构建高性能工作线程 二 扩展 Spring 线程池
扩展SPRING 2.0的threadPooltaskExecutor
public class MyThreadPoolTaskExecutor implements SchedulingTaskExecutor,Executor, InitializingBean, DisposableBean { public void afterPropertiesSet() { initialize(); } public void initialize() { BlockingQueue queue = createQueue(queueCapacity); executorService = new ThreadPoolExecutor(corePoolSize, maxPoolSize,keepAliveSeconds, TimeUnit.SECONDS, queue, threadFactory,rejectedExecutionHandler); threadPoolMap.put(this.getThreadPoolName(), this); } public boolean prefersShortLivedTasks() { return true; } public void destroy() { shutdown(); } public void shutdown() { executorService.shutdown(); } public String getThreadPoolName() { return threadPoolName; } public void setThreadPoolName(String threadPoolName) { this.threadPoolName = threadPoolName; } public int getQueueCapacity() { return queueCapacity; } public static Map getThreadPoolMap(){ return threadPoolMap; }}?
<!-- 线程池进行初始化 --><bean id="beenCoverTaskExecutor" value="5" /> <!-- 最大线程数，默认为Integer.MAX_VALUE --> <property name="maxPoolSize" value="10" /> <!-- 队列最大长度，一般需要设置值>=notifyScheduledMainExecutor.maxNum；默认为Integer.MAX_VALUE --> <property name="queueCapacity" value="50000" /> <!-- 线程池维护线程所允许的空闲时间，默认为60s --> <property name="keepAliveSeconds" value="300" /> <!-- 线程池名称 --> <property name="threadPoolName" value="beenCoverTaskExecutor" /> <!-- 线程池对拒绝任务（无线程可用）的处理策略，目前只支持AbortPolicy、CallerRunsPolicy；默认为后者 --> <property name="rejectedExecutionHandler"> <!-- AbortPolicy:直接抛出java.util.concurrent.RejectedExecutionException异常 --> <!-- CallerRunsPolicy:主线程直接执行该任务，执行完之后尝试添加下一个任务到线程池中，可以有效降低向线程池内添加任务的速度 --> <!-- DiscardOldestPolicy:抛弃旧的任务、暂不支持；会导致被丢弃的任务无法再次被执行 --> <!-- DiscardPolicy:抛弃当前任务、暂不支持；会导致被丢弃的任务无法再次被执行 --> <bean /> </property></bean>
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