Answers to: Detect a user session is closing because of timeout

Answer by nhuuduong

nhuuduong — Tue, 14 Aug 2018 05:41:13 -0400

This is my implementation:

@ManagedBean
@SessionScoped
public class MySesssionBean {
    @PreDestroy
    public void destroy() {
        Ivy.log().fatal("Hi there");
        }
}

But we still got the error: Caused by: ch.ivyteam.ivy.environment.EnvironmentNotAvailableException: Access to ivy environment outside a process request thread is not possible.

Current thread: Thread[ContainerBackgroundProcessor[StandardEngine[ivy]],6,main] at ch.ivyteam.ivy.environment.Ivy.getIvy(Ivy.java:577) at ch.ivyteam.ivy.environment.Ivy.getEnvironmentData(Ivy.java:556) at ch.ivyteam.ivy.environment.Ivy.getEnvironmentData(Ivy.java:551) at ch.ivyteam.ivy.environment.Ivy.log(Ivy.java:413)

We can't get any ivy environment here :(

Answer by Jailson Brito

Jailson Brito — Thu, 09 Mar 2017 05:14:11 -0500

Following your recommendation, I am registering my Session extension with a 'Program Start', it's properly detecting when the session is destroyed, and then my StartEventBean calls fireProcessStartEventRequest(). The 'Program Start' is being triggered but it's failing on the way to a "Login Dialog". Any ideas of what I am missing?

All I need is to redirect to my "Login Dialog" on a session timeout.

The error message:

OutOfScopeException: Cannot access scoped [ch.ivyteam.ivy.dialog.execution.DialogRuntimeManager]. Either we are not currently inside an HTTP Servlet request, or you may have forgotten to apply com.google.inject.servlet.GuiceFilter as a servlet filter for this request.
ProvisionException: Unable to provision, see the following errors:

1) Error in custom provider, com.google.inject.OutOfScopeException: Cannot access scoped [ch.ivyteam.ivy.dialog.execution.DialogRuntimeManager]. Either we are not currently inside an HTTP Servlet request, or you may have forgotten to apply com.google.inject.servlet.GuiceFilter as a servlet filter for this request.
  at ch.ivyteam.ivy.dialog.execution.DialogRuntimeManager.class(DialogRuntimeManager.java:30)
  while locating ch.ivyteam.ivy.dialog.execution.DialogRuntimeManager

1 error
BpmError: ivy:error:system
RequestException: ivy:error:system
Process Start Event Bean SessionWatcher [class=ch.ivyteam.wf.session.SessionWatcherStartEventBean, path=13EACA2A989BCC3D/eventLink.ivp] fire has been failed

Thanks in advance!

Answer by Reguel Wermelinger

Reguel Wermelinger — Fri, 03 Mar 2017 09:33:30 -0500

it's not public API therefore there is no documentation for it. But the simple methods of theses interfaces should speak for themselves. Anyway here is a simple implementation:

package ch.ivyteam.sample;

import ch.ivyteam.di.restricted.DiCore;
import ch.ivyteam.ivy.persistence.IPersistentTransaction;
import ch.ivyteam.ivy.persistence.PersistencyException;
import ch.ivyteam.ivy.security.ISecurityManager;
import ch.ivyteam.ivy.security.ISession;
import ch.ivyteam.ivy.security.ISessionExtension;

public class MyDemoSessionExtension implements ISessionExtension 
{

    public static void install()
    {
        DiCore.getGlobalInjector().getInstance(ISecurityManager.class)
           .addSessionExtension(new MyDemoSessionExtension());
    }

    @Override
    public void createSession(ISession session, IPersistentTransaction transaction)
            throws PersistencyException {
        System.err.println("created session "+session);
    }

    @Override
    public void destroySession(ISession session, IPersistentTransaction transaction)
            throws PersistencyException {
        System.err.println("session destroyed "+session);
    }

    @Override
    public void logoutSession(ISession session, IPersistentTransaction transaction,
            long currentTaskId) throws PersistencyException {
        System.err.println("session logout "+session);
    }

}

The easiest way to register this Session extension is with a 'Program Start' event bean that runs when the server is up and running.

Answer by Reguel Wermelinger

Reguel Wermelinger — Mon, 15 Jun 2015 10:44:50 -0400

I did not test it: but I think that the ISessionExtension can do that job.

See: ch.ivyteam.ivy.security.ISessionExtension.destroySession(ISession, IPersistentTransaction)

And to register your extension: ch.ivyteam.ivy.security.ISecurityManager.addSessionExtension(ISessionExtension)