1 /* 2 * Copyright (c) 2004, 2017, 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]\n" + 51 " jstatd -?|-h|--help"); 52 } 53 54 static void bind(String name, RemoteHostImpl remoteHost) 55 throws RemoteException, MalformedURLException, Exception { 56 57 try { 58 Naming.rebind(name, remoteHost); 59 } catch (java.rmi.ConnectException e) { 60 /* 61 * either the registry is not running or we cannot contact it. 62 * start an internal registry if requested. 63 */ 64 if (startRegistry && registry == null) { 65 int localport = (port < 0) ? Registry.REGISTRY_PORT : port; 66 registry = LocateRegistry.createRegistry(localport); 67 bind(name, remoteHost); 68 } else { 69 throw e; 70 } 71 } 72 } 73 74 @SuppressWarnings("deprecation") // Use of RMISecurityManager 75 public static void main(String[] args) { 76 String rminame = null; 77 int argc = 0; 78 79 for ( ; (argc < args.length) && (args[argc].startsWith("-")); argc++) { 80 String arg = args[argc]; 81 82 if (arg.compareTo("-?") == 0 || 83 arg.compareTo("-h") == 0 || 84 arg.compareTo("--help") == 0) { 85 printUsage(); 86 System.exit(0); 87 } else if (arg.compareTo("-nr") == 0) { 88 startRegistry = false; 89 } else if (arg.startsWith("-p")) { 90 if (arg.compareTo("-p") != 0) { 91 port = Integer.parseInt(arg.substring(2)); 92 } else { 93 argc++; 94 if (argc >= args.length) { 95 printUsage(); 96 System.exit(1); 97 } 98 port = Integer.parseInt(args[argc]); 99 } 100 } else if (arg.startsWith("-n")) { 101 if (arg.compareTo("-n") != 0) { 102 rminame = arg.substring(2); 103 } else { 104 argc++; 105 if (argc >= args.length) { 106 printUsage(); 107 System.exit(1); 108 } 109 rminame = args[argc]; 110 } 111 } else { 112 printUsage(); 113 System.exit(1); 114 } 115 } 116 117 if (argc < args.length) { 118 printUsage(); 119 System.exit(1); 120 } 121 122 if (System.getSecurityManager() == null) { 123 System.setSecurityManager(new RMISecurityManager()); 124 } 125 126 StringBuilder name = new StringBuilder(); 127 128 if (port >= 0) { 129 name.append("//:").append(port); 130 } 131 132 if (rminame == null) { 133 rminame = "JStatRemoteHost"; 134 } 135 136 name.append("/").append(rminame); 137 138 try { 139 // use 1.5.0 dynamically generated subs. 140 System.setProperty("java.rmi.server.ignoreSubClasses", "true"); 141 RemoteHostImpl remoteHost = new RemoteHostImpl(); 142 RemoteHost stub = (RemoteHost) UnicastRemoteObject.exportObject( 143 remoteHost, 0); 144 bind(name.toString(), remoteHost); 145 System.out.println("jstatd started (bound to " + name.toString() + ")"); 146 System.out.flush(); 147 } catch (MalformedURLException e) { 148 if (rminame != null) { 149 System.out.println("Bad RMI server name: " + rminame); 150 } else { 151 System.out.println("Bad RMI URL: " + name); 152 } 153 e.printStackTrace(System.out); 154 System.exit(1); 155 } catch (java.rmi.ConnectException e) { 156 // could not attach to or create a registry 157 System.out.println("Could not contact RMI registry"); 158 e.printStackTrace(System.out); 159 System.exit(1); 160 } catch (RemoteException e) { 161 System.out.println("Could not bind " + name + " to RMI Registry"); 162 e.printStackTrace(System.out); 163 System.exit(1); 164 } catch (Exception e) { 165 System.out.println("Could not create remote object"); 166 e.printStackTrace(System.out); 167 System.exit(1); 168 } 169 } 170 }