rogeroga / demo6camunda

Saga orchestration example using Camunda Platform 7 (BPMN-compliant framework)

Demo for Saga using Camunda Platform 7

Demo project for ordering stuff with a simple Ordering Saga utilizing Camunda Platform 7 to take into account possible compensations in case ordering process fails mid-step.

Note that the newest version is Camunda 8, however Camunda 7 is open-source, while Camunda 8 is closed-source cloud-based SaaS solution.

• By Maxym Mykhalchuk, see license
• Built on Spring Boot 3 / Spring Framework 6
• REST microservices (no CQRS/Event-Sourcing)
• Uses MongoDB as storage

To run

• Start MongoDB locally on port 27017 with no password
  • For example, using docker docker run --env=MONGODB_REPLICA_SET_MODE=primary --env=ALLOW_EMPTY_PASSWORD=yes -p 27017:27017 --name demo6-mongodb -d bitnami/mongodb:latest
  • To remove, docker stop demo6-mongodb and docker rm demo6-mongodb
• Then start all the services ./gradlew bootRun --parallel --max-workers 3

To test

• Open the services
  • Inventory Service
  • Payment Service to see remaining user credit
  • Main Order Service to create orders and employ the Saga that uses Camunda Platform 7
• Open Saga monitoring using Camunda
  • Open Camunda Cockpit with user demo and password demo
  • And click 'Order Workflow'
• Order anything via Order Service
• Observe decreased user credit in Payment Service
• Then, after some time, Saga will fail on the last step, and user credit will be restored