org.apache.struts2.interceptor

## Class TokenSessionStoreInterceptor

- java.lang.Object
- - com.opensymphony.xwork2.interceptor.AbstractInterceptor
  - - com.opensymphony.xwork2.interceptor.MethodFilterInterceptor
    - - org.apache.struts2.interceptor.TokenInterceptor
      - - org.apache.struts2.interceptor.TokenSessionStoreInterceptor

- All Implemented Interfaces:
    Interceptor, Serializable

      public class TokenSessionStoreInterceptor
      extends TokenInterceptor

  This interceptor builds off of the `TokenInterceptor`, providing advanced logic for handling invalid tokens. Unlike the normal token interceptor, this interceptor will attempt to provide intelligent fail-over in the event of multiple requests using the same session. That is, it will block subsequent requests until the first request is complete, and then instead of returning the invalid.token code, it will attempt to display the same response that the original, valid action invocation would have displayed if no multiple requests were submitted in the first place.

  NOTE: As this method extends off MethodFilterInterceptor, it is capable of deciding if it is applicable only to selective methods in the action class. See `MethodFilterInterceptor` for more info.

  Interceptor parameters:

  - None

  Extending the interceptor:

  There are no known extension points for this interceptor.

  Example code:

       <action name="someAction" class="com.examples.SomeAction">
           <interceptor-ref name="tokenSession/>
           <interceptor-ref name="basicStack"/>
           <result name="success">good_result.ftl</result>
       </action>

       <-- In this case, myMethod of the action class will not
              get checked for invalidity of token -->
       <action name="someAction" class="com.examples.SomeAction">
           <interceptor-ref name="tokenSession>
               <param name="excludeMethods">myMethod</param>
           </interceptor-ref name="tokenSession>
           <interceptor-ref name="basicStack"/>
           <result name="success">good_result.ftl</result>
       </action>

  See Also:
    Serialized Form

- - ### Field Summary

    - ### Fields inherited from class org.apache.struts2.interceptor.TokenInterceptor

      `INVALID_TOKEN_CODE`

    - ### Fields inherited from class com.opensymphony.xwork2.interceptor.MethodFilterInterceptor

      `excludeMethods, includeMethods`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `TokenSessionStoreInterceptor()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected String` | `handleInvalidToken(ActionInvocation invocation)` Handles processing of invalid tokens.
    `protected String` | `handleToken(ActionInvocation invocation)`
    `protected String` | `handleValidToken(ActionInvocation invocation)` Handles processing of valid tokens.

    - ### Methods inherited from class org.apache.struts2.interceptor.TokenInterceptor

      `doIntercept, getErrorMessage, setTextProviderFactory`

    - ### Methods inherited from class com.opensymphony.xwork2.interceptor.MethodFilterInterceptor

      `applyInterceptor, getExcludeMethodsSet, getIncludeMethodsSet, intercept, setExcludeMethods, setIncludeMethods`

    - ### Methods inherited from class com.opensymphony.xwork2.interceptor.AbstractInterceptor

      `destroy, init`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### TokenSessionStoreInterceptor

          public TokenSessionStoreInterceptor()

  - ### Method Detail

    - #### handleToken

          protected String handleToken(ActionInvocation invocation)
                                throws Exception

      Overrides:
        `handleToken` in class `TokenInterceptor`
      Throws:
        `Exception`

    - #### handleInvalidToken

          protected String handleInvalidToken(ActionInvocation invocation)
                                       throws Exception

      Handles processing of invalid tokens. If a previously stored invocation is available, the method will attempt to return and render its result. Otherwise it will return INVALID_TOKEN_CODE. Note: Because a stored (previously completed) invocation's PageContext will be closed, this method must replace the stored PageContext with the current invocation's one (or a null). See `InvocationSessionStore.loadInvocation(String key, String token)` for details.
      Overrides:
        `handleInvalidToken` in class `TokenInterceptor`
      Parameters:
        `invocation` -
      Returns:
      Throws:
        `Exception`

    - #### handleValidToken

          protected String handleValidToken(ActionInvocation invocation)
                                     throws Exception

      Handles processing of valid tokens. Stores the current invocation for later use by `handleInvalidToken`. See `InvocationSessionStore.storeInvocation(String key, String token, ActionInvocation invocation)` for details.
      Overrides:
        `handleValidToken` in class `TokenInterceptor`
      Parameters:
        `invocation` -
      Returns:
      Throws:
        `Exception`

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