KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > apache > jetspeed > portal > portlets > admin > JavaRuntimePortlet


1 /*
2  * Copyright 2000-2001,2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16
17 package org.apache.jetspeed.portal.portlets.admin;
18
19 //Element Construction Set
20 import org.apache.ecs.html.Table;
21 import org.apache.ecs.html.TD;
22 import org.apache.ecs.html.TR;
23 import org.apache.ecs.ConcreteElement;
24
25 //Jetspeed stuff
26 import org.apache.jetspeed.portal.portlets.AbstractPortlet;
27 import org.apache.jetspeed.portal.PortletException;
28 import org.apache.jetspeed.services.logging.JetspeedLogFactoryService;
29 import org.apache.jetspeed.services.logging.JetspeedLogger;
30
31 //turbine
32 import org.apache.turbine.util.RunData;
33
34 //standard java stuff
35 import java.util.Enumeration;
36 import java.util.Properties;
37
38 /**
39 Handles enumerating Portlets that are also applications
40
41 @author <a HREF="mailto:burton@apache.org">Kevin A. Burton</a>
42 @version $Id: JavaRuntimePortlet.java,v 1.18 2004/02/23 03:26:19 jford Exp $
43 */
44 public class JavaRuntimePortlet extends AbstractPortlet
45 {
46
47     /**
48      * Static initialization of the logger for this class
49      */
50     private static final JetspeedLogger logger = JetspeedLogFactoryService.getLogger(JavaRuntimePortlet.class.getName());
51     
52     public ConcreteElement getContent( RunData rundata ) {
53
54         Table table = new Table().setWidth("100%");
55
56         try {
57             //get Runtime status
58 Runtime jvm = Runtime.getRuntime();
59         
60             table.addElement( new TR()
61                 .addElement( new TD("Free Memory (in bytes)") )
62                 .addElement( new TD( Long.toString( jvm.freeMemory() ) ) ) );
63         
64             table.addElement( new TR()
65                 .addElement( new TD("Total Memory (in bytes)") )
66                 .addElement( new TD( Long.toString( jvm.totalMemory() ) ) ) );
67
68             //get the system properties (It can throw a SecurityException)
69 Properties props = System.getProperties();
70         
71             Enumeration enum = props.propertyNames();
72             while( enum.hasMoreElements() ) {
73                 Object key = enum.nextElement();
74                 if ( ! ( key instanceof String ) ) {
75                     continue;
76                 }
77
78                 Object value = props.getProperty( key.toString() );
79                 table.addElement( new TR()
80                     .addElement( new TD( key.toString() ) )
81                     .addElement( new TD( value.toString() ) ) );
82             
83             }
84         } catch (Throwable t) {
85             logger.error("Throwable", t);
86             table.addElement( new TR()
87                 .addElement( new TD( "Error" ) )
88                 .addElement( new TD( "Could not read system properties" ) ) );
89         }
90
91         return table;
92     }
93     
94     /**
95     @author <a HREF="mailto:burton@apache.org">Kevin A. Burton</a>
96     @version $Id: JavaRuntimePortlet.java,v 1.18 2004/02/23 03:26:19 jford Exp $
97     */
98     public void init() throws PortletException {
99
100         this.setTitle("Java Runtime");
101         this.setDescription("Information about your Java Runtime");
102
103     }
104
105     public boolean getAllowEdit(RunData rundata) {
106         return false;
107     }
108
109     public boolean getAllowMaximize(RunData rundata) {
110         return false;
111     }
112     
113     
114 }
115
Popular Tags