aaltay commented on a change in pull request #12464:
URL: https://github.com/apache/beam/pull/12464#discussion_r465333885
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File path: sdks/python/apache_beam/testing/test_stream_service.py
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@@ -50,9 +52,17 @@ def __init__(self, reader, endpoint=None,
exception_handler=None):
self._exception_handler = lambda _: False
def start(self):
- self._server.start()
+ # A server can only be started if never started and never stopped before.
+ if not self._server_started and not self._server_stopped:
+ self._server_started = True
+ self._server.start()
def stop(self):
+ # A server can only be stopped if already started and never stopped before.
+ if not self._server_started or self._server_stopped:
Review comment:
Write this in a format similar to start():
`if self._server_started and not self._server_stopped:`
or change start to similar format as
```
if self._server_started or self._server_stopped:
return
```
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