Examples of com.linkedin.helix.HelixManager.removeListener()

com.linkedin.helix.HelixManager.removeListener()
Removes the listener. If the same listener was used for multiple changes, all change notifications will be removed.
This will invoke onChange method on the listener with NotificationContext.type set to FINALIZE. Listener can clean up its state.
The data provided in this callback may not be reliable.
When a session expires all listeners will be removed and re-added automatically.
This provides the ability for listeners to either reset their state or do any cleanup tasks.
@param listener @return

    if (lastSessions != null) {
      for (String session : lastSessions.keySet()) {
        if (!curSessions.containsKey(session)) {
          // remove current-state listener for expired session
            String instanceName = lastSessions.get(session).getInstanceName();
          manager.removeListener(keyBuilder.currentStates(instanceName, session), this); 
        }
      }
    }
    
    if (lastInstances != null) {

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    if (lastInstances != null) {
      for (String instance : lastInstances.keySet()) {
        if (!curInstances.containsKey(instance)) {
          // remove message listener for disconnected instances
          manager.removeListener(keyBuilder.messages(instance), this);
        }
      }
    }
    
  for (String session : curSessions.keySet()) {

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  @Transition(to="STANDBY",from="LEADER")
  public void onBecomeStandbyFromLeader(Message message, NotificationContext context)
  {
    LOG.info("Become STANDBY from LEADER");
    HelixManager manager = context.getManager();
    manager.removeListener(_particHolder);    
  }


  @Transition(to="OFFLINE",from="STANDBY")
  public void onBecomeOfflineFromStandby(Message message, NotificationContext context)
  {

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    Builder keyBuilder = new Builder(manager.getClusterName());
    for (ChangeType notificationType : _notificationTypes)
    {
      if (notificationType == ChangeType.LIVE_INSTANCE)
      {
        manager.removeListener(keyBuilder.liveInstances(), _particHolder);
      }
      else if (notificationType == ChangeType.CONFIG)
      {
        manager.removeListener(keyBuilder.instanceConfigs(), _particHolder);
      }

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      {
        manager.removeListener(keyBuilder.liveInstances(), _particHolder);
      }
      else if (notificationType == ChangeType.CONFIG)
      {
        manager.removeListener(keyBuilder.instanceConfigs(), _particHolder);
      }
      else if (notificationType == ChangeType.EXTERNAL_VIEW)
      {
        manager.removeListener(keyBuilder.externalViews(), _particHolder);
      }

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      {
        manager.removeListener(keyBuilder.instanceConfigs(), _particHolder);
      }
      else if (notificationType == ChangeType.EXTERNAL_VIEW)
      {
        manager.removeListener(keyBuilder.externalViews(), _particHolder);
      }
      else
      {
        LOG.error("Unsupport notificationType:" + notificationType.toString());
      }

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