[Task Assignment] Bulk Delegation Operation

PlanningTask {
   private long taskId;
   private String assignedUser;
   private int index;
   private short published;
}

BulkDelegationItem {
    private long taskId;
    private String targetUserId;
    private int index;
    private short published;	
}

bulkDelegate(String containerId, String userId, List<BulkDelegationItem> delegationItems);

BEGIN TRANSACTION
	for (BulkDelegationItem item : delegationItems) {
		delegate(containerId, userId, item.getTargetUserId());
		saveOrUpdate(new PlanningTask(item.getTaskId(), 
                                                  item.getTargetUserId(), 
                                                  item.getIndex(), 
                                                  item.getPublished());                		
	}
COMMIT;

BulkDelegationItem {
	private long taskId;
	private String targetUserId;	
	/*
          Have the ability to pass a "command" that will be executed as part of the delegation for each item.
          This command has access to an object e.g. TaskInfo that let us know information about the task is about to be delegated. e.g: 
              taskInfo.getActualOwner() //what's the current owner of the task that it's about to be delegated
              taskInfo.getStatus()      //what's the current status of the task that it's about to be delegated, e.g. Ready, Reserved etc.		
                     
         And finally have access to the entity manager for doing the necessary updates in the PlanningTask.
          In this way the command can decide the necessary update or might even throw an  exception and make the bulk operation rollback if necessary.		
	*/
	ParametrizedCommand<{TaskInfo, EntityManager}> command; /* command executed as part of the delegation */
}

BEGIN TRANSACTION
	for (BulkDelegationItem item : delegationItems) {
		TaskInfo taskInfo = /* create the taskInfo for the task that is about to be delegated */	
		EntityManager em =  /* get the reference to the EntityManager */
		delegate(containerId, userId, item.getTargetUserId()); 
		item.getCommand().execute(taskInfo, em); /* let the command do the necessary updates */
	}
COMMIT;  /* if any of the task delegations fails or the commands fails all the updates are rolledback */