63.Create the Services Layer

What is the service layer in Java?

• The service layer consists of a collection of Java classes that implement business logic through high-level methods.
• The service layer is an additional layer in an ASP.NET MVC application that contains business logic and validation logic.
• The service layer is a conceptual layer within a network service provider architecture that serves third-party value-added services.
• The service layer provides logic to operate on the data sent to and from the DAO and the client.

Why do we create a service layer?

• To implement business logic in an ASP.NET MVC application.
• To provide middleware for third-party value-added services.
• To mediate communication between a controller and repository layer and contain validation logic.
• To perform operations based on incoming requests from individual microservices.

What is the service layer?

• The conceptual layer within a network service provider architecture.
• The layer that provides a set of operations/transactions for entities in microservices.
• The architectural pattern for organizing services into logical layers.
• The layer that facilitates communication between the controller and the persistence layer.

What is the service layer and DAO layer?

• DAO is closer to the storage systems, while the service layer operates on data between the DAO and the client.
• The service layer is responsible for communication with the database, while the DAO layer contains business logic.
• The DAO layer provides a connection to the database, while the service layer operates on data between the DAO and the client.
• The service layer and DAO layer have the same functionality and purpose.

What are the three as service layers?

• SaaS, PaaS, IaaS
• Presentation layer, Application layer, Data layer
• Data Link Layer, Network Layer, Transport Layer
• Controller layer, Service layer, Repository layer

What is the Service Layer in Microservices?

• The layer that provides a set of operations/transactions for entities in microservices.
• The layer that performs operations based on incoming requests from individual microservices.
• The layer that communicates between the controller and the persistence layer in a microservices architecture.
• The layer that contains business logic and validation logic in a microservices architecture.

Do I need a service layer?

• Yes, for all APIs, even simple CRUD operations.
• No, unless the API involves complex logic or calculations.
• Yes, to separate business logic from the repository layer.
• No, if the repository layer handles all the necessary operations.

What is the service layer in Spring?

• The layer that facilitates communication between the controller and the persistence layer.
• The layer that contains validation logic in an ASP.NET MVC application.
• The layer that serves third-party value-added services in a network service provider architecture.
• The layer that communicates between the model state and the controller in Spring.

What is the service layer structure?

• The architectural pattern for organizing services into logical layers.
• The layer that encapsulates the application's business logic and controls transactions.
• The layer that provides a set of available operations and coordinates the application's response.
• The layer that defines an application's boundary and available operations from the perspective of interfacing client layers.

How does the service layer work?

• It defines the application's boundary and available operations.
• It encapsulates business logic and controls transactions.
• It communicates with the controller and persistence layer.
• It performs operations based on incoming requests from individual microservices.