1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/*
* Copyright (c) 2004, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
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
*/
public class Jstatd {
private static Registry registry;
private static int port = -1;
private static boolean startRegistry = true;
private static void printUsage() {
System.err.println("usage: jstatd [-nr] [-p port] [-n rminame]\n" +
" jstatd -?|-h|--help");
}
static void bind(String name, RemoteHostImpl 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 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("-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");
RemoteHostImpl remoteHost = new RemoteHostImpl();
RemoteHost stub = (RemoteHost) UnicastRemoteObject.exportObject(
remoteHost, 0);
bind(name.toString(), remoteHost);
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);
}
}
}
|
