| /** |
| * 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.hadoop.util; |
| |
| import junit.framework.TestCase; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.util.AsyncDiskService; |
| import org.junit.Test; |
| |
| /** |
| * A test for AsyncDiskService. |
| */ |
| public class TestAsyncDiskService extends TestCase { |
| |
| public static final Log LOG = LogFactory.getLog(TestAsyncDiskService.class); |
| |
| // Access by multiple threads from the ThreadPools in AsyncDiskService. |
| volatile int count; |
| |
| /** An example task for incrementing a counter. |
| */ |
| class ExampleTask implements Runnable { |
| |
| ExampleTask() { |
| } |
| |
| @Override |
| public void run() { |
| synchronized (TestAsyncDiskService.this) { |
| count ++; |
| } |
| } |
| }; |
| |
| |
| /** |
| * This test creates some ExampleTasks and runs them. |
| */ |
| @Test |
| public void testAsyncDiskService() throws Throwable { |
| |
| String[] vols = new String[]{"/0", "/1"}; |
| AsyncDiskService service = new AsyncDiskService(vols); |
| |
| int total = 100; |
| |
| for (int i = 0; i < total; i++) { |
| service.execute(vols[i%2], new ExampleTask()); |
| } |
| |
| Exception e = null; |
| try { |
| service.execute("no_such_volume", new ExampleTask()); |
| } catch (RuntimeException ex) { |
| e = ex; |
| } |
| assertNotNull("Executing a task on a non-existing volume should throw an " |
| + "Exception.", e); |
| |
| service.shutdown(); |
| if (!service.awaitTermination(5000)) { |
| fail("AsyncDiskService didn't shutdown in 5 seconds."); |
| } |
| |
| assertEquals(total, count); |
| } |
| } |