Multi-tenant and Highly Available Application Boilerplate

based on Spring Boot 2

This an incubator project to try out various technologies in the domain of Cloud Applications. This project is just a tool for creating modules that gives real value for developing applications.

Concepts & Technologies

Multi-tenant

Get tenant ID

• from server name (subdomain) *
• from request header
• from user DB entity

Separate tenant data

• by using tenant descriptor field for all data
• by using separate DB schema per tenant *
• by using separate physical database per tenant

Managing configuration externally

• Configuration is not packaged together with code *
• Configuration is updating without the need of application restart *
• Tenant configuration if used from externalized config *

Highly Available (HA)

• Persist session data *
• Persist application caches
• Persist data
• Zero downtime deployment support
• Communication between services & circuit breakers

CI/CD

• Migrate the whole application inside Heroku infrastructure **
• Migrate the whole application inside Amazon infrastructure **
• Migrate the whole build and deploy pipeline to Amazon infrastructure **

Items marked with * (asterisk) is in the primary scope of this project.

Items marked with ** (double asterisk) is in the primary scope of this project.

Artifacts to create (in separate repositories)

• Auto-configuration for retrieving tenant ID (e.g.: spring-boot-starter-multitenancy)
• Auto-configuration for separating tenant data (e.g.: spring-boot-starter-multitenancy-data)
• Auto-configuration for persisting session data (e.g.: spring-boot-starter-multitenancy-session)
• Auto-configuration for cloud config (e.g.: spring-boot-starter-multitenancy-config)

To be supported technologies

• Spring Boot 2 / Spring Framework 5
• SQL databases (MySQL, AWS Aurora)
• no-SQL databases (MongoDB, AWS DynamoDB)