Java Fiber类代码示例

import co.paralleluniverse.fibers.Fiber; //导入依赖的package包/类
@Suspendable
public Future<T> submit(Callable<T> callable) {
    return new Fiber<T>() {
        @Override
        protected T run() throws SuspendExecution, InterruptedException {
            try {
                return callable.call();
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                channel.send(this);
            }
            return null;
        }
    }.start();
}
 

import co.paralleluniverse.fibers.Fiber; //导入依赖的package包/类
/**
 * In current state - no where near as good performance as vertx, but syntax is better
 */
public static void main(String[] args) throws Exception {
    int count = 9999;
    CountDownLatch done = new CountDownLatch(count);

    Stopwatch stopwatch = Stopwatch.createStarted();
    IntStream.range(0,count).forEach(i ->
        new Fiber((SuspendableRunnable) () -> {
            try (CloseableHttpResponse response = client.execute(new HttpGet(url))){
                response.getStatusLine().getStatusCode();
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                done.countDown();
            }
        }).start()
    );
    done.await(15, TimeUnit.SECONDS);
    TaskRunner.print(
            new TaskRunner.Result(stopwatch.elapsed(TimeUnit.MILLISECONDS), Runtime.getRuntime().totalMemory()),
            done.getCount(),
            FiberHttpRequest.class.getSimpleName());

}
 

import co.paralleluniverse.fibers.Fiber; //导入依赖的package包/类
/**
 * Record events in a separate Fiber using one or more Recorders.
 *
 * This method returns immediately after starting the Fiber for recording events.
 *
 * @param fiberName the name of the fiber that records events.
 * @param fe an optional scheduler for the spawned recording fiber, null to use the default.
 * @param rp a channel on which to receive TimingEvents, which are passed to the underlying
 *           Recorders.
 * @param rs zero or more Recorders, each of which receives every event (after the delay period)
 *           in the order they are passed to this method.
 * @param <T> the type of the Response object in each TimingEvent.
 */
@SafeVarargs
static <T> Fiber<Void> record(final String fiberName,
                              final FiberScheduler fe,
                              final ReceivePort<TimingEvent<T>> rp,
                              final Recorder<T>... rs)
{
  return new Fiber<Void>(fiberName, fe != null ? fe : DefaultFiberScheduler.getInstance(), () -> {
    while (true) {
      final TimingEvent<T> event = rp.receive();

      if (event == null) {
        break;
      }

      for (final Recorder<T> r : rs) {
        r.record(event);
      }
    }
    return null;
  }).start();
}
 

import co.paralleluniverse.fibers.Fiber; //导入依赖的package包/类
public static void main(String[] args) throws SuspendExecution, InterruptedException {
  final IntervalGenerator intervalGen = new ConstantIntervalGenerator(10000000);
  final RequestExecutor<EchoRequest, EchoResponse> requestExector = new EchoRequestExecutor();

  final Channel<EchoRequest> requestCh = Channels.newChannel(-1);
  final Channel<TimingEvent<EchoResponse>> eventCh = Channels.newChannel(-1);

  // Requests generator
  new Fiber<Void>("req-gen", () -> {
    for (int i=0; i < 1000; ++i) {
      final EchoRequest req = new EchoRequest();
      req.setMessage("foo");
      requestCh.send(req);
    }

    requestCh.close();
  }).start();

  final Histogram histogram = new Histogram(3600000000L, 3);
  // Event recording, both HistHDR and logging
  record(eventCh, new HdrHistogramRecorder(histogram, 1000000), new LoggingRecorder(LOG));

  JBender.loadTestThroughput(intervalGen, 0, requestCh, requestExector, eventCh);

  histogram.outputPercentileDistribution(System.out, 1000.0);
}
 

import co.paralleluniverse.fibers.Fiber; //导入依赖的package包/类
/**
 * 产生一个纤程actor，并且使用指定的Handler来放入指定的调度器执行
 * @param fibSche 调度器
 * @param ah 可运行单元
 * @return 新Actor的Id
 */
@Suspendable
public ActorId spawn(FiberScheduler fibSche, final IFiberActorHandler ah){
	if (fibSche == null){
		throw new NullPointerException();
	}
	
	final Actor actor = makeActor(fibSche);
	ActorId aid = actor.getActorId();
	new Fiber<Void>(fibSche) {
		private static final long serialVersionUID = 2841359941298581576L;
		@Override
		protected Void run() throws SuspendExecution, InterruptedException {
			Actor.runOnFiber(actor, ah);
			return null;
		}
	}.start();
	return aid;
}
 

import co.paralleluniverse.fibers.Fiber; //导入依赖的package包/类
public void reset() {
	int cnt = 0;
	log("Waiting on [" + fibers.size() + "] Fibers....");
	for(Fiber<?> f: fibers.values()) {
		try { 
			while(f.getState()==Strand.State.RUNNING) {
				SystemClock.sleep(100);
			}
			log("Testing State: %s : %s", f.getName(), f.getState());
			
			cnt++;
		} catch (Exception ex) { 
			ex.printStackTrace(System.err);
		//throw new RuntimeException(ex); 
		}
	}
	fiberTask.set(0);
	log("Reset Complete. Tasks:" + cnt);
	invBuilder.build().send();
	log("BulkRequest Dispatched");
}
 

import co.paralleluniverse.fibers.Fiber; //导入依赖的package包/类
@Test
public void testQuasar() throws ExecutionException, InterruptedException {

    AsyncApi async = new AsyncApiImpl();
    SyncApi sync = new SyncApiImpl(async);

    new Fiber<Void>(() -> {
        int a = new Random().nextInt(1000);
        System.out.println("a is " + a);
        int b = new Random().nextInt(1000);
        System.out.println("b is " + b);
        System.out.println(a + " + " + b + " = " + sync.sum(a, b));

    }).start().join();

}
 

import co.paralleluniverse.fibers.Fiber; //导入依赖的package包/类
@Test
public void testDefaultSleep() throws Exception {
	final Script script = createScript("sleep(1000);", new HashMap<String, Object>());
	final AtomicInteger counter = new AtomicInteger(0);
	Fiber fiber = new Fiber(scheduler, new SuspendableRunnable() {
		@Override
		public void run() throws SuspendExecution, InterruptedException {
			counter.incrementAndGet();
			script.run();
			counter.incrementAndGet();
		}
	});
	fiber.start();
	fiber.join();
	Assert.assertEquals(counter.intValue(), 2);
}
 

import co.paralleluniverse.fibers.Fiber; //导入依赖的package包/类
@Test
public void testClosuresSleep() throws Exception {
	final SleepMethodSupport sleepMethodSupport = new SleepMethodSupport();
	HashMap<String, Object> args = new HashMap<String, Object>() {
		{
			put("sleepMethodSupport", sleepMethodSupport);
			put("_sleep", new MethodClosure(sleepMethodSupport, "_sleep"));
		}
	};
	final Script script = createScript("sleep(1000);_sleep(1000);sleepMethodSupport._sleep(1000)", args);
	final AtomicInteger counter = new AtomicInteger(0);
	Fiber fiber = new Fiber(scheduler, new SuspendableRunnable() {
		@Override
		public void run() throws SuspendExecution, InterruptedException {
			counter.incrementAndGet();
			script.run();
			counter.incrementAndGet();
		}
	});
	fiber.start();
	fiber.join();
	Assert.assertEquals(counter.intValue(), 2);
}
 

import co.paralleluniverse.fibers.Fiber; //导入依赖的package包/类
private static void testInFiber() throws ExecutionException, InterruptedException {
        final HystrixFiber hystrixFiber = new HystrixFiber();
//        System.out.println(hystrixFiber.execute());
        Fiber fiber = new Fiber<String>() {
            @Override
            @Suspendable
            protected String run() throws SuspendExecution, InterruptedException {
                System.out.println(Thread.currentThread().getName());
                return hystrixFiber.execute();
            }
        }.start();
        System.out.println(fiber.get());
    }
 

import co.paralleluniverse.fibers.Fiber; //导入依赖的package包/类
@Override
@Suspendable
public void execute(Runnable command) {
    new Fiber<Void>() {
        @Override
        protected Void run() throws SuspendExecution, InterruptedException {
            command.run();
            return null;
        }
    }.start();
}
 

import co.paralleluniverse.fibers.Fiber; //导入依赖的package包/类
private static Fiber getFiber(final long sleep, final String message) {
    return new Fiber<String>() {
        @Override
        protected String run() throws SuspendExecution, InterruptedException {
            Strand.sleep(sleep);
            return message;
        }
    };
}
 

import co.paralleluniverse.fibers.Fiber; //导入依赖的package包/类
private static void startFiber(FiberCompletionService completionService, String message, long sleep) {
    new Fiber<Void>() {
        @Override
        protected Void run() throws SuspendExecution, InterruptedException {
            completionService.submit(new FiberCallable(message, sleep));
            return null;
        }
    }.start();
}
 

import co.paralleluniverse.fibers.Fiber; //导入依赖的package包/类
@Suspendable
public static Long fiberSleep() {
    try {
        Fiber.sleep(1000);
        return 1000l;
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}
 

import co.paralleluniverse.fibers.Fiber; //导入依赖的package包/类
/**
 * Simple syntax, but no performance gain
 */
public static void main(String[] args) throws Exception {
    TaskRunner taskRunner = new TaskRunner(1000);

    taskRunner.runTask(() -> new Fiber((SuspendableRunnable) () -> {
        Big.task();
        taskRunner.countDown();
    }).start());
}