Java logging Filter Interface
Recently, I switched from using log4j to java logging, and I needed a way to selectively constrain logging to a specific set of classes, or methods. So I came up with the following example. Since there are a few examples on the java logging Filter interface, I am sharing this example.
Hopefully it's useful to others.
SelectiveLogFilter filter = new SelectiveLogFilter(); filter.add(MyApp.class.getName()); consoleHandler.setFilter(filter); |
| /** * A simple logging filter to allow multi per class logging * */ public class SelectiveLogFilter implements Filter { private HashSet classLogSet = new HashSet(); private HashSet methodLogSet = new HashSet(); /** * Adds a name to the set of loggable classes * * @param className canonical class name e.g. App.class.getName() */ public void add(String className) { classLogSet.add(className); } /** * Removes a name from the set loggable classes * * @param className canonical class name e.g. App.class.getName() */ public void remove(String className) { classLogSet.remove(className); } /** * Adds a method name to the set of loggable classes * * @param methodName canonical method name e.g. * App.class.getName()+"methodName" */ public void addMethod(String methodName) { methodLogSet.add(methodName); } /** * Removes a name from the set loggable classes * * @param methodName canonical method name e.g. * App.class.getName()+"methodName" */ public void removeMethod(String methodName) { methodLogSet.remove(methodName); } /** * Clears the loggable Class Set (effectively turns off logging) */ public void reset() { classLogSet.clear(); } /** * Clears the loggable Method Set */ public void resetMethodSet() { methodLogSet.clear(); } /** * {@inheritDoc} */ public boolean isLoggable(LogRecord record) { return classLogSet.contains(record.getSourceClassName()) || methodLogSet.contains(record.getSourceMethodName()); } } |
