Examples of org.apache.catalina.Manager

org.apache.catalina.Manager
A Manager manages the pool of Sessions that are associated with a particular Container. Different Manager implementations may support value-added features such as the persistent storage of session data, as well as migrating sessions for distributable web applications.
In order for a Manager implementation to successfully operate with a Context implementation that implements reloading, it must obey the following constraints:
- Must implement Lifecycle so that the Context can indicate that a restart is required.
- Must allow a call to stop() to be followed by a call to start() on the same Manager instance.
@author Craig R. McClanahan @version $Revision: 1.12 $ $Date: 2004/08/16 09:31:07 $

     * 
     * @param request current request
     * @return return jvmRoute from ManagerBase or null
     */
    protected String getLocalJvmRoute(Request request) {
        Manager manager = getManager(request);
        if(manager instanceof ManagerBase)
            return ((ManagerBase) manager).getJvmRoute();
        return null ;
    }

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     * 
     * @param request current request
     * @return manager or null
     */
    protected Manager getManager(Request request) {
        Manager manager = request.getContext().getManager();
        if (log.isDebugEnabled()) {
            if(manager != null)
                log.debug(sm.getString("jvmRoute.foundManager", manager,  request.getContext().getName()));
            else 
                log.debug(sm.getString("jvmRoute.notFoundManager", manager,  request.getContext().getName()));

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        CatalinaCluster cluster = ctx.getCluster();
        if (cluster != null)
            this.setCluster(cluster);


        Manager manager = ctx.getManager();
        if (manager != null)
            this.setManager(manager);


        pipelineInitialized = true;
        this.webServiceMap = ctx.getWebServices();

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        if (requestedSessionId == null)
            return (false);
        if (context == null)
            return (false);
        Manager manager = context.getManager();
        if (manager == null)
            return (false);
        Session session = null;
        try {
            session = manager.findSession(requestedSessionId);
        } catch (IOException e) {
            session = null;
        }
        if ((session != null) && session.isValid())
            return (true);

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            session = null;
        if (session != null)
            return (session.getSession());


        // Return the requested session if it exists and is valid
        Manager manager = null;
        if (context != null)
            manager = context.getManager();
        if (manager == null)
            return (null);      // Sessions are not supported
        if (requestedSessionId != null) {
            try {
                session = manager.findSession(requestedSessionId);
            } catch (IOException e) {
                session = null;
            }
            if ((session != null) && !session.isValid())
                session = null;
            if (session != null) {
                session.access();
                return (session.getSession());
            }
        }


        // Create a new session if requested and the response is not committed
        if (!create)
            return (null);
        if ((context != null) && (response != null) &&
            context.getCookies() &&
            response.getResponse().isCommitted()) {
            throw new IllegalStateException
              (sm.getString("coyoteRequest.sessionCreateCommitted"));
        }


        session = manager.createSession();


        // Creating a new session cookie based on that session
        if ((session != null) && (getContext() != null)
               && getContext().getCookies()) {
            Cookie cookie = new Cookie(Globals.SESSION_COOKIE_NAME,

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                    logger.error("can't find '" + sessionManager + "', StandardManager will be used", e);
                }
            }


            try {
                final Manager mgr = (Manager) sessionManagerClass.newInstance();
                standardContext.setManager(mgr);
            } catch (Exception e) {
                logger.error("can't instantiate '" + sessionManager + "', StandardManager will be used", e);
            }
        }

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     * @param manager The newly associated Manager
     */
    public synchronized void setManager(Manager manager) {


        // Change components if necessary
        Manager oldManager = this.manager;
        if (oldManager == manager)
            return;
        this.manager = manager;


        // Stop the old component if necessary

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        if (requestedSessionId == null)
            return (false);
        if (context == null)
            return (false);
        Manager manager = context.getManager();
        if (manager == null)
            return (false);
        Session session = null;
        try {
            session = manager.findSession(requestedSessionId);
        } catch (IOException e) {
            session = null;
        }
        if ((session != null) && session.isValid())
            return (true);

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            session = null;
        if (session != null)
            return (session);


        // Return the requested session if it exists and is valid
        Manager manager = null;
        if (context != null)
            manager = context.getManager();
        if (manager == null)
            return (null);      // Sessions are not supported
        if (requestedSessionId != null) {
            try {
                session = manager.findSession(requestedSessionId);
            } catch (IOException e) {
                session = null;
            }
            if ((session != null) && !session.isValid())
                session = null;
            if (session != null) {
                session.access();
                return (session);
            }
        }


        // Create a new session if requested and the response is not committed
        if (!create)
            return (null);
        if ((context != null) && (response != null) &&
            context.getCookies() &&
            response.getResponse().isCommitted()) {
            throw new IllegalStateException
              (sm.getString("coyoteRequest.sessionCreateCommitted"));
        }


        // Attempt to reuse session id if one was submitted in a cookie
        // Do not reuse the session id if it is from a URL, to prevent possible
        // phishing attacks
        if (connector.getEmptySessionPath() 
                && isRequestedSessionIdFromCookie()) {
            session = manager.createSession(getRequestedSessionId());
        } else {
            session = manager.createSession(null);
        }


        // Creating a new session cookie based on that session
        if ((session != null) && (getContext() != null)
               && getContext().getCookies()) {

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        if (requestedSessionId == null)
            return (false);
        if (context == null)
            return (false);
        Manager manager = context.getManager();
        if (manager == null)
            return (false);
        Session session = null;
        try {
            session = manager.findSession(requestedSessionId);
        } catch (IOException e) {
            session = null;
        }
        if ((session != null) && session.isValid())
            return (true);

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