Examples of org.apache.struts.action.RequestProcessor

org.apache.struts.action.RequestProcessor

RequestProcessor contains the processing logic that the {@link ActionServlet} performs as it receives each servlet request from thecontainer. You can customize the request processing behavior by subclassing this class and overriding the method(s) whose behavior you are interested in changing.
@version $Rev: 421119 $ $Date: 2006-07-11 21:49:11 -0700 (Tue, 11 Jul 2006) $ @since Struts 1.1


    PageFlowRequestProcessor getRequestProcessor()
    {
        ModuleConfig mc = getModuleConfig();
        String key = Globals.REQUEST_PROCESSOR_KEY + mc.getPrefix();
        RequestProcessor rp = ( RequestProcessor ) getServletContext().getAttribute( key );


        //
        // The RequestProcessor may not have been initialized -- if so, just return a new (temporary) one.
        //
        if ( rp == null )
        {
            try
            {
                ControllerConfig cc = mc.getControllerConfig();
                rp = ( RequestProcessor ) RequestUtils.applicationInstance( cc.getProcessorClass() );
                rp.init( InternalUtils.getActionServlet( getServletContext() ), mc );
            }
            catch ( Exception e )
            {
                _log.error( "Could not initialize request processor for module " + mc.getPrefix(), e );
            }
        }


        assert rp == null || rp instanceof PageFlowRequestProcessor : rp.getClass().getName();
        return ( PageFlowRequestProcessor ) rp;
    }

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                                                request, response, servletContext,
                                                new Object[]{ modulePath } );
                return;
            }
                    
            RequestProcessor requestProcessor = getRequestProcessor( moduleConfig );
            requestProcessor.process( request, response );
        }
        else
        {
            //
            // Here, we're checking to see if this was a module that was registered externally by Struts (not by this
            // servlet).  This is the same as the base process() behavior, but it checks for a missing
            // module-configuration.
            //
            ModuleConfig moduleConfig = null;
            
            if ( InternalUtils.getModuleConfig( RequestUtils.getModuleName( request, servletContext ), servletContext ) != null )
            {
                String modulePrefix = RequestUtils.getModuleName( request, servletContext );
                moduleConfig = InternalUtils.selectModule( modulePrefix, request, servletContext );
            }
            
            String servletPath = InternalUtils.getDecodedServletPath( request );
            RequestProcessor rp = moduleConfig != null ? getRequestProcessor( moduleConfig ) : null;
            
            if ( rp != null && moduleCanHandlePath( moduleConfig, rp, servletPath ) )
            {
                rp.process( request, response );
            }
            else
            {
                //
                // Initialize the ServletContext in the request.  Often, we need access to the ServletContext when we only

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                                             ModuleConfig modConfig) {


        if (log.isDebugEnabled()) {
            log.debug("Configuring RequestProcessor instance");
        }
        RequestProcessor processor = new FacesRequestProcessor();
        try {
            processor.init(servlet, modConfig);
            servlet.getServletContext().setAttribute
                (Globals.REQUEST_PROCESSOR_KEY + modConfig.getPrefix(),
                 processor);
        } catch (Exception e) {
            log.error("createProcessor()", e);

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                request.getAttribute(Globals.MODULE_KEY);
            if (log.isTraceEnabled()) {
                log.trace("Assigned to module with prefix '" +
                          moduleConfig.getPrefix() + "'");
            }
            RequestProcessor processor =
                getRequestProcessor(moduleConfig, servletContext);
            if (log.isTraceEnabled()) {
                log.trace("Invoking request processor instance " + processor);
            }
            processor.process(request, response);
            context.responseComplete();
        } catch (Exception e) {
            log.error("Exception processing action event " + event, e);
        } finally {
            request.removeAttribute(Constants.ACTION_EVENT_KEY);

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     */
    protected RequestProcessor getRequestProcessor(ModuleConfig config,
                                                   ServletContext context) {
            
        String key = Globals.REQUEST_PROCESSOR_KEY + config.getPrefix();
        RequestProcessor processor =
            (RequestProcessor) context.getAttribute(key);
            
        if (processor == null) {
            try {
                if (log.isDebugEnabled()) {
                    log.debug("Instantiating RequestProcessor of class " +
                              config.getControllerConfig().getProcessorClass());
                }
                ActionServlet servlet = (ActionServlet)
                context.getAttribute(Globals.ACTION_SERVLET_KEY);
                processor =
                    (RequestProcessor) RequestUtils.applicationInstance(
                        config.getControllerConfig().getProcessorClass());
                processor.init(servlet, config);
                context.setAttribute(key, processor);
            } catch (Exception e) {
                log.error("Cannot instantiate RequestProcessor of class "
                          + config.getControllerConfig().getProcessorClass(),
                          e);

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                request.getAttribute(Globals.MODULE_KEY);
            if (log.isTraceEnabled()) {
                log.trace("Assigned to module with prefix '" +
                          moduleConfig.getPrefix() + "'");
            }
            RequestProcessor processor = (RequestProcessor)
                servletContext.getAttribute
                (Globals.REQUEST_PROCESSOR_KEY + moduleConfig.getPrefix());
            if (log.isTraceEnabled()) {
                log.trace("Invoking request processor instance " + processor);
            }
            processor.process(request, response);
        } catch (Exception e) {
            log.error("Exception processing action event " + event, e);
        } finally {
            request.removeAttribute(Constants.ACTION_EVENT_KEY);
        }

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            HttpServletResponse response = (HttpServletResponse)
                context.getServletResponse();
            RequestUtils.selectApplication(request, servletContext);
            ModuleConfig modConfig = (ModuleConfig)
                request.getAttribute(Action.APPLICATION_KEY);
            RequestProcessor processor = (RequestProcessor)
                servletContext.getAttribute
                (Action.REQUEST_PROCESSOR_KEY + modConfig.getPrefix());
            if (log.isTraceEnabled()) {
                log.trace("Invoking request processor instance " + processor);
            }
            processor.process(request, response);
        } catch (Exception e) {
            log.error("Exception processing form event " + event, e);
        }


        // Remove the FormEvent request attribute

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                                             ModuleConfig modConfig) {


        if (log.isDebugEnabled()) {
            log.debug("Configuring RequestProcessor instance");
        }
        RequestProcessor processor = new FacesRequestProcessor();
        try {
            processor.init(servlet, modConfig);
            servlet.getServletContext().setAttribute
                (Action.REQUEST_PROCESSOR_KEY + modConfig.getPrefix(),
                 processor);
        } catch (Exception e) {
            log.error("createProcessor()", e);

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                request.getAttribute(Globals.MODULE_KEY);
            if (log.isTraceEnabled()) {
                log.trace("Assigned to module with prefix '" +
                          moduleConfig.getPrefix() + "'");
            }
            RequestProcessor processor =
                getRequestProcessor(moduleConfig, servletContext);
            if (log.isTraceEnabled()) {
                log.trace("Invoking request processor instance " + processor);
            }
            processor.process(request, response);
            context.responseComplete();
        } catch (Exception e) {
            log.error("Exception processing action event " + event, e);
        } finally {
            request.removeAttribute(Constants.ACTION_EVENT_KEY);

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     */
    protected RequestProcessor getRequestProcessor(ModuleConfig config,
                                                   ServletContext context) {


        String key = Globals.REQUEST_PROCESSOR_KEY + config.getPrefix();
        RequestProcessor processor =
            (RequestProcessor) context.getAttribute(key);


        if (processor == null) {
            try {
                if (log.isDebugEnabled()) {
                    log.debug("Instantiating RequestProcessor of class " +
                              config.getControllerConfig().getProcessorClass());
                }
                ActionServlet servlet = (ActionServlet)
                context.getAttribute(Globals.ACTION_SERVLET_KEY);
                processor =
                    (RequestProcessor) RequestUtils.applicationInstance(
                        config.getControllerConfig().getProcessorClass());
                processor.init(servlet, config);
                context.setAttribute(key, processor);
            } catch (Exception e) {
                log.error("Cannot instantiate RequestProcessor of class "
                          + config.getControllerConfig().getProcessorClass(),
                          e);

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