1 /* 2 * Copyright (c) 2004, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.tools.jstatd; 27 28 import java.rmi.*; 29 import java.rmi.server.*; 30 import java.rmi.registry.Registry; 31 import java.rmi.registry.LocateRegistry; 32 import java.net.MalformedURLException; 33 import sun.jvmstat.monitor.remote.*; 34 35 /** 36 * Application providing remote access to the jvmstat instrumentation 37 * exported by local Java Virtual Machine processes. Remote access is 38 * provided through an RMI interface. 39 * 40 * @author Brian Doherty 41 * @since 1.5 42 */ 43 public class Jstatd { 44 45 private static Registry registry; 46 private static int port = -1; 47 private static boolean startRegistry = true; 48 49 private static void printUsage() { 50 System.err.println("usage: jstatd [-nr] [-p port] [-n rminame]"); 51 } 52 53 static void bind(String name, RemoteHostImpl remoteHost) 54 throws RemoteException, MalformedURLException, Exception { 55 56 try { 57 Naming.rebind(name, remoteHost); 58 } catch (java.rmi.ConnectException e) { 59 /* 60 * either the registry is not running or we cannot contact it. 61 * start an internal registry if requested. 62 */ 63 if (startRegistry && registry == null) { 64 int localport = (port < 0) ? Registry.REGISTRY_PORT : port; 65 registry = LocateRegistry.createRegistry(localport); 66 bind(name, remoteHost); 67 } else { 68 throw e; 69 } 70 } 71 } 72 73 @SuppressWarnings("deprecation") // Use of RMISecurityManager 74 public static void main(String[] args) { 75 String rminame = null; 76 int argc = 0; 77 78 for ( ; (argc < args.length) && (args[argc].startsWith("-")); argc++) { 79 String arg = args[argc]; 80 81 if (arg.compareTo("-nr") == 0) { 82 startRegistry = false; 83 } else if (arg.startsWith("-p")) { 84 if (arg.compareTo("-p") != 0) { 85 port = Integer.parseInt(arg.substring(2)); 86 } else { 87 argc++; 88 if (argc >= args.length) { 89 printUsage(); 90 System.exit(1); 91 } 92 port = Integer.parseInt(args[argc]); 93 } 94 } else if (arg.startsWith("-n")) { 95 if (arg.compareTo("-n") != 0) { 96 rminame = arg.substring(2); 97 } else { 98 argc++; 99 if (argc >= args.length) { 100 printUsage(); 101 System.exit(1); 102 } 103 rminame = args[argc]; 104 } 105 } else { 106 printUsage(); 107 System.exit(1); 108 } 109 } 110 111 if (argc < args.length) { 112 printUsage(); 113 System.exit(1); 114 } 115 116 if (System.getSecurityManager() == null) { 117 System.setSecurityManager(new RMISecurityManager()); 118 } 119 120 StringBuilder name = new StringBuilder(); 121 122 if (port >= 0) { 123 name.append("//:").append(port); 124 } 125 126 if (rminame == null) { 127 rminame = "JStatRemoteHost"; 128 } 129 130 name.append("/").append(rminame); 131 132 try { 133 // use 1.5.0 dynamically generated subs. 134 System.setProperty("java.rmi.server.ignoreSubClasses", "true"); 135 RemoteHostImpl remoteHost = new RemoteHostImpl(); 136 RemoteHost stub = (RemoteHost) UnicastRemoteObject.exportObject( 137 remoteHost, 0); 138 bind(name.toString(), remoteHost); 139 System.out.println("jstatd started (bound to " + name.toString() + ")"); 140 System.out.flush(); 141 } catch (MalformedURLException e) { 142 if (rminame != null) { 143 System.out.println("Bad RMI server name: " + rminame); 144 } else { 145 System.out.println("Bad RMI URL: " + name); 146 } 147 e.printStackTrace(System.out); 148 System.exit(1); 149 } catch (java.rmi.ConnectException e) { 150 // could not attach to or create a registry 151 System.out.println("Could not contact RMI registry"); 152 e.printStackTrace(System.out); 153 System.exit(1); 154 } catch (RemoteException e) { 155 System.out.println("Could not bind " + name + " to RMI Registry"); 156 e.printStackTrace(System.out); 157 System.exit(1); 158 } catch (Exception e) { 159 System.out.println("Could not create remote object"); 160 e.printStackTrace(System.out); 161 System.exit(1); 162 } 163 } 164 }