org.ametiste.routine.mod.dispenser.application.service

Class DefaultOperationReservationService

java.lang.Object

org.ametiste.routine.mod.dispenser.application.service.DefaultOperationReservationService

All Implemented Interfaces:

OperationReservationService

public class DefaultOperationReservationService
extends java.lang.Object
implements OperationReservationService

Basic implementation of the OperationReservationService which implemented using core TaskRepository service to find and save reserved operations.

Service implementation provides ability to restrict count of tasks that could be reserved by one request.

NOTE: this is very simple implementation, its count each task as single operation, it means if the task constains more then one operation - all operations of a task will be reserved as single reservation.
So, this implementation may be used only in the environments where tasks has single operation, or where all tasks has same amout of operations. In the environments where tasks has broad structure it was hard to predict reservation density.
To constraint this behaviour, task-related constraint may be used, this constaint should match operations count within the task, and allow to reserve only tasks which has only one operation included.

TODO: Another implementation which would allow to reserve only requested number of operations.
TODO: To support this feature, the domain should allow to launch tasks partialy,
TODO: atm all operations of the tasks become 'PENDING' after Task.prepareExecution() trace.

TODO: Also, total amount of reserved tasks could be limited. [ Constraint ]

TODO: add task-related constraints, which would allow to setup constraints to check tasks consitensy

Since:

0.0.1

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_RESERVATION_LIMIT

Constructor Summary

Constructors

Constructor and Description
DefaultOperationReservationService(org.ametiste.routine.domain.task.TaskRepository taskRepository)
DefaultOperationReservationService(org.ametiste.routine.domain.task.TaskRepository taskRepository, int reservationLimit)

Method Summary

Modifier and Type	Method and Description
java.util.List<org.ametiste.routine.domain.task.ExecutionLine>	reserveOperationsExecution(int reservationCount) Reserv the number of 'NEW' task's operations for next termination, provides information about operations reserved.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT_RESERVATION_LIMIT

public static final int DEFAULT_RESERVATION_LIMIT

See Also:

Constant Field Values

Constructor Detail

DefaultOperationReservationService

public DefaultOperationReservationService(org.ametiste.routine.domain.task.TaskRepository taskRepository)

DefaultOperationReservationService

public DefaultOperationReservationService(org.ametiste.routine.domain.task.TaskRepository taskRepository,
                                          int reservationLimit)

Method Detail

reserveOperationsExecution

@Transactional
public java.util.List<org.ametiste.routine.domain.task.ExecutionLine> reserveOperationsExecution(int reservationCount)

Description copied from interface: OperationReservationService

Reserv the number of 'NEW' task's operations for next termination, provides information about operations reserved.

Note, if the service can't find enough operations to reserv, available amount would be reserved.

For example, if only 5 'NEW' opertions are available, and requested reservation count is 7, only 5 operations will be reserved.

If there is 0 of 'NEW' operations, nothing will be reserved.

Specified by:

reserveOperationsExecution in interface OperationReservationService

Parameters:

reservationCount - maximu reservated operations count

Returns:

list of termination lines of operations that was reserved