1 /*
   2  * Copyright (c) 2004, 2015, 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     4990512
  27  * @summary Basic Test for RuntimeMXBean.getSystemProperties().
  28  * @author  Mandy Chung
  29  * @modules java.management
  30  */
  31 
  32 import java.lang.management.ManagementFactory;
  33 import java.lang.management.RuntimeMXBean;
  34 import java.util.*;
  35 
  36 public class GetSystemProperties {
  37     private static final String KEY1   = "test.property.key1";
  38     private static final String VALUE1 = "test.property.value1";
  39     private static final String KEY2   = "test.property.key2";
  40     private static final String VALUE2 = "test.property.value2";
  41 
  42     // system properties to be omitted
  43     private static final String KEY3   = "test.property.key3";
  44     private static final Long VALUE3   = new Long(0);;
  45 
  46     private static final Object KEY4   = new Object();
  47     private static final String VALUE4 = "test.property.value4";
  48 
  49     public static void main(String[] argv) throws Exception {
  50         // Save a copy of the original system properties
  51         Properties props = System.getProperties();
  52 
  53         try {
  54             // replace the system Properties object for any modification
  55             // in case jtreg caches a copy
  56             System.setProperties(new Properties(props));
  57             runTest();
  58         } finally {
  59             // restore original system properties
  60             System.setProperties(props);
  61         }
  62     }
  63 
  64     private static void runTest() throws Exception {
  65         RuntimeMXBean mbean = ManagementFactory.getRuntimeMXBean();
  66 
  67         // Print all system properties
  68         Map<String,String> props = mbean.getSystemProperties();
  69         printProperties(props);
  70 
  71         // Add new system properties
  72         System.setProperty(KEY1, VALUE1);
  73         System.setProperty(KEY2, VALUE2);
  74 
  75         Map<String,String> props1 = mbean.getSystemProperties();
  76         String value1 = props1.get(KEY1);
  77         if (value1 == null || !value1.equals(VALUE1)) {
  78             throw new RuntimeException(KEY1 + " property found" +
  79                  " with value = " + value1 +
  80                  " but expected to be " + VALUE1);
  81         }
  82 
  83         String value2 = props1.get(KEY2);
  84         if (value2 == null || !value2.equals(VALUE2)) {
  85             throw new RuntimeException(KEY2 + " property found" +
  86                  " with value = " + value2 +
  87                  " but expected to be " + VALUE2);
  88         }
  89 
  90         String value3 = props1.get(KEY3);
  91         if (value3 != null) {
  92             throw new RuntimeException(KEY3 + " property found" +
  93                  " but should not exist" );
  94         }
  95 
  96         // Add new system properties but are not Strings
  97         Properties sp = System.getProperties();
  98         sp.put(KEY3, VALUE3);
  99         sp.put(KEY4, VALUE4);
 100 
 101         Map<String,String> props2 = mbean.getSystemProperties();
 102         // expect the system properties returned should be
 103         // same as the one before adding KEY3 and KEY4
 104         if (!props1.equals(props2)) {
 105             throw new RuntimeException("Two copies of system properties " +
 106                 "are expected to be equal");
 107         }
 108 
 109         System.out.println("Test passed.");
 110     }
 111 
 112     private static void printProperties(Map<String,String> props) {
 113         Set<Map.Entry<String,String>> set = props.entrySet();
 114         for (Map.Entry<String,String> p : set) {
 115             System.out.println(p.getKey() + ": " + p.getValue());
 116         }
 117     }
 118 }