package biz.paluch.logging.gelf.log4j;
import org.apache.log4j.Level;
import org.apache.log4j.MDC;
import org.apache.log4j.spi.LoggingEvent;
import org.apache.log4j.spi.ThrowableInformation;
import biz.paluch.logging.gelf.GelfUtil;
import biz.paluch.logging.gelf.LogEvent;
import biz.paluch.logging.gelf.LogMessageField;
import biz.paluch.logging.gelf.MdcMessageField;
import biz.paluch.logging.gelf.MessageField;
/**
* @author <a href="mailto:mpaluch@paluch.biz">Mark Paluch</a>
* @since 26.09.13 15:37
*/
class Log4jLogEvent implements LogEvent {
private LoggingEvent loggingEvent;
public Log4jLogEvent(LoggingEvent loggingEvent) {
this.loggingEvent = loggingEvent;
}
@Override
public String getMessage() {
return loggingEvent.getRenderedMessage();
}
@Override
public Object[] getParameters() {
return new Object[0];
}
@Override
public Throwable getThrowable() {
ThrowableInformation ti = loggingEvent.getThrowableInformation();
if (ti != null) {
return ti.getThrowable();
}
return null;
}
@Override
public long getLogTimestamp() {
return Log4jVersionChecker.getTimeStamp(loggingEvent);
}
@Override
public String getSyslogLevel() {
return "" + levelToSyslogLevel(loggingEvent.getLevel());
}
private int levelToSyslogLevel(final Level level) {
final int syslogLevel;
switch (level.toInt()) {
case Level.FATAL_INT:
return 2;
case Level.ERROR_INT:
return 3;
case Level.WARN_INT:
return 4;
case Level.INFO_INT:
return 6;
default:
return 7;
}
}
@Override
public String getValue(MessageField field) {
if (field instanceof LogMessageField) {
return getValue((LogMessageField) field);
}
if (field instanceof MdcMessageField) {
return getValue((MdcMessageField) field);
}
throw new UnsupportedOperationException("Cannot provide value for " + field);
}
public String getValue(LogMessageField field) {
switch (field.getNamedLogField()) {
case Severity:
return loggingEvent.getLevel().toString();
case ThreadName:
return loggingEvent.getThreadName();
case SourceClassName:
return loggingEvent.getLocationInformation().getClassName();
case SourceMethodName:
return loggingEvent.getLocationInformation().getMethodName();
case SourceSimpleClassName:
return GelfUtil.getSimpleClassName(loggingEvent.getLocationInformation().getClassName());
}
throw new UnsupportedOperationException("Cannot provide value for " + field);
}
private String getValue(MdcMessageField field) {
return getMdc(field.getMdcName());
}
@Override
public String getMdc(String mdcName) {
Object value = MDC.get(mdcName);
if (value != null) {
return value.toString();
}
return null;
}
}