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This interceptor calls prepare() on actions which implement
Preparable . This interceptor is very useful for
any situation where you need to ensure some logic runs before the actual execute method runs.
A typical use of this is to run some logic to load an object from the database so that when parameters are set
they can be set on this object. For example, suppose you have a User object with two properties: id and
name. Provided that the params interceptor is called twice (once before and once after this interceptor), you
can load the User object using the id property, and then when the second params interceptor is called the parameter
user.name will be set, as desired, on the actual object loaded from the database. See the example for more
info.
Interceptor parameters:
Extending the interceptor:
There are no known extension points to this interceptor.
Example code:
<!-- Calls the params interceptor twice, allowing you to
pre-load data for the second time parameters are set -->
<action name="someAction" class="com.examples.SomeAction">
<interceptor-ref name="params"/>
<interceptor-ref name="prepare"/>
<interceptor-ref name="basicStack"/>
<result name="success">good_result.ftl</result>
</action>
Date: Nov 5, 2003 2:33:11 AM
author:
Jason Carreira
author:
Philip Luppens
author:
tm_jee
See Also: com.opensymphony.xwork.Preparable |
