Hibernate/Java EE event/messaging mechanism

Question

I have two applications. One is a Java thick client Swing GUI for controlling some parameters which are stored in the DB. The other is a Java EE server side application which sends XML streams clients based on the parameters set by the GUI.

I would like the server side app to update its state as soon as the Swing GUI persists changes to the DB. What would be the best way of achieving this?

thanks for your very useful comment...maybe i should tick answers which are wrong or make up answers for unanswered questions? thxs for your constructive input. — DD., Nov 01 '10 at 15:30

score 1 · Accepted Answer · edited May 23 '17 at 11:54

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If the thick client is updating your database directly, then you have two options:

Use database specific event notification. Capabilities and techniques vary greatly depending on database.
Have the server-side application poll the database looking for changes.

Assuming your thick client updates the database through a server-side application then you have multiple options depending on actual design and implementation:

You could implement an observable pattern in your domain objects so that your server application can be notified anytime important domain objects are changed.
If using Hibernate, you could use Hibernate interceptors and events.
You could use a caching solution, such as Ehcache. (If you need transactional semantics, then perhaps JBoss Cache.)
You could use shared memory solutions such as Terracotta or Hazelcast.

edited May 23 '17 at 11:54

Community

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answered Nov 01 '10 at 13:48

kaliatech

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The client will persist directly to the DB. Could I use some kind of JMS messaging to alert the server instead of polling? – DD. Nov 01 '10 at 14:54
Something will have to initiate the JMS message. Are you asking if your Swing client could initiate the JMS message? Of course, and the server application could then receive the message. Regardless of JMS use though (which is just an alternative communications layer), I think it's still the same question/answer. Specifically, who/what will initiate the notification event on change. – kaliatech Nov 01 '10 at 20:27

score 0 · Answer 2 · answered Nov 01 '10 at 13:40

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What about making the Swing GUI app talk to server side app which talk to the db:

SwingGui -> ServerSideApp -> DB
Clients <-> ServerSideApp <-> DB

answered Nov 01 '10 at 13:40

Boris Pavlović

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Hibernate/Java EE event/messaging mechanism

2 Answers2