Dear James,
thank you for your quick response. I will check wether it works.
As I just notice, there is a comercial GUI viewer available, basing on
log4J. I will check this, too.
Thilo
-----Original Message-----
From: James House [mailto:[EMAIL PROTECTED]]
Sent: Donnerstag, 14. Juni 2001 19:59
To: LOG4J Users Mailing List
Subject: Re: Missing classes (LogTextPanel / TextPanelAppender)
>I tried to compile the the class:
>LogTextPanelExample.java which is located under this path:
>
>C:\Java\jakarta-log4j-1.1.2\contribs\JamesHouse\
>
>I moved the java files to folders that should represent the package
>statement, but when compiling, there was a reference to the class:
>
>import org.apache.log4j.helpers.TracerPrintWriter;
>
>But this class is not included in the log4j.jar (version 1.12), neither can
>the class be found anywhere in the log4J installtion directory.
Hi,
I'm the author of the LogTextPanel / LogPanelAppender.
I posted a mail about this a few weeks back (when 1.10 was released).
This class was written for Log4j 1.0.4 that is why it does not
work... However, the new version of it included in this e-mail
(below) does work with Log4j 1.1x (I actually haven't tried
it against the last release).
Also keep in mind that this was written as a proto-type,
and it has some glitches. -- mainly with not always
correctly showing the last line, and not handling resizing
of the panel -- these can fairly easily be fixed, but I didn't
include the math/logic necessary for handling these
because after all, it was a quick proto-type.
Ceki: Maybe you want to include this new version with
the next release - so that people at least have a compilable
version...
Anyone: Perhaps someone would like to finish this the
right way??? -- I don't have the time - or at least wont
for some number of weeks.
James
===========================================
TextPanelAppender.java
===========================================
package org.apache.log4j.gui;
import java.awt.Color;
import java.awt.Image;
import java.awt.Toolkit;
import java.io.*;
import java.net.URL;
import java.util.Enumeration;
import java.util.StringTokenizer;
import java.util.Hashtable;
import java.util.ArrayList;
import javax.swing.JPanel;
import org.apache.log4j.*;
import org.apache.log4j.spi.LoggingEvent;
import org.apache.log4j.helpers.Loader;
import org.apache.log4j.helpers.QuietWriter;
import org.apache.log4j.helpers.OptionConverter;
/**
*
* @author James House, based on TextPaneAppender by Sven Reimers
*/
public class TextPanelAppender extends AppenderSkeleton {
LogTextPanel logTextPanel;
LogPublishingThread logPublisher;
final String COLOR_OPTION_FATAL = "Color.Fatal";
final String COLOR_OPTION_ERROR = "Color.Error";
final String COLOR_OPTION_WARN = "Color.Warn";
final String COLOR_OPTION_INFO = "Color.Info";
final String COLOR_OPTION_DEBUG = "Color.Debug";
final String COLOR_OPTION_BACKGROUND = "Color.Background";
final String FONT_NAME_OPTION = "Font.Name";
final String FONT_SIZE_OPTION = "Font.Size";
final String EVENT_BUFFER_SIZE_OPTION = "EventBuffer.Size";
public TextPanelAppender(Layout layout, String name) {
this.layout = layout;
this.name = name;
setLogTextPanel(new LogTextPanel());
logPublisher = new LogPublishingThread(logTextPanel, Priority.ERROR,
500);
//logPublisher = new LogPublishingThread(logTextPanel, null, 500);
}
public
void close() {
}
public void append(LoggingEvent event) {
String text = this.layout.format(event);
// Print Stacktrace
// Quick Hack maybe there is a better/faster way?
String[] stkTrace = event.getThrowableStrRep();
if(stkTrace != null) {
for(int i=0; i < stkTrace.length; i++) {
StringBuffer line = new StringBuffer();
for(int j=0; j < stkTrace[i].length(); j++) {
if(stkTrace[i].charAt(j) == '\t')
line.append(" ");
else
line.append(stkTrace[i].charAt(j));
}
text += line.toString();
}
}
else
if(!text.endsWith("\n"))
text += "\n";
logPublisher.publishEvent(event.priority, text);
}
public
JPanel getLogTextPanel() {
return logTextPanel;
}
public
String[] getOptionStrings() {
return new String[] { COLOR_OPTION_FATAL, COLOR_OPTION_ERROR,
COLOR_OPTION_WARN, COLOR_OPTION_INFO, COLOR_OPTION_DEBUG,
COLOR_OPTION_BACKGROUND, FONT_NAME_OPTION, FONT_SIZE_OPTION};
}
public
void setName(String name) {
this.name = name;
}
protected
void setLogTextPanel(LogTextPanel logTextPanel) {
this.logTextPanel = logTextPanel;
logTextPanel.setTextBackground(Color.white);
}
public
void setOption(String option, String value) {
if (option.equalsIgnoreCase(COLOR_OPTION_FATAL))
logTextPanel.setTextColor(Priority.FATAL,value);
if (option.equalsIgnoreCase(COLOR_OPTION_ERROR))
logTextPanel.setTextColor(Priority.ERROR,value);
if (option.equalsIgnoreCase(COLOR_OPTION_WARN))
logTextPanel.setTextColor(Priority.WARN,value);
if (option.equalsIgnoreCase(COLOR_OPTION_INFO))
logTextPanel.setTextColor(Priority.INFO,value);
if (option.equalsIgnoreCase(COLOR_OPTION_DEBUG))
logTextPanel.setTextColor(Priority.DEBUG,value);
if (option.equalsIgnoreCase(COLOR_OPTION_BACKGROUND))
logTextPanel.setTextBackground(value);
if (option.equalsIgnoreCase(FONT_SIZE_OPTION))
logTextPanel.setTextFontSize(Integer.parseInt(value));
if (option.equalsIgnoreCase(FONT_NAME_OPTION))
logTextPanel.setTextFontName(value);
if (option.equalsIgnoreCase(EVENT_BUFFER_SIZE_OPTION))
logTextPanel.setEventBufferSize(Integer.parseInt(value));
return;
}
public
boolean requiresLayout() {
return true;
}
class LogPublishingThread extends Thread {
LogTextPanel logTextPanel;
ArrayList evts;
Priority triggerPrio;
long pubInterval;
public LogPublishingThread(LogTextPanel logTextPanel, Priority
triggerPrio, long pubInterval) {
this.logTextPanel = logTextPanel;
this.evts = new ArrayList(1000);
this.triggerPrio = triggerPrio;
this.pubInterval = pubInterval;
//this.setPriority(Thread.NORM_PRIORITY - 1);
this.start();
}
public void run() {
while(true) {
synchronized(evts) {
try {
evts.wait(pubInterval);
}
catch(InterruptedException e) {}
logTextPanel.newEvents((EventBufferElement[])evts.toArray(new
EventBufferElement[evts.size()]));
evts.clear();
}
}
}
public void publishEvent(Priority prio, String text) {
synchronized(evts) {
evts.add(new EventBufferElement(prio, text));
if(triggerPrio != null && prio.isGreaterOrEqual(triggerPrio))
evts.notify();
}
}
}
} // TextPaneAppender
class EventBufferElement {
public String text;
public Priority prio;
public int numLines;
EventBufferElement(Priority prio, String text) {
this.prio = prio;
this.text = text;
numLines = 1;
int pos = pos = text.indexOf('\n', 0);
int len = text.length() - 1;
while( (pos > 0) && (pos < len) )
numLines++;
pos = text.indexOf('\n', pos + 1);
}
}
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