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StandardContextValve.javaAPI DocApache Tomcat 6.0.1411171Fri Jul 20 04:20:32 BST 2007org.apache.catalina.core

StandardContextValve

public final class StandardContextValve extends org.apache.catalina.valves.ValveBase
Valve that implements the default basic behavior for the StandardContext container implementation.

USAGE CONSTRAINT: This implementation is likely to be useful only when processing HTTP requests.

author
Craig R. McClanahan
version
$Revision: 467222 $ $Date: 2006-10-24 05:17:11 +0200 (mar., 24 oct. 2006) $

Fields Summary
private static final String
info
The descriptive information related to this implementation.
private static final org.apache.catalina.util.StringManager
sm
The string manager for this package.
private StandardContext
context
Constructors Summary
Methods Summary
public final voidevent(org.apache.catalina.connector.Request request, org.apache.catalina.connector.Response response, org.apache.catalina.CometEvent event)
Select the appropriate child Wrapper to process this request, based on the specified request URI. If no matching Wrapper can be found, return an appropriate HTTP error.

param
request Request to be processed
param
response Response to be produced
param
valveContext Valve context used to forward to the next Valve
exception
IOException if an input/output error occurred
exception
ServletException if a servlet error occurred


        // Select the Wrapper to be used for this Request
        Wrapper wrapper = request.getWrapper();

        // Normal request processing
        // FIXME: This could be an addition to the core API too
        /*
        Object instances[] = context.getApplicationEventListeners();

        ServletRequestEvent event = null;

        if ((instances != null) 
                && (instances.length > 0)) {
            event = new ServletRequestEvent
                (((StandardContext) container).getServletContext(), 
                 request.getRequest());
            // create pre-service event
            for (int i = 0; i < instances.length; i++) {
                if (instances[i] == null)
                    continue;
                if (!(instances[i] instanceof ServletRequestListener))
                    continue;
                ServletRequestListener listener =
                    (ServletRequestListener) instances[i];
                try {
                    listener.requestInitialized(event);
                } catch (Throwable t) {
                    container.getLogger().error(sm.getString("requestListenerValve.requestInit",
                                     instances[i].getClass().getName()), t);
                    ServletRequest sreq = request.getRequest();
                    sreq.setAttribute(Globals.EXCEPTION_ATTR,t);
                    return;
                }
            }
        }
        */

        wrapper.getPipeline().getFirst().event(request, response, event);

        /*
        if ((instances !=null ) &&
                (instances.length > 0)) {
            // create post-service event
            for (int i = 0; i < instances.length; i++) {
                if (instances[i] == null)
                    continue;
                if (!(instances[i] instanceof ServletRequestListener))
                    continue;
                ServletRequestListener listener =
                    (ServletRequestListener) instances[i];
                try {
                    listener.requestDestroyed(event);
                } catch (Throwable t) {
                    container.getLogger().error(sm.getString("requestListenerValve.requestDestroy",
                                     instances[i].getClass().getName()), t);
                    ServletRequest sreq = request.getRequest();
                    sreq.setAttribute(Globals.EXCEPTION_ATTR,t);
                }
            }
        }
        */
public java.lang.StringgetInfo()
Return descriptive information about this Valve implementation.

    

    // ------------------------------------------------------------- Properties


                
       

        return (info);
public final voidinvoke(org.apache.catalina.connector.Request request, org.apache.catalina.connector.Response response)
Select the appropriate child Wrapper to process this request, based on the specified request URI. If no matching Wrapper can be found, return an appropriate HTTP error.

param
request Request to be processed
param
response Response to be produced
param
valveContext Valve context used to forward to the next Valve
exception
IOException if an input/output error occurred
exception
ServletException if a servlet error occurred


        // Disallow any direct access to resources under WEB-INF or META-INF
        MessageBytes requestPathMB = request.getRequestPathMB();
        if ((requestPathMB.startsWithIgnoreCase("/META-INF/", 0))
            || (requestPathMB.equalsIgnoreCase("/META-INF"))
            || (requestPathMB.startsWithIgnoreCase("/WEB-INF/", 0))
            || (requestPathMB.equalsIgnoreCase("/WEB-INF"))) {
            String requestURI = request.getDecodedRequestURI();
            notFound(requestURI, response);
            return;
        }

        // Wait if we are reloading
        while (context.getPaused()) {
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                ;
            }
        }

        // Select the Wrapper to be used for this Request
        Wrapper wrapper = request.getWrapper();
        if (wrapper == null) {
            String requestURI = request.getDecodedRequestURI();
            notFound(requestURI, response);
            return;
        }

        // Normal request processing
        Object instances[] = context.getApplicationEventListeners();

        ServletRequestEvent event = null;

        if ((instances != null) 
                && (instances.length > 0)) {
            event = new ServletRequestEvent
                (((StandardContext) container).getServletContext(), 
                 request.getRequest());
            // create pre-service event
            for (int i = 0; i < instances.length; i++) {
                if (instances[i] == null)
                    continue;
                if (!(instances[i] instanceof ServletRequestListener))
                    continue;
                ServletRequestListener listener =
                    (ServletRequestListener) instances[i];
                try {
                    listener.requestInitialized(event);
                } catch (Throwable t) {
                    container.getLogger().error(sm.getString("standardContext.requestListener.requestInit",
                                     instances[i].getClass().getName()), t);
                    ServletRequest sreq = request.getRequest();
                    sreq.setAttribute(Globals.EXCEPTION_ATTR,t);
                    return;
                }
            }
        }

        wrapper.getPipeline().getFirst().invoke(request, response);

        if ((instances !=null ) &&
                (instances.length > 0)) {
            // create post-service event
            for (int i = 0; i < instances.length; i++) {
                if (instances[i] == null)
                    continue;
                if (!(instances[i] instanceof ServletRequestListener))
                    continue;
                ServletRequestListener listener =
                    (ServletRequestListener) instances[i];
                try {
                    listener.requestDestroyed(event);
                } catch (Throwable t) {
                    container.getLogger().error(sm.getString("standardContext.requestListener.requestDestroy",
                                     instances[i].getClass().getName()), t);
                    ServletRequest sreq = request.getRequest();
                    sreq.setAttribute(Globals.EXCEPTION_ATTR,t);
                }
            }
        }
private voidnotFound(java.lang.String requestURI, javax.servlet.http.HttpServletResponse response)
Report a "not found" error for the specified resource. FIXME: We should really be using the error reporting settings for this web application, but currently that code runs at the wrapper level rather than the context level.

param
requestURI The request URI for the requested resource
param
response The response we are creating


        try {
            response.sendError(HttpServletResponse.SC_NOT_FOUND, requestURI);
        } catch (IllegalStateException e) {
            ;
        } catch (IOException e) {
            ;
        }
public voidsetContainer(org.apache.catalina.Container container)
Cast to a StandardContext right away, as it will be needed later.

see
org.apache.catalina.Contained#setContainer(org.apache.catalina.Container)

        super.setContainer(container);
        context = (StandardContext) container;