com.opensymphony.xwork2.spring.interceptor: public class: ActionAutowiringInterceptor

com.opensymphony.xwork2.spring.interceptor
public class: ActionAutowiringInterceptor [javadoc | source]

java.lang.Object
   com.opensymphony.xwork2.interceptor.AbstractInterceptor
      com.opensymphony.xwork2.spring.interceptor.ActionAutowiringInterceptor

All Implemented Interfaces:
org.springframework.context.ApplicationContextAware, Interceptor

TODO: Give a description of the Interceptor. TODO: Describe the paramters for this Interceptor. TODO: Discuss some possible extension of the Interceptor.


<!-- TODO: Describe how the Interceptor reference will effect execution -->
<action name="someAction" class="com.examples.SomeAction">
     TODO: fill in the interceptor reference.
    <interceptor-ref name=""/>
    <result name="success">good_result.ftl</result>
</action>

Autowires action classes to Spring beans. The strategy for autowiring the beans can be configured by setting the parameter on the interceptor. Actions that need access to the ActionContext can implements the ApplicationContextAware interface. The context will also be placed on the action context under the APPLICATION_CONTEXT attribute.

author: Simon - Stewart

author: Eric - Hauser

Field Summary
public static final String	APPLICATION_CONTEXT

Method from com.opensymphony.xwork2.spring.interceptor.ActionAutowiringInterceptor Summary:
getApplicationContext, intercept, setApplicationContext, setAutowireStrategy

Methods from com.opensymphony.xwork2.interceptor.AbstractInterceptor:
destroy, init, intercept

Methods from java.lang.Object:
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from com.opensymphony.xwork2.spring.interceptor.ActionAutowiringInterceptor Detail:
protected ApplicationContext getApplicationContext() { return context; }
public String intercept(ActionInvocation invocation) throws Exception { if (!initialized) { ApplicationContext applicationContext = (ApplicationContext) ActionContext.getContext().getApplication().get( WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE); if (applicationContext == null) { LOG.warn("ApplicationContext could not be found. Action classes will not be autowired."); } else { setApplicationContext(applicationContext); factory = new SpringObjectFactory(); factory.setApplicationContext(getApplicationContext()); if (autowireStrategy != null) { factory.setAutowireStrategy(autowireStrategy.intValue()); } } initialized = true; } if (factory != null) { Object bean = invocation.getAction(); factory.autoWireBean(bean); ActionContext.getContext().put(APPLICATION_CONTEXT, context); } return invocation.invoke(); } Looks for the `ApplicationContext` under the attribute that the Spring listener sets in the servlet context. The configuration is done the first time here instead of in init() since the `ActionContext` is not available during `Interceptor` initialization. Autowires the action to Spring beans and places the `ApplicationContext` on the `ActionContext` TODO Should this check to see if the `SpringObjectFactory` has already been configured instead of instantiating a new one? Or is there a good reason for the interceptor to have it's own factory?
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { context = applicationContext; }
public void setAutowireStrategy(Integer autowireStrategy) { this.autowireStrategy = autowireStrategy; }