Worker Thread模式

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多线程 Worker Thread 模式

Worker是“工人”的意思,worker thread pattern中,工人线程(worker thread)会一次抓一件工作来处理,当没有工作可做时,工人线程会停下来等待心得工作过来. Worker Thread也叫做background thread,另外,也有人把视点放在管理工人线程的地方,称之为Thread Pool. 最近闲时在看<Java多线程设计模式>,很不错,语言浅显易懂,而且编排也好,很有启发性,现在挑其中一章来写写心得 worker thread是我们平时用的很多的一种…

多线程系列之九：Worker Thread模式

一,Worker Thread模式也叫ThreadPool(线程池模式) 二,示例程序情景:一个工作车间有多个工人处理请求,客户可以向车间添加请求.请求类:Request定义了请求的信息和处理该请求的方法车间类:Channel定义了车间里的工人,存放请求的容器.接收请求的方法,处理完请求后取出请求的方法客户类:ClientThread创建请求,并把请求交给车间工人类:WorkerThread处理请求 public class Request { private final String na…

工人线程Worker thread会逐个取回工作并进行处理,当所有工作全部完成后,工人线程会等待新的工作到来 5个工人线程从传送带取数据,3个传送工人线程将数据放入传送带 public class Channel { ; private final Request[] requestQueue; private int head; private int tail; private int count; private final WorkerThread[] workerPool; publi…

Worker Thread

http://www.codeproject.com/Articles/552/Using-Worker-Threads Introduction Worker threads are an elegant solution to a number of problems about concurrent processing; for example, the need to keep the GUI active while a computation is being performed.…

Simple Worker Thread Class

http://www.codeproject.com/Articles/36184/Simple-Worker-Thread-Class Introduction Many times we need to create worker threads and generally we want to wait in the main thread till all worker threads finish their execution, something similar to pthrea…

多线程程序设计学习（9）worker pattern模式

Worker pattern[工作模式]一:Worker pattern的参与者--->Client(委托人线程)--->Channel(通道,里边有,存放请求的队列)--->Request(工作内容的包装)--->Worker(工人线程) 二:Worker pattern模式什么时候使用--->类似生产者消费者三:Worker pattern思考四进阶说明--->工作线程取出请求内容包装后,根据多态,不同的请求执行不同的业务方法 Request接口 package…

Exception thrown on Scheduler.Worker thread. Add `onError` handling

<html> <head></head> <body> java.lang.IllegalStateException: Exception thrown on Scheduler.Worker thread. Add `onError` handling. <br /> rx.android.schedulers.LooperScheduler$ScheduledAction.run(LooperScheduler.java:112) <…

Scheduler & Task & Worker & Thread & Request & Session & Connection of SQL Server

MSSQL一直以来被人们认为简单.好学,但等到大家掌握了入门操作,深入理解起来又觉得非常的“拧巴”,尤其是对用惯了Oracle的同学来说,究其根本原因,无非是MSSQL引入和暴露了太多的概念.细节和理论层,而Oracle恰恰屏蔽了这些,比如下面讲到的这些概念,即使是使用很久MSSQL的同学来说,也未必就真理解的正确,下面这段文字,很好的解释了MSSQL中的几个基本概念: Scheduler (SOS Scheduler)– the object that manages thread sched…

Do waiting or suspended tasks tie up a worker thread?

https://blogs.msdn.microsoft.com/askjay/2012/07/29/do-waiting-or-suspended-tasks-tie-up-a-worker-thread/ jamesaskJuly 29, 20120 I had a discussion the other day with someone about worker threads and their relation to tasks. I thought a quick demo…

Mongodb之failed to create service entry worker thread

Mongodb "failed to create service entry worker thread" 错误. 系统:CentOS release 6.8 mongod.log中包含内容: "[thread1] failed to create service entry worker thread for " 暂时解决方法: ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d)…