Re: Fw: Using the HttpSession object with openamf

I use sessions with OpenAMF, and haven't had any troubles. Be sure the 
client has cookies enabled, of course.

I don't access HttpSession, I let OpenAMF manage all this. I store my 
user data in a dedicated data object. This class just nothing but the 
data I want stored in session. It implements Serializable. It also 
implements HttpSessionBindingListener, so I can see when it gets created 
and destroyed.

All my service functions take this data object as an argument. That is, 
they get the session data as a direct parameter. I don't have to do 
anything special with RequestContext or HttpSession to get at this data. 
(As an aside, I do use RequestContext.getHttpSession(), but for other 
reasons. Sometimes I want to know the servername, for example.)

In my openamf-config.xml file, I have:

    <state-bean>
        <name>LearnerData</name>
        <class>com.example.LearnerData</class>
        <scope>session</scope>
    </state-bean>   

    <service>
        <name>LearnerService</name>
        <service-location>com.example.LearnerService</service-location>
        <invoker-ref>Java</invoker-ref>
       
        <method>
            <name>*</name>
            <state-bean-ref><name>LearnerData</name></state-bean-ref>
            <parameter><type>*</type></parameter>
        </method>
    </service>

The <state-bean> declaration declares a Bean which is stored in session. 
The <service> exposes all methods in LearnerService to Flash, without 
explicily saying what the argument lists are. In LearnerService, I have 
method defs like this:

    public  static ASObject doStuff(String arg1, Boolean arg2, 
LearnerData learnerData) {
         // doStuff here. Session Bean is learnerData
   }


Inside my service methods, I always check that learnerData is non-null. 
It will be null if the session has expired.

I also syncronize on learnerData, so there is never more than 1 thread 
working on any given learnerData object.

But, generally, I use session objects, without dealing directly with 
HttpSession.

- Todd





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