104 lines
3.6 KiB
Python
104 lines
3.6 KiB
Python
import modal
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import asyncio
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from tenacity import retry, retry_if_exception_type, stop_after_attempt, wait_exponential
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from distributed.app import app
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from distributed.modal_image import image
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from distributed.queues import add_nodes_and_edges_queue
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from cognee.shared.logging_utils import get_logger
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from cognee.infrastructure.databases.graph import get_graph_engine
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from cognee.infrastructure.databases.graph.config import get_graph_config
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logger = get_logger("graph_saving_worker")
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class GraphDatabaseDeadlockError(Exception):
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message = "A deadlock occurred while trying to add data points to the vector database."
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def is_deadlock_error(error):
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graph_config = get_graph_config()
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if graph_config.graph_database_provider == "neo4j":
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# Neo4j
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from neo4j.exceptions import TransientError
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if isinstance(error, TransientError) and (
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error.code == "Neo.TransientError.Transaction.DeadlockDetected"
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):
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return True
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# Kuzu
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if "deadlock" in str(error).lower() or "cannot acquire lock" in str(error).lower():
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return True
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return False
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@app.function(
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retries=3,
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image=image,
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timeout=86400,
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max_containers=5,
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secrets=[modal.Secret.from_name("distributed_cognee")],
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)
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async def graph_saving_worker():
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print("Started processing of nodes and edges; starting graph engine queue.")
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graph_engine = await get_graph_engine()
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while True:
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if await add_nodes_and_edges_queue.len.aio() != 0:
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try:
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nodes_and_edges = await add_nodes_and_edges_queue.get.aio(block=False)
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except modal.exception.DeserializationError as error:
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logger.error(f"Deserialization error: {str(error)}")
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continue
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if len(nodes_and_edges) == 0:
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print("Finished processing all nodes and edges; stopping graph engine queue.")
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return True
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if len(nodes_and_edges) == 2:
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print(
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f"Adding {len(nodes_and_edges[0])} nodes and {len(nodes_and_edges[1])} edges."
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)
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nodes = nodes_and_edges[0]
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edges = nodes_and_edges[1]
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@retry(
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retry=retry_if_exception_type(GraphDatabaseDeadlockError),
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stop=stop_after_attempt(3),
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wait=wait_exponential(multiplier=2, min=1, max=6),
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)
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async def save_graph_nodes(new_nodes):
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try:
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await graph_engine.add_nodes(new_nodes, distributed=False)
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except Exception as error:
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if is_deadlock_error(error):
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raise GraphDatabaseDeadlockError()
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@retry(
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retry=retry_if_exception_type(GraphDatabaseDeadlockError),
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stop=stop_after_attempt(3),
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wait=wait_exponential(multiplier=2, min=1, max=6),
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)
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async def save_graph_edges(new_edges):
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try:
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await graph_engine.add_edges(new_edges, distributed=False)
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except Exception as error:
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if is_deadlock_error(error):
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raise GraphDatabaseDeadlockError()
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if nodes:
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await save_graph_nodes(nodes)
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if edges:
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await save_graph_edges(edges)
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print("Finished adding nodes and edges.")
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else:
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print("No jobs, go to sleep.")
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await asyncio.sleep(5)
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