a given state variable, and one of them migh...
Java Concurrency in Practice 作者:Brian Goetz/Tim Peierls/Joshua Bloch/Joseph Bowbeer/David Holmes/Doug Lea 出版社:Addison-Wesley Professional 出版年:2006-5-19 页数:384 定价:USD 59.99 装帧:Paperback ISBN:9780321349606 豆瓣评分 9.4 365人评价
JavaConcurrencyInPractice-取消与关闭 1、摘要 让线程和任务启动很容易,但是,要安全地关闭它们,就不是那么容易了。 Java中没有提供任何机制来安全地终止线程。 中断(Interruption)只是一种协作机制,然一个线程告诉另一个线程:我想让你停下来。 但是,另一个线程是否会停下来取决于它执行的任务里面是否响应了中断,...
Writing code that effectively exploits multiple processors can be very challenging。Java Concurrency in Practiceprovides you with the concepts and techniques needed to write safe and scalable Java programs for today's--and tomorrow's--systems。" ...