83 lines
2.6 KiB
Python
83 lines
2.6 KiB
Python
"""
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Copyright 2024, Zep Software, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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"""
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import logging
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from collections.abc import Coroutine
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from typing import Any
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from neo4j import AsyncGraphDatabase, EagerResult
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from typing_extensions import LiteralString
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from graphiti_core.driver.driver import GraphDriver, GraphDriverSession, GraphProvider
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logger = logging.getLogger(__name__)
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class Neo4jDriver(GraphDriver):
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provider = GraphProvider.NEO4J
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def __init__(
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self,
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uri: str,
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user: str | None,
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password: str | None,
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database: str = 'neo4j',
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):
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super().__init__()
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self.client = AsyncGraphDatabase.driver(
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uri=uri,
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auth=(user or '', password or ''),
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)
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self._database = database
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self.aoss_client = None
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async def execute_query(self, cypher_query_: LiteralString, **kwargs: Any) -> EagerResult:
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# Check if database_ is provided in kwargs.
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# If not populated, set the value to retain backwards compatibility
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params = kwargs.pop('params', None)
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if params is None:
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params = {}
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params.setdefault('database_', self._database)
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try:
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result = await self.client.execute_query(cypher_query_, parameters_=params, **kwargs)
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except Exception as e:
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logger.error(f'Error executing Neo4j query: {e}\n{cypher_query_}\n{params}')
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raise
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return result
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def session(self, database: str | None = None) -> GraphDriverSession:
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_database = database or self._database
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return self.client.session(database=_database) # type: ignore
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async def close(self) -> None:
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return await self.client.close()
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def delete_all_indexes(self) -> Coroutine:
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return self.client.execute_query(
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'CALL db.indexes() YIELD name DROP INDEX name',
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)
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async def health_check(self) -> None:
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"""Check Neo4j connectivity by running the driver's verify_connectivity method."""
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try:
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await self.client.verify_connectivity()
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return None
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except Exception as e:
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print(f"Neo4j health check failed: {e}")
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raise
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