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5. Using Config Server to fetch DB Configurations from GitHub Repository.

Book Service - Discovery Client

This application is a Eureka Client / Spring Boot microservice that serves as part of a larger application. It is designed to be discoverable and configurable using Spring Cloud.

Configuration

Eureka Client configuration

Key Type Description Default Value
spring.application.name String The name of the application. In this case : book-client
eureka.instance.hostname String Sets the hostname for a Eureka instance. For example, to set the hostname to localhost in standalone mode
eureka.client.serviceUrl.defaultZone String To specify the default zone for the Eureka server.
This property is used by Eureka clients to locate the Eureka server where they register themselves and discover other services
error.whitelabel.enabled Boolean To control whether the default error page provided by Spring Boot is enabled or not true

Cloud Config Configuration

Key Type Description Example
spring.config.import String This property can be used to specify the location of the additional configuration file(s) to be imported. optional:configserver:http://localhost:8999

Features

  • Retrieves a book by its ID.
  • Retrieves all books.
  • Saves a list of books.

Endpoints

  • GET /books/{id}: Retrieves a Book by its ID. If no Book is found, a custom RunTime Exception is handled and a meaningful error message is returned.
  • GET /books: Retrieves all Books.
  • POST /books: Saves new Books. The request body should be in JSON format, for example, refer to sample.json

How to Run

To run this project locally, you need to have Java and Maven installed on your machine. You also need to have a PostgreSQL database set up.

  1. Clone the repository
  2. Navigate to the project directory
  3. Update the client configuration like server.port and eureka.client.serviceUrl.defaultZone in application.properties file.
  4. Make sure the Eureka Server and Config Server is up and Running.
  5. Run mvn spring-boot:run to start the application
  6. See if the Service is discoverable at the Eureka Server by accessing http://localhost:9000.
  7. Access the resource of this service at http://localhost:9002/books ( 9002 port as mentioned in application.properties )

Dependencies

  • Spring Boot
  • Spring Boot Web
  • Spring Boot Data JPA
  • Spring Cloud Netflix Eureka Client
  • PostgreSQL JDBC Driver

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