| // 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 com.cloud.consoleproxy; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.net.URISyntaxException; |
| import java.net.URL; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.log4j.xml.DOMConfigurator; |
| |
| import com.cloud.consoleproxy.util.Logger; |
| |
| // |
| // |
| // I switched to a simpler solution to monitor only unrecoverable exceptions, under these cases, console proxy process will exit |
| // itself and the shell script will re-launch console proxy |
| // |
| public class ConsoleProxyMonitor { |
| private static final Logger s_logger = Logger.getLogger(ConsoleProxyMonitor.class); |
| |
| private String[] _argv; |
| private Map<String, String> _argMap = new HashMap<String, String>(); |
| |
| private volatile Process _process; |
| private boolean _quit = false; |
| |
| public ConsoleProxyMonitor(String[] argv) { |
| _argv = argv; |
| |
| for (String arg : _argv) { |
| String[] tokens = arg.split("="); |
| if (tokens.length == 2) { |
| s_logger.info("Add argument " + tokens[0] + "=" + tokens[1] + " to the argument map"); |
| |
| _argMap.put(tokens[0].trim(), tokens[1].trim()); |
| } else { |
| s_logger.warn("unrecognized argument, skip adding it to argument map"); |
| } |
| } |
| } |
| |
| private void run() { |
| Runtime.getRuntime().addShutdownHook(new Thread() { |
| @Override |
| public void run() { |
| _quit = true; |
| onShutdown(); |
| } |
| }); |
| |
| while (!_quit) { |
| String cmdLine = getLaunchCommandLine(); |
| |
| s_logger.info("Launch console proxy process with command line: " + cmdLine); |
| |
| try { |
| _process = Runtime.getRuntime().exec(cmdLine); |
| } catch (IOException e) { |
| s_logger.error("Unexpected exception ", e); |
| System.exit(1); |
| } |
| |
| boolean waitSucceeded = false; |
| int exitCode = 0; |
| while (!waitSucceeded) { |
| try { |
| exitCode = _process.waitFor(); |
| waitSucceeded = true; |
| |
| if (s_logger.isInfoEnabled()) |
| s_logger.info("Console proxy process exits with code: " + exitCode); |
| } catch (InterruptedException e) { |
| if (s_logger.isInfoEnabled()) |
| s_logger.info("InterruptedException while waiting for termination of console proxy, will retry"); |
| } |
| } |
| } |
| } |
| |
| private String getLaunchCommandLine() { |
| StringBuffer sb = new StringBuffer("java "); |
| String jvmOptions = _argMap.get("jvmoptions"); |
| |
| if (jvmOptions != null) |
| sb.append(jvmOptions); |
| |
| for (Map.Entry<String, String> entry : _argMap.entrySet()) { |
| if (!"jvmoptions".equalsIgnoreCase(entry.getKey())) |
| sb.append(" ").append(entry.getKey()).append("=").append(entry.getValue()); |
| } |
| |
| return sb.toString(); |
| } |
| |
| private void onShutdown() { |
| if (_process != null) { |
| if (s_logger.isInfoEnabled()) |
| s_logger.info("Console proxy monitor shuts dwon, terminate console proxy process"); |
| _process.destroy(); |
| } |
| } |
| |
| private static void configLog4j() { |
| URL configUrl = System.class.getResource("/conf/log4j-cloud.xml"); |
| if (configUrl == null) |
| configUrl = ClassLoader.getSystemResource("log4j-cloud.xml"); |
| |
| if (configUrl == null) |
| configUrl = ClassLoader.getSystemResource("conf/log4j-cloud.xml"); |
| |
| if (configUrl != null) { |
| try { |
| System.out.println("Configure log4j using " + configUrl.toURI().toString()); |
| } catch (URISyntaxException e1) { |
| e1.printStackTrace(); |
| } |
| |
| try { |
| File file = new File(configUrl.toURI()); |
| |
| System.out.println("Log4j configuration from : " + file.getAbsolutePath()); |
| DOMConfigurator.configureAndWatch(file.getAbsolutePath(), 10000); |
| } catch (URISyntaxException e) { |
| System.out.println("Unable to convert log4j configuration Url to URI"); |
| } |
| } else { |
| System.out.println("Configure log4j with default properties"); |
| } |
| } |
| |
| public static void main(String[] argv) { |
| configLog4j(); |
| (new ConsoleProxyMonitor(argv)).run(); |
| } |
| } |