/**
* Copyright (C) 2010-2012 Andrei Pozolotin <Andrei.Pozolotin@gmail.com>
*
* All rights reserved. Licensed under the OSI BSD License.
*
* http://www.opensource.org/licenses/bsd-license.php
*/
package com.carrotgarden.log4j.aws.sns;
import static com.carrotgarden.log4j.aws.sns.Signature.Mask.*;
import java.util.Collections;
import java.util.EnumSet;
import java.util.Set;
import org.apache.log4j.spi.LocationInfo;
import org.apache.log4j.spi.LoggingEvent;
import org.codehaus.jackson.annotate.JsonProperty;
/**
* event signature mask and maker
*/
public class Signature {
/**
* event signature can include the following parts
*/
public static enum Mask {
/** {@link LoggingEvent#getLevel()} */
LEVEL, //
/** {@link LoggingEvent#getLoggerName()} */
LOGGER_NAME, //
/** {@link LoggingEvent#getThreadName()} */
THREAD_NAME, //
/** {@link LocationInfo#getFileName()} */
FILE_NAME, //
/** {@link LocationInfo#getClassName()} */
CLASS_NAME, //
/** {@link LocationInfo#getMethodName()} */
METHOD_NAME, //
/** {@link LocationInfo#getLineNumber()} */
LINE_NUMBER, //
/** {@link LoggingEvent#getThrowableStrRep()} */
STACK_TRACE, //
;
public static Set<Mask> DEFAULT = Collections.unmodifiableSet(//
EnumSet.of(LOGGER_NAME, LINE_NUMBER));
}
public static final Signature DEFAULT = new Signature(Mask.DEFAULT);
@JsonProperty
public final Set<Mask> mask;
public Signature(final Set<Mask> mask) {
this.mask = mask;
}
/**
* make event signature based on event set mask
*/
public String make(final LoggingEvent event) {
final StringBuilder text = new StringBuilder(128);
if (mask.contains(LEVEL)) {
text.append("/");
text.append(event.getLevel().toString());
}
if (mask.contains(LOGGER_NAME)) {
text.append("/");
text.append(event.getLoggerName());
}
if (mask.contains(THREAD_NAME)) {
text.append("/");
text.append(event.getThreadName());
}
if (mask.contains(FILE_NAME)) {
final LocationInfo location = event.getLocationInformation();
text.append("/");
text.append(location.getFileName());
}
if (mask.contains(CLASS_NAME)) {
final LocationInfo location = event.getLocationInformation();
text.append("/");
text.append(location.getClassName());
}
if (mask.contains(METHOD_NAME)) {
final LocationInfo location = event.getLocationInformation();
text.append("/");
text.append(location.getMethodName());
}
if (mask.contains(LINE_NUMBER)) {
final LocationInfo location = event.getLocationInformation();
text.append("/");
text.append(location.getLineNumber());
}
if (mask.contains(STACK_TRACE)) {
final String[] stackArray = event.getThrowableStrRep();
if (stackArray != null) {
for (final String entry : stackArray) {
text.append("/");
text.append(entry);
}
}
}
final String value = text.toString();
// LogLog.error("value=" + value);
return value;
}
}