| /* |
| * 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.karaf.tooling.exam.container.internal.runner; |
| |
| import org.ops4j.io.Pipe; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map; |
| |
| public class InternalRunner { |
| |
| private Process m_frameworkProcess; |
| private Thread m_shutdownHook; |
| |
| public synchronized void exec(CommandLineBuilder commandLine, final File workingDirectory, |
| final String[] envOptions) { |
| if (m_frameworkProcess != null) { |
| throw new IllegalStateException("Platform already started"); |
| } |
| |
| try { |
| m_frameworkProcess = |
| Runtime.getRuntime().exec(commandLine.toArray(), createEnvironmentVars(envOptions), |
| workingDirectory); |
| } catch (IOException e) { |
| throw new IllegalStateException("Could not start up the process", e); |
| } |
| |
| m_shutdownHook = createShutdownHook(m_frameworkProcess); |
| Runtime.getRuntime().addShutdownHook(m_shutdownHook); |
| |
| waitForExit(); |
| } |
| |
| private String[] createEnvironmentVars(String[] envOptions) { |
| List<String> env = new ArrayList<String>(); |
| Map<String, String> getenv = System.getenv(); |
| for (String key : getenv.keySet()) { |
| env.add(key + "=" + getenv.get(key)); |
| } |
| if (envOptions != null) { |
| Collections.addAll(env, envOptions); |
| } |
| return env.toArray(new String[env.size()]); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void shutdown() { |
| try { |
| if (m_shutdownHook != null) { |
| synchronized (m_shutdownHook) { |
| if (m_shutdownHook != null) { |
| Runtime.getRuntime().removeShutdownHook(m_shutdownHook); |
| m_frameworkProcess = null; |
| m_shutdownHook.run(); |
| m_shutdownHook = null; |
| } |
| } |
| } |
| } catch (IllegalStateException ignore) { |
| // just ignore |
| } |
| } |
| |
| /** |
| * Wait till the framework process exits. |
| */ |
| public void waitForExit() { |
| synchronized (m_frameworkProcess) { |
| try { |
| m_frameworkProcess.waitFor(); |
| shutdown(); |
| } catch (Throwable e) { |
| shutdown(); |
| } |
| } |
| } |
| |
| /** |
| * Create helper thread to safely shutdown the external framework process |
| * |
| * @param process framework process |
| * @return stream handler |
| */ |
| private Thread createShutdownHook(final Process process) { |
| final Pipe errPipe = new Pipe(process.getErrorStream(), System.err).start("Error pipe"); |
| final Pipe outPipe = new Pipe(process.getInputStream(), System.out).start("Out pipe"); |
| final Pipe inPipe = new Pipe(process.getOutputStream(), System.in).start("In pipe"); |
| |
| return new Thread( |
| new Runnable() { |
| @Override |
| public void run() { |
| inPipe.stop(); |
| outPipe.stop(); |
| errPipe.stop(); |
| |
| try { |
| process.destroy(); |
| } catch (Exception e) { |
| // ignore if already shutting down |
| } |
| } |
| }, |
| "Pax-Runner shutdown hook"); |
| } |
| |
| } |