sergeikh / cloud-enabled-microservice

Tasks microservice (Spring Boot, MVC, Data, Lombok, Cloud, OAuth2, Config, Eureka, Zuul, Hystrix, Docker)

Tasks microservice (Spring Boot, MVC, Data, Lombok, Cloud, OAuth2, Config, Eureka, Zuul, Hystrix, Docker)

Resource is a Task

Some core use cases for a Task Service are

Use cases

1. As a API consumer, I want to create a task.
2. As a API consumer, I want to assign a task to a user.
3. As a API consumer, I want to complete a task.
4. As a API consumer, I want to fetch all tasks assigned to me.

API

1. Get all tasks GET /v1/tasks
2. Create task POST /v1/tasks (with prod profile, requires JWT token for Tenant id (tasks-client))
3. Assign a task to a user POST /v1/tasks/{taskId}/assign/{userId}
4. Complete a task POST /v1/tasks/complete/{taskId}
5. Fetch all tasks assigned to me GET /v1/tasks/assigned/{userId}
6. Fetch all tasks completed by user GET /v1/tasks/assigned/{userId}/complete
7. Update Task name, description. PUT /v1/tasks/{taskId}
8. Delete Task DELETE /v1/tasks/{taskId}

Tech stack

• Spring Boot
• Spring MVC
• Spring Data JPA
• Lombok

Cloud

• Spring Cloud

• Spring Cloud Config 'config-service'

• Spring Cloud Eureka

• Spring Cloud OAuth2

• Spring Cloud Zuul

• Spring Cloud Hystrix

• Added integration test for repository, service, boundary: mvn integration-test

• Exception handling with RestExceptionHandler

• Flayway for schema migration

• Swagger for API documentation localhost:8080/swagger-ui.html

• Added versioning localhost:8080/v1/tasks

• Added pagination and sorting for get all tasks

• Added Default (development) profile, Staging and Production (prod) with MySQL support and DB migration

• Actuator for service monitoring: http://localhost:8080/health, http://localhost:8080/metrics

• Added Docker support with Spotify maven plugin

  mvn clean package docker:build

What can be added:

• HikariCP for Tomcat default Connection pool replacement
• Querydsl for advanced query filtering

Classical microservices deployment with HAProxy

Build HAProxy cd tasks-service/docker/haproxy

docker build -t ha-proxy .

Create Docker network

docker network create lb

Run tasks-service1

docker run --net lb --rm --name tasks-service1 tasks-service

Build tasks-service 'cd ../..'

mvn clean package docker:build

Run tasks-service1

docker run --net lb --name tasks-service1 tasks-service

Run tasks-service2

docker run --net lb --name tasks-service2 tasks-service

Run HAProxy

docker run --net lb --name ha-proxy -p 8080:8080 -p 8989:8989 ha-proxy

Get stats for HAProxy

http://localhost:8989/stats

Get all tasks

http://localhost:8080/v1/tasks

Kill some service

docker kill tasks-service2

Check HAProxy panel for one service down

http://localhost:8989/stats

Cloud enabled deployment

Build services

mvn clean package docker:build

Run compose

`cd tasks-service/docker/cloud-enabled`

`docker-compose up`