1

我正在尝试使用 JHipster 对微服务应用程序进行原型设计，并且我已经尝试收集所有我能够正确完成的信息，但目前尚不完全清楚如何将 JDL 放在一起以使正确的实体处于正确的位置产生的服务。

我希望有一个目录布局，如：

/..
 gateway <- Ideal would be to have only fronted code
 invoice <- Invoice CRUD code with corresponding ms (with below JDL it is empty)
 order <- Order CRUD code with corresponding ms
 usage <- Usage CRUD code with corresponding ms (with below JDL it is empty)

这是使用的 JDL：

application {
  config {
    baseName gateway,
    applicationType gateway,
    packageName com.org.myApp.sales,
    serviceDiscoveryType eureka,
    searchEngine elasticsearch,
    authenticationType oauth2,
    prodDatabaseType postgresql,
    cacheProvider hazelcast,
    buildTool gradle,
    clientFramework react,
    testFrameworks [protractor]
  }
  entities *
}

application {
  config {
    baseName invoice,
    applicationType microservice,
    packageName com.org.myApp.invoice,
    serviceDiscoveryType eureka,
    searchEngine elasticsearch,
    authenticationType oauth2,
    prodDatabaseType postgresql,
    devDatabaseType postgresql,
    buildTool gradle,
    serverPort 8081,
    skipUserManagement true
  }
  entities Invoice, Product
}

application {
  config {
    baseName usage,
    applicationType microservice,
    packageName com.org.myApp.usage,
    serviceDiscoveryType eureka,
    searchEngine elasticsearch,
    authenticationType oauth2,
    prodDatabaseType postgresql,
    devDatabaseType postgresql,
    cacheProvider no,
    enableHibernateCache false,
    buildTool gradle,
    serverPort 8082,
    skipUserManagement true
  }
    entities Usage
}

application {
  config {
    baseName order,
    applicationType microservice,
    packageName com.org.myApp.order,
    serviceDiscoveryType eureka,
    searchEngine elasticsearch,
    authenticationType oauth2,
    prodDatabaseType postgresql,
    devDatabaseType postgresql,
    buildTool gradle,
    serverPort 8083,
    skipUserManagement true
  }
entities ProductOrder, OrderItem, ProductCategory, Product
}

entity Product {
    name String required
    description String
    price BigDecimal required min(0)
    size Size required
    image ImageBlob
}

enum Size {
    S, M, L, XL, XXL
}

entity ProductCategory {
    name String required
    description String
}

entity Customer {
    firstName String required
    lastName String required
    gender Gender required
    email String required pattern(/^[^@\s]+@[^@\s]+\.[^@\s]+$/)
    phone String required
    addressLine1 String required
    addressLine2 String
    city String required
    country String required
}

enum Gender {
    MALE, FEMALE, OTHER
}

entity ProductOrder {
    placedDate Instant required
    status OrderStatus required
    code String required
    invoiceId Long
}

enum OrderStatus {
    COMPLETED, PENDING, CANCELLED
}

entity OrderItem {
    quantity Integer required min(0)
    totalPrice BigDecimal required min(0)
    status OrderItemStatus required
}

enum OrderItemStatus {
    AVAILABLE, OUT_OF_STOCK, BACK_ORDER
}

relationship OneToOne {
    Customer{user(login) required} to User
}

relationship ManyToOne {
    OrderItem{product(name) required} to Product
}

relationship OneToMany {
   ProductOrder{orderItem} to OrderItem{order(code) required} ,
   ProductCategory{product} to Product{productCategory(name)}
}

service Product, ProductCategory, Customer, ProductOrder, OrderItem with serviceClass
paginate Product, Customer, ProductOrder, OrderItem with pagination

/* Entities for Invoice microservice */
entity Invoice {
    code String required
    date Instant required
    details String
    status InvoiceStatus required
    paymentMethod PaymentMethod required
    paymentDate Instant required
    paymentAmount BigDecimal required
}

enum InvoiceStatus {
    PAID, ISSUED, CANCELLED
}

enum PaymentMethod {
    CREDIT_CARD, CASH_ON_DELIVERY, PAYPAL
}

entity Usage {
    date Instant required
    details String
    sentDate Instant required
    userId Long required
    productId Long required
}


microservice Invoice with invoice
microservice Usage with usage
microservice Product, ProductCategory, ProductOrder, OrderItem with order
dto * with mapstruct
paginate Invoice with pagination

环境：

##### **Environment and Tools**

JHipster version: v6.6.0

java version "11.0.5" 2019-10-15 LTS
Java(TM) SE Runtime Environment 18.9 (build 11.0.5+10-LTS)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.5+10-LTS, mixed mode)

node: v12.14.0

npm: 6.13.4

yeoman: 3.1.1

INFO! Congratulations, JHipster execution is complete!

所以这是我的问题：

1. 究竟是什么控制了实体的生成位置？

        application { 
          config {
            baseName gateway,
            applicationType gateway,
            packageName com.org.myApp.sales,
            serviceDiscoveryType eureka,
            searchEngine elasticsearch,
            authenticationType oauth2,
            prodDatabaseType postgresql,
            cacheProvider hazelcast,
            buildTool gradle,
            clientFramework react,
            testFrameworks [protractor] 
          } 
           entities * <-- What if all entities associated to a different service not to the gateway? (actually when I tried I ended up with an empty folder for gateway)
        }

2.microservice <ENTITIES> with <MICROSERVICE_APP_NAME>与上述entities *部分有何关系？

3. 实体之间的关系会影响代码的生成位置吗？

4

1 回答 1

1

  1. 从后端的角度来看，实体不会在网关中生成，只会生成这些实体的前端代码

  2. 网关使用它来路由到正确的微服务

  3. 来自不同微服务的实体之间不能有任何关系，因为它们位于不同的数据库中

于 2020-01-03T11:42:52.940 回答