Scheduling jobs in Spring with Quartz Clustered mode - PoC

This repository demonstrates how to schedule jobs in Spring Boot application with Quartz Clustered mode.

Features

• Retry Pattern With Exponential Back-Off
• Quartz Clustered Mode
• PostgreSQL DB
• Flyway
• Docker / Docker Compose

Getting Started

Prerequisites:

• Java 11
• Docker

Installation

Build docker image

./gradlew bootBuildImage

Usage:

1. Start services.

   cd docker
   docker compose up -d

2. Check if all services are running.

   docker compose ps

3. Schedule new todo job.

   curl --location --request POST 'http://localhost:8080/api/v1/todos' \
   --header 'Content-Type: application/json' \
   --data-raw '{
       "id": 2
   }'

4. Simulate failure.

   curl --location --request POST 'http://localhost:8080/api/v1/todos' \
   --header 'Content-Type: application/json' \
   --data-raw '{
       "id": 1
   }'

5. Check logs and verify if retry with exponential backoff works.

   docker compose logs -f
   # ...
   # 2022-04-08 08:40:35.884 ERROR 84542 --- [z-demo_Worker-1] com.rbiedrawa.app.todos.TodoJob          : Todo [1] is odd - simulating failure😈
   # 2022-04-08 08:40:35.888 ERROR 84542 --- [z-demo_Worker-1] c.r.app.core.scheduler.RetryableJobBean  : Job todoGroup.todoJob-1 failed with exception. Rescheduling...
   # java.lang.RuntimeException: Todo 1 is odd
   # 2022-04-08 08:40:35.920  INFO 84542 --- [z-demo_Worker-1] c.r.app.core.scheduler.RetryableJobBean  : Successfully rescheduled job todoGroup.todoJob-1 using new trigger todoGroup.todoJob-1 
   # 
   # 2022-04-08 08:40:39.931 ERROR 84542 --- [z-demo_Worker-2] com.rbiedrawa.app.todos.TodoJob          : Todo [1] is odd - simulating failure😈
   # 2022-04-08 08:40:39.931 ERROR 84542 --- [z-demo_Worker-2] c.r.app.core.scheduler.RetryableJobBean  : Job todoGroup.todoJob-1 failed with exception. Rescheduling...
   # java.lang.RuntimeException: Todo 1 is odd
   # 2022-04-08 08:40:39.954  INFO 84542 --- [z-demo_Worker-2] c.r.app.core.scheduler.RetryableJobBean  : Successfully rescheduled job todoGroup.todoJob-1 using new trigger todoGroup.todoJob-1 
   # ...

6. Open Adminer and investigate database structure. Connection details:
   • System: PostgresSQL
   • Server: db
   • Username: demo
   • Password: demo
   • Database: demo
7. Stop services.

   docker compose down -v

References

For further reference, please consider the following sections:

• Quartz - Job Scheduling
• Flyway

License

Distributed under the MIT License. See LICENSE for more information.