call service not using py.test. rpc process can't get response.

[jiamo]

I write a test_server and test_client to simple use nameko:
here is my repo : https://github.com/jiamo/nameko_research

python test_service_server.py

The test_service_client.py get some codes from cli module.

python test_service_client.py

can't get response.

So is there some misunderstandings in my repo.

[mattbennett]

Your server script starts and then immediately stops the service https://github.com/jiamo/nameko_research/blob/master/test_service_server.py#L32

You don't need to create a ServiceRunner yourself. You can use the nameko command line to run your service:

$ nameko run test_service_server --config nameko_server.conf
('config is ', {'AMQP_URI_CONFIG_KEY': 'amqp://guest:guest@localhost', 'max_workers': 10, 'AMQP_URI': 'amqp://guest:guest@localhost', 'parent_calls_tracked': 10, 'rpc_exchange': 'nameko-rpc'})
starting services: helloworld
Connected to amqp://guest:**@127.0.0.1:5672//

Also there is no need to implement the service client as you have. Just use the nameko command line:

nameko shell --config nameko_server.conf
>>> n.rpc.helloworld.hello(name='John')
u'Hello, John!'

[jiamo]

Thanks. Some times we need run without nameko command.
After using nameko run test_service_server --config nameko_server.conf
my client py can work now.
But after comment the runner.stop(), python test_service_server.py still can' t work.

[mattbennett]

You need to both apply the eventlet monkey patch and call wait() on the runner to block until it exits.

index e764db8..8597563 100644
--- a/test_service_server.py
+++ b/test_service_server.py
@@ -1,3 +1,6 @@
+import eventlet
+eventlet.monkey_patch()
+
 from nameko.rpc import rpc
 from nameko.runners import ServiceRunner
 from nameko.testing.utils import get_container
@@ -29,7 +32,7 @@ def main():
     # start both services
     runner.start()

-    runner.stop()
+    runner.wait()
     # container = ServiceContainer(HelloWorldService, config=config)
     # service_extensions = list(container.extensions)
     # print ("service_extensions is ", service_extensions)

You should really consider using the code from nameko.cli.run even if you don't use the command line script, because the signal handing is non-trivial. For example, see https://github.com/onefinestay/nameko/blob/master/nameko/cli/run.py#L134

I'm going to close this issue now. If you have more questions about how to use nameko please post them to the (new!) google group.