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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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package sun.tools.jstatd;

import java.rmi.*;
import java.rmi.server.*;
import java.rmi.registry.Registry;
import java.rmi.registry.LocateRegistry;
import java.net.MalformedURLException;
import sun.jvmstat.monitor.remote.*;

Application providing remote access to the jvmstat instrumentation exported by local Java Virtual Machine processes. Remote access is provided through an RMI interface.
Author:Brian Doherty
Since:1.5
/** * Application providing remote access to the jvmstat instrumentation * exported by local Java Virtual Machine processes. Remote access is * provided through an RMI interface. * * @author Brian Doherty * @since 1.5 */
public class Jstatd { private static Registry registry; private static int port = -1; private static boolean startRegistry = true; private static RemoteHost remoteHost; private static void printUsage() { System.err.println("usage: jstatd [-nr] [-p port] [-r rmiport] [-n rminame]\n" + " jstatd -?|-h|--help"); } static void bind(String name, RemoteHost remoteHost) throws RemoteException, MalformedURLException, Exception { try { Naming.rebind(name, remoteHost); } catch (java.rmi.ConnectException e) { /* * either the registry is not running or we cannot contact it. * start an internal registry if requested. */ if (startRegistry && registry == null) { int localport = (port < 0) ? Registry.REGISTRY_PORT : port; registry = LocateRegistry.createRegistry(localport); bind(name, remoteHost); } else { throw e; } } } @SuppressWarnings("deprecation") // Use of RMISecurityManager public static void main(String[] args) { String rminame = null; int rmiPort = 0; int argc = 0; for ( ; (argc < args.length) && (args[argc].startsWith("-")); argc++) { String arg = args[argc]; if (arg.compareTo("-?") == 0 || arg.compareTo("-h") == 0 || arg.compareTo("--help") == 0) { printUsage(); System.exit(0); } else if (arg.compareTo("-nr") == 0) { startRegistry = false; } else if (arg.startsWith("-p")) { if (arg.compareTo("-p") != 0) { port = Integer.parseInt(arg.substring(2)); } else { argc++; if (argc >= args.length) { printUsage(); System.exit(1); } port = Integer.parseInt(args[argc]); } } else if (arg.startsWith("-r")) { if (arg.compareTo("-r") != 0) { rmiPort = Integer.parseInt(arg.substring(2)); } else { argc++; if (argc >= args.length) { printUsage(); System.exit(1); } rmiPort = Integer.parseInt(args[argc]); } } else if (arg.startsWith("-n")) { if (arg.compareTo("-n") != 0) { rminame = arg.substring(2); } else { argc++; if (argc >= args.length) { printUsage(); System.exit(1); } rminame = args[argc]; } } else { printUsage(); System.exit(1); } } if (argc < args.length) { printUsage(); System.exit(1); } if (System.getSecurityManager() == null) { System.setSecurityManager(new RMISecurityManager()); } StringBuilder name = new StringBuilder(); if (port >= 0) { name.append("//:").append(port); } if (rminame == null) { rminame = "JStatRemoteHost"; } name.append("/").append(rminame); try { // use 1.5.0 dynamically generated subs. System.setProperty("java.rmi.server.ignoreSubClasses", "true"); remoteHost = new RemoteHostImpl(rmiPort); RemoteHost stub = (RemoteHost) UnicastRemoteObject.exportObject( remoteHost, rmiPort); bind(name.toString(), stub); System.out.println("jstatd started (bound to " + name.toString() + ")"); System.out.flush(); } catch (MalformedURLException e) { if (rminame != null) { System.out.println("Bad RMI server name: " + rminame); } else { System.out.println("Bad RMI URL: " + name); } e.printStackTrace(System.out); System.exit(1); } catch (java.rmi.ConnectException e) { // could not attach to or create a registry System.out.println("Could not contact RMI registry"); e.printStackTrace(System.out); System.exit(1); } catch (RemoteException e) { System.out.println("Could not bind " + name + " to RMI Registry"); e.printStackTrace(System.out); System.exit(1); } catch (Exception e) { System.out.println("Could not create remote object"); e.printStackTrace(System.out); System.exit(1); } } }