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materialized view pattern

Anjali Sharma answered on January 9, 2023 Popularity 5/10 Helpfulness 1/10

answer materialized view pattern

materialized view pattern

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Materialized View Pattern is recommend to store its own local copy of data in the microservice.

public interface PurchaseOrderService {
    void placeOrder(int userIndex, int productIndex);
    List<PurchaseOrderSummaryDto> getSaleSummary();
}

@Service
public class PurchaseOrderServiceImpl implements PurchaseOrderService {

    @Autowired
    private PurchaseOrderSummaryRepository purchaseOrderSummaryRepository;

    @Autowired
    private UserRepository userRepository;

    @Autowired
    private ProductRepository productRepository;

    @Autowired
    private PurchaseOrderRepository purchaseOrderRepository;

    private List<User> users;
    private List<Product> products;

    @PostConstruct
    private void init(){
        this.users = this.userRepository.findAll();
        this.products = this.productRepository.findAll();
    }
    
    @Override
    public void placeOrder(int userIndex, int productIndex) {
        PurchaseOrder purchaseOrder = new PurchaseOrder();
        purchaseOrder.setProductId(this.products.get(productIndex).getId());
        purchaseOrder.setUserId(this.users.get(userIndex).getId());
        this.purchaseOrderRepository.save(purchaseOrder);
    }

    @Override
    public List<PurchaseOrderSummaryDto> getSaleSummary() {
        return this.purchaseOrderSummaryRepository.findAll()
                        .stream()
                        .map(pos -> {
                            PurchaseOrderSummaryDto dto = new PurchaseOrderSummaryDto();
                            dto.setState(pos.getState());
                            dto.setTotalSale(pos.getTotalSale());
                            return dto;
                        })
                        .collect(Collectors.toList());
    }
}

https://medium.com/design-microservices-architecture-with-patterns/materialized-view-pattern-f29ea249f8f8

Popularity 5/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: javascript materialized view

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Contributed on Jan 09 2023

Anjali Sharma

0 Answers Avg Quality 2/10

materialized view pattern

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