Reexport.java revision 16360:6f246db971c0 
1/*
2 * Copyright (c) 1999, 2016, 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.
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/* @test
25 * @bug 4120329
26 * @summary RMI registry creation is impossible if first attempt fails.
27 * @library ../../testlibrary
28 * @modules java.rmi/sun.rmi.registry
29 *          java.rmi/sun.rmi.server
30 *          java.rmi/sun.rmi.transport
31 *          java.rmi/sun.rmi.transport.tcp
32 * @build TestLibrary REGISTRY RegistryRunner
33 * @run main/othervm Reexport
34 */
35
36/*
37 * If a VM could not create an RMI registry because another registry
38 * usually in another process, was using the registry port, the next
39 * time the VM tried to create a registry (after the other registry
40 * was brought down) the attempt would fail.  The second try to create
41 * a registry would fail because the registry ObjID would still be in
42 * use when it should never have been allocated.
43 *
44 * The test creates this conflict using Runtime.exec and ensures that
45 * a registry can still be created after the conflict is resolved.
46 */
47
48import java.io.*;
49import java.rmi.*;
50import java.rmi.registry.*;
51import java.rmi.server.*;
52
53public class Reexport {
54    static public void main(String[] argv) {
55
56        Registry reg = null;
57        try {
58            System.err.println("\nregression test for 4120329\n");
59
60            // establish the registry (we hope)
61            makeRegistry();
62
63            // Get a handle to the registry
64            System.err.println("Creating duplicate registry, this should fail...");
65            reg = createReg(true);
66
67            // Kill the first registry.
68            System.err.println("Bringing down the first registry");
69            try {
70                killRegistry();
71            } catch (Exception foo) {
72            }
73
74            // start another registry now that the first is gone; this should work
75            System.err.println("Trying again to start our own " +
76                               "registry... this should work");
77
78            reg = createReg(false);
79
80            if (reg == null) {
81                TestLibrary.bomb("Could not create registry on second try");
82            }
83
84            System.err.println("Test passed");
85
86        } catch (Exception e) {
87            TestLibrary.bomb(e);
88        } finally {
89            // dont leave the registry around to affect other tests.
90            killRegistry();
91            reg = null;
92        }
93    }
94
95    static Registry createReg(boolean remoteOk) {
96        Registry reg = null;
97
98        try {
99            reg = LocateRegistry.createRegistry(port);
100            if (remoteOk) {
101                TestLibrary.bomb("Remote registry is up, an Exception is expected!");
102            }
103        } catch (Throwable e) {
104            if (remoteOk) {
105                System.err.println("EXPECTING PORT IN USE EXCEPTION:");
106                System.err.println(e.getMessage());
107                e.printStackTrace();
108            } else {
109                TestLibrary.bomb((Exception) e);
110            }
111        }
112        return reg;
113    }
114
115    public static void makeRegistry() {
116        try {
117            subreg = REGISTRY.createREGISTRY();
118            subreg.start();
119            port = subreg.getPort();
120            System.out.println("Starting registry on port " + port);
121        } catch (IOException e) {
122            // one of these is summarily dropped, can't remember which one
123            System.out.println ("Test setup failed - cannot run rmiregistry");
124            TestLibrary.bomb("Test setup failed - cannot run test", e);
125        }
126    }
127
128    private static REGISTRY subreg = null;
129    private static int port = -1;
130
131    public static void killRegistry() {
132        if (subreg != null) {
133            subreg.shutdown();
134            subreg = null;
135        }
136    }
137}
138