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Java Management Extensions (JMX) technology provides the tools for building distributed,
Web-based, modular and dynamic solutions for managing and monitoring devices, applications,
and service-driven networks. By design, this standard is suitable for adapting legacy systems,
implementing new management and monitoring solutions, and plugging into those of the future.
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/*
* @(#)file SocketConnectionServer.java
* @(#)author Sun Microsystems, Inc.
* @(#)version 1.18
* @(#)lastedit 07/03/08
* @(#)build @BUILD_TAG_PLACEHOLDER@
*
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2007 Sun Microsystems, Inc. All Rights Reserved.
*
* The contents of this file are subject to the terms of either the GNU General
* Public License Version 2 only ("GPL") or the Common Development and
* Distribution License("CDDL")(collectively, the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy of the
* License at http://opendmk.dev.java.net/legal_notices/licenses.txt or in the
* LEGAL_NOTICES folder that accompanied this code. See the License for the
* specific language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file found at
* http://opendmk.dev.java.net/legal_notices/licenses.txt
* or in the LEGAL_NOTICES folder that accompanied this code.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code.
*
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
*
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*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding
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* "[Contributor] elects to include this software in this distribution
* under the [CDDL or GPL Version 2] license."
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* Version 2, or to extend the choice of license to its licensees as provided
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*/
package com.sun.jmx.remote.socket;
import java.util.Map;
import java.util.HashMap;
import java.io.IOException;
import java.net.Socket;
import java.net.ServerSocket;
import java.net.InetAddress;
import java.net.MalformedURLException;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
import javax.management.remote.JMXServiceURL;
import javax.management.remote.jmxmp.JMXMPConnectorServer;
import javax.management.remote.generic.MessageConnection;
import javax.management.remote.generic.MessageConnectionServer;
import com.sun.jmx.remote.generic.DefaultConfig;
import com.sun.jmx.remote.opt.util.ClassLogger;
import com.sun.jmx.remote.opt.util.EnvHelp;
/**
* This class uses a Tcp Server Socket to realize a JMX connection server
*/
public class SocketConnectionServer implements MessageConnectionServer {
public SocketConnectionServer(JMXServiceURL addr, Map env)
throws IOException {
if (logger.traceOn()) {
logger.trace("constructor", "Constructs a SocketConnectionServer on "+addr);
}
if (addr == null) {
throw new NullPointerException("Null address.");
}
if (!DEFAULT_PROTOCOL.equalsIgnoreCase(addr.getProtocol())) {
throw new MalformedURLException("Unknown protocol: " +
addr.getProtocol());
}
String wildcardS = null;
if (env != null) {
wildcardS =
(String)env.get(JMXMPConnectorServer.SERVER_ADDRESS_WILDCARD);
}
wildcard =
(wildcardS == null) ? true : wildcardS.equalsIgnoreCase("true");
this.addr = addr;
}
// implements MessageConnectionServer interface
public void start(Map env) throws IOException {
if (logger.traceOn()) {
logger.trace("start", "Starts the server now.");
}
Map newEnv = new HashMap();
if (this.env != null)
newEnv.putAll(this.env);
if (env != null)
newEnv.putAll(env);
final int port = addr.getPort();
String host = addr.getHost();
if (host.equals(""))
host = InetAddress.getLocalHost().getHostName();
/* In the wildcard case, the following socket creation just
* serves to check that the address in the URL is a valid
* local address. */
if (wildcard) {
ss = new ServerSocket(0, DEFAULT_BACKLOG, InetAddress.getByName(host));
ss.close();
}
Object o = null;
try {
Class c = Class.forName("java.net.InetSocketAddress");
if (wildcard) {
Constructor ct = c.getDeclaredConstructor(new Class[] {int.class});
o = ct.newInstance(new Object[] {new Integer(port)});
} else {
Constructor ct = c.getDeclaredConstructor(new Class[]
{String.class, int.class});
o = ct.newInstance(new Object[] {host, new Integer(port)});
}
} catch (Exception ee) {
// OK.
// we are using JDK1.3 or earlier
}
if ( o != null && DefaultConfig.getServerReuseAddress(newEnv)) {
try {
Class cc = ServerSocket.class;
Method m1 = cc.getMethod("setReuseAddress", new Class[]
{boolean.class});
Method m2 = cc.getMethod("bind", new Class[]
{Class.forName("java.net.SocketAddress"), int.class});
ss = (ServerSocket)cc.newInstance();
// setReusAddress
m1.invoke(ss, new Object[] {Boolean.TRUE});
// bind
m2.invoke(ss, new Object[] {o, new Integer(DEFAULT_BACKLOG)});
} catch (RuntimeException re) {
throw re;
} catch (Exception e) {
if (e instanceof InvocationTargetException) {
Throwable t = ((InvocationTargetException)e).getTargetException();
if (t instanceof IOException) {
throw (IOException)t;
} else if (t instanceof RuntimeException) {
throw (RuntimeException)t;
} else if (t instanceof Exception) {
e = (Exception)t;
}
}
/* possible: ClassNotFoundException,
NoSuchMethodException,
IllegalAccessException,
InstantiationException,
InvocationTargetException (getCause() == null or == Error)
*/
IOException ioe = new IOException(e.toString());
EnvHelp.initCause(ioe, e);
throw ioe;
}
} else { // 1.3 or earlier or not reuse address
if (wildcard) {
ss = new ServerSocket(port, DEFAULT_BACKLOG);
} else {
ss = new ServerSocket(port, DEFAULT_BACKLOG, InetAddress.getByName(host));
}
}
addr = new JMXServiceURL(DEFAULT_PROTOCOL, host, ss.getLocalPort());
this.env = newEnv;
}
public MessageConnection accept() throws IOException {
if (logger.traceOn()) {
logger.trace("accept", "Waiting a new connection...");
}
MessageConnection mc = new SocketConnection(ss.accept());
return mc;
}
public void stop() throws IOException {
if (logger.traceOn()) {
logger.trace("stop", "Stops the server now.");
}
if (ss != null) {
ss.close();
}
}
public JMXServiceURL getAddress() {
return addr;
}
// private variables
private ServerSocket ss;
private JMXServiceURL addr;
private boolean wildcard;
private Map env;
private static final String DEFAULT_PROTOCOL = "jmxmp";
private static final int DEFAULT_BACKLOG = 100;
private final ClassLogger logger = new ClassLogger("javax.management.remote.misc", "SocketConnectionServer");
}