[英]ScheduleAtFixedRate executes once (or as many times as corePoolSize equals)
我已经创建了MyThreadPoolExecutor
public class MyThreadPoolExecutor extends ScheduledThreadPoolExecutor {
private final Context ctx;
public MyThreadPoolExecutor(int corePoolSize, Context ctx, String threadNamePrefix)
{
super(corePoolSize);
MyThreadFactory factory = new MyThreadFactory(new ThreadExceptionHandler(ctx), threadNamePrefix);
setThreadFactory(factory);
this.ctx = ctx;
}
@Override
public void afterExecute(Runnable r, Throwable t) {
super.afterExecute(r, t);
LogUtils.i(Tags.THREAD_EXECUTED, Thread.currentThread().getName());
if (t == null && r instanceof Future<?>) {
try {
Object result = ((Future<?>) r).get();
} catch (CancellationException e) {
t = e;
} catch (ExecutionException e) {
t = e.getCause();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
}
if (t != null) {
LogUtils.e(Tags.UNCAUGHT_EXCEPTION, "Uncaught exception error");
Utils.handleUncaughtException(ctx, t);
}
}
}
我有MyThreadFactory
public class MyThreadFactory implements ThreadFactory {
private static final ThreadFactory defaultFactory = Executors.defaultThreadFactory();
private final Thread.UncaughtExceptionHandler handler;
private final String threadName;
public MyThreadFactory(Thread.UncaughtExceptionHandler handler, @NonNull String threadName) {
this.handler = handler;
this.threadName = threadName;
}
@Override
public Thread newThread(@NonNull Runnable runnable) {
Thread thread = defaultFactory.newThread(runnable);
thread.setUncaughtExceptionHandler(handler);
if (threadName != null) {
thread.setName(threadName +"-" + thread.getId());
}
LogUtils.i(Tags.THREAD_CREATED, thread.getName());
return thread;
}
}
我需要每1秒执行一次线程来做一些事情。 当我使用自己的MyScheduledThreadPoolExecutor时,它的运行次数只有corePoolSize的相等。 因此,当corePoolSize等于3时,我的线程运行3次。
当我使用ScheduledThreadPoolExecutor时,上述问题不存在。
下面,我运行它:
commander = new MyThreadPoolExecutor(corePoolSize, getApplicationContext(), threadNamePrefix);
commander.scheduleAtFixedRate(new Runnable() {
@Override
public void run() {
LogUtils.i(Tags.DISPLAY_ACTIVITY, "Check display " + Thread.currentThread().getName());
}
}, 1000, PERIOD_CHECK_TIME_FRAME, TimeUnit.MILLISECONDS);
我想念什么? 我究竟做错了什么?
如果在运行可运行程序时发生运行时异常而没有引发异常,则ScheduledExecutorService
阻止后续调用(真的很难过)。
这可能是您的问题。 可能是代码抛出异常的地方,因此不再发生任何调用。 尝试将可运行对象包装在try catch中,以查看是否抛出任何异常。
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