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 $

    }


    private Session createAndUseSession(DistributableSessionManager<?> manager, String id, boolean canCreate, boolean access)
            throws Exception {
        // Shift to Manager interface when we simulate Tomcat
        Manager mgr = manager;
        Session sess = mgr.findSession(id);
        assertNull("session does not exist", sess);
        try {
            sess = mgr.createSession(id, new Random());
            if (!canCreate)
                fail("Could not create session" + id);
        } catch (IllegalStateException ise) {
            if (canCreate) {
                log.error("Failed to create session " + id, ise);

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               SecurityAssociationActions.pushRunAsIdentity(runAsIdentity); 
            }
            userPrincipal.set(caller);


            // If there is a session, get the tomcat session for the principal
            Manager manager = container.getManager();
            if (manager != null && hsession != null)
            {
               try
               {
                  session = manager.findSession(hsession.getId());
               }
               catch (IOException ignore)
               {
               }
            }

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               SecurityAssociationActions.pushRunAsIdentity(runAsIdentity); 
            }
            userPrincipal.set(caller);
            
            // If there is a session, get the tomcat session for the principal
            Manager manager = container.getManager();
            if (manager != null && hsession != null)
            {
               try
               {
                  session = manager.findSession(hsession.getId());
               }
               catch (IOException ignore)
               {
               }
            }

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    private Session createAndUseSession(DistributableSessionManager<?> manager, String id, boolean canCreate, boolean access)
            throws Exception {
        
        // Shift to Manager interface when we simulate Tomcat
        Manager mgr = manager;
        Session sess = mgr.findSession(id);
        assertNull("session does not exist", sess);
        try {
            sess = mgr.createSession(id, new Random());
            if (!canCreate)
                fail("Could not create session" + id);
        } catch (IllegalStateException ise) {
            if (canCreate) {
                ise.printStackTrace(System.err);

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        return sess;
    }


    private void useSession(DistributableSessionManager<?> manager, String id) throws Exception {
        // Shift to Manager interface when we simulate Tomcat
        Manager mgr = manager;
        Session sess = mgr.findSession(id);
        assertNotNull("session exists", sess);


        sess.access();
        sess.getSession().setAttribute("test", "test");

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    }


    @Override
    protected Session doGetSession(boolean create) {
        if (session == null) {
            Manager manager = getContext().getManager();
            if (requestedSessionId != null) {
                try {
                    session = manager.findSession(requestedSessionId);
                } catch (IOException e) {
                    session = null;
                }
            }


            if (session == null && create) {
                session = manager.createSession(requestedSessionId, new Random());
            }


            if (session != null) {
                session.access();
            }

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   private boolean isManagerStopped(Session session)
   {
      boolean stopped = false;
      
      Manager manager = session.getManager();
      
      if (manager instanceof ManagerBase)
      {
         ObjectName mgrName = ((ManagerBase)manager).getObjectName();
         stopped = (!activeManagers.contains(mgrName));

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      }


      // If we made a change, track the manager and notify any cluster
      if (added)
      {
         Manager manager = session.getManager();
         
         // Prefer to cache an ObjectName to avoid risk of leaking a manager,
         // so if the manager exposes one, use it
         Object mgrKey = null;
         if (manager instanceof ManagerBase)

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            reverse.put(session, ssoId);
        }


        // If we made a change, track the manager and notify any cluster
        if (added) {
            Manager manager = session.getManager();


            if (activeManagers.add(manager)) {
                ((Lifecycle) manager).addLifecycleListener(this);
            }

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                // Notify our interested LifecycleListeners
                lifecycle.fireLifecycleEvent(START_EVENT, null);
                
                // Acquire clustered manager
                Manager contextManager = null;
                if (manager == null) {
                    if ( (getCluster() != null) && distributable) {
                        try {
                            contextManager = getCluster().createManager(getName());
                        } catch (Exception ex) {

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