| /* |
| * 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.yarn; |
| |
| import com.google.common.base.Charsets; |
| import com.google.common.base.Joiner; |
| import com.google.common.base.Splitter; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableMap; |
| import org.apache.twill.api.AbstractTwillRunnable; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.BufferedReader; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| |
| /** |
| * |
| */ |
| public final class DistributedShell extends AbstractTwillRunnable { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(DistributedShell.class); |
| |
| public DistributedShell(String...commands) { |
| super(ImmutableMap.of("cmds", Joiner.on(';').join(commands))); |
| } |
| |
| @Override |
| public void run() { |
| for (String cmd : Splitter.on(';').split(getArgument("cmds"))) { |
| try { |
| Process process = new ProcessBuilder(ImmutableList.copyOf(Splitter.on(' ').split(cmd))) |
| .redirectErrorStream(true).start(); |
| try ( |
| BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream(), Charsets.US_ASCII)) |
| ) { |
| String line = reader.readLine(); |
| while (line != null) { |
| LOG.info(line); |
| line = reader.readLine(); |
| } |
| } |
| } catch (IOException e) { |
| LOG.error("Fail to execute command " + cmd, e); |
| } |
| } |
| } |
| |
| @Override |
| public void stop() { |
| // No-op |
| } |
| } |