[SOLVED] Passing parameters in URL query string to Action through interceptor

Passing parameters in URL query string to Action through interceptor

I have an interceptor that is working fine except the query string is not being passed on to the action from the interceptor.

    <action name="EditIroCase" class="iro.action.IroCaseAction">
                <interceptor-ref name="authIro"/>
                <result name="success">iro/IroCaseFORM.jsp</result>
     </action>

URL: /EditIroCase.action?id=123

Action is an existing one that I am adding the interceptor to. Implementing ParametersAware in Action to get ID from URL and that works fine.

Tried a couple different things, but can't seem to make it work. Used lots of interceptors, just never needed to maintain a param across its execution.

Solution

Interceptors work slightly different rather than actions. Because they belong to the action. So you can't add an action to the interceptor, but interceptor to the action.

You should know if you are using xml configuration or annotations, or another configuration provider, interceptors are stored in the collection such as List or Set, doesn't matter, but all of them in one place. Using <interceptor-ref> tag inside the <action> overrides the interceptor's config. By default actions are configured using <default-interceptor-ref> tag, which is defined in the struts-default.xml from the core package, and it points to defaultStack. This stack is designed to serve all your needs, but if you use a custom interceptor then you should explicitly add reference to defaultStack or create a custom stack which you would reference.

<action name="EditIroCase" class="iro.action.IroCaseAction">
        <interceptor-ref name="authIro"/>
        <interceptor-ref name="defaultStack"/>
        <result name="success">iro/IroCaseFORM.jsp</result>
</action>

Now parameters should be populated.