[logback-user] Custom TextAreaAppender

[ceki]

Hi Maurizio,

Logback appenders are very similar to log4j appenders. One major 
difference is that they need to be started (by calling the start() 
method) to become active.

On 06.11.2012 10:55, m.lippa at ads.it wrote:
> Hi all,
> I'm switching my first java desktop application from log4j to logback,
> mainly because we neede a reliable DailyRollingFileAppender, and we were
> told the log4j implementation is not.
> So far all ok, we simply changed the Logger declaration and all worked well.
> The problem is our custom TextAreaAppender we are currently using to log
> the events to a text area in the application. The log4j implementation
> is very simple:
>
> public class TextAreaAppender extends WriterAppender {
>
>      static private JTextArea jTextArea = null;
>      public static void setTextArea(JTextArea jTextArea) {
>          TextAreaAppender.jTextArea = jTextArea;
>      }
>
>      /**
>       * Format and then append the loggingEvent to the stored JTextArea.
>       */
>      public void append(LoggingEvent loggingEvent) {
>          if (layout != null) {
> final String message = layout.format(loggingEvent);
> StringBuilder sb = new StringBuilder();
> if (loggingEvent.getThrowableInformation() != null) {
>      String[] stackTrace = loggingEvent.getThrowableStrRep();
>      for (String s : stackTrace) {
>          sb.append(s);
>          sb.append(Layout.LINE_SEP);
>      }
> }
> final String stackTrace = sb.toString();
>
> SwingUtilities.invokeLater(new Runnable() {
>      public void run() {
>          if (jTextArea != null) {
>              jTextArea.append(message);
>              if (!stackTrace.isEmpty()) {
>                  jTextArea.append(stackTrace);
>              }
>          }
>      }
> });
>          }
>      }
> }
>
> I worked a couple of day but did not manage to get a logback version of
> this appender to work. Do you have any sample code available?
>
> thanks in advance
> Maurizio


-- 
Ceki
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