Providing Multitenancy with Spring Boot

Project

This project is an example project for Multi Tenancy with Spring Boot:

• https://bytefish.de/blog/spring_boot_multitenancy/

A Spring Boot WebFlux implementation can be found at:

• https://www.bytefish.de/blog/spring_boot_multitenancy_webflux.html

Additional Reading

I highly recommend reading the great writeup by Björn Beskow (@beskow) on Multitenant Architectures with Spring Boot:

• https://callistaenterprise.se/blogg/teknik/2020/09/19/multi-tenancy-with-spring-boot-part1/

Example

We start with inserting customers to the database of Tenant TenantOne:

> curl -H "X-TenantID: TenantOne" -H "Content-Type: application/json" -X POST -d "{\"firstName\" : \"Philipp\", \"lastName\" : \"Wagner\"}"  http://localhost:8080/customers

{"id":1,"firstName":"Philipp","lastName":"Wagner"}

> curl -H "X-TenantID: TenantOne" -H "Content-Type: application/json" -X POST -d "{\"firstName\" : \"Max\", \"lastName\" : \"Mustermann\"}"  http://localhost:8080/customers

{"id":2,"firstName":"Max","lastName":"Mustermann"}

Getting a list of all customers for TenantOne will now return two customers:

> curl -H "X-TenantID: TenantOne" -X GET http://localhost:8080/customers

[{"id":1,"firstName":"Philipp","lastName":"Wagner"},{"id":2,"firstName":"Max","lastName":"Mustermann"}]

While requesting a list of all customers for TenantTwo returns an empty list:

> curl -H "X-TenantID: TenantTwo" -X GET http://localhost:8080/customers

[]

We can now insert a customer into the TenantTwo database:

> curl -H "X-TenantID: TenantTwo" -H "Content-Type: application/json" -X POST -d "{\"firstName\" : \"Hans\", \"lastName\" : \"Wurst\"}"  http://localhost:8080/customers

{"id":1,"firstName":"Hans","lastName":"Wurst"}

Querying the TenantOne database still returns the two customers:

> curl -H "X-TenantID: TenantOne" -X GET http://localhost:8080/customers

[{"id":1,"firstName":"Philipp","lastName":"Wagner"},{"id":2,"firstName":"Max","lastName":"Mustermann"}]

Querying the TenantTwo database will now return the inserted customer:

> curl -H "X-TenantID: TenantTwo" -X GET http://localhost:8080/customers

[{"id":1,"firstName":"Hans","lastName":"Wurst"}]