[
https://issues.apache.org/jira/browse/BEAM-8335?focusedWorklogId=323578&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-323578
]
ASF GitHub Bot logged work on BEAM-8335:
----------------------------------------
Author: ASF GitHub Bot
Created on: 04/Oct/19 17:01
Start Date: 04/Oct/19 17:01
Worklog Time Spent: 10m
Work Description: aaltay commented on pull request #9720: [BEAM-8335] Add
initial modules for interactive streaming support
URL: https://github.com/apache/beam/pull/9720#discussion_r331591095
##########
File path: sdks/python/apache_beam/testing/interactive_stream.py
##########
@@ -0,0 +1,123 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+import grpc
+import time
+
+from apache_beam.portability.api import beam_interactive_api_pb2
+from apache_beam.portability.api import beam_interactive_api_pb2_grpc
+from apache_beam.portability.api.beam_interactive_api_pb2_grpc import
InteractiveServiceServicer
+from concurrent.futures import ThreadPoolExecutor
+
+
+def to_api_state(state):
+ if state == 'STOPPED':
+ return beam_interactive_api_pb2.StatusResponse.STOPPED
+ if state == 'PAUSED':
+ return beam_interactive_api_pb2.StatusResponse.PAUSED
+ return beam_interactive_api_pb2.StatusResponse.RUNNING
+
+class InteractiveStreamController(InteractiveServiceServicer):
+ def __init__(self, endpoint, streaming_cache):
+ self._endpoint = endpoint
+ self._server = grpc.server(ThreadPoolExecutor(max_workers=10))
+ beam_interactive_api_pb2_grpc.add_InteractiveServiceServicer_to_server(
+ self, self._server)
+ self._server.add_insecure_port(self._endpoint)
+ self._server.start()
+
+ self._streaming_cache = streaming_cache
+ self._state = 'STOPPED'
+ self._playback_speed = 1.0
+
+ def Start(self, request, context):
+ """Requests that the Service starts emitting elements.
+ """
+
+ self._next_state('RUNNING')
+ self._playback_speed = request.playback_speed or 1.0
+ self._playback_speed = max(min(self._playback_speed, 1000000.0), 0.001)
+ return beam_interactive_api_pb2.StartResponse()
+
+ def Stop(self, request, context):
+ """Requests that the Service stop emitting elements.
+ """
+ self._next_state('STOPPED')
+ return beam_interactive_api_pb2.StartResponse()
+
+ def Pause(self, request, context):
+ """Requests that the Service pause emitting elements.
+ """
+ self._next_state('PAUSED')
+ return beam_interactive_api_pb2.PauseResponse()
+
+ def Step(self, request, context):
+ """Requests that the Service emit a single element from each cached source.
+ """
+ self._next_state('STEP')
+ return beam_interactive_api_pb2.StepResponse()
+
+ def Status(self, request, context):
+ """Returns the status of the service.
+ """
+ resp = beam_interactive_api_pb2.StatusResponse()
+ resp.stream_time.GetCurrentTime()
+ resp.state = to_api_state(self._state)
+ return resp
+
+ def _reset_state(self):
+ self._reader = None
+ self._playback_speed = 1.0
+ self._state = 'STOPPED'
+
+ def _next_state(self, state):
+ if not self._state or self._state == 'STOPPED':
Review comment:
When would `not self._state` be true. It seems to be alway set to something.
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Issue Time Tracking
-------------------
Worklog Id: (was: 323578)
Time Spent: 1h 20m (was: 1h 10m)
> Add streaming support to Interactive Beam
> -----------------------------------------
>
> Key: BEAM-8335
> URL: https://issues.apache.org/jira/browse/BEAM-8335
> Project: Beam
> Issue Type: Improvement
> Components: runner-py-interactive
> Reporter: Sam Rohde
> Assignee: Sam Rohde
> Priority: Major
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> This issue tracks the work items to introduce streaming support to the
> Interactive Beam experience. This will allow users to:
> * Write and run a streaming job in IPython
> * Automatically cache records from unbounded sources
> * Add a replay experience that replays all cached records to simulate the
> original pipeline execution
> * Add controls to play/pause/stop/step individual elements from the cached
> records
> * Add ability to inspect/visualize unbounded PCollections
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