package org.apache.log4j.joran.action;
import org.apache.joran.ExecutionContext;
import org.apache.joran.action.Action;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.apache.log4j.helpers.Loader;
import org.apache.log4j.helpers.OptionConverter;
import org.apache.log4j.spi.ErrorItem;
import org.xml.sax.Attributes;
import java.lang.reflect.Method;
public class LevelAction extends Action {
static final Logger logger = Logger.getLogger(LevelAction.class);
static final String VALUE_ATTR = "value";
static final String CLASS_ATTR = "class";
static final String INHERITED = "INHERITED";
static final String NULL = "NULL";
static final String EMPTY_STR = "";
static final Class[] ONE_STRING_PARAM = new Class[] { String.class };
boolean inError = false;
public void begin(ExecutionContext ec, String name, Attributes attributes) {
Object o = ec.peekObject();
if (!(o instanceof Logger)) {
logger.warn("Could not find a logger at the top of execution stack.");
inError = true;
ec.addError(
new ErrorItem(
"For element <level>, could not find a logger at the top of execution stack."));
return;
}
Logger l = (Logger) o;
String loggerName = l.getName();
String levelStr = attributes.getValue(VALUE_ATTR);
logger.debug(
"Encapsulating logger name is [" + loggerName + "], levelvalue is ["
+ levelStr + "].");
if (
INHERITED.equalsIgnoreCase(levelStr) || NULL.equalsIgnoreCase(levelStr)) {
l.setLevel(null);
} else {
String className = attributes.getValue(CLASS_ATTR);
if ((className == null) || EMPTY_STR.equals(className)) {
l.setLevel(OptionConverter.toLevel(levelStr, Level.DEBUG));
} else {
logger.debug("Desired Level sub-class: [" + className + ']');
try {
Class clazz = Loader.loadClass(className);
Method toLevelMethod = clazz.getMethod("toLevel", ONE_STRING_PARAM);
Level pri =
(Level) toLevelMethod.invoke(null, new Object[] { levelStr });
l.setLevel(pri);
} catch (Exception oops) {
logger.error(
"Could not create level [" + levelStr
+ "]. Reported error follows.", oops);
return;
}
}
}
logger.debug(loggerName + " level set to " + l.getLevel());
}
public void finish(ExecutionContext ec) {
}
public void end(ExecutionContext ec, String e) {
}
}