| /* |
| * 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.camel; |
| |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.LinkedBlockingQueue; |
| import java.util.concurrent.RejectedExecutionException; |
| import java.util.concurrent.RejectedExecutionHandler; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import org.apache.camel.util.concurrent.Rejectable; |
| import org.apache.camel.util.concurrent.RejectableThreadPoolExecutor; |
| import org.apache.camel.util.concurrent.ThreadPoolRejectedPolicy; |
| import org.junit.Test; |
| |
| public class ThreadPoolRejectedPolicyTest extends TestSupport { |
| |
| @Test |
| public void testAbortAsRejectedExecutionHandler() throws InterruptedException { |
| |
| final ExecutorService executorService = createTestExecutorService(ThreadPoolRejectedPolicy.Abort.asRejectedExecutionHandler()); |
| |
| final MockCallable<String> task1 = new MockCallable<>(); |
| final Future<?> result1 = executorService.submit(task1); |
| final MockRunnable task2 = new MockRunnable(); |
| final Future<?> result2 = executorService.submit(task2); |
| final MockCallable<String> task3 = new MockCallable<>(); |
| try { |
| executorService.submit(task3); |
| fail("Third task should have been rejected by a threadpool is full with 1 task and queue is full with 1 task."); |
| } catch (RejectedExecutionException e) { |
| } |
| |
| shutdownAndAwait(executorService); |
| |
| assertInvoked(task1, result1); |
| assertInvoked(task2, result2); |
| assertRejected(task3, null); |
| } |
| |
| @Test |
| public void testAbortAsRejectedExecutionHandlerWithRejectableTasks() throws InterruptedException { |
| |
| final ExecutorService executorService = createTestExecutorService(ThreadPoolRejectedPolicy.Abort.asRejectedExecutionHandler()); |
| |
| final MockRejectableRunnable task1 = new MockRejectableRunnable(); |
| final Future<?> result1 = executorService.submit(task1); |
| final MockRejectableCallable<String> task2 = new MockRejectableCallable<>(); |
| final Future<?> result2 = executorService.submit(task2); |
| final MockRejectableRunnable task3 = new MockRejectableRunnable(); |
| final Future<?> result3 = executorService.submit(task3); |
| |
| final MockRejectableCallable<String> task4 = new MockRejectableCallable<>(); |
| final Future<?> result4 = executorService.submit(task4); |
| |
| shutdownAndAwait(executorService); |
| |
| assertInvoked(task1, result1); |
| assertInvoked(task2, result2); |
| assertRejected(task3, result3); |
| assertRejected(task4, result4); |
| } |
| |
| @Test |
| public void testCallerRunsAsRejectedExecutionHandler() throws InterruptedException { |
| |
| final ExecutorService executorService = createTestExecutorService(ThreadPoolRejectedPolicy.CallerRuns.asRejectedExecutionHandler()); |
| |
| final MockRunnable task1 = new MockRunnable(); |
| final Future<?> result1 = executorService.submit(task1); |
| final MockRunnable task2 = new MockRunnable(); |
| final Future<?> result2 = executorService.submit(task2); |
| final MockRunnable task3 = new MockRunnable(); |
| final Future<?> result3 = executorService.submit(task3); |
| |
| shutdownAndAwait(executorService); |
| |
| assertInvoked(task1, result1); |
| assertInvoked(task2, result2); |
| assertInvoked(task3, result3); |
| } |
| |
| @Test |
| public void testCallerRunsAsRejectedExecutionHandlerWithRejectableTasks() throws InterruptedException { |
| |
| final ExecutorService executorService = createTestExecutorService(ThreadPoolRejectedPolicy.CallerRuns.asRejectedExecutionHandler()); |
| |
| final MockRejectableRunnable task1 = new MockRejectableRunnable(); |
| final Future<?> result1 = executorService.submit(task1); |
| final MockRejectableRunnable task2 = new MockRejectableRunnable(); |
| final Future<?> result2 = executorService.submit(task2); |
| final MockRejectableRunnable task3 = new MockRejectableRunnable(); |
| final Future<?> result3 = executorService.submit(task3); |
| |
| shutdownAndAwait(executorService); |
| |
| assertInvoked(task1, result1); |
| assertInvoked(task2, result2); |
| assertInvoked(task3, result3); |
| } |
| |
| @Test |
| public void testDiscardAsRejectedExecutionHandler() throws InterruptedException { |
| |
| final ExecutorService executorService = createTestExecutorService(ThreadPoolRejectedPolicy.Discard.asRejectedExecutionHandler()); |
| |
| final MockRunnable task1 = new MockRunnable(); |
| final Future<?> result1 = executorService.submit(task1); |
| final MockRunnable task2 = new MockRunnable(); |
| final Future<?> result2 = executorService.submit(task2); |
| final MockRunnable task3 = new MockRunnable(); |
| final Future<?> result3 = executorService.submit(task3); |
| |
| shutdownAndAwait(executorService); |
| |
| assertInvoked(task1, result1); |
| assertInvoked(task2, result2); |
| assertRejected(task3, result3); |
| } |
| |
| @Test |
| public void testDiscardAsRejectedExecutionHandlerWithRejectableTasks() throws InterruptedException { |
| |
| final ExecutorService executorService = createTestExecutorService(ThreadPoolRejectedPolicy.Discard.asRejectedExecutionHandler()); |
| |
| final MockRejectableRunnable task1 = new MockRejectableRunnable(); |
| final Future<?> result1 = executorService.submit(task1); |
| final MockRejectableRunnable task2 = new MockRejectableRunnable(); |
| final Future<?> result2 = executorService.submit(task2); |
| final MockRejectableRunnable task3 = new MockRejectableRunnable(); |
| final Future<?> result3 = executorService.submit(task3); |
| |
| shutdownAndAwait(executorService); |
| |
| assertInvoked(task1, result1); |
| assertInvoked(task2, result2); |
| assertRejected(task3, result3); |
| } |
| |
| @Test |
| public void testDiscardOldestAsRejectedExecutionHandler() throws InterruptedException { |
| |
| final ExecutorService executorService = createTestExecutorService(ThreadPoolRejectedPolicy.DiscardOldest.asRejectedExecutionHandler()); |
| |
| final MockRunnable task1 = new MockRunnable(); |
| final Future<?> result1 = executorService.submit(task1); |
| final MockRunnable task2 = new MockRunnable(); |
| final Future<?> result2 = executorService.submit(task2); |
| final MockRunnable task3 = new MockRunnable(); |
| final Future<?> result3 = executorService.submit(task3); |
| |
| shutdownAndAwait(executorService); |
| |
| assertInvoked(task1, result1); |
| assertRejected(task2, result2); |
| assertInvoked(task3, result3); |
| } |
| |
| @Test |
| public void testDiscardOldestAsRejectedExecutionHandlerWithRejectableTasks() throws InterruptedException { |
| |
| final ExecutorService executorService = createTestExecutorService(ThreadPoolRejectedPolicy.DiscardOldest.asRejectedExecutionHandler()); |
| |
| final MockRejectableRunnable task1 = new MockRejectableRunnable(); |
| final Future<?> result1 = executorService.submit(task1); |
| final MockRejectableRunnable task2 = new MockRejectableRunnable(); |
| final Future<?> result2 = executorService.submit(task2); |
| final MockRejectableRunnable task3 = new MockRejectableRunnable(); |
| final Future<?> result3 = executorService.submit(task3); |
| |
| shutdownAndAwait(executorService); |
| |
| assertInvoked(task1, result1); |
| assertRejected(task2, result2); |
| assertInvoked(task3, result3); |
| } |
| |
| private ExecutorService createTestExecutorService(final RejectedExecutionHandler rejectedExecutionHandler) { |
| return new RejectableThreadPoolExecutor(1, 1, 30, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>(1), rejectedExecutionHandler); |
| } |
| |
| private void shutdownAndAwait(final ExecutorService executorService) { |
| executorService.shutdown(); |
| try { |
| assertTrue("Test ExecutorService shutdown is not expected to take longer than 10 seconds.", executorService.awaitTermination(10, TimeUnit.SECONDS)); |
| } catch (InterruptedException e) { |
| fail("Test ExecutorService shutdown is not expected to be interrupted."); |
| } |
| } |
| |
| private void assertInvoked(MockTask task, Future<?> result) { |
| assertTrue(result.isDone()); |
| assertEquals(1, task.getInvocationCount()); |
| if (task instanceof Rejectable) { |
| assertEquals(0, task.getRejectionCount()); |
| } |
| } |
| |
| private void assertRejected(MockTask task, Future<?> result) { |
| if (result != null) { |
| assertFalse(result.isDone()); |
| } |
| assertEquals(0, task.getInvocationCount()); |
| if (task instanceof Rejectable) { |
| assertEquals(1, task.getRejectionCount()); |
| } |
| } |
| |
| private abstract static class MockTask { |
| private final AtomicInteger invocationCount = new AtomicInteger(); |
| |
| private final AtomicInteger rejectionCount = new AtomicInteger(); |
| |
| public int getInvocationCount() { |
| return invocationCount.get(); |
| } |
| |
| protected void countInvocation() { |
| invocationCount.incrementAndGet(); |
| } |
| |
| public int getRejectionCount() { |
| return rejectionCount.get(); |
| } |
| |
| protected void countRejection() { |
| rejectionCount.incrementAndGet(); |
| } |
| } |
| |
| private static class MockRunnable extends MockTask implements Runnable { |
| @Override |
| public void run() { |
| countInvocation(); |
| try { |
| TimeUnit.MILLISECONDS.sleep(100); |
| } catch (InterruptedException e) { |
| fail("MockRunnable task is not expected to be interrupted."); |
| } |
| } |
| } |
| |
| private static class MockRejectableRunnable extends MockRunnable implements Rejectable { |
| @Override |
| public void reject() { |
| countRejection(); |
| } |
| } |
| |
| private static class MockCallable<T> extends MockTask implements Callable<T> { |
| @Override |
| public T call() throws Exception { |
| countInvocation(); |
| try { |
| TimeUnit.MILLISECONDS.sleep(100); |
| } catch (InterruptedException e) { |
| fail("MockCallable task is not expected to be interrupted."); |
| } |
| return null; |
| } |
| } |
| |
| private static class MockRejectableCallable<T> extends MockCallable<T> implements Rejectable { |
| @Override |
| public void reject() { |
| countRejection(); |
| } |
| } |
| } |