package jalview.api;

public interface AlignCalcManagerI
{

  
  /**
   * tell manager that a worker is initialised and has started to run
   * @param worker
   */
  void notifyStart(AlignCalcWorkerI worker);

  /**
   * check if a calculation of this type is already active
   * @param worker
   * @return
   */
  boolean alreadyDoing(AlignCalcWorkerI worker);

  /**
   * tell manager that worker is now processing data
   * @param worker
   */
  boolean notifyWorking(AlignCalcWorkerI worker);


  /**
   * notify manager that the worker has completed, and results may be ready to collect
   * @param worker
   */
  void workerComplete(AlignCalcWorkerI worker);

  /**
   * indicate that a worker like this cannot run on the platform and shouldn't be started again
   * @param worker
   */
  void workerCannotRun(AlignCalcWorkerI worker);

  /**
   * launch a new worker
   * @param worker
   */
  void startWorker(AlignCalcWorkerI worker);

  /**
   * 
   * @param worker
   * @return
   */
  boolean isWorking(AlignCalcWorkerI worker);

  /**
   * if any worker thread is operational, return true!
   * @return
   */
  boolean isWorking();

}