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 @Override
26 public
27 String doRender(Object obj) {
28 if(obj instanceof ThreadGroup) {
29 StringBuilder sb = new StringBuilder();
30 ThreadGroup threadGroup = (ThreadGroup) obj;
31 sb.append("java.lang.ThreadGroup[name=");
32 sb.append(threadGroup.getName());
33 sb.append(", maxpri=");
34 sb.append(threadGroup.getMaxPriority());
35 sb.append("]");
36 Thread[] threads = new Thread[threadGroup.activeCount()];
37 threadGroup.enumerate(threads);
38 for (Thread thread : threads) {
39 sb.append(Layout.LINE_SEP);
40 sb.append(" Thread=[");
41 sb.append(thread.getName());
42 sb.append(",");
43 sb.append(thread.getPriority());
44 sb.append(",");
45 sb.append(thread.isDaemon());
46 sb.append("]");
47 }
48 return sb.toString();
49 }
50 try {
51 // this is the best we can do
52 return obj.toString();
53 } catch(Exception ex) {
54 return ex.toString();
55 }
56 }
57 }