How can I get stored session values in multiple Struts 2 action classes?

Question

How can I get stored session values in multiple Struts 2 action classes?

I do not want to use SessionAware interface in all the actions.

Answer 1

You have three options:

1. Do it right and use SessionAware.
2. Do it right and use a base action class that uses SessionAware.
3. Do it wrong and use ActionContext:

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

Documented on the Struts 2 wiki under How do we get access to the session.

Why wouldn't you want to use SessionAware and make your actions more-easily testable?

Answer 2

If you don't want to use SessionAware in multiple classes then at least you can use one abstract class or interface your action classes extend. It will inject a SessionMap to your action class instances.

Other ways to obtain a SessionMap or directly HttpSession are from here:

If you want to put something to the session you should get the session map from the action context

Map<String, Object> session = >ActionContext.getContext().getSession();
session.put("username", username);
session.put("role", 1);

or use servlet session directly

HttpSession session = >ServletActionContext.getRequest().getSession(); 
session.setAttribute("username", username);
session.setAttribute("role", 1);

But the first case is preferable, due to it's supported by the framework.

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More other options (you have at least another five options):

• implement the scopedModelDriven interceptor;
• use scope interceptor;
• use scoped bean configuration and inject it to the action;
• use custom annotation (i.e Conversation plugin)
• use Spring plugin and use spring bean scopes.