* Note that the logging levels mentioned in this class refer to those defined
- * in the
+ * in the
* org.apache.log4j.Level class.
*
*
* The TRACE level was introduced in log4j version 1.2.12. In order to avoid * crashing the host application, in the case the log4j version in use predates - * 1.2.12, the TRACE level will be mapped as DEBUG. See also SLF4J-59. + * 1.2.12, the TRACE level will be mapped as DEBUG. See also + * SLF4J-59. * * @author Ceki Gülcü */ -public final class Log4jLoggerAdapter extends LegacyAbstractLogger implements LocationAwareLogger, Serializable { +public final class Log4jLoggerAdapter extends LegacyAbstractLogger + implements LocationAwareLogger, LoggingEventAware, Serializable { - private static final long serialVersionUID = 6182834493563598289L; + private static final long serialVersionUID = 6182834493563598289L; - final transient org.apache.log4j.Logger logger; + final transient org.apache.log4j.Logger logger; - /** - * Following the pattern discussed in pages 162 through 168 of "The complete - * log4j manual". - */ - final static String FQCN = org.slf4j.helpers.AbstractLogger.class.getName(); + /** + * Following the pattern discussed in pages 162 through 168 of "The complete + * log4j manual". + */ - // Does the log4j version in use recognize the TRACE level? - // The trace level was introduced in log4j 1.2.12. - final boolean traceCapable; + final static String FQCN_NOMINAL = org.slf4j.helpers.AbstractLogger.class.getName(); + final static String FQCN_SUBSTITUE = FQCN_NOMINAL; + final static String FQCN_FLUENT = org.slf4j.spi.DefaultLoggingEventBuilder.class.getName(); - // WARN: Log4jLoggerAdapter constructor should have only package access so - // that - // only Log4jLoggerFactory be able to create one. - Log4jLoggerAdapter(org.apache.log4j.Logger logger) { - this.logger = logger; - this.name = logger.getName(); - traceCapable = isTraceCapable(); - } + + // Does the log4j version in use recognize the TRACE level? + // The trace level was introduced in log4j 1.2.12. + final boolean traceCapable; - private boolean isTraceCapable() { - try { - logger.isTraceEnabled(); - return true; - } catch (NoSuchMethodError e) { - return false; - } - } + // WARN: Log4jLoggerAdapter constructor should have only package access so + // that only Log4jLoggerFactory be able to create one. + Log4jLoggerAdapter(org.apache.log4j.Logger logger) { + this.logger = logger; + this.name = logger.getName(); + traceCapable = isTraceCapable(); + } - /** - * Is this logger instance enabled for the TRACE level? - * - * @return True if this Logger is enabled for level TRACE, false otherwise. - */ - public boolean isTraceEnabled() { - if (traceCapable) { - return logger.isTraceEnabled(); - } else { - return logger.isDebugEnabled(); - } - } - - /** - * Is this logger instance enabled for the DEBUG level? - * - * @return True if this Logger is enabled for level DEBUG, false otherwise. - */ - public boolean isDebugEnabled() { - return logger.isDebugEnabled(); - } + private boolean isTraceCapable() { + try { + logger.isTraceEnabled(); + return true; + } catch (NoSuchMethodError e) { + return false; + } + } - /** - * Is this logger instance enabled for the INFO level? - * - * @return True if this Logger is enabled for the INFO level, false otherwise. - */ - public boolean isInfoEnabled() { - return logger.isInfoEnabled(); - } + /** + * Is this logger instance enabled for the TRACE level? + * + * @return True if this Logger is enabled for level TRACE, false otherwise. + */ + public boolean isTraceEnabled() { + if (traceCapable) { + return logger.isTraceEnabled(); + } else { + return logger.isDebugEnabled(); + } + } - /** - * Is this logger instance enabled for the WARN level? - * - * @return True if this Logger is enabled for the WARN level, false otherwise. - */ - public boolean isWarnEnabled() { - return logger.isEnabledFor(Level.WARN); - } + /** + * Is this logger instance enabled for the DEBUG level? + * + * @return True if this Logger is enabled for level DEBUG, false otherwise. + */ + public boolean isDebugEnabled() { + return logger.isDebugEnabled(); + } + /** + * Is this logger instance enabled for the INFO level? + * + * @return True if this Logger is enabled for the INFO level, false otherwise. + */ + public boolean isInfoEnabled() { + return logger.isInfoEnabled(); + } - /** - * Is this logger instance enabled for level ERROR? - * - * @return True if this Logger is enabled for level ERROR, false otherwise. - */ - public boolean isErrorEnabled() { - return logger.isEnabledFor(Level.ERROR); - } + /** + * Is this logger instance enabled for the WARN level? + * + * @return True if this Logger is enabled for the WARN level, false otherwise. + */ + public boolean isWarnEnabled() { + return logger.isEnabledFor(Level.WARN); + } - - @Override - public void log(Marker marker, String callerFQCN, int level, String msg, Object[] arguments, Throwable t) { - Level log4jLevel = toLog4jLevel(level); - NormalizedParameters np = NormalizedParameters.normalize(msg, arguments, t); - String formattedMessage = MessageFormatter.basicArrayFormat(np.getMessage(), np.getArguments()); - logger.log(callerFQCN, log4jLevel, formattedMessage, np.getThrowable()); - } + /** + * Is this logger instance enabled for level ERROR? + * + * @return True if this Logger is enabled for level ERROR, false otherwise. + */ + public boolean isErrorEnabled() { + return logger.isEnabledFor(Level.ERROR); + } @Override - protected void handleNormalizedLoggingCall(org.slf4j.event.Level level, Marker marker, String msg, Object[] arguments, - Throwable throwable) { + public void log(Marker marker, String callerFQCN, int level, String msg, Object[] arguments, Throwable t) { + Level log4jLevel = toLog4jLevel(level); + NormalizedParameters np = NormalizedParameters.normalize(msg, arguments, t); + String formattedMessage = MessageFormatter.basicArrayFormat(np.getMessage(), np.getArguments()); + logger.log(callerFQCN, log4jLevel, formattedMessage, np.getThrowable()); + } + + @Override + protected void handleNormalizedLoggingCall(org.slf4j.event.Level level, Marker marker, String msg, + Object[] arguments, Throwable throwable) { Level log4jLevel = toLog4jLevel(level.toInt()); String formattedMessage = MessageFormatter.basicArrayFormat(msg, arguments); logger.log(getFullyQualifiedCallerName(), log4jLevel, formattedMessage, throwable); } /** - * Called by {@link SubstituteLogger} + * Called by {@link SubstituteLogger} or by {@link LoggingEventBuilder} instances * @param event */ public void log(LoggingEvent event) { @@ -169,57 +176,65 @@ public final class Log4jLoggerAdapter extends LegacyAbstractLogger implements Lo if (!logger.isEnabledFor(log4jLevel)) return; - org.apache.log4j.spi.LoggingEvent log4jevent = toLog4jEvent(event, log4jLevel); + org.apache.log4j.spi.LoggingEvent log4jevent = event2Log4jEvent(event, log4jLevel); logger.callAppenders(log4jevent); } - - private org.apache.log4j.spi.LoggingEvent toLog4jEvent(LoggingEvent event, Level log4jLevel) { - String formattedMessage = MessageFormatter.basicArrayFormat(event.getMessage(), event.getArgumentArray()); + private org.apache.log4j.spi.LoggingEvent event2Log4jEvent(LoggingEvent event, Level log4jLevel) { - LocationInfo locationInfo = new LocationInfo(NA_SUBST, NA_SUBST, NA_SUBST, "0"); + String formattedMessage = MessageFormatter.basicArrayFormat(event.getMessage(), event.getArgumentArray()); - ThrowableInformation ti = null; - Throwable t = event.getThrowable(); - if (t != null) - ti = new ThrowableInformation(t); + LocationInfo locationInfo = null; + String fcqn = null; + + if(event instanceof SubstituteLoggingEvent) { + locationInfo = new LocationInfo(NA_SUBST, NA_SUBST, NA_SUBST, "0"); + fcqn = FQCN_SUBSTITUE; + } else { + fcqn = FQCN_FLUENT; + } + + + ThrowableInformation ti = null; + Throwable t = event.getThrowable(); + if (t != null) + ti = new ThrowableInformation(t); - org.apache.log4j.spi.LoggingEvent log4jEvent = new org.apache.log4j.spi.LoggingEvent(FQCN, logger, event.getTimeStamp(), log4jLevel, formattedMessage, - event.getThreadName(), ti, null, locationInfo, null); + org.apache.log4j.spi.LoggingEvent log4jEvent = new org.apache.log4j.spi.LoggingEvent(fcqn, logger, + event.getTimeStamp(), log4jLevel, formattedMessage, event.getThreadName(), ti, null, locationInfo, + null); - return log4jEvent; - } + return log4jEvent; + } - - - private Level toLog4jLevel(int slf4jLevelInt) { - Level log4jLevel; - switch (slf4jLevelInt) { - case LocationAwareLogger.TRACE_INT: - log4jLevel = traceCapable ? Level.TRACE : Level.DEBUG; - break; - case LocationAwareLogger.DEBUG_INT: - log4jLevel = Level.DEBUG; - break; - case LocationAwareLogger.INFO_INT: - log4jLevel = Level.INFO; - break; - case LocationAwareLogger.WARN_INT: - log4jLevel = Level.WARN; - break; - case LocationAwareLogger.ERROR_INT: - log4jLevel = Level.ERROR; - break; - default: - throw new IllegalStateException("Level number " + slf4jLevelInt + " is not recognized."); - } - return log4jLevel; - } + private Level toLog4jLevel(int slf4jLevelInt) { + Level log4jLevel; + switch (slf4jLevelInt) { + case LocationAwareLogger.TRACE_INT: + log4jLevel = traceCapable ? Level.TRACE : Level.DEBUG; + break; + case LocationAwareLogger.DEBUG_INT: + log4jLevel = Level.DEBUG; + break; + case LocationAwareLogger.INFO_INT: + log4jLevel = Level.INFO; + break; + case LocationAwareLogger.WARN_INT: + log4jLevel = Level.WARN; + break; + case LocationAwareLogger.ERROR_INT: + log4jLevel = Level.ERROR; + break; + default: + throw new IllegalStateException("Level number " + slf4jLevelInt + " is not recognized."); + } + return log4jLevel; + } @Override protected String getFullyQualifiedCallerName() { - return FQCN; + return FQCN_NOMINAL; } }