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| package com.example.login;
import com.google.common.util.concurrent.*;
import java.util.Random;
import java.util.concurrent.Callable;
import java.util.concurrent.Executors;
public class TestListenableFuture2 {
final static ListeningExecutorService service = MoreExecutors.listeningDecorator(Executors.newCachedThreadPool());
public static void main(String[] args) throws Exception {
Long t1 = System.currentTimeMillis();
ListenableFuture<Boolean> booleanTask = service.submit(new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return true;
}
});
Futures.addCallback(booleanTask, new FutureCallback<Boolean>() {
@Override
public void onSuccess(Boolean result) {
System.err.println("BooleanTask: " + result);
}
@Override
public void onFailure(Throwable t) {
}
});
ListenableFuture<String> stringTask = service.submit(new Callable<String>() {
@Override
public String call() throws Exception {
return "Hello World";
}
});
Futures.addCallback(stringTask, new FutureCallback<String>() {
@Override
public void onSuccess(String result) {
System.err.println("StringTask: " + result);
}
@Override
public void onFailure(Throwable t) {
}
});
ListenableFuture<Integer> integerTask = service.submit(new Callable<Integer>() {
@Override
public Integer call() throws Exception {
return new Random().nextInt(100);
}
});
Futures.addCallback(integerTask, new FutureCallback<Integer>() {
@Override
public void onSuccess(Integer result) {
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.err.println("IntegerTask: " + result);
}
@Override
public void onFailure(Throwable t) {
}
});
System.err.println("time: " + (System.currentTimeMillis() - t1));
service.shutdown();
}
}
|