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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2020/08/04 18:53:01 UTC

[GitHub] [beam] KevinGG opened a new pull request #12464: [BEAM-10637] fix: test stream service start/stop

KevinGG opened a new pull request #12464:
URL: https://github.com/apache/beam/pull/12464


   Fixed the start/stop logic so that a controller:
   1. can only be started/stopped once;
   2. can only be stopped when is started while never stopped before;
   3. does not hang indefinitely but noop for redundant or invalid start/stop calls.
   
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[GitHub] [beam] KevinGG commented on pull request #12464: [BEAM-10637] fix: test stream service start/stop

Posted by GitBox <gi...@apache.org>.
KevinGG commented on pull request #12464:
URL: https://github.com/apache/beam/pull/12464#issuecomment-668798057


   R: @aaltay 


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[GitHub] [beam] aaltay commented on a change in pull request #12464: [BEAM-10637] fix: test stream service start/stop

Posted by GitBox <gi...@apache.org>.
aaltay commented on a change in pull request #12464:
URL: https://github.com/apache/beam/pull/12464#discussion_r465333885



##########
File path: sdks/python/apache_beam/testing/test_stream_service.py
##########
@@ -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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[GitHub] [beam] KevinGG commented on a change in pull request #12464: [BEAM-10637] fix: test stream service start/stop

Posted by GitBox <gi...@apache.org>.
KevinGG commented on a change in pull request #12464:
URL: https://github.com/apache/beam/pull/12464#discussion_r465353195



##########
File path: sdks/python/apache_beam/testing/test_stream_service.py
##########
@@ -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:
       Thanks! Formatted it.




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[GitHub] [beam] aaltay merged pull request #12464: [BEAM-10637] fix: test stream service start/stop

Posted by GitBox <gi...@apache.org>.
aaltay merged pull request #12464:
URL: https://github.com/apache/beam/pull/12464


   


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