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) $

        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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    }


    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);
            } catch (IOException e) {
                if (e.getCause() instanceof LifecycleException) {
                    throw (LifecycleException) e.getCause();
                }

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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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        /*
         * 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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        // Add User Defined Valves
        List valveChain = ctx.getValveChain();
        if (valveChain != null) {
            Iterator iterator = valveChain.iterator();
            while (iterator.hasNext()) {
                Valve valve = (Valve) iterator.next();
                addValve(valve);
            }
        }


//        CatalinaCluster cluster = ctx.getCluster();

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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);
            } catch (IOException e) {
                if (e.getCause() instanceof LifecycleException) {
                    throw (LifecycleException) e.getCause();
                }

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        if( container == null || ! (container instanceof ContainerBase) )
            return null;
        this.containerLog = container.getLogger();
        ContainerBase containerBase=(ContainerBase)container;
        Pipeline pipe=containerBase.getPipeline();
        Valve valves[]=pipe.getValves();


        /* Compute the "parent name" part */
        String parentName="";
        if (container instanceof Engine) {
        } else if (container instanceof Host) {

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        if (context instanceof Authenticator)
            return;
        if (context instanceof ContainerBase) {
            Pipeline pipeline = ((ContainerBase) context).getPipeline();
            if (pipeline != null) {
                Valve basic = pipeline.getBasic();
                if ((basic != null) && (basic instanceof Authenticator))
                    return;
                Valve valves[] = pipeline.getValves();
                for (int i = 0; i < valves.length; i++) {
                    if (valves[i] instanceof Authenticator)
                        return;
                }
            }
        } else {
            return;     // Cannot install a Valve even if it would be needed
        }


        // Has a Realm been configured for us to authenticate against?
        if (context.getRealm() == null) {
            log.error(sm.getString("contextConfig.missingRealm"));
            ok = false;
            return;
        }


        /*
         * 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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