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Create Session Interceptor

This interceptor creates the HttpSession if it doesn't exist, also SessionMap is recreated and put in ServletActionContext.

This is particular useful when using the <@s.token> tag in freemarker templates. The tag do require that a HttpSession is already created since freemarker commits the response to the client immediately.


Extending the Interceptor


 <action name="someAction" class="com.examples.SomeAction">
     <interceptor-ref name="createSession"/>
     <interceptor-ref name="defaultStack"/>
     <result name="input">input_with_token_tag.ftl</result>