Adds remote-procedure-call via gRPC

[CoderSleek]

• Adds remote-procedure-call implementation in java via gRPC
• updates pom.xml to include remote-procedure-call module
• adds rpc communication via gRPC adding 2 micro-services cart-service and product-service
• includes unit tests and integration test for both services
• UML diagrams for both micro-services

Fixes #2680

[github-actions]

PR Summary

This PR implements remote procedure calls using gRPC in Java. It introduces two microservices, cart-service and product-service, which communicate via gRPC. The implementation includes unit and integration tests, along with UML diagrams.

Changes

File	Summary
pom.xml	The pom.xml file was modified to include the remote-procedure-call module, adding the necessary dependencies for gRPC and Protobuf.
remote-procedure-call/README.md	This README file provides a comprehensive guide on how to implement gRPC in Java, using two microservices (product-service and cart-service) for an e-commerce simulation. It details the setup, implementation, and execution of the gRPC services.
remote-procedure-call/cart-service/etc/cart-service.urm.png	New file: UML diagram for the cart-service microservice.
remote-procedure-call/cart-service/etc/cart-service.urm.puml	New file: UML diagram for the cart-service microservice.
remote-procedure-call/cart-service/pom.xml	New file: This pom.xml file configures the Maven project for the cart-service module, including dependencies and build settings.
remote-procedure-call/cart-service/src/main/java/com/iluwatar/rpc/cart/Main.java	This Java class is the main entry point for the cart-service. It initializes the gRPC channel, creates a CartServiceImpl instance, and performs operations to fetch and update product quantities.
remote-procedure-call/cart-service/src/main/java/com/iluwatar/rpc/cart/model/ProductInCart.java	New file: This Java class defines the ProductInCart model, representing a product in the shopping cart. It includes fields for id, name, type, price, and quantityToReduce.
remote-procedure-call/cart-service/src/main/java/com/iluwatar/rpc/cart/service/CartService.java	New file: This Java interface defines the contract for the CartService, specifying methods for managing products in the cart, including fetching all products and reducing quantities.
remote-procedure-call/cart-service/src/main/java/com/iluwatar/rpc/cart/service/CartServiceImpl.java	This Java class implements the CartService interface. It handles communication with the product-service via gRPC to fetch products and reduce their quantities.
remote-procedure-call/cart-service/src/main/resources/logback.xml	New file: Logback configuration file for the cart-service.
remote-procedure-call/cart-service/src/test/java/com/iluwatar/rpc/cart/service/CartServiceImplIntegrationTest.java	New file: Integration tests for CartServiceImpl, verifying interactions with the product-service.
remote-procedure-call/cart-service/src/test/java/com/iluwatar/rpc/cart/service/CartServiceImplTest.java	New file: Unit tests for CartServiceImpl, focusing on individual method functionality and error handling.
remote-procedure-call/cart-service/src/test/resources/mockito-extensions/org.mockito.plugins.MockMaker	New file: Mockito configuration file for the cart-service tests.
remote-procedure-call/etc/remote-procedure-call.urm.puml	New file: UML diagram for the overall remote procedure call architecture.
remote-procedure-call/pom.xml	This pom.xml file manages the dependencies and build configuration for the remote-procedure-call module, including gRPC and Protobuf plugins.
remote-procedure-call/product-service/etc/product-service.urm.png	New file: UML diagram for the product-service microservice.
remote-procedure-call/product-service/etc/product-service.urm.puml	New file: UML diagram for the product-service microservice.
remote-procedure-call/product-service/pom.xml	New file: This pom.xml file configures the Maven project for the product-service module, including dependencies and build settings.
remote-procedure-call/product-service/src/main/java/com/iluwatar/rpc/product/Main.java	This Java class is the main entry point for the product-service. It initializes mock product data and starts the gRPC server.
remote-procedure-call/product-service/src/main/java/com/iluwatar/rpc/product/mocks/ProductMocks.java	New file: This Java class provides mock product data for testing and initialization purposes.
remote-procedure-call/product-service/src/main/java/com/iluwatar/rpc/product/model/Product.java	New file: This Java class defines the Product model, representing a product with fields for id, name, type, price, and quantity.
remote-procedure-call/product-service/src/main/java/com/iluwatar/rpc/product/service/ProductService.java	New file: This Java interface defines the contract for the ProductService, specifying methods for retrieving product information.
remote-procedure-call/product-service/src/main/java/com/iluwatar/rpc/product/service/ProductServiceGrpcImpl.java	This Java class implements the gRPC service for product-service, handling requests to fetch all products and reduce product quantities.
remote-procedure-call/product-service/src/main/java/com/iluwatar/rpc/product/service/ProductServiceImpl.java	This Java class implements the ProductService interface, providing methods to retrieve product information from an in-memory store.
remote-procedure-call/product-service/src/main/resources/logback.xml	New file: Logback configuration file for the product-service.
remote-procedure-call/product-service/src/test/java/com/iluwatar/rpc/product/service/ProductServiceGrpcImplTest.java	New file: Unit tests for ProductServiceGrpcImpl, focusing on gRPC request handling and response generation.
remote-procedure-call/product-service/src/test/java/com/iluwatar/rpc/product/service/ProductServiceImplTest.java	New file: Unit tests for ProductServiceImpl, verifying the retrieval of product information from the in-memory store.
remote-procedure-call/product-service/src/test/java/com/iluwatar/rpc/product/service/ProductServiceIntegrationTest.java	New file: Integration tests for ProductServiceGrpcImpl, verifying the functionality of the gRPC service.
remote-procedure-call/product-service/src/test/resources/mockito-extensions/org.mockito.plugins.MockMaker	New file: Mockito configuration file for the product-service tests.
remote-procedure-call/proto/shopping.proto	New file: This Protobuf file defines the gRPC service contract, specifying the methods and data structures for communication between the cart-service and product-service.

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autogenerated by presubmit.ai

[github-actions]

✅ LGTM!

Review Summary

Commits Considered (1)

• 390358d: remote-procedure-call

Files Processed (30)

• pom.xml (1 hunk)
• remote-procedure-call/README.md (1 hunk)
• remote-procedure-call/cart-service/etc/cart-service.urm.png (0 hunks)
• remote-procedure-call/cart-service/etc/cart-service.urm.puml (1 hunk)
• remote-procedure-call/cart-service/pom.xml (1 hunk)
• remote-procedure-call/cart-service/src/main/java/com/iluwatar/rpc/cart/Main.java (1 hunk)
• remote-procedure-call/cart-service/src/main/java/com/iluwatar/rpc/cart/model/ProductInCart.java (1 hunk)
• remote-procedure-call/cart-service/src/main/java/com/iluwatar/rpc/cart/service/CartService.java (1 hunk)
• remote-procedure-call/cart-service/src/main/java/com/iluwatar/rpc/cart/service/CartServiceImpl.java (1 hunk)
• remote-procedure-call/cart-service/src/main/resources/logback.xml (1 hunk)
• remote-procedure-call/cart-service/src/test/java/com/iluwatar/rpc/cart/service/CartServiceImplIntegrationTest.java (1 hunk)
• remote-procedure-call/cart-service/src/test/java/com/iluwatar/rpc/cart/service/CartServiceImplTest.java (1 hunk)
• remote-procedure-call/cart-service/src/test/resources/mockito-extensions/org.mockito.plugins.MockMaker (1 hunk)
• remote-procedure-call/etc/remote-procedure-call.urm.puml (1 hunk)
• remote-procedure-call/pom.xml (1 hunk)
• remote-procedure-call/product-service/etc/product-service.urm.png (0 hunks)
• remote-procedure-call/product-service/etc/product-service.urm.puml (1 hunk)
• remote-procedure-call/product-service/pom.xml (1 hunk)
• remote-procedure-call/product-service/src/main/java/com/iluwatar/rpc/product/Main.java (1 hunk)
• remote-procedure-call/product-service/src/main/java/com/iluwatar/rpc/product/mocks/ProductMocks.java (1 hunk)
• remote-procedure-call/product-service/src/main/java/com/iluwatar/rpc/product/model/Product.java (1 hunk)
• remote-procedure-call/product-service/src/main/java/com/iluwatar/rpc/product/service/ProductService.java (1 hunk)
• remote-procedure-call/product-service/src/main/java/com/iluwatar/rpc/product/service/ProductServiceGrpcImpl.java (1 hunk)
• remote-procedure-call/product-service/src/main/java/com/iluwatar/rpc/product/service/ProductServiceImpl.java (1 hunk)
• remote-procedure-call/product-service/src/main/resources/logback.xml (1 hunk)
• remote-procedure-call/product-service/src/test/java/com/iluwatar/rpc/product/service/ProductServiceGrpcImplTest.java (1 hunk)
• remote-procedure-call/product-service/src/test/java/com/iluwatar/rpc/product/service/ProductServiceImplTest.java (1 hunk)
• remote-procedure-call/product-service/src/test/java/com/iluwatar/rpc/product/service/ProductServiceIntegrationTest.java (1 hunk)
• remote-procedure-call/product-service/src/test/resources/mockito-extensions/org.mockito.plugins.MockMaker (1 hunk)
• remote-procedure-call/proto/shopping.proto (1 hunk)

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[sonarqubecloud]

Quality Gate failed

Failed conditions
1 Security Hotspot
79.4% Coverage on New Code (required ≥ 80%)
D Reliability Rating on New Code (required ≥ A)

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