1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache license, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. 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 package org.apache.log4j.or;
18
19 import org.apache.log4j.Layout;
20
21 /**
22 */
23 public class ThreadGroupRenderer implements ObjectRenderer {
24
25 public
26 String doRender(Object obj) {
27 if(obj instanceof ThreadGroup) {
28 StringBuilder sb = new StringBuilder();
29 ThreadGroup threadGroup = (ThreadGroup) obj;
30 sb.append("java.lang.ThreadGroup[name=");
31 sb.append(threadGroup.getName());
32 sb.append(", maxpri=");
33 sb.append(threadGroup.getMaxPriority());
34 sb.append("]");
35 Thread[] threads = new Thread[threadGroup.activeCount()];
36 threadGroup.enumerate(threads);
37 for (Thread thread : threads) {
38 sb.append(Layout.LINE_SEP);
39 sb.append(" Thread=[");
40 sb.append(thread.getName());
41 sb.append(",");
42 sb.append(thread.getPriority());
43 sb.append(",");
44 sb.append(thread.isDaemon());
45 sb.append("]");
46 }
47 return sb.toString();
48 } else {
49 try {
50 // this is the best we can do
51 return obj.toString();
52 } catch(Exception ex) {
53 return ex.toString();
54 }
55 }
56 }
57 }