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) $

    }
    
    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);

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        while ((sso == null) && (parent != null)) {
            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];
                    break;
                }

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        /*
         * First check to see if there is a custom mapping for the login
         * method. If so, use it. Otherwise, check if there is a mapping in
         * org/apache/catalina/startup/Authenticators.properties.
         */
        Valve authenticator = null;
        if (customAuthenticators != null) {
            authenticator = (Valve)
                customAuthenticators.get(loginConfig.getAuthMethod());
        }
        if (authenticator == null) {

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        // Dump the contents of this pipeline if requested
        if ((log.isDebugEnabled()) && (context instanceof ContainerBase)) {
            log.debug("Pipeline Configuration:");
            Pipeline pipeline = ((ContainerBase) context).getPipeline();
            Valve valves[] = null;
            if (pipeline != null)
                valves = pipeline.getValves();
            if (valves != null) {
                for (int i = 0; i < valves.length; i++) {
                    log.debug("  " + valves[i].getInfo());

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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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        // Set error report valve
        if ((errorReportValveClass != null)
            && (!errorReportValveClass.equals(""))) {
            try {
                Valve valve = (Valve) Class.forName(errorReportValveClass)
                    .newInstance();
                addValve(valve);
            } catch (Throwable t) {
                log.error(sm.getString
                    ("standardHost.invalidErrorReportValveClass",

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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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                realm.backgroundProcess();
            } catch (Exception e) {
                log.warn(sm.getString("containerBase.backgroundProcess.realm", realm), e);                
            }
        }
        Valve current = pipeline.getFirst();
        while (current != null) {
            try {
                current.backgroundProcess();
            } catch (Exception e) {
                log.warn(sm.getString("containerBase.backgroundProcess.valve", current), e);                
            }
            current = current.getNext();
        }
        fireLifecycleEvent(Lifecycle.PERIODIC_EVENT, null);
    }

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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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        // 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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