/**
* Routes the current exception to an error endpoint such as a Dead Letter Queue (jms) This method
* is only invoked if there is a UMOMassage available to dispatch. The message dispatched from
* this method will be an <code>ExceptionMessage</code> which contains the exception thrown the
* UMOMessage and any context information.
*
* @param message the UMOMessage being processed when the exception occurred
* @param failedEndpoint optional; the endpoint being dispatched or recieved on when the error
* occurred. This is NOT the endpoint that the message will be disptched on and is only
* supplied to this method for logging purposes
* @param t the exception thrown. This will be sent with the ExceptionMessage
* @see ExceptionMessage
*/
protected void routeException(UMOMessage message, UMOEndpoint failedEndpoint, Throwable t) {
UMOEndpoint endpoint = getEndpoint(t);
if (endpoint != null) {
try {
logger.error(
"Message being processed is: " + (message == null ? "null" : message.toString()));
UMOEventContext ctx = RequestContext.getEventContext();
ExceptionMessage msg = null;
if (failedEndpoint != null) {
msg = new ExceptionMessage(getErrorMessagePayload(message), endpoint, t, ctx);
} else {
msg = new ExceptionMessage(getErrorMessagePayload(message), t, ctx);
}
ctx.sendEvent(new MuleMessage(msg, null), endpoint);
logger.debug("routed Exception message via " + endpoint);
} catch (UMOException e) {
logFatal(message, e);
}
} else {
markTransactionForRollback();
}
}
/**
* Logs a fatal error message to the logging system. This should be used mostly if an error occurs
* in the exception listener itself. This implementation logs the the message itself to the logs
* if it is not null
*
* @param message The UMOMessage currently being processed
* @param t the fatal exception to log
*/
protected void logFatal(UMOMessage message, Throwable t) {
logger.fatal(
"Failed to dispatch message to error queue after it failed to process. This may cause message loss."
+ (message == null ? "" : "Logging Message here: \n" + message.toString()),
t);
}
