com.vip.vjtools.vjkit.concurrent.threadpool

Class ThreadPoolBuilder.CachedThreadPoolBuilder

java.lang.Object

com.vip.vjtools.vjkit.concurrent.threadpool.ThreadPoolBuilder.CachedThreadPoolBuilder

Enclosing class:

ThreadPoolBuilder

public static class ThreadPoolBuilder.CachedThreadPoolBuilder
extends Object

创建CachedThreadPool, maxSize建议设置 1. 任务提交时, 如果线程数还没达到minSize即创建新线程并绑定任务(即minSize次提交后线程总数必达到minSize, 不会重用之前的线程) minSize默认为0, 可设置保证有基本的线程处理请求不被回收. 2. 第minSize次任务提交后, 新增任务提交进SynchronousQueue后，如果没有空闲线程立刻处理，则会创建新的线程, 直到总线程数达到上限. maxSize默认为Integer.Max, 可以进行设置. 如果设置了maxSize, 当总线程数达到上限, 会调用RejectHandler进行处理, 默认为AbortPolicy, 抛出RejectedExecutionException异常. 其他可选的Policy包括静默放弃当前任务(Discard)，或由主线程来直接执行(CallerRuns). 3. minSize以上, maxSize以下的线程, 如果在keepAliveTime中都poll不到任务执行将会被结束掉, keeAliveTimeJDK默认为10秒. JDK默认值60秒太高，如高达1000线程时，要低于16QPS时才会开始回收线程, 因此改为默认10秒.

Constructor Summary

Constructors

Constructor and Description
ThreadPoolBuilder.CachedThreadPoolBuilder()

Method Summary

Methods

Modifier and Type	Method and Description
ThreadPoolExecutor	build()
ThreadPoolBuilder.CachedThreadPoolBuilder	setDaemon(Boolean daemon) 与threadFactory互斥, 优先使用ThreadFactory 默认为NULL，不进行设置，使用JDK的默认值.
ThreadPoolBuilder.CachedThreadPoolBuilder	setKeepAliveSecs(int keepAliveSecs) JDK默认值60秒太高，如高达1000线程时，要低于16QPS时才会开始回收线程, 因此改为默认10秒.
ThreadPoolBuilder.CachedThreadPoolBuilder	setMaxSize(int maxSize) Max默认Integer.MAX_VALUE的，建议设置
ThreadPoolBuilder.CachedThreadPoolBuilder	setMinSize(int minSize)
ThreadPoolBuilder.CachedThreadPoolBuilder	setRejectHanlder(RejectedExecutionHandler rejectHandler)
ThreadPoolBuilder.CachedThreadPoolBuilder	setThreadFactory(ThreadFactory threadFactory) 与threadNamePrefix互斥, 优先使用ThreadFactory
ThreadPoolBuilder.CachedThreadPoolBuilder	setThreadNamePrefix(String threadNamePrefix) 与threadFactory互斥, 优先使用ThreadFactory

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ThreadPoolBuilder.CachedThreadPoolBuilder

public ThreadPoolBuilder.CachedThreadPoolBuilder()

Method Detail

setMinSize

public ThreadPoolBuilder.CachedThreadPoolBuilder setMinSize(int minSize)

setMaxSize

public ThreadPoolBuilder.CachedThreadPoolBuilder setMaxSize(int maxSize)

Max默认Integer.MAX_VALUE的，建议设置

setKeepAliveSecs

public ThreadPoolBuilder.CachedThreadPoolBuilder setKeepAliveSecs(int keepAliveSecs)

JDK默认值60秒太高，如高达1000线程时，要低于16QPS时才会开始回收线程, 因此改为默认10秒.

setThreadFactory

public ThreadPoolBuilder.CachedThreadPoolBuilder setThreadFactory(ThreadFactory threadFactory)

与threadNamePrefix互斥, 优先使用ThreadFactory

setThreadNamePrefix

public ThreadPoolBuilder.CachedThreadPoolBuilder setThreadNamePrefix(String threadNamePrefix)

与threadFactory互斥, 优先使用ThreadFactory

setDaemon

public ThreadPoolBuilder.CachedThreadPoolBuilder setDaemon(Boolean daemon)

与threadFactory互斥, 优先使用ThreadFactory 默认为NULL，不进行设置，使用JDK的默认值.

setRejectHanlder

public ThreadPoolBuilder.CachedThreadPoolBuilder setRejectHanlder(RejectedExecutionHandler rejectHandler)

build

public ThreadPoolExecutor build()