Case Study - Work Permission

📖 Information

• Annual Paid Leave Policy:
  • To be eligible for annual paid leave, an employee must have worked at least one year in our company. Each year, employees earn leave days based on their length of service, as shown in the table below:
    
    

    Length of Service	Annual Leave (Business Days/Year)
    From 1 year up to (and including) 5 years	15
    More than 5 years up to (and including) 10 years	18
    More than 10 years	24

  • Weekends (Saturday, Sunday) and official holidays do not count towards leave days.
  • New hires can use up to 5 business days as advanced leave during their first year. This applies only to the first year of employment.
  • When a future-dated leave request is submitted, the requested days are deducted from the employee’s available leave balance.
  • Employees cannot request more leave than their remaining leave balance.
  • When a leave request is created, it is initially in the “Pending Approval” status. After managerial review, it is either “Approved” or “Rejected.”

Explore Rest APIs

Endpoints Summary

Method	Url	Description	Request Body	Path Variable	Response
POST	/api/v1/authentication/user/register	Register for Admin or User	RegisterRequest		CustomResponse<Void>
POST	/api/v1/authentication/user/login	Login for Admin or User	LoginRequest		CustomResponse<TokenResponse>
POST	/api/v1/authentication/user/refresh-token	Refresh Token for Admin or User	TokenRefreshRequest		CustomResponse<TokenResponse>
POST	/api/v1/authentication/user/logout	Logout for Admin or User	TokenInvalidateRequest		CustomResponse<Void>
POST	/api/v1/leaverequests	Create a new leave request	CreateLeaveRequest	-	CustomResponse<LeaveRequestResponse>
GET	/api/v1/leaverequests/{id}	Retrieve leave request by ID	-	id (UUID)	CustomResponse<LeaveRequestResponse>
GET	/api/v1/leaverequests/users/{userId}	Retrieve paginated leave requests for a user	LeaveRequestPagingRequest	userId	CustomResponse<CustomPagingResponse<LeaveRequestResponse>>
PATCH	/api/v1/leaverequests/{leaveRequestId}/status	Update the status of a leave request	Query Parameter: status (LeaveStatus)	leaveRequestId	CustomResponse<LeaveRequestResponse>
GET	/api/v1/leaverequests/remaining/{userId}	Retrieve remaining leave days for a user	-	userId (UUID)	CustomResponse<Long>

Technologies

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• Java 21
• Spring Boot 3.0
• Restful API
• Open Api (Swagger)
• Maven
• Junit5
• Mockito
• Integration Tests
• Docker
• Docker Compose
• CI/CD (Github Actions)
• Postman
• Prometheus
• Grafana
• Kubernetes
• JaCoCo (Test Report)

Postman

Import postman collection under postman_collection folder

Prerequisites

Define Variable in .env file

WORK_PERMISSION_DB_IP=localhost
WORK_PERMISSION_DB_PORT=3306
DATABASE_USERNAME={MY_SQL_DATABASE_USERNAME}
DATABASE_PASSWORD={MY_SQL_DATABASE_PASSWORD}

Open Api (Swagger)

http://localhost:2552/swagger-ui/index.html

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JaCoCo (Test Report)

After the command named mvn clean install completes, the JaCoCo report will be available at:

target/site/jacoco/index.html

Navigate to the target/site/jacoco/ directory.

Open the index.html file in your browser to view the detailed coverage report.

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Maven, Docker and Kubernetes Running Process

Maven Run

To build and run the application with Maven, please follow the directions shown below;

$ cd pdfcompare
$ mvn clean install
$ mvn spring-boot:run

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Docker Run

The application can be built and run by the Docker engine. The Dockerfile has multistage build, so you do not need to build and run separately.

Please follow directions shown below in order to build and run the application with Docker Compose file;

$ cd pdfcompare
$ docker-compose up -d

If you change anything in the project and run it on Docker, you can also use this command shown below

$ cd pdfcompare
$ docker-compose up --build

To monitor the application, you can use the following tools:

• Prometheus:
  Open in your browser at http://localhost:9090
  Prometheus collects and stores application metrics.

• Grafana:
  Open in your browser at http://localhost:3000
  Grafana provides a dashboard for visualizing the metrics.
  Default credentials:

  • Username: admin
  • Password: admin

• Define prometheus data source url, use this link shown below

http://prometheus:9090

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Kubernetes Run

To build and run the application with Maven, please follow the directions shown below;

• Start Minikube

$ minikube start

• Open Minikube Dashboard

$ minikube dashboard

• To deploy the application on Kubernetes, apply the Kubernetes configuration file underneath k8s folder

$ kubectl apply -f k8s

• To open Prometheus, click tunnel url link provided by the command shown below to reach out Prometheus

minikube service prometheus-service

• To open Grafana, click tunnel url link provided by the command shown below to reach out Prometheus

minikube service grafana-service

• Define prometheus data source url, use this link shown below

http://prometheus-service.default.svc.cluster.local:9090

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Docker Image Location

https://hub.docker.com/repository/docker/noyandocker/workpermission/general

Screenshots

Click here to show the screenshots of project

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Contributors

• Sercan Noyan Germiyanoğlu