Quartz Scheduler with Spring Boot

Overview

This project is a Quartz-based scheduling system integrated with Spring Boot. It schedules tasks based on deadlines and triggers notifications accordingly.

Features

• Uses Quartz Scheduler to manage job execution.
• Loads tasks from the database on application startup and schedules them.
• Supports dynamic task scheduling based on deadlines.

Tech Stack

• Java (Spring Boot)
• Quartz Scheduler
• Spring Data JPA
• Lombok
• H2/PostgreSQL (Choose based on configuration)

Project Structure

java
├── com.bexos.quartz_scheduler
    ├── QuartzSchedulerApplication.java
    ├── config
    │   └── QuartzConfig.java
    ├── dto
    │   ├── MessageResponse.java
    │   └── TaskRequest.java
    ├── exception
    │   ├── BadRequestException.java
    │   ├── GlobalExceptionHandler.java
    │   └── NotFoundException.java
    ├── job
    │   └── NotificationJob.java
    ├── model
    │   └── Task.java
    ├── repository
    │   └── TaskRepository.java
    ├── service
    │   ├── NotificationService.java
    │   ├── TaskSchedulerService.java
    │   ├── TaskService.java
    │   └── impl
    │       ├── NotificationServiceImpl.java
    │       ├── TaskSchedulerServiceImpl.java
    │       └── TaskServiceImpl.java
    └── util
        └── ApplicationStartup.java
└── resources
    ├── application-dev.yml
    ├── application-prod.yml
    ├── application.properties

Configuration

1. Quartz Configuration

Located in QuartzConfig.java, this configures the Quartz Scheduler factory and initializes the scheduler.

2. Task Scheduling

• ApplicationStartup.java loads pending tasks on startup and schedules them.
• TaskSchedulerServiceImpl.java schedules individual tasks with Quartz.

Running the Application

1. Clone the repository:

   git clone https://github.com/your-repo/quartz-scheduler.git

2. Navigate to the project directory:

   cd quartz-scheduler

3. Build and run the application:

   mvn spring-boot:run

How It Works

1. On Application Startup:
   • Fetches all stored tasks from the database.
   • Schedules tasks with deadlines that haven't been notified yet.
2. Task Scheduling:
   • A Task entity contains a deadline field.
   • The TaskSchedulerServiceImpl schedules jobs using Quartz Scheduler.
3. Notification Execution:
   • Quartz triggers the NotificationJob at the scheduled time.

Customization

• Modify TaskSchedulerServiceImpl.java to add more job logic.
• Change ApplicationStartup.java to load tasks differently.
• Configure spring profiles in application.yml in order to use persistence database.