A simple Spring Boot microservices and Spring Cloud(Eureka Naming Server, Ribbon, Feign, Zuul, Sleuth, Zipkin).
The following has been implemented in this project:
- Established Communication between Microservices, namely - Currency-exchange-service with Currency-conversion-service.
- Centralized Microservice Configuration with Spring Cloud Config Server.
- Simplified communication with other Microservices using Feign REST Client.
- Implemented client side load balancing with Ribbon.
- Implemented dynamic scaling using Eureka Naming Server and Ribbon.
- Implemented API Gateway with Zuul.
- Implemented Distributed tracing with Spring Cloud Sleuth and Zipkin.
-
Download the project
-
Run pom.xml for project (mvn clean package)
-
Run application.java in following order:
-
Run NetflixEurekaNamingServerApplication.java
-
Run NetflixZuulApiGatewayServerApplication.java
-
CurrencyExchangeServiceApplication.java
-
CurrencyConversionServiceApplication.java
-
Example: http://localhost:8100/currency-converter-feign/from/EUR/to/INR/quantity/7500 and http://localhost:8765/currency-conversion-service/currency-converter-feign/from/EUR/to/INR/quantity/100
| Application | Port |
|---|---|
| Netflix Eureka Name Server | 8761 |
| Netflix Zuul API Gateway Server | 8765 |
| Currency Exchange Service | 8000, 8001, ... |
| Currency Conversion Service | 8100, 8101 |
| Zipkin Distributed Tracing Server | 9411 |
| H2 Database | 8000 |
| Application | URL |
|---|---|
| Netflix Eureka Name Server | http://localhost:8761/ |
| Netflix Zuul API Gateway Server | http://localhost:8765/currency-exchange-service/currency-exchange/from/EUR/to/INR http://localhost:8765/currency-conversion-service/currency-converter-feign/from/USD/to/INR/quantity/10 |
| Currency Exchange Service | http://localhost:8000/currency-exchange/from/EUR/to/INR http://localhost:8001/currency-exchange/from/USD/to/INR |
| Currency Conversion Service | http://localhost:8100/currency-converter-feign/from/EUR/to/INR/quantity/10000 |
| Zipkin Distributed Tracing Server | http://localhost:9411/zipkin/ |
| H2 Database | http://localhost:8000/h2-console |
-
Zipkin needs to be installed separately.
-
Visit Quick Start Page: https://zipkin.io/pages/quickstart
-
Downloading Zipkin Jar: https://search.maven.org/remote_content?g=io.zipkin.java&a=zipkin-server&v=LATEST&c=exec
-
Command to run: RABBIT_URI=amqp://localhost java -jar zipkin-server-2.12.9-exec.jar
-
If needed, currency-exchange-service uses data.sql file to load exchange values into H2 database. Change the following queries to your need to insert the values in the table:
insert into exchange_value values(104, 1.19, 'EUR', 0, 'USD');