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What this is

This file is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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The source code

 * Copyright (C) The Apache Software Foundation. All rights reserved.
 * This software is published under the terms of the Apache Software
 * License version 1.1, a copy of which has been included with this
 * distribution in the LICENSE.txt file.  */

package org.apache.log4j.or;

import org.apache.log4j.Layout;

   Render {@link ThreadGroup} objects in a format similar to the
   information output by the {@link ThreadGroup#list} method.
   @author Ceki Gülcü
   @since 1.0 */
public class ThreadGroupRenderer implements ObjectRenderer {

  ThreadGroupRenderer() {
     Render a {@link ThreadGroup} object similar to the way that the
     {@link ThreadGroup#list} method output information. 


The output of a simple program consisting of one main thread is:

     java.lang.ThreadGroup[name=main, maxpri=10]

The boolean value in thread information is the value returned by {@link Thread#isDaemon}. */ public String doRender(Object o) { if(o instanceof ThreadGroup) { StringBuffer sbuf = new StringBuffer(); ThreadGroup tg = (ThreadGroup) o; sbuf.append("java.lang.ThreadGroup[name="); sbuf.append(tg.getName()); sbuf.append(", maxpri="); sbuf.append(tg.getMaxPriority()); sbuf.append("]"); Thread[] t = new Thread[tg.activeCount()]; tg.enumerate(t); for(int i = 0; i < t.length; i++) { sbuf.append(Layout.LINE_SEP); sbuf.append(" Thread=["); sbuf.append(t[i].getName()); sbuf.append(","); sbuf.append(t[i].getPriority()); sbuf.append(","); sbuf.append(t[i].isDaemon()); sbuf.append("]"); } return sbuf.toString(); } else { // this is the best we can do return o.toString(); } } }

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