Add initial ConsoleProxy Monitor skeleton

console-proxy/src/com/cloud/consoleproxy/ConsoleProxyMonitor.java

@@ -0,0 +1,135 @@
+/**
+ *  Copyright (C) 2010 Cloud.com, Inc.  All rights reserved.
+ * 
+ * This software is licensed under the GNU General Public License v3 or later.
+ * 
+ * It is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ * 
+ */
+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.console.Logger;
+
+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() {
+				onShutdown();
+				_quit = true;
+			}
+		});
+		
+		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);
+			}
+			
+			try {
+				_process.waitFor();
+			} catch (InterruptedException e) {
+				// TODO
+			}
+		}
+	}
+	
+	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() {
+	}
+
+	private static void configLog4j() {
+		URL configUrl = System.class.getResource("/conf/log4j-cloud.xml");
+		if(configUrl == null)
+			configUrl = System.class.getClassLoader().getSystemResource("log4j-cloud.xml");
+		
+		if(configUrl == null)
+			configUrl = System.class.getClassLoader().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();
+	}
+}