Examples of org.apache.catalina.Valve

org.apache.catalina.Valve

A Valve is a request processing component associated with a particular Container. A series of Valves are generally associated with each other into a Pipeline. The detailed contract for a Valve is included in the description of the invoke() method below.
HISTORICAL NOTE: The "Valve" name was assigned to this concept because a valve is what you use in a real world pipeline to control and/or modify flows through it. @author Craig R. McClanahan @author Gunnar Rjnning @author Peter Donald @version $Revision: 467222 $ $Date: 2006-10-24 05:17:11 +0200 (mar., 24 oct. 2006) $

      threadPool = Executors.newFixedThreadPool(THREADS);
      
      CountDownLatch startingGun = new CountDownLatch(THREADS + 1);
      CountDownLatch finishedSignal = new CountDownLatch(THREADS);
      ConcurrentRequestHandler concurrentHandler = new ConcurrentRequestHandler();
      Valve pipelineHead = SessionTestUtil.setupPipeline(managers[1], concurrentHandler);
      Loader[] loaders = new Loader[THREADS];
      
      for (int i = 0; i < loaders.length; i++)
      {
         loaders[i] = new Loader(pipelineHead, concurrentHandler, managers[1], id1, attrs.keySet(), startingGun, finishedSignal);

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   }
   
   public static void invokeRequest(Manager manager, RequestHandler handler, String sessionId)
      throws ServletException, IOException
   {
      Valve valve = setupPipeline(manager, handler);
      Request request = setupRequest(manager, sessionId);
      invokeRequest(valve, request);
   }

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         if (!(parent instanceof Pipeline))
         {
            parent = parent.getParent();
            continue;
         }
         Valve valves[] = ((Pipeline) parent).getValves();
         for (int i = 0; i < valves.length; i++)
         {
            if (valves[i] instanceof SingleSignOn)
            {
               sso = (SingleSignOn) valves[i];

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                    for (int i=0; !found && i<names.length; i++)
                        if(errorReportValveObjectName.equals(names[i]))
                            found = true ;
                    }
                    if(!found) {            
                        Valve valve = (Valve) Class.forName(errorReportValveClass)
                        .newInstance();
                        addValve(valve);
                        errorReportValveObjectName = ((ValveBase)valve).getObjectName() ;
                    }
            } catch (Throwable t) {

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        }
        
        //Set a UserTransactionBeforeAfter
        interceptor = new UserTransactionBeforeAfter(interceptor, index++, ctx.getUserTransaction());


        Valve clusteredValve = ctx.getClusteredValve();
        if (null != clusteredValve) {
            addValve(clusteredValve);
        }
        
        //Set the BeforeAfters as a valve

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    }
    
    public synchronized void start() throws LifecycleException {
        if (pipelineInitialized) {
            try {
                Valve valve = getFirst();
                valve.invoke(null, null);
                //Install the DefaultSubjectValve after the authentication valve so the default subject is supplied
                //only if no real subject is authenticated.


                Valve defaultSubjectValve = new DefaultSubjectValve(defaultSubject);
                addValve(defaultSubjectValve);


                // if a servlet uses run-as then make sure role desgnates have been provided
                if (hasRunAsServlet()) {
                    if (runAsSource == null) {

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        // Look up the SingleSignOn implementation in our request processing
        // path, if there is one
        Container parent = context.getParent();
        while ((sso == null) && (parent != null)) {
            Valve valves[] = parent.getPipeline().getValves();
            for (int i = 0; i < valves.length; i++) {
                if (valves[i] instanceof SingleSignOn) {
                    sso = (SingleSignOn) valves[i];
                    break;
                }

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        if (this instanceof Authenticator)
            return (Authenticator) this;


        Pipeline pipeline = getPipeline();
        if (pipeline != null) {
            Valve basic = pipeline.getBasic();
            if ((basic != null) && (basic instanceof Authenticator))
                return (Authenticator) basic;
            Valve valves[] = pipeline.getValves();
            for (int i = 0; i < valves.length; i++) {
                if (valves[i] instanceof Authenticator)
                    return (Authenticator) valves[i];
            }
        }

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                        found = true;
                        break;
                    }
                }
                if(!found) {
                    Valve valve =
                        (Valve) Class.forName(errorValve).newInstance();
                    getPipeline().addValve(valve);
                }
            } catch (Throwable t) {
                ExceptionUtils.handleThrowable(t);

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        if (accessLogScanComplete) {
            return accessLog;
        }


        AccessLogAdapter adapter = null;
        Valve valves[] = getPipeline().getValves();
        for (Valve valve : valves) {
            if (valve instanceof AccessLog) {
                if (adapter == null) {
                    adapter = new AccessLogAdapter((AccessLog) valve);
                } else {

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