examples: public class: MyPatternLayout

examples
public class: MyPatternLayout [javadoc | source]

java.lang.Object
   org.apache.log4j.Layout
      org.apache.log4j.PatternLayout
         examples.MyPatternLayout

All Implemented Interfaces:
OptionHandler

Example showing how to extend PatternLayout to recognize additional conversion characters.

In this case MyPatternLayout recognizes %# conversion pattern. It outputs the value of an internal counter which is also incremented at each call.

See source code for more details.

Also see:

MyPatternParser

org.apache.log4j.PatternLayout

author: Anders - Kristensen

Fields inherited from org.apache.log4j.PatternLayout:
DEFAULT_CONVERSION_PATTERN, TTCC_CONVERSION_PATTERN, BUF_SIZE, MAX_CAPACITY

Fields inherited from org.apache.log4j.Layout:
LINE_SEP, LINE_SEP_LEN

Constructor:
public MyPatternLayout() { this(DEFAULT_CONVERSION_PATTERN); }
public MyPatternLayout(String pattern) { super(pattern); }

Method from examples.MyPatternLayout Summary:
createPatternParser, main

Methods from org.apache.log4j.PatternLayout:
activateOptions, createPatternParser, format, getConversionPattern, ignoresThrowable, setConversionPattern

Methods from org.apache.log4j.Layout:
activateOptions, format, getContentType, getFooter, getHeader, ignoresThrowable

Methods from java.lang.Object:
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from examples.MyPatternLayout Detail:
public PatternParser createPatternParser(String pattern) { return new MyPatternParser( pattern == null ? DEFAULT_CONVERSION_PATTERN : pattern); }
public static void main(String[] args) { Layout layout = new MyPatternLayout("[counter=%.10#] - %m%n"); Logger logger = Logger.getLogger("some.cat"); logger.addAppender(new ConsoleAppender(layout, ConsoleAppender.SYSTEM_OUT)); logger.debug("Hello, log"); logger.info("Hello again..."); }

Method from examples.MyPatternLayout Detail:

 public PatternParser createPatternParser(String pattern) {
    return new MyPatternParser(
      pattern == null ? DEFAULT_CONVERSION_PATTERN : pattern);
}

 public static  void main(String[] args) {
    Layout layout = new MyPatternLayout("[counter=%.10#] - %m%n");
    Logger logger = Logger.getLogger("some.cat");
    logger.addAppender(new ConsoleAppender(layout, ConsoleAppender.SYSTEM_OUT));
    logger.debug("Hello, log");
    logger.info("Hello again...");
}