Java Logger ohne Stack Trace ausgaben.

[Guest]

Hallo,

ist es in Java möglich die Loggerausgaben ohne Stack Trace informationen auszugeben. Ich will also nur das meine Lognachrichten ausgegeben werden, ohne

14.06.2007 12:45:29 TestLogger <init>

Gibs da ne Möglcihkeit?

Danke schonmal!

 

[SlaterB]

was sind denn 'die Loggerausgaben'?
log4j kannst du mit einer log4j.xml-Datei konfigurieren

<appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="|%d| %-5p %m%n"/>
</layout>
</appender>

 

[SlaterB]

du meinst wohl das hier:
http://www.exampledepot.com/egs/java.util.logging/pkg.html?l=rel#Formatters

hab mal ein Beispiel grob zusammengestellt,
keine Ahnung ob das für größere Anwendungen praktikabel ist

public class BasicLogging
{
    public static void main(String[] args)
    {
        // Get a logger; the logger is automatically created if
        // it doesn't already exist
        Logger logger = Logger.getLogger("com.mycompany.BasicLogging");
        logger.setUseParentHandlers(false);
        ConsoleHandler h = new ConsoleHandler();
        h.setFormatter(new MySimpleFormatter());
        logger.addHandler(h);

        new SimpleFormatter();
        // Log a few message at different severity levels
        logger.severe("my severe message");
        logger.warning("my warning message");
        logger.info("my info message");
        logger.config("my config message");
        logger.fine("my fine message");
        logger.finer("my finer message");
        logger.finest("my finest message");
    }
}


class MySimpleFormatter
    extends Formatter
{
    // Line separator string. This is the value of the line.separator
    // property at the moment that the SimpleFormatter was created.
    private String lineSeparator = (String)java.security.AccessController
          .doPrivileged(new sun.security.action.GetPropertyAction("line.separator"));

    public synchronized String format(LogRecord record)
    {
        StringBuffer sb = new StringBuffer();
        String message = formatMessage(record);
        sb.append(message);
        sb.append(lineSeparator);
        return sb.toString();
    }
}

Code von SimpleFormatter:

/**
 * Print a brief summary of the LogRecord in a human readable
 * format.  The summary will typically be 1 or 2 lines.
 *
 * @version 1.14, 12/19/03
 * @since 1.4
 */

public class SimpleFormatter extends Formatter {

    Date dat = new Date();
    private final static String format = "{0,date} {0,time}";
    private MessageFormat formatter;

    private Object args[] = new Object[1];

    // Line separator string.  This is the value of the line.separator
    // property at the moment that the SimpleFormatter was created.
    private String lineSeparator = (String) java.security.AccessController.doPrivileged(
               new sun.security.action.GetPropertyAction("line.separator"));

    /**
     * Format the given LogRecord.
     * @param record the log record to be formatted.
     * @return a formatted log record
     */
    public synchronized String format(LogRecord record) {
	StringBuffer sb = new StringBuffer();
	// Minimize memory allocations here.
	dat.setTime(record.getMillis());
	args[0] = dat;
	StringBuffer text = new StringBuffer();
	if (formatter == null) {
	    formatter = new MessageFormat(format);
	}
	formatter.format(args, text, null);
	sb.append(text);
	sb.append(" ");
	if (record.getSourceClassName() != null) {	
	    sb.append(record.getSourceClassName());
	} else {
	    sb.append(record.getLoggerName());
	}
	if (record.getSourceMethodName() != null) {	
	    sb.append(" ");
	    sb.append(record.getSourceMethodName());
	}
	sb.append(lineSeparator);
	String message = formatMessage(record);
	sb.append(record.getLevel().getLocalizedName());
	sb.append(": ");
	sb.append(message);
	sb.append(lineSeparator);
	if (record.getThrown() != null) {
	    try {
	        StringWriter sw = new StringWriter();
	        PrintWriter pw = new PrintWriter(sw);
	        record.getThrown().printStackTrace(pw);
	        pw.close();
		sb.append(sw.toString());
	    } catch (Exception ex) {
	    }
	}
	return sb.toString();
    }
}