Vote statistic service for https://vk.com/vezdekod challenge
- Java >= 11 needed
- Build all subproject JAR-s with bootJar Gradle task
1. VoteAPI service - REST API 4 vote adding ang statistics (total / interval).
Swagger: http://localhost:8087/swagger-ui/index.html
Run Spring Boot app:
$ java -jar ./gateway.jar
- H2 embedded db persistence (every instance uses its own inmemory DB)
- artists.yml 4 Eurovision artists-members is needed in running folder
- api-key (e. g. user ID or token) header need be added for Rate limiting (configs are in application.properties: rate-limits.max-request-per-period=10 rate-limits.period-ms=60000)
- In DEMO Jar-s there are 3 instances: 8086, 8087 and 8088 ports
2. VoteStat Spring console app
- Calculated different statistics parameters during stress test
Run console Spring app:
$ java -jar ./stat-votes.jar vote-svc-perf -n 100 -c 10 vote-svc:8087
where params:
- 100 is number of voters (with unique api-key);
- 10 is concurrency, number of threads
- 8087 is the port of VoteAPI service instance
3. GatewayAPI - reactive cloud service (WebFlux, Gateway)
- Aggregates GET-requests from multiply VoteAPI service instances
- It balances POST-requests during user voting according to crc16-method
- Communicate with other services with service registry
WebFlux swagger: http://localhost:8090/swagger-ui/index.html
Run Spring Cloud app:
$ java -jar ./gateway.jar
4. Discovery service - Eureka service registry.
- Must be started before all services
- Service management: http://localhost:8012
Run Spring Cloud app:
$ java -jar ./discovery.jar
$ java -jar ./gateway.jar
