假设我有一个利用Executor框架的应用程序
Executors.newSingleThreadExecutor().submit(new Runnable(){
@Override
public void run(){
// do stuff
}
}
当我在调试器中运行此应用程序时，将创建一个具有以下(默认)名称的线程:thread [pool-1-thread-1]。正如您所看到的，这并不是非常有用，而且据我所知，Executor框架并没有提供一种简单的方法来命名创建的线程或线程池。
那么，如何为线程/线程池提供名称呢?例如，Thread[fopool - foothread]。
当前回答
使用Executors.defaultThreadFactory()的现有功能，但只设置名称:
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadFactory;
public class NamingThreadFactory implements ThreadFactory {
private final String prefix;
private final AtomicInteger threadNumber = new AtomicInteger(0);
public NamingThreadFactory(String prefix){
this.prefix = prefix;
}
@Override
public Thread newThread(Runnable r) {
Thread t = Executors.defaultThreadFactory().newThread(r);
t.setName(prefix + threadNumber.addAndGet(1));
return t;
}
}
其他回答
番石榴几乎总有你需要的东西。
ThreadFactory namedThreadFactory =
new ThreadFactoryBuilder().setNameFormat("my-sad-thread-%d").build()
并将它传递给您的ExecutorService。
您可以尝试提供自己的线程工厂，它将创建具有适当名称的线程。这里有一个例子:
class YourThreadFactory implements ThreadFactory {
public Thread newThread(Runnable r) {
return new Thread(r, "Your name");
}
}
Executors.newSingleThreadExecutor(new YourThreadFactory()).submit(someRunnable);
或者用Kotlin
Executors.newSingleThreadExecutor { r -> Thread(r, "Your name") }
我用来装饰现有工厂的自制核心Java解决方案:
public class ThreadFactoryNameDecorator implements ThreadFactory {
private final ThreadFactory defaultThreadFactory;
private final String suffix;
public ThreadFactoryNameDecorator(String suffix) {
this(Executors.defaultThreadFactory(), suffix);
}
public ThreadFactoryNameDecorator(ThreadFactory threadFactory, String suffix) {
this.defaultThreadFactory = threadFactory;
this.suffix = suffix;
}
@Override
public Thread newThread(Runnable task) {
Thread thread = defaultThreadFactory.newThread(task);
thread.setName(thread.getName() + "-" + suffix);
return thread;
}
}
在行动:
Executors.newSingleThreadExecutor(new ThreadFactoryNameDecorator("foo"));
如果使用Spring，可以为CustomizableThreadFactory设置线程名前缀。
例子:
ExecutorService alphaExecutor =
Executors.newFixedThreadPool(10, new CustomizableThreadFactory("alpha-"));
或者，您可以使用ThreadPoolExecutorFactoryBean将ExecutorService创建为Spring bean——然后所有线程都将以beanName-前缀命名。
@Bean
public ThreadPoolExecutorFactoryBean myExecutor() {
ThreadPoolExecutorFactoryBean executorFactoryBean = new ThreadPoolExecutorFactoryBean();
// configuration of your choice
return executorFactoryBean;
}
在上面的例子中，线程将以myExecutor-前缀命名。您可以显式地将前缀设置为不同的值(例如。通过在工厂bean上设置executorFactoryBean.setThreadNamePrefix("myPool-")来实现。
你可以提供一个ThreadFactory给newSingleThreadScheduledExecutor(ThreadFactory)。工厂将负责创建线程，并能够为它们命名。
引用Javadoc的话:
Creating new threads New threads are created using a ThreadFactory. If not otherwise specified, a Executors.defaultThreadFactory() is used, that creates threads to all be in the same ThreadGroup and with the same NORM_PRIORITY priority and non-daemon status. By supplying a different ThreadFactory, you can alter the thread's name, thread group, priority, daemon status, etc. If a ThreadFactory fails to create a thread when asked by returning null from newThread, the executor will continue, but might not be able to execute any tasks
