完善Management领域限界上下文

在完全投入领域事件之前，我们先完善Management领域限界上下文：

package com.lugew.domaindrivendesignwithspringboot.management;
import com.lugew.domaindrivendesignwithspringboot.sharedkernel.Money;
import lombok.Getter;
import lombok.Setter;
import javax.persistence.*;
@Entity
@Getter
@Setter
public class HeadOfficeDto {
    @Id
    @GeneratedValue
    private long id;
    private float balance;
    private int oneCentCount;
    private int tenCentCount;
    private int quarterCount;
    private int oneDollarCount;
    private int fiveDollarCount;
    private int twentyDollarCount;
    @Transient
    private float amount;
    @PostLoad
    public void setAmount() {
        amount = oneCentCount * 0.01f + tenCentCount * 0.10f + quarterCount * 0.25f
                + oneDollarCount * 1f
                + fiveDollarCount * 5f + twentyDollarCount * 20f;
    }
    public HeadOffice convertToHeadOffice() {
        HeadOffice headOffice = new HeadOffice();
        headOffice.setId(id);
        headOffice.setBalance(balance);
        headOffice.setCash(new Money(oneCentCount, tenCentCount, quarterCount,
                oneDollarCount, fiveDollarCount, twentyDollarCount));
        return headOffice;
    }
}

重启应用，在浏览器查看http://localhost:23333/h2-console：

接下来为HeadOffice添加变更手续费方法：

package com.lugew.domaindrivendesignwithspringboot.management;
import com.lugew.domaindrivendesignwithspringboot.common.AggregateRoot;
import com.lugew.domaindrivendesignwithspringboot.sharedkernel.Money;
import lombok.Getter;
import lombok.Setter;
import static com.lugew.domaindrivendesignwithspringboot.sharedkernel.Money.None;
@Getter
@Setter
public class HeadOffice extends AggregateRoot {
    private float balance;
    private Money cash = None;
    public void changeBalance(float delta) {
        balance += delta;
    }
    public HeadOfficeDto convertToHeadOfficeDto() {
        HeadOfficeDto headOfficeDto = new HeadOfficeDto();
        headOfficeDto.setId(id);
        headOfficeDto.setBalance(balance);
        headOfficeDto.setOneCentCount(cash.getOneCentCount());
        headOfficeDto.setTenCentCount(cash.getTenCentCount());
        headOfficeDto.setQuarterCount(cash.getQuarterCount());
        headOfficeDto.setOneDollarCount(cash.getOneDollarCount());
        headOfficeDto.setFiveDollarCount(cash.getFiveDollarCount());
        headOfficeDto.setTwentyDollarCount(cash.getTwentyDollarCount());
        return headOfficeDto;
    }
}

再添加资源库：

package com.lugew.domaindrivendesignwithspringboot.management;
import org.springframework.data.repository.CrudRepository;
public interface HeadOfficeRepository extends CrudRepository<HeadOfficeDto, Long> {
}

最后根据需求创建一个HeadOffice，我们直接提供获取实体的单例：

package com.lugew.domaindrivendesignwithspringboot.management;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Component;
@Component
@RequiredArgsConstructor
public class HeadOfficeInstance {
    private final HeadOfficeRepository headOfficeRepository;
    private static final long HeadOfficeId = 1;
    private HeadOfficeDto headOfficeDto;    
    public HeadOfficeDto getInstance() {
        return headOfficeRepository.findById(HeadOfficeId).orElse(null);
    }
}

还有一个问题，这个类属于洋葱架构的哪个位置？它看起来和资源库相似，所以属于资源库相同的层级，此层中的类是不能被内层应用的，只能被相同或上层引用。这个类有别与资源库，因为它维持了一个实例对象，所以不能由资源库来行使。
准备工作已完成，我们将ATM和HeadOffice两者联系起来。