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96c2b73457
* Tech spec for graceful shutdown * Graceful shutdown of importers/exporters * Update socket to include graceful shutdown orchestration * Adding tests for conditions tracked in this PR
75 lines
1.8 KiB
Python
75 lines
1.8 KiB
Python
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import asyncio
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import uuid
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import logging
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from aiohttp import WSMsgType
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from ... schema import Metadata
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from ... schema import EntityContexts, EntityContext
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from ... base import Publisher
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from . serialize import to_subgraph, to_value
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# Module logger
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logger = logging.getLogger(__name__)
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class EntityContextsImport:
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def __init__(
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self, ws, running, pulsar_client, queue
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):
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self.ws = ws
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self.running = running
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self.publisher = Publisher(
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pulsar_client, topic = queue, schema = EntityContexts
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)
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async def start(self):
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await self.publisher.start()
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async def destroy(self):
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# Step 1: Stop accepting new messages
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self.running.stop()
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# Step 2: Wait for publisher to drain its queue
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logger.info("Draining publisher queue...")
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await self.publisher.stop()
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# Step 3: Close websocket only after queue is drained
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if self.ws:
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await self.ws.close()
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async def receive(self, msg):
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data = msg.json()
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elt = EntityContexts(
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metadata=Metadata(
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id=data["metadata"]["id"],
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metadata=to_subgraph(data["metadata"]["metadata"]),
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user=data["metadata"]["user"],
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collection=data["metadata"]["collection"],
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),
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entities=[
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EntityContext(
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entity=to_value(ent["entity"]),
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context=ent["context"],
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)
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for ent in data["entities"]
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]
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)
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await self.publisher.send(None, elt)
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async def run(self):
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while self.running.get():
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await asyncio.sleep(0.5)
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if self.ws:
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await self.ws.close()
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self.ws = None
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