python - How to know if a GRPC server is available -


if grpc client starts before server, exits exception. application working on starts bunch of servers , clients (near) simultaneously, however, , have robust respect execution order. if client starts before server, want wait until server shows up.

i modified helloworld python client example follows:

done = false while not done:     try:         response = stub.sayhello(helloworld_pb2.hellorequest(name='you'), timeout=1)         print("greeter client received: " + response.message)         done = true     except:         print('waiting server connect...')         time.sleep(1)

so if start client before server, 'waiting server connect...' message scrolling terminal window expected. start server, , connects... eventually. in fact takes ten seconds before 'hello you' messages appears, surprisingly long. why might slow, , there robust way check server connection?

take @ channelconnectivity - go programmer should same in python. create while/for loop , when "channelconnectivity" set "ready" create client connection , continue.


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