Software Architecture in Java: Design & Development/

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Develop the Mock Service

Develop the Mock Service

Develop a mock service for saving data to an in-memory database.

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The mock service is a Spring JSON based controller that saves the data to an in-memory database.

add function

Let’s start with a simple addition to the database. The design of the in-memory database is based on the Singleton pattern, which is implemented using enum.

The identifier field starts at one and is incremented by one in each addition.

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public enum ProductInMemoryDB {

  INSTANCE;



  private static List < ProductDto > list = new ArrayList < ProductDto > ();

  private static Integer lastId = 0;



  public Integer getId() {

    return ++lastId;

  }

  

  public void add(ProductDto productDto) {

    productDto.setId(getId());

    list.add(productDto);

  }

}

Create operation

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