广州网站建设联系电话,电脑做网站软件,适合大学生做的网站,网站建设用的工具一、jdk的阻塞队列#xff1a; 二、Spring boot工程的有哪些阻塞队列呢#xff1f;
1、默认注入的ThreadPoolTaskExecutor
视频解说#xff1a;
线程池篇-springboot项目中的service层里简单注入ThreadPoolTaskExecutor并且使用_哔哩哔哩_bilibili
程序代码#xff1a;…一、jdk的阻塞队列 二、Spring boot工程的有哪些阻塞队列呢
1、默认注入的ThreadPoolTaskExecutor
视频解说
线程池篇-springboot项目中的service层里简单注入ThreadPoolTaskExecutor并且使用_哔哩哔哩_bilibili
程序代码ThreadPoolDemo/ThreadPool00 · xin麒/XinQiUtilsOrDemo - 码云 - 开源中国 (gitee.com)
简单在service层注入的话是这样的
Autowired
ThreadPoolTaskExecutor threadPoolTaskExecutor;同时在这里使用这个线程池
Override
public Object springbootThreadPool(Long count) {try {threadPoolTaskExecutor.execute(() - {try {Thread.sleep(1000 * 1);log.debug(v me 50);} catch (InterruptedException e) {e.printStackTrace();}});} catch (Exception e) {e.printStackTrace();}return nice;
}以debug方式启动项目来查看一下发现这里默认使用的阻塞队列是 2、自定义ThreadPoolTaskExecutor
视频解说
【2】https://www.bilibili.com/video/BV1Qu4y1X7zk
【3】https://www.bilibili.com/video/BV1Cu4y1i7Ae
程序代码
https://gitee.com/flowers-bloom-is-the-sea/XinQiUtilsOrDemo/tree/master/ThreadPoolDemo/ThreadPool0
验证方式1-通过启动springboot工程通过debug形式查看
Bean(xinTaskExecutor)
public Executor xinTaskExecutor() {ThreadPoolTaskExecutor taskExecutor new ThreadPoolTaskExecutor();//设置线程池参数信息taskExecutor.setCorePoolSize(10);taskExecutor.setMaxPoolSize(50);taskExecutor.setQueueCapacity(0);taskExecutor.setKeepAliveSeconds(60);taskExecutor.setThreadNamePrefix(xinTaskExecutor--);taskExecutor.setWaitForTasksToCompleteOnShutdown(true);taskExecutor.setAwaitTerminationSeconds(60);//修改拒绝策略为使用当前线程执行taskExecutor.setRejectedExecutionHandler(new ThreadPoolExecutor.AbortPolicy());//初始化线程池taskExecutor.initialize();return taskExecutor;
}验证方式2-main方法创建并初始化
通过debug形式查看
①查看initialize方法就可以了
public static void main(String[] args) {ThreadPoolTaskExecutor taskExecutor new ThreadPoolTaskExecutor();//设置线程池参数信息taskExecutor.setCorePoolSize(10);taskExecutor.setMaxPoolSize(50);taskExecutor.setQueueCapacity(0);taskExecutor.setKeepAliveSeconds(60);taskExecutor.setThreadNamePrefix(myExecutor--);taskExecutor.setWaitForTasksToCompleteOnShutdown(true);taskExecutor.setAwaitTerminationSeconds(10);//修改拒绝策略为使用当前线程执行taskExecutor.setRejectedExecutionHandler(new ThreadPoolExecutor.AbortPolicy());//初始化线程池taskExecutor.initialize();
}②可以看到ExecutorConfigurationSupport类里面有这个方法
public void initialize() {if (logger.isInfoEnabled()) {logger.info(Initializing ExecutorService (this.beanName ! null ? this.beanName : ));}if (!this.threadNamePrefixSet this.beanName ! null) {setThreadNamePrefix(this.beanName -);}this.executor initializeExecutor(this.threadFactory, this.rejectedExecutionHandler);
}直接看this.executor initializeExecutor(this.threadFactory, this.rejectedExecutionHandler)
③来到org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor
Override
protected ExecutorService initializeExecutor(ThreadFactory threadFactory, RejectedExecutionHandler rejectedExecutionHandler) {BlockingQueueRunnable queue createQueue(this.queueCapacity);ThreadPoolExecutor executor;if (this.taskDecorator ! null) {executor new ThreadPoolExecutor(this.corePoolSize, this.maxPoolSize, this.keepAliveSeconds, TimeUnit.SECONDS,queue, threadFactory, rejectedExecutionHandler) {Overridepublic void execute(Runnable command) {Runnable decorated taskDecorator.decorate(command);if (decorated ! command) {decoratedTaskMap.put(decorated, command);}super.execute(decorated);}};}else {executor new ThreadPoolExecutor(this.corePoolSize, this.maxPoolSize, this.keepAliveSeconds, TimeUnit.SECONDS,queue, threadFactory, rejectedExecutionHandler);}if (this.allowCoreThreadTimeOut) {executor.allowCoreThreadTimeOut(true);}this.threadPoolExecutor executor;return executor;
}直接看createQueue(this.queueCapacity)即可
④org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor#createQueue
可以看到要么new LinkedBlockingQueue(queueCapacity)要么就new SynchronousQueue()
protected BlockingQueueRunnable createQueue(int queueCapacity) {if (queueCapacity 0) {return new LinkedBlockingQueue(queueCapacity);}else {return new SynchronousQueue();}
}那么有没有其他阻塞队列可选呢这个我就没详细去看了可以自己尝试下找一下有没有其他方式可以的难道说重写在里面的方法吗可行性有待验证。如果创建一个继承了org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor类且重写了createQueue方法的话那么可以考虑下。就这样吧。
三、和jdk的线程池的区别
1、感觉没什么区别因为ThreadPoolTaskExecutor内使用的线程池本来就是成员变量中的
Nullable
private ThreadPoolExecutor threadPoolExecutor;2、springboot的项目里可以通过注解方式来执行方法
只不过指定使用哪个线程池来执行要异步执行方法的内容。
https://www.bilibili.com/video/BV1A14y1B78x/
如果是默认的注解来执行内容则可能有其他问题
https://www.bilibili.com/video/BV1Gu4y1q7TY
但是可以通过注解指定使用哪个线程池
https://www.bilibili.com/video/BV1e44y1c7uE
