Struts 2 Session in interceptor

I am trying to access session object from within my interceptor by implementing SessionAware interface (I've implemented the setSession method), but I am not able to get my session object this way.

Then I tried ActionContext.getContext().getSession() and I am able to get the session, but I don't know but its coming out to be empty for only the first time in every browser for every user & then it comes filled when another action is invoked.

I assume there is something wrong going with the session. Why is it giving me an empty session only for the first time? Does it set something only after giving empty session for the first time?

If this is the case then everyone will be shown as guest on their first request & then with a username on their 2nd request & hence forth.

Or am I getting the session in the wrong way?

I saw code to get sessions in interceptors, but this does not work for me as it cannot find the constant HTTP_REQUEST.

final ActionContext context = invocation.getInvocationContext();

HttpServletRequest request = (HttpServletRequest) context.get(HTTP_REQUEST);

HttpSession session = request.getSession(true);

Object user = session.getAttribute(Constants.USER_HANDLE);

Any suggestion on resolving any of the problems?

Something I forgot to mention - my website is a secure site(https), so if the user is not logged in, it would not let hi开发者_JS百科m enter the website & if he is logged in, at least his username should be there in the session. Shouldn't it be?

I have an interceptor that also grabs the session as a map. Have you tried something like this? This works for me.

public String intercept( ActionInvocation actionInvocation ) throws Exception {
    Map session = actionInvocation.getInvocationContext().getSession();

You can use the following to return the HttpSession -- and create it if it doesn't exist.

HttpSession session = ServletActionContext.getRequest().getSession(true);

If you need the Map instead, then you can just call this right after that last call (since you passed true, the session would have been created and the next call will return a blank session map).

Map<String, Object> session = ActionContext.getContext().getSession();

Alternatively, you can use the CreateSessionInterceptor early in your stack so that the session is created by the time you need it. Then just use the map example above to get it.

FYI: ServletActionContext is a subclass of ActionContext that just has convenience methods for getting the request and response without needing to use the constants like you were trying in your example.

Try this. It worked for me in struts 2.0.14.

public String intercept(ActionInvocation ai) throws Exception {

     Map session = ActionContext.getContext().getSession(); 

You can get the session on Interceptor using ActionContext itself...refer the following code snippet:

SessionMap<String, Object> session = ActionContext.getContext().getSession();

or alternatively you can follow this approach: The request is available on the ActionContext instance, which is made available via ThreadLocal.

HttpServletRequest request = ServletActionContext.getRequest();
HttpSession session = request.getSession(true);

Add the import:

import org.apache.struts2.StrutsStatics;