What is Java Message Service (JMS) for?

Question

I am currently evaluating JMS and I don\'t get what I could use it for.

Currently, I believe this would be a Usecase: I want to create a SalesInvoice PDF and print it w

Answer 1

I've used it on a number of projects. It can help with scalability, decoupling of services, high availability. Here's a description of how I used it on a project several years ago:

http://coders-log.blogspot.com/2008/12/favorite-projects-series-installment-2.html

The description explains what JMS brought to the table for this particular project, but other projects will use messaging systems for a variety of reasons.

Answer 2

JMS is a message-oriented middleware.

• Why would a need a Standalone Server for Message Processing, vs. e.g. some simple inproc processing with Quartz scheduler?

It depends on what other components you may have. I guess. But I don't know anything about Quartz

• How does it interact with my application?

You send messages to the broker.

• Isn't it much too slow?

Compare to what ?

• What are Usecases you already implemented successfully?

I've used JMS to implement a SIP application server, to communicate between the various components.