| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.storm.utils; |
| |
| import java.util.concurrent.atomic.AtomicLong; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * This class implements time simulation support. When time simulation is enabled, methods on this class will use fixed time. |
| * When time simulation is disabled, methods will pass through to relevant java.lang.System/java.lang.Thread calls. |
| * Methods using units higher than nanoseconds will pass through to System.currentTimeMillis(). Methods supporting nanoseconds will pass through to System.nanoTime(). |
| */ |
| public class Time { |
| public static final Logger LOG = LoggerFactory.getLogger(Time.class); |
| |
| private static AtomicBoolean simulating = new AtomicBoolean(false); |
| private static AtomicLong autoAdvanceNanosOnSleep = new AtomicLong(0); |
| //TODO: should probably use weak references here or something |
| private static volatile Map<Thread, AtomicLong> threadSleepTimesNanos; |
| private static final Object sleepTimesLock = new Object(); |
| private static AtomicLong simulatedCurrTimeNanos; |
| |
| public static class SimulatedTime implements AutoCloseable { |
| |
| public SimulatedTime() { |
| this(null); |
| } |
| |
| public SimulatedTime(Number advanceTimeMs) { |
| synchronized(Time.sleepTimesLock) { |
| Time.simulating.set(true); |
| Time.simulatedCurrTimeNanos = new AtomicLong(0); |
| Time.threadSleepTimesNanos = new ConcurrentHashMap<>(); |
| if (advanceTimeMs != null) { |
| Time.autoAdvanceNanosOnSleep.set(millisToNanos(advanceTimeMs.longValue())); |
| } |
| LOG.warn("AutoCloseable Simulated Time Starting..."); |
| } |
| } |
| |
| @Override |
| public void close() { |
| synchronized(Time.sleepTimesLock) { |
| Time.simulating.set(false); |
| Time.autoAdvanceNanosOnSleep.set(0); |
| Time.threadSleepTimesNanos = null; |
| LOG.warn("AutoCloseable Simulated Time Ending..."); |
| } |
| } |
| } |
| |
| @Deprecated |
| public static void startSimulating() { |
| synchronized(Time.sleepTimesLock) { |
| Time.simulating.set(true); |
| Time.simulatedCurrTimeNanos = new AtomicLong(0); |
| Time.threadSleepTimesNanos = new ConcurrentHashMap<>(); |
| LOG.warn("Simulated Time Starting..."); |
| } |
| } |
| |
| @Deprecated |
| public static void stopSimulating() { |
| synchronized(Time.sleepTimesLock) { |
| Time.simulating.set(false); |
| Time.autoAdvanceNanosOnSleep.set(0); |
| Time.threadSleepTimesNanos = null; |
| LOG.warn("Simulated Time Ending..."); |
| } |
| } |
| |
| public static boolean isSimulating() { |
| return simulating.get(); |
| } |
| |
| public static void sleepUntil(long targetTimeMs) throws InterruptedException { |
| if(simulating.get()) { |
| simulatedSleepUntilNanos(millisToNanos(targetTimeMs)); |
| } else { |
| long sleepTimeMs = targetTimeMs - currentTimeMillis(); |
| if(sleepTimeMs>0) { |
| Thread.sleep(sleepTimeMs); |
| } |
| } |
| } |
| |
| public static void sleepUntilNanos(long targetTimeNanos) throws InterruptedException { |
| if(simulating.get()) { |
| simulatedSleepUntilNanos(targetTimeNanos); |
| } else { |
| long sleepTimeNanos = targetTimeNanos-nanoTime(); |
| long sleepTimeMs = nanosToMillis(sleepTimeNanos); |
| int sleepTimeNanosSansMs = (int)(sleepTimeNanos%1_000_000); |
| if(sleepTimeNanos>0) { |
| Thread.sleep(sleepTimeMs, sleepTimeNanosSansMs); |
| } |
| } |
| } |
| |
| private static void simulatedSleepUntilNanos(long targetTimeNanos) throws InterruptedException { |
| try { |
| synchronized (sleepTimesLock) { |
| if (threadSleepTimesNanos == null) { |
| LOG.debug("{} is still sleeping after simulated time disabled.", Thread.currentThread(), new RuntimeException("STACK TRACE")); |
| throw new InterruptedException(); |
| } |
| threadSleepTimesNanos.put(Thread.currentThread(), new AtomicLong(targetTimeNanos)); |
| } |
| while (simulatedCurrTimeNanos.get() < targetTimeNanos) { |
| synchronized (sleepTimesLock) { |
| if (threadSleepTimesNanos == null) { |
| LOG.debug("{} is still sleeping after simulated time disabled.", Thread.currentThread(), new RuntimeException("STACK TRACE")); |
| throw new InterruptedException(); |
| } |
| } |
| long autoAdvance = autoAdvanceNanosOnSleep.get(); |
| if (autoAdvance > 0) { |
| advanceTimeNanos(autoAdvance); |
| } |
| Thread.sleep(10); |
| } |
| } finally { |
| synchronized (sleepTimesLock) { |
| if (simulating.get() && threadSleepTimesNanos != null) { |
| threadSleepTimesNanos.remove(Thread.currentThread()); |
| } |
| } |
| } |
| } |
| |
| public static void sleep(long ms) throws InterruptedException { |
| sleepUntil(currentTimeMillis()+ms); |
| } |
| |
| public static void sleepNanos(long nanos) throws InterruptedException { |
| sleepUntilNanos(nanoTime() + nanos); |
| } |
| |
| public static void sleepSecs (long secs) throws InterruptedException { |
| if (secs > 0) { |
| sleep(secs * 1000); |
| } |
| } |
| |
| public static long nanoTime() { |
| if (simulating.get()) { |
| return simulatedCurrTimeNanos.get(); |
| } else { |
| return System.nanoTime(); |
| } |
| } |
| |
| public static long currentTimeMillis() { |
| if(simulating.get()) { |
| return nanosToMillis(simulatedCurrTimeNanos.get()); |
| } else { |
| return System.currentTimeMillis(); |
| } |
| } |
| |
| public static long nanosToMillis(long nanos) { |
| return nanos/1_000_000; |
| } |
| |
| public static long millisToNanos(long millis) { |
| return millis*1_000_000; |
| } |
| |
| public static long secsToMillis (int secs) { |
| return 1000*(long) secs; |
| } |
| |
| public static long secsToMillisLong(double secs) { |
| return (long) (1000 * secs); |
| } |
| |
| public static int currentTimeSecs() { |
| return (int) (currentTimeMillis() / 1000); |
| } |
| |
| public static int deltaSecs(int timeInSeconds) { |
| return Time.currentTimeSecs() - timeInSeconds; |
| } |
| |
| public static long deltaMs(long timeInMilliseconds) { |
| return Time.currentTimeMillis() - timeInMilliseconds; |
| } |
| |
| public static void advanceTime(long ms) { |
| advanceTimeNanos(millisToNanos(ms)); |
| } |
| |
| public static void advanceTimeNanos(long nanos) { |
| if (!simulating.get()) { |
| throw new IllegalStateException("Cannot simulate time unless in simulation mode"); |
| } |
| if (nanos < 0) { |
| throw new IllegalArgumentException("advanceTime only accepts positive time as an argument"); |
| } |
| long newTime = simulatedCurrTimeNanos.addAndGet(nanos); |
| LOG.debug("Advanced simulated time to {}", newTime); |
| } |
| |
| public static void advanceTimeSecs(long secs) { |
| advanceTime(secs * 1_000); |
| } |
| |
| public static boolean isThreadWaiting(Thread t) { |
| if(!simulating.get()) { |
| throw new IllegalStateException("Must be in simulation mode"); |
| } |
| AtomicLong time; |
| synchronized(sleepTimesLock) { |
| time = threadSleepTimesNanos.get(t); |
| } |
| return !t.isAlive() || time!=null && nanoTime() < time.longValue(); |
| } |
| } |