Examples of Domain Services , Application Services and Infrastructure services

examples for each of the three main types of services:

Domain Services:

1. Shopping Cart Calculator Service: Calculates the total price of items in a shopping cart.
2. Order Validation Service: Validates the details of a customer's order to ensure correctness.
3. Inventory Management Service: Manages the availability and stock levels of products.
4. Discount Calculation Service: Calculates applicable discounts based on certain criteria.
5. Shipping Cost Estimation Service: Determines the cost of shipping for an order.
6. User Authentication Service: Handles user authentication and authorization processes.
7. Rating and Review Aggregator Service: Aggregates and processes customer ratings and reviews.
8. Recommendation Engine Service: Provides personalized product recommendations to users.
9. Payment Processing Service: Manages the processing of payment transactions for orders.
10. Location-Based Tax Calculation Service: Calculates taxes based on the customer's location.

Application Services:

1. Order Placement Service: Coordinates the process of placing a customer's order.
2. Product Catalog Service: Manages the retrieval and presentation of product information.
3. User Profile Management Service: Handles user account creation, updating, and deletion.
4. Shopping Cart Service: Manages the addition, removal, and modification of items in a shopping cart.
5. Search and Filter Service: Facilitates the search and filtering of products within the application.
6. Customer Support Service: Handles customer inquiries, complaints, and support requests.
7. Notification Service: Sends notifications to users about order status, promotions, etc.
8. Analytics and Reporting Service: Gathers and analyzes data for generating reports and insights.
9. Authentication Gateway Service: Mediates user authentication processes for the application.
10. Order History Service: Manages and retrieves the order history for a customer.

Infrastructure Services:

1. Database Access Service: Provides access to the database for storing and retrieving data.
2. Message Queue Service: Facilitates communication between different parts of the system through message queues.
3. Email Sending Service: Sends emails for order confirmations, password resets, etc.
4. Payment Gateway Service: Integrates with external payment gateways for processing payments.
5. File Storage Service: Manages the storage and retrieval of files, such as product images.
6. Caching Service: Caches frequently accessed data to improve performance.
7. External API Integration Service: Integrates with third-party APIs for additional functionality.
8. Logging and Monitoring Service: Handles logging of system events and monitors system health.
9. Identity Management Service: Manages user identities and permissions within the system.
10. Content Delivery Network (CDN) Service: Improves the delivery speed of static content through CDN integration.