Develop the Mock Service

Develop a mock service for saving data in-memory.

We'll cover the following

- add function
- Create operation
- Row identifier operation
- Remove operation
- The isPresent operation

We will not describe the management of the Member object because we have seen it many times in the previous chapters. We will only look at how to manage the link between the two instances of Member.

`add` function

The mock service will be incorporated with an in-memory standard database for saving the data. It will then be used by the mock user interface. We will begin to add functionality. We have a list of MemberMemberDto. With every new record, one instance of MemberMemberDto that has two instances of MemberDto is added to the list.

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Software Architecture

Managing a Standalone Entity

One-to-One Uni-directional Relationship

One-to-One Bi-directional Relationship

One-to-One Self-Referencing Relationship

One-to-Many Uni-directional Relationship

One-to-Many Bi-directional Relationship

One-to-Many Self-Referencing Relationship

Many-to-Many Unidirectional Relationship

Many-to-Many Bi-directional Relationship

Many-to-Many Bi-directional with Join-Attribute Relationship

Many-to-Many Self-Referencing Relationship

Many-to-Many Self-Referencing with Join-Attribute Relationship

Single Table Inheritance

Concrete Table Inheritance

Class Table Inheritance

Appendix

Develop the Mock Service

`add` function