架构java gwt + jsf2 + spring封装

Question

I am planning to do a website that has GWT as admin interface, JSF 2 as frontend and spring to handle business logic.

Basicly. I will have 3 projects:

1. GWT
2. spring (business logic which also might export some web services in the future)
3. JSF 2

In GWT I am planning to have spring context (from the dependend spring-project) and use it to connect to database?

1. Is this possible to create 3 projects in eclipse, refer as dependencies them and then create an EAR that contains all of these?
2. What happens to user session? stored in GWT and JSF 2?
3. Is it a good architecture? how can be this done somehow else?
4. How do I package those? all war files? or jar? in a single ear... or?

Answer 1

First of all why do you want to use two different client side technologies together ( JSF2 and GWT )? I would rather stick to one of them.

Saying that: Yes, it is possible to have 3 different projects. Actually the recommended way (at least with GWT and Spring or any other backend) is to have them in separate projects.

Is this possible to create 3 projects in eclipse, refer as dependencies them and then create an EAR that contains all of these?

Well at least with GWT you usually can't access the backend/database directly (not sure about JSF2). You have to use some kind of communication protocol ( RequestBuilder , RequestFactory , GWT-RPC , REST ) You can have shared classes (in package xxx.shared ) that can be referenced by both your GWT and your Spring application (that is normally used by GWT-RPC or RequestFactory )

What happens to user session? stored in GWT and JSF 2?

There is nothing special about user sessions. GWT and JSF communicate via HTTP requests with the backend. So the same thing that applies to normal HTTP requests also applies to GWT/JSF2 requests.

Is it a good architecture? how can be this done somehow else?

It depends on what you want to achieve. As mentioned before I would rather stick to one client side technology ( GWT or JSF2 ) rather than using both of them.

How do I package those? all war files? or jar? in a single ear... or?

GWT compiles down to javascript which is included in your host file. So you usually create one WAR or EAR file that gets deployed to the application server.

Answer 2

I will answer my question because I will give more details for the next guys that will want to do the same thing I do:

In Eclipse:

1. Create new Java EE Application normaly with 3 or how many modules you want
2. Add new GWT project
3. Add the existing GWT project to the Java EE descriptor (to be added in ear)
4. In project builder you should have this:
5. Compile the GWT Apllication once:
6. After you deployed your application in glassfish access your website with chrome at this URL: http://localhost:8080/Admin/?gwt.codesvr=127.0.0.1:9997

What you need to know:

• Servlets are hot deployed
• Any modification you do on servlets will change server part
• Any modification you do on GWT Application google chrome plugin will take care of it

My environment:

• JDK 1.7.0_11
• Eclipse 4.2 Java EE ( + GWT Plugin , + Spring plugin )
• Glassfish 3.1.2.2