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`