1 /*
2 * Copyright (c) 2004, 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 /*
25 * @test
26 * @bug 5058327 8074368
27 * @summary Tests the correct behaviour of getThreadInfo(long[]) for non-existent
28 * thread IDs and the empty thread id array.
29 *
30 * @author Mandy Chung
31 * @author Jaroslav Bachorik
32 *
33 * @modules jdk.management
34 * @build ThreadInfoArray
35 * @run main ThreadInfoArray
36 */
37
38 import java.lang.management.*;
39 import javax.management.*;
40 import static java.lang.management.ManagementFactory.*;
41
42 public class ThreadInfoArray {
43 public static void main(String[] argv) throws Exception {
44 MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
45 ObjectName on = new ObjectName(THREAD_MXBEAN_NAME);
46
47 ThreadMXBean mbean = ManagementFactory.getThreadMXBean();
48 ThreadMXBean proxy = newPlatformMXBeanProxy(mbs,
49 on.toString(),
50 ThreadMXBean.class);
51
52 checkNullElement(mbean, proxy, mbs, on);
53 checkEmptyArray(mbean, proxy, mbs, on);
54 System.out.println("Test passed");
55 }
56
57 private static void checkNullElement(ThreadMXBean mbean, ThreadMXBean proxy,
58 MBeanServer mbs, ObjectName on)
59 throws Exception {
60 System.out.println("--- Check null element");
61 // ID for a new thread
62 long [] ids = {new Thread().getId()};
63 // direct call
64 ThreadInfo[] tinfos = mbean.getThreadInfo(ids);
65
66 if (tinfos[0] != null) {
67 throw new RuntimeException("TEST FAILED: " +
68 "Expected to have a null element");
69 }
70
71 // call getThreadInfo through MBeanServer
72 Object[] params = {ids};
73 String[] sigs = {"[J"};
74 Object[] result = (Object[]) mbs.invoke(on, "getThreadInfo", params, sigs);
75
76 if (result[0] != null) {
77 throw new RuntimeException("TEST FAILED: " +
78 "Expected to have a null element via MBeanServer");
79 }
80
81 // call getThreadInfo through proxy
82 tinfos = proxy.getThreadInfo(ids);
83 if (tinfos[0] != null) {
84 throw new RuntimeException("TEST FAILED: " +
85 "Expected to have a null element");
86 }
87 System.out.println("--- PASSED");
88 }
89
90 private static void checkEmptyArray(ThreadMXBean mbean, ThreadMXBean proxy,
91 MBeanServer mbs, ObjectName on)
92 throws Exception {
93 System.out.println("--- Check empty TID array");
94
95 long[] ids = new long[0];
96 // direct call
97 assertEmptyArray(mbean.getThreadInfo(ids), "Expected empty ThreadInfo array");
98 assertEmptyArray(mbean.getThreadInfo(ids, 1), "Expected empty ThreadInfo array");
99 assertEmptyArray(mbean.getThreadInfo(ids, true, true), "Expected empty ThreadInfo array");
100
101 // call getThreadInfo through MBeanServer
102 assertEmptyArray(
103 (Object[]) mbs.invoke(
104 on, "getThreadInfo", new Object[]{ids}, new String[]{"[J"}
105 ),
106 "Expected empty ThreadInfo array via MBeanServer"
107 );
108 assertEmptyArray(
109 (Object[]) mbs.invoke(
110 on, "getThreadInfo", new Object[]{ids, 1},
111 new String[]{"[J", "int"}
112 ),
113 "Expected empty ThreadInfo array via MBeanServer"
114 );
115 assertEmptyArray(
116 (Object[]) mbs.invoke(
117 on, "getThreadInfo", new Object[]{ids, true, true},
118 new String[]{"[J", "boolean", "boolean"}
119 ),
120 "Expected empty ThreadInfo array via MBeanServer"
121 );
122
123 // call getThreadInfo through proxy
124 assertEmptyArray(proxy.getThreadInfo(ids), "Expected empty ThreadInfo array");
125 assertEmptyArray(proxy.getThreadInfo(ids, 1), "Expected empty ThreadInfo array");
126 assertEmptyArray(proxy.getThreadInfo(ids, true, true), "Expected empty ThreadInfo array");
127 System.out.println("--- PASSED");
128 }
129
130 private static void assertEmptyArray(Object[] arr, String message) throws Exception {
131 if (arr.length > 0) {
132 throw new RuntimeException("TEST FAILED: " + message);
133 }
134 }
135 }