Hi Guice users.
I have an application which is a colourful mixture of legacy code (JDBC +
Apache SOAP Webservices), as well as a lot of newer frameworks, primarily
JAX-WS. The application is actually a Java Web Start application, but on
the data exchange occurs via the legacy web services as well as newer web
services. The application server is Apache Tomcat.
Over the last year I have been slowly rolling out Google Guice accross the
entire client, without much difficulty. Since the Server also shares some
code, the server has also had is share of injection. However I haven't been
using the Guice Servlet on the server, but rather in the main constructors
I called injectMembers(this);...simple but effective....until now.
My problem is that I often have need for Providers. These providers should
provide different instances based on the user "context" username, mail
address, etc. My problem is, the providers doen't have a way of accessing
the session...of which there are multiple different sessions. Apache SOAP
has (or could have) its own session, JAX-WS has (or could have) its own
session, JSF and JSP also have their sessions. My first thought was to
store the User Context in the Session and access it.
public UserContext get() {
//this is JSF Faces specific
Map<String, Object> sessionMap =
FacesContext.getCurrentInstance().getExternalContext().getSessionMap();
UserContext userContext = (
UserContext)sessionMap.get("ATERM_CONTEXT");
return userContext;
}
Here the problem is, JSF hasn't always been instantiated. It is not even a
problem that there are 4 different sessions floating around for one User
Context. It may not be a beutiful design, but it works. Each Web Service
method just needs to update the user context to the current value (or
become stateful).
My problem is I just need the Provider to access the UserContext of this
session. Regardless of which technology created the session. i.e. I can't
access the session using JSF technology as shown above. Null Pointer
Exception :(
My thought is that I could use Google Guice to make a session scope to
provide a (new) user context for each session? In my stateless web
services, I would need to update this session from the method call....but I
could also work towards making the web services stateful. Could such an
approch work? Will Google Guice be able to access the state for all of
these different technologies?
Thanks
Martin
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