| /* |
| * 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.example.yarn; |
| |
| import com.google.common.base.Joiner; |
| import com.google.common.base.Splitter; |
| import com.google.common.collect.Iterables; |
| import com.google.common.collect.Lists; |
| import com.google.common.util.concurrent.Futures; |
| import org.apache.hadoop.yarn.conf.YarnConfiguration; |
| import org.apache.twill.api.AbstractTwillRunnable; |
| import org.apache.twill.api.ClassAcceptor; |
| import org.apache.twill.api.TwillController; |
| import org.apache.twill.api.TwillRunnerService; |
| import org.apache.twill.api.logging.PrinterLogHandler; |
| import org.apache.twill.yarn.YarnTwillRunnerService; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.PrintWriter; |
| import java.net.URL; |
| import java.util.List; |
| import java.util.concurrent.ExecutionException; |
| |
| /** |
| * Hello World example using twill-yarn to run a TwillApplication over YARN. |
| */ |
| public class HelloWorld { |
| public static final Logger LOG = LoggerFactory.getLogger(HelloWorld.class); |
| |
| /** |
| * Hello World runnable that is provided to TwillRunnerService to be run. |
| */ |
| private static class HelloWorldRunnable extends AbstractTwillRunnable { |
| @Override |
| public void run() { |
| LOG.info("Hello World. My first distributed application."); |
| } |
| |
| @Override |
| public void stop() { |
| } |
| } |
| |
| public static void main(String[] args) { |
| if (args.length < 1) { |
| System.err.println("Arguments format: <host:port of zookeeper server>"); |
| System.exit(1); |
| } |
| |
| String zkStr = args[0]; |
| YarnConfiguration yarnConfiguration = new YarnConfiguration(); |
| final TwillRunnerService twillRunner = new YarnTwillRunnerService(yarnConfiguration, zkStr); |
| twillRunner.start(); |
| |
| String yarnClasspath = |
| yarnConfiguration.get(YarnConfiguration.YARN_APPLICATION_CLASSPATH, |
| Joiner.on(",").join(YarnConfiguration.DEFAULT_YARN_APPLICATION_CLASSPATH)); |
| List<String> applicationClassPaths = Lists.newArrayList(); |
| Iterables.addAll(applicationClassPaths, Splitter.on(",").split(yarnClasspath)); |
| final TwillController controller = twillRunner.prepare(new HelloWorldRunnable()) |
| .addLogHandler(new PrinterLogHandler(new PrintWriter(System.out, true))) |
| .withApplicationClassPaths(applicationClassPaths) |
| .withBundlerClassAcceptor(new HadoopClassExcluder()) |
| .start(); |
| |
| Runtime.getRuntime().addShutdownHook(new Thread() { |
| @Override |
| public void run() { |
| try { |
| Futures.getUnchecked(controller.terminate()); |
| } finally { |
| twillRunner.stop(); |
| } |
| } |
| }); |
| |
| try { |
| controller.awaitTerminated(); |
| } catch (ExecutionException e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| static class HadoopClassExcluder extends ClassAcceptor { |
| @Override |
| public boolean accept(String className, URL classUrl, URL classPathUrl) { |
| // exclude hadoop but not hbase package |
| return !(className.startsWith("org.apache.hadoop") && !className.startsWith("org.apache.hadoop.hbase")); |
| } |
| } |
| } |