Examples

In the examples directory you can find some examples of microservices

1. example_client - an example usage of the gemstone.RemoteService class for communication with microservices.

   There you will find two files: service.py and client.py

   In service.py you have a basic microservice that exposes two methods: say_hello(name) and slow_method(seconds). You can start it with the command

   python service.py
   

   In client.py you can find some basic interaction with the service started above.

2. example_events - an example for the publisher-subscribe pattern in the microservice communication. There are two files: service.py and service2.py. You can start them with the commands

   Warning

   You are going to need a RabbitMQ server running somewhere because the example uses it as message exchange transport

   python service.py
   python service2.py
   

   Note

   Those two commands must be executed in separate terminals/cmds because they are blocking.

   What happens here is:

   • the service.py subscribes to "said_hello" events.
   • the service2.py exposes a public method say_hello(name). When called, emits an "said_hello" event and then processes the request.

   After that, you can send a JSONRPC request to http://127.0.0.1:8000/api with the body

   {
      "jsonrpc": "2.0",
      "method": "say_hello",
      "params": {"name": "world"},
      "id": 1
   }
   

   and watch what happens.