// Copyright 2012 Citrix Systems, Inc. Licensed under the
// Apache License, Version 2.0 (the "License"); you may not use this
// file except in compliance with the License. Citrix Systems, Inc.
// reserves all rights not expressly granted by 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.
//
// Automatically generated by addcopyright.py at 04/03/2012
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();
}
}