Examples of com.linkedin.helix.controller.GenericHelixController

com.linkedin.helix.controller.GenericHelixController

Cluster Controllers main goal is to keep the cluster state as close as possible to Ideal State. It does this by listening to changes in cluster state and scheduling new tasks to get cluster state to best possible ideal state. Every instance of this class can control can control only one cluster Get all the partitions use IdealState, CurrentState and Messages
foreach partition
1. get the (instance,state) from IdealState, CurrentState and PendingMessages
2. compute best possible state (instance,state) pair. This needs previous step data and state model constraints
3. compute the messages/tasks needed to move to 1 to 2
4. select the messages that can be sent, needs messages and state model constraints
5. send messages

                                                         _fileStore);


    }


    // start cluster manager controller
    GenericHelixController controller = new GenericHelixController();
    try
    {
      // manager.addConfigChangeListener(controller);
      _manager.addLiveInstanceChangeListener(controller);
      _manager.addIdealStateChangeListener(controller);

Examples of com.linkedin.helix.controller.GenericHelixController

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