1 /*
2 Copyright (c) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
3
4 This file is part of GNU Classpath.
5
6 GNU Classpath is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10
11 GNU Classpath is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GNU Classpath; see the file COPYING. If not, write to the
18 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 02111-1307 USA.
20
21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library. Thus, the terms and
23 conditions of the GNU General Public License cover the whole
24 combination.
25
26 As a special exception, the copyright holders of this library give you
27 permission to link this library with independent modules to produce an
28 executable, regardless of the license terms of these independent
29 modules, and to copy and distribute the resulting executable under
30 terms of your choice, provided that you also meet, for each linked
31 independent module, the terms and conditions of the license of that
32 module. An independent module is a module which is not derived from
33 or based on this library. If you modify this library, you may extend
34 this exception to your version of the library, but you are not
35 obligated to do so. If you do not wish to do so, delete this
36 exception statement from your version. */
37
38 package java.rmi;
39
40 import java.net.MalformedURLException;
41 import java.net.URL;
42 import java.rmi.registry.Registry;
43 import java.rmi.registry.LocateRegistry;
44
45 public final class Naming {
46
47 /** <pre>
48 * Looks for the remote object that is associated with the named service.
49 * Name and location is given in form of a URL without a scheme:
50 *
51 * //host:port/service-name
52 *
53 * The port is optional.
54 * </pre>
55 * @param name the service name and location
56 * @return Remote-object that implements the named service
57 * @throws NotBoundException if no object implements the service
58 * @throws MalformedURLException
59 * @throws RemoteException
60 */
lookup(String name)61 public static Remote lookup(String name) throws NotBoundException, MalformedURLException, RemoteException {
62 // hack to accept "rmi://host:port/service" strings
63 if(name.startsWith("rmi:")){ name = name.substring(4); }
64 URL u = new URL("http:" + name);
65 String filename = u.getFile();
66
67 // If the filename begins with a slash we must cut it for
68 // name resolution.
69 if (filename.charAt(0) == '/')
70 return (getRegistry(u).lookup(filename.substring(1)));
71 else
72 return (getRegistry(u).lookup(filename));
73 }
74
75 /**
76 * Try to bind the given object to the given service name.
77 * @param name
78 * @param obj
79 * @throws AlreadyBoundException
80 * @throws MalformedURLException
81 * @throws RemoteException
82 */
bind(String name, Remote obj)83 public static void bind(String name, Remote obj) throws AlreadyBoundException, MalformedURLException, RemoteException {
84 URL u = new URL("http:" + name);
85 String filename = u.getFile();
86 // If the filename begins with a slash we must cut it for
87 // name resolution.
88 if (filename.charAt(0) == '/')
89 getRegistry(u).bind(filename.substring(1), obj);
90 else
91 getRegistry(u).bind(filename, obj);
92 }
93
94 /**
95 * Remove a binding for a given service name.
96 * @param name
97 * @throws RemoteException
98 * @throws NotBoundException
99 * @throws MalformedURLException
100 */
unbind(String name)101 public static void unbind(String name) throws RemoteException, NotBoundException, MalformedURLException {
102 URL u = new URL("http:" + name);
103 String filename = u.getFile();
104 // If the filename begins with a slash we must cut it for
105 // name resolution.
106 if (filename.charAt(0) == '/')
107 getRegistry(u).unbind(filename.substring(1));
108 else
109 getRegistry(u).unbind(filename);
110 }
111
112 /**
113 * Forces the binding between the given Remote-object and the given service name, even
114 * if there was already an object bound to this name.
115 * @param name
116 * @param obj
117 * @throws RemoteException
118 * @throws MalformedURLException
119 */
rebind(String name, Remote obj)120 public static void rebind(String name, Remote obj) throws RemoteException, MalformedURLException {
121 URL u = new URL("http:" + name);
122 String filename = u.getFile();
123 // If the filename begins with a slash we must cut it for
124 // name resolution.
125 if (filename.charAt(0) == '/')
126 getRegistry(u).rebind(filename.substring(1), obj);
127 else
128 getRegistry(u).rebind(filename, obj);
129 }
130
131 /**
132 * Lists all services at the named registry.
133 * @param name url that specifies the registry
134 * @return list of services at the name registry
135 * @throws RemoteException
136 * @throws MalformedURLException
137 */
list(String name)138 public static String[] list(String name) throws RemoteException, MalformedURLException {
139 return (getRegistry(new URL("http:" + name)).list());
140 }
141
getRegistry(URL u)142 private static Registry getRegistry(URL u) throws RemoteException {
143 if (u.getPort() == -1) {
144 return (LocateRegistry.getRegistry(u.getHost()));
145 }
146 else {
147 return (LocateRegistry.getRegistry(u.getHost(), u.getPort()));
148 }
149 }
150
151 }
152