FutureTask在调用耗时操作超时场景下的应用
在调用三方API时,对某些特殊的接口要求响应时间比较高,如果响应超时后可继续执行其它逻辑的处理方法。
public class LimitedTimeExecutor {
private static final ExecutorService THREAD_POOL = Executors.newFixedThreadPool(1);
class Task implements Callable<String>{
@Override
public String call() throws Exception {
//调用外部接口或处理耗时的操作
TimeUnit.SECONDS.sleep(4);
return "Hello World";
}
}
public void exec(){
FutureTask<String> futureTask = new FutureTask<>(new Task());
THREAD_POOL.execute(futureTask);
try {
String result = futureTask.get(3, TimeUnit.SECONDS);
System.out.println(result);
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
} catch (TimeoutException e) {
System.out.println("Invoke timeout");
}
//继续处理其它逻辑
System.out.println("Go on");
}
public static void main(String[] args) {
LimitedTimeExecutor demo = new LimitedTimeExecutor();
demo.exec();
THREAD_POOL.shutdown();
}
}