jdk/test/java/lang/management/ManagementFactory/GetObjectName.java
changeset 10359 2eff81585f6b
child 30376 2ccf2cf7ea48
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/lang/management/ManagementFactory/GetObjectName.java	Tue Aug 23 10:35:50 2011 -0700
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2011, 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.
+ *
+ * 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.
+ */
+
+/* @test
+ * @bug 7068328
+ * @summary Test if getObjectName handles properly when called by
+ *          multiple threads simultaneously. Run in othervm mode to
+ *          make sure the object name is not initialized to begin with.
+ * @run main/othervm GetObjectName
+ */
+
+import java.lang.management.BufferPoolMXBean;
+import java.lang.management.ManagementFactory;
+import java.lang.management.PlatformLoggingMXBean;
+import java.lang.management.PlatformManagedObject;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.TimeUnit;
+
+public class GetObjectName {
+    private static boolean failed = false;
+    public static void main(String[] args) throws Exception {
+        int tasks = 10000;
+        ExecutorService executor = Executors.newFixedThreadPool(10);
+        submitTasks(executor, tasks);
+        executor.shutdown();
+        executor.awaitTermination(10, TimeUnit.SECONDS);
+        if (!failed) {
+            System.out.println("Test passed.");
+        }
+    }
+
+    static void submitTasks(ExecutorService executor, int count) {
+        for (int i=0; i < count && !failed; i++) {
+            executor.execute(new Runnable() {
+                @Override
+                public void run() {
+                    List<PlatformManagedObject> mbeans = new ArrayList<>();
+                    mbeans.add(ManagementFactory.getPlatformMXBean(PlatformLoggingMXBean.class));
+                    mbeans.addAll(ManagementFactory.getPlatformMXBeans(BufferPoolMXBean.class));
+                    for (PlatformManagedObject pmo : mbeans) {
+                        // Name should not be null
+                        if (pmo.getObjectName() == null) {
+                            failed = true;
+                            throw new RuntimeException("TEST FAILED: getObjectName() returns null");
+                        }
+                    }
+                }
+            });
+        }
+    }
+}