Another technology that I’ve used often for notification is the Log4j SMTPAppender. Using this, whatever messages that I log in my program will be emailed to the admin.

Why build that into the program when you can easily manage it with AOP. It’s very similar to the auditing idea.

In one of my previous application i made a web services framework with Spring, Spring AOP and XFire (now Apache CXF) to transparently consuming and exposing web services with validation, logging, security and content translation (like “0″ from SAP is “OK” for our system).

I made couple of services interacting with SAP Pi for testing and my team made 7 more services with zero knowledge on web services.

The team can actually concentrate on business logic development rather exposing them as a web services, validation and other repetitive stuffs.

class EventGenerator{
@Out
private Data data;

@RaiseEvent(“x-event-queue”)
public void processData(){
// process data
// set @Out field values
} // Spring AOP @Around will multicast the event after this method execution
}

It’s working really cool.