订票系统的optaplanner约束设计

Question

我想用optaplanner设计一个预订系统，按照我的商业模式：

Customers (id, name) //Customer table
Services(id, name, description, duration)  //services that a customer can book, duration can be 15min, 30min, ..., N x 15min
Employees(id, name)  //Employee tables
Appointment(id, customerId, employeeId, serviceId, startTime, endTime) 

要预订预约，客户将选择：

null

@Entity
public class Service extends PanacheEntityBase {

    @Id
    @GeneratedValue
    @NotNull
    private Long id;

    @NotBlank
    private String name;
    private int durationInGrains;
}

public class TimeGrain  {

    public static final int GRAIN_LENGTH_IN_MINUTES = 15;

    private int grainIndex; // unique
    private int startingMinuteOfDay;
}


@Entity
public class Employee extends PanacheEntityBase {

    @PlanningId
    @Id
    @GeneratedValue
    @NotNull
    private Long id;

    @NotBlank
    private String name;
}

@Entity
public class Appointment extends PanacheEntityBase {

    @Id
    @GeneratedValue
    @NotNull
    private Long id;

    private Employee employee;
    private Service service;

    private LocalDateTime startTime;
    private LocalDateTime endTime;
}

@PlanningEntity
public class Availability {

    @PlanningVariable(valueRangeProviderRefs = { "timeGrainRange" })
    private TimeGrain startingTimeGrain;
    
    @PlanningVariable(valueRangeProviderRefs = "providerRange")
    private Provider provider;
    
    private Service service;
}

@PlanningSolution
public class AppointmentAvailability {

    @ValueRangeProvider(id = "timeGrainRange")
    @ProblemFactCollectionProperty
    private List<TimeGrain> timeGrainList;

    @ProblemFactCollectionProperty
    @ValueRangeProvider(id = "providerRange")
    private List<Provider> providerList;

    @ProblemFactCollectionProperty
    @ValueRangeProvider(id = "appointmentsRange")
    private List<Appointment> appointmentList;
    
    @PlanningEntityCollectionProperty
    private List<Availability> availabilityList;

    @PlanningScore
    private HardMediumSoftScore score;
}

由于我对optaplanner是个新手，你能告诉我这是不是该走的路吗？

更新1：出于设计目的，我已经将问题简化到最小。

Answer 1

看看optaplanner-examples中的会议调度示例，获得如何建模的启发。请参阅Design Patterns一节中的文档中的Time Grain模式。“学校时间表快速启动”改为采用时隙模式。