Java tutorial
/* * NOTE: This copyright does *not* cover user programs that use HQ * program services by normal system calls through the application * program interfaces provided as part of the Hyperic Plug-in Development * Kit or the Hyperic Client Development Kit - this is merely considered * normal use of the program, and does *not* fall under the heading of * "derived work". * * Copyright (C) [2004, 2005, 2006], Hyperic, Inc. * This file is part of HQ. * * HQ is free software; you can redistribute it and/or modify * it under the terms version 2 of the GNU General Public License as * published by the Free Software Foundation. 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, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA. */ package org.hyperic.hq.product.jmx; import java.net.MalformedURLException; import java.util.ArrayList; import java.util.Arrays; import java.util.Iterator; import java.util.Properties; import java.util.Set; import javax.management.MBeanAttributeInfo; import javax.management.MBeanInfo; import javax.management.MBeanOperationInfo; import javax.management.MBeanParameterInfo; import javax.management.MBeanServerConnection; import javax.management.MalformedObjectNameException; import javax.management.ObjectName; import javax.management.remote.JMXServiceURL; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; public class MBeanDumper { private static Log log = LogFactory.getLog(MBeanDumper.class); protected Properties _config; private MBeanServerConnection _server; protected static final String PROP_JMX_QUERY = "jmx.query"; private static final String DEFAULT_URL = "service:jmx:rmi://localhost/jndi/rmi://localhost:1099/jmxrmi"; protected boolean isValidObjectName(String name) { try { new ObjectName(name); return true; } catch (MalformedObjectNameException e) { return false; } } protected boolean isValidURL(String url) { if (url.startsWith(MxUtil.PTQL_PREFIX)) { return true; } try { new JMXServiceURL(url); return true; } catch (MalformedURLException e) { return false; } } protected Properties getConfig(String[] args) { _config = new Properties(); String url = DEFAULT_URL; String query = "*:*"; String user = System.getProperty("user"); String pass = System.getProperty("pass"); for (int i = 0; i < args.length; i++) { String arg = args[i]; if (isValidURL(arg)) { url = arg; } else if (isValidObjectName(arg)) { query = arg; } else if (user == null) { user = arg; } else if (pass == null) { pass = arg; } else { throw new IllegalArgumentException("Invalid argument: " + arg); } } _config.putAll(System.getProperties()); if (_config.getProperty(MxUtil.PROP_JMX_URL) == null) { _config.setProperty(MxUtil.PROP_JMX_URL, url); } if (_config.getProperty(PROP_JMX_QUERY) == null) { _config.setProperty(PROP_JMX_QUERY, query); } if (user != null) { _config.setProperty(MxUtil.PROP_JMX_USERNAME, user); } if (pass != null) { _config.setProperty(MxUtil.PROP_JMX_PASSWORD, pass); } String[][] keys = getPropertyMap(); for (int i = 0; i < keys.length; i++) { _config.setProperty(keys[i][1], _config.getProperty(keys[i][0])); } return _config; } protected String[][] getPropertyMap() { return new String[0][0]; } protected MBeanServerConnection getMBeanServer(Properties config) throws Exception { _server = MxUtil.getMBeanServer(config); return _server; } protected MBeanInfo getMBeanInfo(ObjectName obj) throws Exception { return _server.getMBeanInfo(obj); } protected Object getAttribute(ObjectName obj, String name) throws Exception { return _server.getAttribute(obj, name); } protected ObjectName getQuery() { String query = _config.getProperty(PROP_JMX_QUERY); try { return new ObjectName(query); } catch (Exception e) { throw new IllegalArgumentException(query); } } public void dump(String[] args) throws Exception { dump(getConfig(args)); } public void dump(Properties config) throws Exception { MBeanServerConnection mServer = getMBeanServer(config); dump(mServer.queryNames(getQuery(), null)); } public void dump(Set beans) { Iterator iter = beans.iterator(); while (iter.hasNext()) { ObjectName obj = (ObjectName) iter.next(); try { MBeanInfo info = getMBeanInfo(obj); System.out.println("MBean: " + info.getClassName()); System.out.println("Name: " + obj); MBeanAttributeInfo[] attrs = info.getAttributes(); for (int k = 0; k < attrs.length; k++) { String name = attrs[k].getName(); String value = "null"; try { Object o = getAttribute(obj, name); if (o != null) { if (o.getClass().isArray()) { value = Arrays.asList((Object[]) o).toString(); } else { value = o.toString(); } } } catch (Exception e) { value = "ERROR"; if (log.isDebugEnabled()) { e.printStackTrace(); } } String perms = ""; if (attrs[k].isReadable()) { perms += "r"; } if (attrs[k].isWritable()) { perms += "w"; } System.out.println("\t" + k + ". Attribute: " + name + " = " + value + " (" + perms + ")"); } MBeanOperationInfo[] ops = info.getOperations(); for (int i = 0; i < ops.length; i++) { ArrayList sig = new ArrayList(); MBeanParameterInfo[] params = ops[i].getSignature(); for (int j = 0; j < params.length; j++) { sig.add(params[j].getType()); } System.out.println( "\t Operation: " + ops[i].getReturnType() + " " + ops[i].getName() + " " + sig); } } catch (Exception e) { if (log.isDebugEnabled()) { e.printStackTrace(); } } System.out.println(""); } } public static void main(String[] args) throws Exception { new MBeanDumper().dump(args); } }