The OrderItem entity within the microservice architecture

Entity-Relationship-Model of <ProductService>

Entity Name: OrderItem

Data Schema: Shop

Master Service: ProductService

Microservices

3.1 CountryService

3.2 DiscountCampaignService

3.3 ProductService

3.4 ShopLicenseService

Entity Properties

Property Name	Datatype	Data Entity	Reference Entity
Amount	DOUBLE	OrderItem
CustomerOrder	LONG	OrderItem	CustomerOrder
PrimaryKey	LONG	OrderItem
Product	LONG	OrderItem	Product
ServerReplicationVersion	LONG	OrderItem
ShopOwner	LONG	OrderItem

Service Interfaces

Relative mapping URL	Request Method	Method Name	Microservice	Involved Entities
/orderitem	GET	findAllOrderItem()	ProductService	OrderItem
/orderitem/{id}	GET	findOrderItemById(id)	ProductService	OrderItem
/orderitem/product/{id}	GET	findAllOrderItemOfProduct(id)	ProductService	Product OrderItem
/customerdelivery/orderitem/{id}	GET	findAllCustomerDeliveryOfOrderItem(id)	ProductService	OrderItem CustomerDelivery
/orderitem	POST	insertOrderItem(orderitem)	ProductService	OrderItem
/orderitem/{id}	DELETE	deleteOrderItemById(id)	ProductService	OrderItem
/orderitem/customerorder/{id}	GET	findAllOrderItemOfCustomerOrder(id)	ProductService	CustomerOrder OrderItem
/orderitem/{id}	PUT	updateOrderItemById(orderitem)	ProductService	OrderItem

Pseudo code snippet

final OrderItem orderitem = (OrderItem) this.callMicroservice(ServiceNames.PRODUCT_SERVICE + "/orderitem/" + id, OrderItem.class);
if (orderitem != null) {
    final Product product1 = (Product) this.callMicroservice(ServiceNames.PRODUCT_SERVICE + "/product/" + orderitem.getProduct().getId(), Product.class);
    if (product1 != null) {
        final SalesTax salestax2 = (SalesTax) this.callMicroservice(ServiceNames.PRODUCT_SERVICE + "/salestax/" + product1.getSalesTax().getId(), SalesTax.class);
        if (salestax2 != null) {
            final Country country3 = (Country) this.callMicroservice(ServiceNames.COUNTRY_SERVICE + "/country/" + salestax2.getCountry().getId(), Country.class);
            if (country3 != null) {
            }
        }
        final ProductCategory productcategory4 = (ProductCategory) this.callMicroservice(ServiceNames.PRODUCT_SERVICE + "/productcategory/" + product1.getProductCategory().getId(), ProductCategory.class);
        if (productcategory4 != null) {
        }
        final Country countryoforigin5 = (Country) this.callMicroservice(ServiceNames.COUNTRY_SERVICE + "/country/" + product1.getCountryOfOrigin().getId(), Country.class);
        if (countryoforigin5 != null) {
        }
    }
    final CustomerOrder customerorder6 = (CustomerOrder) this.callMicroservice(ServiceNames.COUNTRY_SERVICE + "/customerorder/" + orderitem.getCustomerOrder().getId(), CustomerOrder.class);
    if (customerorder6 != null) {
        final ShopCustomer shopcustomer7 = (ShopCustomer) this.callMicroservice(ServiceNames.COUNTRY_SERVICE + "/shopcustomer/" + customerorder6.getShopCustomer().getId(), ShopCustomer.class);
        if (shopcustomer7 != null) {
            final Country country8 = (Country) this.callMicroservice(ServiceNames.COUNTRY_SERVICE + "/country/" + shopcustomer7.getCountry().getId(), Country.class);
            if (country8 != null) {
            }
        }
    }
}
return orderitem;

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