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## org.codehaus.groovy.grails.web.servlet
Class GrailsDispatcherServlet

    java.lang.Object
      javax.servlet.GenericServlet
          javax.servlet.http.HttpServlet
              org.springframework.web.servlet.HttpServletBean
                  org.springframework.web.servlet.FrameworkServlet
                      org.springframework.web.servlet.DispatcherServlet
                          org.codehaus.groovy.grails.web.servlet.GrailsDispatcherServlet

All Implemented Interfaces:
  Serializable, Servlet, ServletConfig

Direct Known Subclasses:
  ErrorHandlingServlet

    public class GrailsDispatcherServlet

extends DispatcherServlet

Handles incoming requests for Grails.

Loads the Spring configuration based on the Grails application in the parent application context.

Since:
  Jul 2, 2005
Author:
  Steven Devijver, Graeme Rocher
See Also:
  Serialized Form

Field Summary
`protected HandlerInterceptor[]` | `interceptors`
`protected MultipartResolver` | `multipartResolver`

Fields inherited from class org.springframework.web.servlet.DispatcherServlet
`HANDLER_ADAPTER_BEAN_NAME, HANDLER_EXCEPTION_RESOLVER_BEAN_NAME, HANDLER_EXECUTION_CHAIN_ATTRIBUTE, HANDLER_MAPPING_BEAN_NAME, LOCALE_RESOLVER_ATTRIBUTE, LOCALE_RESOLVER_BEAN_NAME, MULTIPART_RESOLVER_BEAN_NAME, PAGE_NOT_FOUND_LOG_CATEGORY, pageNotFoundLogger, REQUEST_TO_VIEW_NAME_TRANSLATOR_BEAN_NAME, THEME_RESOLVER_ATTRIBUTE, THEME_RESOLVER_BEAN_NAME, THEME_SOURCE_ATTRIBUTE, VIEW_RESOLVER_BEAN_NAME, WEB_APPLICATION_CONTEXT_ATTRIBUTE`

Fields inherited from class org.springframework.web.servlet.FrameworkServlet
`DEFAULT_CONTEXT_CLASS, DEFAULT_NAMESPACE_SUFFIX, SERVLET_CONTEXT_PREFIX`

Fields inherited from class org.springframework.web.servlet.HttpServletBean
`logger`

Constructor Summary
`GrailsDispatcherServlet()` Constructor.

Method Summary
`protected HttpServletRequest` | `checkMultipart(HttpServletRequest request)` Convert the request into a multipart request.
`protected void` | `copyParamsFromPreviousRequest(GrailsWebRequest previousRequestAttributes, GrailsWebRequest requestAttributes)`
`protected WebApplicationContext` | `createWebApplicationContext(WebApplicationContext parent)`
`void` | `destroy()`
`protected void` | `doDispatch(HttpServletRequest request, HttpServletResponse response)`
`protected HandlerInterceptor[]` | `establishInterceptors(WebApplicationContext webContext)` Evalutes the given WebApplicationContext for all HandlerInterceptor and WebRequestInterceptor instances
`HandlerExecutionChain` | `getHandler(HttpServletRequest request, boolean cache)`
`protected void` | `initFrameworkServlet()`
`protected void` | `initStrategies(ApplicationContext context)`
`void` | `setApplication(GrailsApplication application)` Dependency injection for the application.
`protected void` | `triggerAfterCompletion(HandlerExecutionChain mappedHandler, int interceptorIndex, HttpServletRequest request, HttpServletResponse response, Exception ex)` Trigger afterCompletion callbacks on the mapped HandlerInterceptors.
`protected HttpServletResponse` | `useWrappedOrOriginalResponse(HttpServletResponse response)`

Methods inherited from class org.springframework.web.servlet.DispatcherServlet
`buildLocaleContext, cleanupMultipart, createDefaultStrategy, doService, getDefaultStrategies, getDefaultStrategy, getDefaultViewName, getHandlerAdapter, getLastModified, getMultipartResolver, getThemeSource, noHandlerFound, onRefresh, processHandlerException, render, resolveViewName, setCleanupAfterInclude, setDetectAllHandlerAdapters, setDetectAllHandlerExceptionResolvers, setDetectAllHandlerMappings, setDetectAllViewResolvers`

Methods inherited from class org.springframework.web.servlet.FrameworkServlet
`createWebApplicationContext, doDelete, doGet, doOptions, doPost, doPut, doTrace, findWebApplicationContext, getContextAttribute, getContextClass, getContextConfigLocation, getNamespace, getServletContextAttributeName, getUsernameForRequest, getWebApplicationContext, initServletBean, initWebApplicationContext, onApplicationEvent, postProcessWebApplicationContext, processRequest, refresh, setContextAttribute, setContextClass, setContextConfigLocation, setDispatchOptionsRequest, setDispatchTraceRequest, setNamespace, setPublishContext, setPublishEvents, setThreadContextInheritable`

Methods inherited from class org.springframework.web.servlet.HttpServletBean
`addRequiredProperty, getServletContext, getServletName, init, initBeanWrapper`

Methods inherited from class javax.servlet.http.HttpServlet
`doHead, service, service`

Methods inherited from class javax.servlet.GenericServlet
`getInitParameter, getInitParameterNames, getServletConfig, getServletInfo, init, log, log`

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

Field Detail

### interceptors

    protected HandlerInterceptor[] interceptors

### multipartResolver

    protected MultipartResolver multipartResolver

Constructor Detail

### GrailsDispatcherServlet

    public GrailsDispatcherServlet()

  Constructor.

Method Detail

### initFrameworkServlet

    protected void initFrameworkServlet()
                                 throws ServletException,
                                        BeansException

  Overrides:
    `initFrameworkServlet` in class `FrameworkServlet`
  Throws:
    `ServletException`
    `BeansException`

### initStrategies

    protected void initStrategies(ApplicationContext context)

  Overrides:
    `initStrategies` in class `DispatcherServlet`

### createWebApplicationContext

    protected WebApplicationContext createWebApplicationContext(WebApplicationContext parent)
                                                         throws BeansException

  Overrides:
    `createWebApplicationContext` in class `FrameworkServlet`
  Throws:
    `BeansException`

### establishInterceptors

    protected HandlerInterceptor[] establishInterceptors(WebApplicationContext webContext)

  Evalutes the given WebApplicationContext for all HandlerInterceptor and WebRequestInterceptor instances

  Parameters:
    `webContext` - The WebApplicationContext
  Returns:
    An array of HandlerInterceptor instances

### destroy

    public void destroy()

  Specified by:
    `destroy` in interface `Servlet`
  Overrides:
    `destroy` in class `FrameworkServlet`

### setApplication

    public void setApplication(GrailsApplication application)

  Dependency injection for the application.

  Parameters:
    `application` - the application

### doDispatch

    protected void doDispatch(HttpServletRequest request,
                              HttpServletResponse response)
                       throws Exception

  Overrides:
    `doDispatch` in class `DispatcherServlet`
  Throws:
    `Exception`

### useWrappedOrOriginalResponse

    protected HttpServletResponse useWrappedOrOriginalResponse(HttpServletResponse response)

### copyParamsFromPreviousRequest

    protected void copyParamsFromPreviousRequest(GrailsWebRequest previousRequestAttributes,
                                                 GrailsWebRequest requestAttributes)

### triggerAfterCompletion

    protected void triggerAfterCompletion(HandlerExecutionChain mappedHandler,
                                          int interceptorIndex,
                                          HttpServletRequest request,
                                          HttpServletResponse response,
                                          Exception ex)
                                   throws Exception

  Trigger afterCompletion callbacks on the mapped HandlerInterceptors. Will just invoke afterCompletion for all interceptors whose preHandle invocation has successfully completed and returned true.

  Parameters:
    `mappedHandler` - the mapped HandlerExecutionChain
    `interceptorIndex` - index of last interceptor that successfully completed
    `ex` - Exception thrown on handler execution, or `null` if none
  Throws:
    `Exception`
  See Also:
    `HandlerInterceptor.afterCompletion(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, java.lang.Object, java.lang.Exception)`

### checkMultipart

    protected HttpServletRequest checkMultipart(HttpServletRequest request)
                                         throws MultipartException

  Convert the request into a multipart request. If no multipart resolver is set, simply use the existing request.

  Overrides:
    `checkMultipart` in class `DispatcherServlet`
  Parameters:
    `request` - current HTTP request
  Returns:
    the processed request (multipart wrapper if necessary)
  Throws:
    `MultipartException`

### getHandler

    public HandlerExecutionChain getHandler(HttpServletRequest request,
                                            boolean cache)
                                     throws Exception

  Overrides:
    `getHandler` in class `DispatcherServlet`
  Throws:
    `Exception`

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