Analysis of the Java class library development process based on DVSL framework
Analysis of the Java class library development process based on DVSL framework
Overview:
DVSL (Domain-View-Service Layer) is a framework based on domain models, views, and service layers to simplify the development process of Java libraries.This article will introduce the process of using the DVSL framework to develop the Java class library and provide relevant Java code examples to help readers understand and apply the framework.
1. Determine the field model:
Before developing the Java class library, the field models need to be determined first, that is, the business field that the class library will process and represent.For example, if an e -commerce library is developed, the field models may include goods, orders, users, etc.
2. Design field model class:
According to the field model, design the corresponding Java class.These classes should directly reflect the concepts and relationships in the business sector.Using the DVSL framework, we can use the annotation to identify the class and attributes to simplify the definition of the object relationship.The following is an example:
@DomainEntity
public class Product {
@DomainId
private Long id;
@DomainProperty
private String name;
@DomainProperty
private BigDecimal price;
// Construct function, Getter, Setter method, etc.
}
3. Realize domain service:
Domestic services are categories for processing the domain model.We can use the @Service annotation of the DVSL framework to identify the service category.The following is an example:
@Service
public class ProductService {
@Autowired
private ProductRepository productRepository;
public List<Product> getProducts() {
return productRepository.findAll();
}
public Product getProductById(Long id) {
return productRepository.findById(id);
}
// Service methods in other fields
}
4. Design view model:
The view model is used to represent and transmit the field of model data to the client.Using the DVSL framework, we can use the annotation to identify the view model class and attributes.The following is an example:
@ViewModel
public class ProductViewModel {
@ViewProperty
private Long id;
@ViewProperty
private String name;
@ViewProperty
private BigDecimal price;
// Construct function, Getter, Setter method, etc.
}
5. Implement view service:
The view service is responsible for converting field models into view models and processing client requests.We can use the @Service annotation of the DVSL framework to identify the view service class.The following is an example:
@Service
public class ProductViewService {
@Autowired
private ProductService productService;
public List<ProductViewModel> getAllProducts() {
List<Product> products = productService.getProducts();
return convertToViewModels(products);
}
public ProductViewModel getProductById(Long id) {
Product product = productService.getProductById(id);
return convertToViewModel(product);
}
// Other view service methods
private List<ProductViewModel> convertToViewModels(List<Product> products) {
// Convert the product object to the logic of the objectViewModel object
}
private ProductViewModel convertToViewModel(Product product) {
// Convert the product object to the logic of the objectViewModel object
}
}
6. Provide library connecting:
For external system use, appropriate library interfaces need to be provided.You can use the DVSL framework @Application annotation identification category library interface class, and define the method of exposed exposure in it.
@Application
public interface ProductLibrary {
List<ProductViewModel> getAllProducts();
ProductViewModel getProductById(Long id);
// Other types of library interfaces
}
7. Release the class library:
The specific implementation class of the class library interface will be implemented, and it will be published to the Maven library or other appropriate locations for other developers.
Summarize:
Using the DVSL framework can simplify the development process of the Java library.By defining field models, design field services, view models and view services, as well as providing library interfaces, you can develop and maintain the Java class library more efficiently.It is hoped that the process analysis and examples provided in this article can help readers understand and apply the DVSL framework.
