| /* |
| * Copyright (C) 2006 The Guava Authors |
| * |
| * Licensed 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 com.google.common.util.concurrent; |
| |
| import junit.framework.TestCase; |
| |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * Unit test for {@link SimpleTimeLimiter}. |
| * |
| * @author kevinb |
| */ |
| public class SimpleTimeLimiterTest extends TestCase { |
| |
| private static final int DELAY_MS = 50; |
| private static final int ENOUGH_MS = 500; |
| private static final int NOT_ENOUGH_MS = 5; |
| |
| private TimeLimiter service; |
| |
| private static final ExecutorService executor |
| = Executors.newFixedThreadPool(1); |
| |
| private static String someGoodStaticMethod() throws InterruptedException { |
| TimeUnit.MILLISECONDS.sleep(DELAY_MS); |
| return "yes"; |
| } |
| |
| private static String someBadStaticMethod() throws InterruptedException, |
| SampleException { |
| TimeUnit.MILLISECONDS.sleep(DELAY_MS); |
| throw new SampleException(); |
| } |
| |
| @Override protected void setUp() throws Exception { |
| super.setUp(); |
| service = new SimpleTimeLimiter(executor); |
| } |
| |
| public void testGoodCallableWithEnoughTime() throws Exception { |
| long start = System.nanoTime(); |
| String result = service.callWithTimeout( |
| new Callable<String>() { |
| @Override |
| public String call() throws InterruptedException { |
| return someGoodStaticMethod(); |
| } |
| }, ENOUGH_MS, TimeUnit.MILLISECONDS, true); |
| assertEquals("yes", result); |
| assertTheCallTookBetween(start, DELAY_MS, ENOUGH_MS); |
| } |
| |
| public void testGoodCallableWithNotEnoughTime() throws Exception { |
| long start = System.nanoTime(); |
| try { |
| service.callWithTimeout( |
| new Callable<String>() { |
| @Override |
| public String call() throws InterruptedException { |
| return someGoodStaticMethod(); |
| } |
| }, NOT_ENOUGH_MS, TimeUnit.MILLISECONDS, true); |
| fail("no exception thrown"); |
| } catch (UncheckedTimeoutException expected) { |
| } |
| assertTheCallTookBetween(start, NOT_ENOUGH_MS, DELAY_MS); |
| } |
| |
| public void testBadCallableWithEnoughTime() throws Exception { |
| long start = System.nanoTime(); |
| try { |
| service.callWithTimeout( |
| new Callable<String>() { |
| @Override |
| public String call() throws SampleException, InterruptedException { |
| return someBadStaticMethod(); |
| } |
| }, ENOUGH_MS, TimeUnit.MILLISECONDS, true); |
| fail("no exception thrown"); |
| } catch (SampleException expected) { |
| } |
| assertTheCallTookBetween(start, DELAY_MS, ENOUGH_MS); |
| } |
| |
| public void testBadCallableWithNotEnoughTime() throws Exception { |
| long start = System.nanoTime(); |
| try { |
| service.callWithTimeout( |
| new Callable<String>() { |
| @Override |
| public String call() throws SampleException, InterruptedException { |
| return someBadStaticMethod(); |
| } |
| }, NOT_ENOUGH_MS, TimeUnit.MILLISECONDS, true); |
| fail("no exception thrown"); |
| } catch (UncheckedTimeoutException expected) { |
| } |
| assertTheCallTookBetween(start, NOT_ENOUGH_MS, DELAY_MS); |
| } |
| |
| public void testGoodMethodWithEnoughTime() throws Exception { |
| SampleImpl target = new SampleImpl(); |
| Sample proxy = service.newProxy( |
| target, Sample.class, ENOUGH_MS, TimeUnit.MILLISECONDS); |
| long start = System.nanoTime(); |
| assertEquals("x", proxy.sleepThenReturnInput("x")); |
| assertTheCallTookBetween(start, DELAY_MS, ENOUGH_MS); |
| assertTrue(target.finished); |
| } |
| |
| public void testGoodMethodWithNotEnoughTime() throws Exception { |
| SampleImpl target = new SampleImpl(); |
| Sample proxy = service.newProxy( |
| target, Sample.class, NOT_ENOUGH_MS, TimeUnit.MILLISECONDS); |
| long start = System.nanoTime(); |
| try { |
| proxy.sleepThenReturnInput("x"); |
| fail("no exception thrown"); |
| } catch (UncheckedTimeoutException expected) { |
| } |
| assertTheCallTookBetween(start, NOT_ENOUGH_MS, DELAY_MS); |
| |
| // Is it still computing away anyway? |
| assertFalse(target.finished); |
| TimeUnit.MILLISECONDS.sleep(ENOUGH_MS); |
| assertFalse(target.finished); |
| } |
| |
| public void testBadMethodWithEnoughTime() throws Exception { |
| SampleImpl target = new SampleImpl(); |
| Sample proxy = service.newProxy( |
| target, Sample.class, ENOUGH_MS, TimeUnit.MILLISECONDS); |
| long start = System.nanoTime(); |
| try { |
| proxy.sleepThenThrowException(); |
| fail("no exception thrown"); |
| } catch (SampleException expected) { |
| } |
| assertTheCallTookBetween(start, DELAY_MS, ENOUGH_MS); |
| } |
| |
| public void testBadMethodWithNotEnoughTime() throws Exception { |
| SampleImpl target = new SampleImpl(); |
| Sample proxy = service.newProxy( |
| target, Sample.class, NOT_ENOUGH_MS, TimeUnit.MILLISECONDS); |
| long start = System.nanoTime(); |
| try { |
| proxy.sleepThenThrowException(); |
| fail("no exception thrown"); |
| } catch (UncheckedTimeoutException expected) { |
| } |
| assertTheCallTookBetween(start, NOT_ENOUGH_MS, DELAY_MS); |
| } |
| |
| private static void assertTheCallTookBetween( |
| long startNanos, int atLeastMillis, int atMostMillis) { |
| long nanos = System.nanoTime() - startNanos; |
| assertTrue(nanos >= atLeastMillis * 1000000); |
| assertTrue(nanos <= atMostMillis * 1000000); |
| } |
| |
| public interface Sample { |
| String sleepThenReturnInput(String input); |
| void sleepThenThrowException() throws SampleException; |
| } |
| |
| @SuppressWarnings("serial") |
| public static class SampleException extends Exception {} |
| |
| public static class SampleImpl implements Sample { |
| boolean finished; |
| |
| @Override |
| public String sleepThenReturnInput(String input) { |
| try { |
| TimeUnit.MILLISECONDS.sleep(DELAY_MS); |
| finished = true; |
| return input; |
| } catch (InterruptedException e) { |
| return null; |
| } |
| } |
| @Override |
| public void sleepThenThrowException() throws SampleException { |
| try { |
| TimeUnit.MILLISECONDS.sleep(DELAY_MS); |
| } catch (InterruptedException e) { |
| } |
| throw new SampleException(); |
| } |
| } |
| } |