Source code: org/activemq/util/SystemProperties.java
1 /**
2 *
3 * Copyright 2004 Protique Ltd
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 **/
18 package org.activemq.util;
19
20 import java.util.Properties;
21 import org.apache.commons.logging.Log;
22 import org.apache.commons.logging.LogFactory;
23
24 /**
25 * Helper class for accessing System properties
26 *
27 * @version $Revision: 1.1.1.1 $
28 */
29 public class SystemProperties {
30 private static final Log log = LogFactory.getLog(SystemProperties.class);
31 private static final boolean canAccessSystemProperties;
32 private static final Properties defaultProperties = new Properties();
33
34
35 static {
36 SecurityManager securityManager = System.getSecurityManager();
37 boolean haveAccess = false;
38 if ( securityManager != null ){
39 try{
40 securityManager.checkPropertiesAccess();
41 haveAccess = true;
42 }catch(Throwable e){
43 haveAccess = false;
44 log.warn("Do not have access to System properties",e);
45 }
46 }
47 canAccessSystemProperties = haveAccess;
48 }
49
50 /**
51 * @return System properties
52 */
53 public static Properties getSystemProperties(){
54 return canAccessSystemProperties ? System.getProperties() : defaultProperties;
55 }
56
57 /**
58 * @return the default user name
59 */
60 public static String getUserName(){
61 return canAccessSystemProperties ? System.getProperty("user.name") : "defaultUser";
62 }
63 }