| /* |
| * 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.twill.test; |
| |
| import com.google.common.util.concurrent.Uninterruptibles; |
| import org.apache.twill.api.AbstractTwillRunnable; |
| import org.apache.twill.api.TwillController; |
| import org.apache.twill.api.TwillRunnable; |
| import org.apache.twill.api.TwillRunner; |
| import org.apache.twill.api.logging.PrinterLogHandler; |
| import org.apache.twill.yarn.BaseYarnTest; |
| import org.junit.Assert; |
| import org.junit.Test; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.PrintWriter; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| |
| /** |
| * Unit test for running twill under Java8. |
| */ |
| public class Java8Test extends BaseYarnTest { |
| |
| @Test |
| public void test() throws ExecutionException, InterruptedException, TimeoutException { |
| TwillRunner runner = getTwillRunner(); |
| |
| // Start the TestRunnable and make sure it is executed with the log message emitted. |
| CountDownLatch logLatch = new CountDownLatch(1); |
| TwillController controller = runner.prepare(new TestRunnable()) |
| .addLogHandler(new PrinterLogHandler(new PrintWriter(System.out, true))) |
| .addLogHandler(logEntry -> { |
| if ("Hello World".equals(logEntry.getMessage())) { |
| logLatch.countDown(); |
| } |
| }) |
| .start(); |
| |
| Assert.assertTrue(logLatch.await(120, TimeUnit.SECONDS)); |
| controller.terminate().get(120, TimeUnit.SECONDS); |
| } |
| |
| /** |
| * A {@link TwillRunnable} that emits a log message and wait to be stopped. |
| */ |
| public static final class TestRunnable extends AbstractTwillRunnable { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(TestRunnable.class); |
| |
| private final CountDownLatch stopLatch = new CountDownLatch(1); |
| |
| @Override |
| public void run() { |
| LOG.info(Compute.getMessage()); |
| Uninterruptibles.awaitUninterruptibly(stopLatch); |
| } |
| |
| @Override |
| public void stop() { |
| stopLatch.countDown(); |
| } |
| } |
| |
| /** |
| * An interface with static method, which is a Java 8 feature. |
| */ |
| public interface Compute { |
| static String getMessage() { |
| return "Hello World"; |
| } |
| } |
| } |