| /* |
| * Copyright 2017-present Open Networking Foundation |
| * |
| * 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 org.onlab.util; |
| |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.Executor; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.junit.Test; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| /** |
| * Blocking-aware future test. |
| */ |
| public class BlockingAwareFutureTest { |
| |
| /** |
| * Tests normal callback execution. |
| */ |
| @Test |
| public void testNonBlockingThread() throws Exception { |
| CompletableFuture<String> future = new CompletableFuture<>(); |
| Executor executor = SharedExecutors.getPoolThreadExecutor(); |
| BlockingAwareFuture<String> blockingFuture = |
| (BlockingAwareFuture<String>) Tools.orderedFuture(future, new OrderedExecutor(executor), executor); |
| CountDownLatch latch = new CountDownLatch(1); |
| blockingFuture.thenRun(() -> latch.countDown()); |
| executor.execute(() -> future.complete("foo")); |
| latch.await(5, TimeUnit.SECONDS); |
| assertEquals(0, latch.getCount()); |
| assertEquals("foo", blockingFuture.join()); |
| assertFalse(blockingFuture.isBlocked()); |
| } |
| |
| /** |
| * Tests blocking an ordered thread. |
| */ |
| @Test |
| public void testBlockingThread() throws Exception { |
| CompletableFuture<String> future = new CompletableFuture<>(); |
| Executor executor = SharedExecutors.getPoolThreadExecutor(); |
| BlockingAwareFuture<String> blockingFuture = |
| (BlockingAwareFuture<String>) Tools.orderedFuture(future, new OrderedExecutor(executor), executor); |
| CountDownLatch latch = new CountDownLatch(2); |
| CompletableFuture<String> wrappedFuture = blockingFuture.thenApply(v -> { |
| assertEquals("foo", v); |
| latch.countDown(); |
| return v; |
| }); |
| wrappedFuture.thenRun(() -> latch.countDown()); |
| executor.execute(() -> wrappedFuture.join()); |
| Thread.sleep(100); |
| assertTrue(blockingFuture.isBlocked()); |
| future.complete("foo"); |
| latch.await(5, TimeUnit.SECONDS); |
| assertEquals(0, latch.getCount()); |
| assertEquals("foo", blockingFuture.join()); |
| assertEquals("foo", wrappedFuture.join()); |
| assertFalse(blockingFuture.isBlocked()); |
| } |
| |
| } |