A simple example with two services comunicating with each other using Retrofit and RxJava 2 for complex http requests flow.

rx-consumer services invokes 2 times rx-producer to obtain random coordinates in Poland, and with results of there 2 requests, invokes Google geocoder service to obrain address at these coordinates. If no address is found, whole process restarts up to total of 5 times.

First run both services:

mvn clean install spring-boot:run -pl rx-producer

mvn clean install spring-boot:run -pl rx-consumer

After that, you can invoke consumer service to get random addres from Poland and surroundings:

curl -X GET --header 'Accept: text/plain' 'http://localhost:8081/address/random'

You can also use swagger-ui for this too, head to, find address controler and invkoe the service:

http://localhost:8081/swagger-ui.html