org.springframework.web.servlet.mvc

Class ServletWrappingController

java.lang.Object

org.springframework.context.support.ApplicationObjectSupport

org.springframework.web.context.support.WebApplicationObjectSupport

org.springframework.web.servlet.support.WebContentGenerator

org.springframework.web.servlet.mvc.AbstractController

org.springframework.web.servlet.mvc.ServletWrappingController

All Implemented Interfaces:

Aware, BeanNameAware, DisposableBean, InitializingBean, ApplicationContextAware, ServletContextAware, Controller

public class ServletWrappingController
extends AbstractController
implements BeanNameAware, InitializingBean, DisposableBean

Spring Controller implementation that wraps a servlet instance which it manages internally. Such a wrapped servlet is not known outside of this controller; its entire lifecycle is covered here (in contrast to ServletForwardingController).

Useful to invoke an existing servlet via Spring's dispatching infrastructure, for example to apply Spring HandlerInterceptors to its requests.

Note that Struts has a special requirement in that it parses web.xml to find its servlet mapping. Therefore, you need to specify the DispatcherServlet's servlet name as "servletName" on this controller, so that Struts finds the DispatcherServlet's mapping (thinking that it refers to the ActionServlet).

Example: a DispatcherServlet XML context, forwarding "*.do" to the Struts ActionServlet wrapped by a ServletWrappingController. All such requests will go through the configured HandlerInterceptor chain (e.g. an OpenSessionInViewInterceptor). From the Struts point of view, everything will work as usual.

 <bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
   <property name="interceptors">
     <list>
       <ref bean="openSessionInViewInterceptor"/>
     </list>
   </property>
   <property name="mappings">
     <props>
       <prop key="*.do">strutsWrappingController</prop>
     </props>
   </property>
 </bean>

 <bean id="strutsWrappingController" class="org.springframework.web.servlet.mvc.ServletWrappingController">
   <property name="servletClass">
     <value>org.apache.struts.action.ActionServlet</value>
   </property>
   <property name="servletName">
     <value>action</value>
   </property>
   <property name="initParameters">
     <props>
       <prop key="config">/WEB-INF/struts-config.xml</prop>
     </props>
   </property>
 </bean>

Since:

1.1.1

Author:

Juergen Hoeller

See Also:

ServletForwardingController

Field Summary

Fields inherited from class org.springframework.web.servlet.support.WebContentGenerator

HEADER_CACHE_CONTROL, METHOD_GET, METHOD_HEAD, METHOD_POST

Fields inherited from class org.springframework.context.support.ApplicationObjectSupport

logger

Constructor Summary

Constructors

Constructor and Description
ServletWrappingController()

Method Summary

Modifier and Type	Method and Description
void	afterPropertiesSet() Initialize the wrapped Servlet instance.
void	destroy() Destroy the wrapped Servlet instance.
protected ModelAndView	handleRequestInternal(HttpServletRequest request, HttpServletResponse response) Invoke the wrapped Servlet instance.
void	setBeanName(String name) Set the name of the bean in the bean factory that created this bean.
void	setInitParameters(Properties initParameters) Specify init parameters for the servlet to wrap, as name-value pairs.
void	setServletClass(Class<? extends Servlet> servletClass) Set the class of the servlet to wrap.
void	setServletName(String servletName) Set the name of the servlet to wrap.

Methods inherited from class org.springframework.web.servlet.mvc.AbstractController

handleRequest, isSynchronizeOnSession, setSynchronizeOnSession

Methods inherited from class org.springframework.web.servlet.support.WebContentGenerator

applyCacheControl, applyCacheSeconds, applyCacheSeconds, cacheForSeconds, cacheForSeconds, checkAndPrepare, checkAndPrepare, checkRequest, getAllowHeader, getCacheControl, getCacheSeconds, getSupportedMethods, getVaryByRequestHeaders, isAlwaysMustRevalidate, isRequireSession, isUseCacheControlHeader, isUseCacheControlNoStore, isUseExpiresHeader, prepareResponse, preventCaching, setAlwaysMustRevalidate, setCacheControl, setCacheSeconds, setRequireSession, setSupportedMethods, setUseCacheControlHeader, setUseCacheControlNoStore, setUseExpiresHeader, setVaryByRequestHeaders

Methods inherited from class org.springframework.web.context.support.WebApplicationObjectSupport

getServletContext, getTempDir, getWebApplicationContext, initApplicationContext, initServletContext, isContextRequired, setServletContext

Methods inherited from class org.springframework.context.support.ApplicationObjectSupport

getApplicationContext, getMessageSourceAccessor, initApplicationContext, requiredContextClass, setApplicationContext

Methods inherited from class java.lang.Object

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

Constructor Detail

ServletWrappingController

public ServletWrappingController()

Method Detail

setServletClass

public void setServletClass(Class<? extends Servlet> servletClass)

Set the class of the servlet to wrap. Needs to implement javax.servlet.Servlet.

See Also:

Servlet

setServletName

public void setServletName(String servletName)

Set the name of the servlet to wrap. Default is the bean name of this controller.

setInitParameters

public void setInitParameters(Properties initParameters)

Specify init parameters for the servlet to wrap, as name-value pairs.

setBeanName

public void setBeanName(String name)

Description copied from interface: BeanNameAware

Set the name of the bean in the bean factory that created this bean.

Invoked after population of normal bean properties but before an init callback such as InitializingBean.afterPropertiesSet() or a custom init-method.

Specified by:

setBeanName in interface BeanNameAware

Parameters:

name - the name of the bean in the factory. Note that this name is the actual bean name used in the factory, which may differ from the originally specified name: in particular for inner bean names, the actual bean name might have been made unique through appending "#..." suffixes. Use the BeanFactoryUtils.originalBeanName(String) method to extract the original bean name (without suffix), if desired.

afterPropertiesSet

public void afterPropertiesSet()
                        throws Exception

Initialize the wrapped Servlet instance.

Specified by:

afterPropertiesSet in interface InitializingBean

Throws:

Exception - in the event of misconfiguration (such as failure to set an essential property) or if initialization fails for any other reason

See Also:

Servlet.init(javax.servlet.ServletConfig)

handleRequestInternal

protected ModelAndView handleRequestInternal(HttpServletRequest request,
                                             HttpServletResponse response)
                                      throws Exception

Invoke the wrapped Servlet instance.

Specified by:

handleRequestInternal in class AbstractController

Throws:

Exception

See Also:

Servlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)

destroy

public void destroy()

Destroy the wrapped Servlet instance.

Specified by:

destroy in interface DisposableBean

See Also:

Servlet.destroy()