In this demo, we build a gateway using spring-cloud-gateway, a microservice provider-java-chassis using Java Chassis, a microservice provider-spring-cloud using Spring Cloud.

Scenario 1: User -> gateway -> provider-spring-cloud -> provider-java-chassis

Request:

`http://localhost:9090/spring-cloud/sayHello?name=World`

Result:

`"Hello from Java Chassis, World"`

Scenario 2: User -> gateway -> provider-java-chassis -> provider-spring-cloud

Request:

`http://localhost:9090/java-chassis/sayHello?name=World`

Result:

`"Hello from Spring Cloud, World"`

Maven profile and Spring Profile using servicecomb.

Maven profile and Spring Profile using nacos.

Notice: Nacos 2.3.0 and above is required. Because older versions of nacos will not generate instance id for Spring Cloud applications and Java Chassis interoperability needs instance id.