Online users counter

[iceall]

Hello!

What would be the way to create a counter of current portal users online?

In case of servlets/jsps I could extend HttpSessionListener that counts current active sessions but what can be done in case of portlets?

[trong.tran]

Counting users online would not be done in portlet and I also don't think it's possible. The portlet is just for presenting in this case.

The good way is to create two listeners which extends from org.exoplatform.services.listener.Listener<ConversationRegistry, ConversationState>, then register them to ConvesationRegistry service with name "exo.core.security.ConversationRegistry.register" and "exo.core.security.ConversationRegistry.unregister". These two listeners will be triggered whenever user log-in and log-out from Portal correspondingly.

For example, let's say you have :

public class LoginListener extends Listener<ConversationRegistry, ConversationState> {

  public LoginListener() throws Exception {
  }

  @Override
  public void onEvent(Event<ConversationRegistry, ConversationState> event) throws Exception {
    // save user logged-in somehow
  }

and

public class LogoutListener extends Listener<ConversationRegistry, ConversationState> {

  public LogoutListener() throws Exception {
  }

  @Override
  public void onEvent(Event<ConversationRegistry, ConversationState> event) throws Exception {
    // remove user logged-out
  }

You would register them by configuration like following :

  <external-component-plugins>
    <target-component>org.exoplatform.services.listener.ListenerService</target-component>
    <component-plugin>
      <name>exo.core.security.ConversationRegistry.register</name>
      <set-method>addListener</set-method>
      <type>LoginListener</type>
      <description>increase number of online users</description>      
    </component-plugin>       
    <component-plugin>
      <name>exo.core.security.ConversationRegistry.unregister</name>
      <set-method>addListener</set-method>
      <type>LogoutListener</type>
      <description>decrease number of online users</description>      
    </component-plugin>       
  </external-component-plugins>

[iceall]

Thanks!