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processor.py
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"""Message processor & Notification manager keeper implementations."""
from queue import Queue
import abc
from splitio.push.parser import UpdateType
from splitio.push.workers import SplitWorker, SplitWorkerAsync, SegmentWorker, SegmentWorkerAsync
from splitio.optional.loaders import asyncio
class MessageProcessorBase(object, metaclass=abc.ABCMeta):
"""Message processor template."""
@abc.abstractmethod
def update_workers_status(self, enabled):
"""Enable/Disable push update workers."""
@abc.abstractmethod
def handle(self, event):
"""Handle incoming update event."""
@abc.abstractmethod
def shutdown(self):
"""Stop splits & segments workers."""
class MessageProcessor(MessageProcessorBase):
"""Message processor class."""
def __init__(self, synchronizer, telemetry_runtime_producer):
"""
Class constructor.
:param synchronizer: synchronizer component
:type synchronizer: splitio.sync.synchronizer.Synchronizer
"""
self._feature_flag_queue = Queue()
self._segments_queue = Queue()
self._synchronizer = synchronizer
self._feature_flag_worker = SplitWorker(synchronizer.synchronize_splits, synchronizer.synchronize_segment, self._feature_flag_queue, synchronizer.split_sync.feature_flag_storage, synchronizer.segment_storage, telemetry_runtime_producer, synchronizer.split_sync.rule_based_segment_storage)
self._segments_worker = SegmentWorker(synchronizer.synchronize_segment, self._segments_queue)
self._handlers = {
UpdateType.SPLIT_UPDATE: self._handle_feature_flag_update,
UpdateType.SPLIT_KILL: self._handle_feature_flag_kill,
UpdateType.SEGMENT_UPDATE: self._handle_segment_change,
UpdateType.RB_SEGMENT_UPDATE: self._handle_feature_flag_update
}
def _handle_feature_flag_update(self, event):
"""
Handle incoming feature_flag update notification.
:param event: Incoming feature_flag change event
:type event: splitio.push.parser.SplitChangeUpdate
"""
self._feature_flag_queue.put(event)
def _handle_feature_flag_kill(self, event):
"""
Handle incoming feature flag kill notification.
:param event: Incoming feature flag kill event
:type event: splitio.push.parser.SplitKillUpdate
"""
self._synchronizer.kill_split(event.feature_flag_name, event.default_treatment,
event.change_number)
self._feature_flag_queue.put(event)
def _handle_segment_change(self, event):
"""
Handle incoming segment update notification.
:param event: Incoming segment change event
:type event: splitio.push.parser.Update
"""
self._segments_queue.put(event)
def update_workers_status(self, enabled):
"""
Enable/Disable push update workers.
:param enabled: if True, enable workers. If False, disable them.
:type enabled: bool
"""
if enabled:
self._feature_flag_worker.start()
self._segments_worker.start()
else:
self._feature_flag_worker.stop()
self._segments_worker.stop()
def handle(self, event):
"""
Handle incoming update event.
:param event: incoming data update event.
:type event: splitio.push.BaseUpdate
"""
try:
handle = self._handlers[event.update_type]
except KeyError as exc:
raise Exception('no handler for notification type: %s' % event.update_type) from exc
handle(event)
def shutdown(self):
"""Stop feature flags & segments workers."""
self._feature_flag_worker.stop()
self._segments_worker.stop()
class MessageProcessorAsync(MessageProcessorBase):
"""Message processor class."""
def __init__(self, synchronizer, telemetry_runtime_producer):
"""
Class constructor.
:param synchronizer: synchronizer component
:type synchronizer: splitio.sync.synchronizer.Synchronizer
"""
self._feature_flag_queue = asyncio.Queue()
self._segments_queue = asyncio.Queue()
self._synchronizer = synchronizer
self._feature_flag_worker = SplitWorkerAsync(synchronizer.synchronize_splits, synchronizer.synchronize_segment, self._feature_flag_queue, synchronizer.split_sync.feature_flag_storage, synchronizer.segment_storage, telemetry_runtime_producer, synchronizer.split_sync.rule_based_segment_storage)
self._segments_worker = SegmentWorkerAsync(synchronizer.synchronize_segment, self._segments_queue)
self._handlers = {
UpdateType.SPLIT_UPDATE: self._handle_feature_flag_update,
UpdateType.SPLIT_KILL: self._handle_feature_flag_kill,
UpdateType.SEGMENT_UPDATE: self._handle_segment_change,
UpdateType.RB_SEGMENT_UPDATE: self._handle_feature_flag_update
}
async def _handle_feature_flag_update(self, event):
"""
Handle incoming feature_flag update notification.
:param event: Incoming feature_flag change event
:type event: splitio.push.parser.SplitChangeUpdate
"""
await self._feature_flag_queue.put(event)
async def _handle_feature_flag_kill(self, event):
"""
Handle incoming feature_flag kill notification.
:param event: Incoming feature_flag kill event
:type event: splitio.push.parser.SplitKillUpdate
"""
await self._synchronizer.kill_split(event.feature_flag_name, event.default_treatment,
event.change_number)
await self._feature_flag_queue.put(event)
async def _handle_segment_change(self, event):
"""
Handle incoming segment update notification.
:param event: Incoming segment change event
:type event: splitio.push.parser.Update
"""
await self._segments_queue.put(event)
async def update_workers_status(self, enabled):
"""
Enable/Disable push update workers.
:param enabled: if True, enable workers. If False, disable them.
:type enabled: bool
"""
if enabled:
self._feature_flag_worker.start()
self._segments_worker.start()
else:
await self._feature_flag_worker.stop()
await self._segments_worker.stop()
async def handle(self, event):
"""
Handle incoming update event.
:param event: incoming data update event.
:type event: splitio.push.BaseUpdate
"""
try:
handle = self._handlers[event.update_type]
except KeyError as exc:
raise Exception('no handler for notification type: %s' % event.update_type) from exc
await handle(event)
async def shutdown(self):
"""Stop splits & segments workers."""
await self._feature_flag_worker.stop()
await self._segments_worker.stop()