/**
* LOGBack: the reliable, fast and flexible logging library for Java.
*
* Copyright (C) 1999-2006, QOS.ch
*
* This library is free software, you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation.
*/
package ch.qos.logback.classic.pattern;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import ch.qos.logback.classic.spi.CallerData;
import ch.qos.logback.classic.spi.LoggingEvent;
import ch.qos.logback.core.Context;
import ch.qos.logback.core.CoreConstants;
import ch.qos.logback.core.boolex.EvaluationException;
import ch.qos.logback.core.boolex.EventEvaluator;
import ch.qos.logback.core.status.ErrorStatus;
/**
* This converter outputs caller data depending on depth and marker data.
*
* @author Ceki Gulcu
*/
public class CallerDataConverter extends ClassicConverter {
int depth = 5;
List<EventEvaluator> evaluatorList = null;
final int MAX_ERROR_COUNT = 4;
int errorCount = 0;
public void start() {
String depthStr = getFirstOption();
if (depthStr == null) {
return;
}
try {
depth = Integer.parseInt(depthStr);
} catch (NumberFormatException nfe) {
addError("");
}
final List optionList = getOptionList();
if (optionList != null && optionList.size() > 1) {
final int optionListSize = optionList.size();
for (int i = 1; i < optionListSize; i++) {
String evaluatorStr = (String) optionList.get(i);
Context context = getContext();
if (context != null) {
Map evaluatorMap = (Map) context.getObject(CoreConstants.EVALUATOR_MAP);
EventEvaluator ee = (EventEvaluator) evaluatorMap.get(evaluatorStr);
if (ee != null) {
addEvaluator(ee);
}
}
}
}
}
private void addEvaluator(EventEvaluator ee) {
if (evaluatorList == null) {
evaluatorList = new ArrayList<EventEvaluator>();
}
evaluatorList.add(ee);
}
public String convert(LoggingEvent le) {
StringBuffer buf = new StringBuffer();
if (evaluatorList != null) {
boolean printCallerData = false;
for (int i = 0; i < evaluatorList.size(); i++) {
EventEvaluator ee = (EventEvaluator) evaluatorList.get(i);
try {
if (ee.evaluate(le)) {
printCallerData = true;
break;
}
} catch (EvaluationException eex) {
errorCount++;
if (errorCount < MAX_ERROR_COUNT) {
addError("Exception thrown for evaluator named [" + ee.getName()
+ "]", eex);
} else if (errorCount == MAX_ERROR_COUNT) {
ErrorStatus errorStatus = new ErrorStatus(
"Exception thrown for evaluator named [" + ee.getName() + "].",
this, eex);
errorStatus.add(new ErrorStatus("This was the last warning about this evaluator's errors." +
"We don't want the StatusManager to get flooded.", this));
addStatus(errorStatus);
}
}
}
if (!printCallerData) {
return CoreConstants.EMPTY_STRING;
}
}
CallerData[] cda = le.getCallerData();
if (cda != null && cda.length > 0) {
int limit = depth < cda.length ? depth : cda.length;
for (int i = 0; i < limit; i++) {
buf.append("Caller+");
buf.append(i);
buf.append("\t at ");
buf.append(cda[i]);
buf.append(CoreConstants.LINE_SEPARATOR);
}
return buf.toString();
} else {
return CallerData.CALLER_DATA_NA;
}
}
}