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comparison agent/src/share/classes/sun/jvm/hotspot/RMIHelper.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2004 Sun Microsystems, Inc. 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 package sun.jvm.hotspot;
26
27 import java.io.*;
28 import java.net.*;
29 import java.rmi.*;
30 import java.rmi.registry.*;
31 import sun.jvm.hotspot.debugger.DebuggerException;
32
33 public class RMIHelper {
34 private static final boolean startRegistry;
35 private static int port;
36 private static String serverNamePrefix;
37
38 static {
39 String tmp = System.getProperty("sun.jvm.hotspot.rmi.startRegistry");
40 if (tmp != null && tmp.equals("false")) {
41 startRegistry = false;
42 } else {
43 // by default, we attempt to start rmiregistry
44 startRegistry = true;
45 }
46
47 port = Registry.REGISTRY_PORT;
48 tmp = System.getProperty("sun.jvm.hotspot.rmi.port");
49 if (tmp != null) {
50 try {
51 port = Integer.parseInt(tmp);
52 } catch (NumberFormatException nfe) {
53 System.err.println("invalid port supplied, assuming default");
54 }
55 }
56
57 tmp = System.getProperty("sun.jvm.hotspot.rmi.serverNamePrefix");
58 serverNamePrefix = (tmp != null)? serverNamePrefix : "SARemoteDebugger";
59 }
60
61 public static void rebind(String uniqueID, Remote object) throws DebuggerException {
62 String name = getName(uniqueID);
63 try {
64 Naming.rebind(name, object);
65 } catch (RemoteException re) {
66 if (startRegistry) {
67 // may be the user didn't start rmiregistry, try to start it
68 try {
69 LocateRegistry.createRegistry(port);
70 Naming.rebind(name, object);
71 } catch (Exception exp) {
72 throw new DebuggerException(exp);
73 }
74 } else {
75 throw new DebuggerException(re);
76 }
77 } catch (Exception exp) {
78 throw new DebuggerException(exp);
79 }
80 }
81
82 public static void unbind(String uniqueID) throws DebuggerException {
83 String name = getName(uniqueID);
84 try {
85 Naming.unbind(name);
86 } catch (Exception exp) {
87 throw new DebuggerException(exp);
88 }
89 }
90
91 public static Remote lookup(String debugServerID) throws DebuggerException {
92 // debugServerID follows the pattern [unique_id@]host[:port]
93 // we have to transform this as //host[:port]/<serverNamePrefix>['_'<unique_id>]
94
95 int index = debugServerID.indexOf('@');
96 StringBuffer nameBuf = new StringBuffer("//");
97 String uniqueID = null;
98 if (index != -1) {
99 nameBuf.append(debugServerID.substring(index + 1));
100 uniqueID = debugServerID.substring(0, index);
101 } else {
102 nameBuf.append(debugServerID);
103 }
104
105 nameBuf.append('/');
106 nameBuf.append(serverNamePrefix);
107 if (uniqueID != null) {
108 nameBuf.append('_');
109 nameBuf.append(uniqueID);
110 }
111
112 try {
113 return Naming.lookup(nameBuf.toString());
114 } catch (Exception exp) {
115 throw new DebuggerException(exp);
116 }
117 }
118
119 private static String getName(String uniqueID) {
120 String name = null;
121 if (uniqueID != null) {
122 name = serverNamePrefix + "_" + uniqueID;
123 } else {
124 name = serverNamePrefix;
125 }
126 if (port != Registry.REGISTRY_PORT) {
127 name = "//localhost:" + port + "/" + name;
128 }
129 return name;
130 }
131 }