mirror of https://github.com/hwchase17/langchain
SingleStoreDBChatMessageHistory: Add singlestoredb support for ChatMessageHistory (#11705)
**Description** - Added the `SingleStoreDBChatMessageHistory` class that inherits `BaseChatMessageHistory` and allows to use of a SingleStoreDB database as a storage for chat message history. - Added integration test to check that everything works (requires `singlestoredb` to be installed) - Added notebook with usage example - Removed custom retriever for SingleStoreDB vector store (as it is useless) --------- Co-authored-by: Volodymyr Tkachuk <vtkachuk-ua@singlestore.com>pull/11520/head^2
volodymyr-memsql
10 months ago
committed by
GitHub
parent
634ccb8ccd
commit
ff8e6981ff
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{
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"cells": [
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{
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"attachments": {},
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"cell_type": "markdown",
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"id": "91c6a7ef",
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"metadata": {},
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"source": [
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"# SingleStoreDB Chat Message History\n",
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"\n",
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"This notebook goes over how to use SingleStoreDB to store chat message history."
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "d15e3302",
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"metadata": {},
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"outputs": [],
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"source": [
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"from langchain.memory import SingleStoreDBChatMessageHistory\n",
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"\n",
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"history = SingleStoreDBChatMessageHistory(\n",
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" session_id=\"foo\",\n",
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" host=\"root:pass@localhost:3306/db\"\n",
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")\n",
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"\n",
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"history.add_user_message(\"hi!\")\n",
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"\n",
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"history.add_ai_message(\"whats up?\")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "64fc465e",
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"metadata": {},
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"outputs": [],
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"source": [
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"history.messages"
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]
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3 (ipykernel)",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.11.2"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 5
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}
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@ -0,0 +1,275 @@
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import json
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import logging
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import re
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from typing import (
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Any,
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List,
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)
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from langchain.schema import (
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BaseChatMessageHistory,
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)
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from langchain.schema.messages import BaseMessage, _message_to_dict, messages_from_dict
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logger = logging.getLogger(__name__)
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class SingleStoreDBChatMessageHistory(BaseChatMessageHistory):
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"""Chat message history stored in a SingleStoreDB database."""
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def __init__(
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self,
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session_id: str,
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*,
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table_name: str = "message_store",
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id_field: str = "id",
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session_id_field: str = "session_id",
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message_field: str = "message",
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pool_size: int = 5,
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max_overflow: int = 10,
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timeout: float = 30,
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**kwargs: Any,
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):
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"""Initialize with necessary components.
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Args:
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table_name (str, optional): Specifies the name of the table in use.
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Defaults to "message_store".
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id_field (str, optional): Specifies the name of the id field in the table.
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Defaults to "id".
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session_id_field (str, optional): Specifies the name of the session_id
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field in the table. Defaults to "session_id".
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message_field (str, optional): Specifies the name of the message field
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in the table. Defaults to "message".
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Following arguments pertain to the connection pool:
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pool_size (int, optional): Determines the number of active connections in
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the pool. Defaults to 5.
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max_overflow (int, optional): Determines the maximum number of connections
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allowed beyond the pool_size. Defaults to 10.
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timeout (float, optional): Specifies the maximum wait time in seconds for
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establishing a connection. Defaults to 30.
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Following arguments pertain to the database connection:
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host (str, optional): Specifies the hostname, IP address, or URL for the
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database connection. The default scheme is "mysql".
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user (str, optional): Database username.
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password (str, optional): Database password.
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port (int, optional): Database port. Defaults to 3306 for non-HTTP
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connections, 80 for HTTP connections, and 443 for HTTPS connections.
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database (str, optional): Database name.
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Additional optional arguments provide further customization over the
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database connection:
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pure_python (bool, optional): Toggles the connector mode. If True,
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operates in pure Python mode.
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local_infile (bool, optional): Allows local file uploads.
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charset (str, optional): Specifies the character set for string values.
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ssl_key (str, optional): Specifies the path of the file containing the SSL
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key.
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ssl_cert (str, optional): Specifies the path of the file containing the SSL
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certificate.
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ssl_ca (str, optional): Specifies the path of the file containing the SSL
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certificate authority.
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ssl_cipher (str, optional): Sets the SSL cipher list.
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ssl_disabled (bool, optional): Disables SSL usage.
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ssl_verify_cert (bool, optional): Verifies the server's certificate.
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Automatically enabled if ``ssl_ca`` is specified.
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ssl_verify_identity (bool, optional): Verifies the server's identity.
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conv (dict[int, Callable], optional): A dictionary of data conversion
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functions.
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credential_type (str, optional): Specifies the type of authentication to
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use: auth.PASSWORD, auth.JWT, or auth.BROWSER_SSO.
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autocommit (bool, optional): Enables autocommits.
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results_type (str, optional): Determines the structure of the query results:
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tuples, namedtuples, dicts.
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results_format (str, optional): Deprecated. This option has been renamed to
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results_type.
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Examples:
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Basic Usage:
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.. code-block:: python
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from langchain.memory.chat_message_histories import (
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SingleStoreDBChatMessageHistory
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)
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message_history = SingleStoreDBChatMessageHistory(
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session_id="my-session",
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host="https://user:password@127.0.0.1:3306/database"
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)
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Advanced Usage:
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.. code-block:: python
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from langchain.memory.chat_message_histories import (
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SingleStoreDBChatMessageHistory
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)
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message_history = SingleStoreDBChatMessageHistory(
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session_id="my-session",
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host="127.0.0.1",
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port=3306,
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user="user",
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password="password",
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database="db",
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table_name="my_custom_table",
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pool_size=10,
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timeout=60,
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)
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Using environment variables:
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.. code-block:: python
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from langchain.memory.chat_message_histories import (
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SingleStoreDBChatMessageHistory
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)
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os.environ['SINGLESTOREDB_URL'] = 'me:p455w0rd@s2-host.com/my_db'
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message_history = SingleStoreDBChatMessageHistory("my-session")
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"""
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self.table_name = self._sanitize_input(table_name)
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self.session_id = self._sanitize_input(session_id)
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self.id_field = self._sanitize_input(id_field)
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self.session_id_field = self._sanitize_input(session_id_field)
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self.message_field = self._sanitize_input(message_field)
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# Pass the rest of the kwargs to the connection.
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self.connection_kwargs = kwargs
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# Add connection attributes to the connection kwargs.
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if "conn_attrs" not in self.connection_kwargs:
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self.connection_kwargs["conn_attrs"] = dict()
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self.connection_kwargs["conn_attrs"]["_connector_name"] = "langchain python sdk"
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self.connection_kwargs["conn_attrs"]["_connector_version"] = "1.0.1"
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# Create a connection pool.
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try:
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from sqlalchemy.pool import QueuePool
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except ImportError:
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raise ImportError(
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"Could not import sqlalchemy.pool python package. "
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"Please install it with `pip install singlestoredb`."
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)
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self.connection_pool = QueuePool(
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self._get_connection,
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max_overflow=max_overflow,
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pool_size=pool_size,
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timeout=timeout,
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)
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self.table_created = False
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def _sanitize_input(self, input_str: str) -> str:
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# Remove characters that are not alphanumeric or underscores
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return re.sub(r"[^a-zA-Z0-9_]", "", input_str)
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def _get_connection(self) -> Any:
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try:
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import singlestoredb as s2
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except ImportError:
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raise ImportError(
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"Could not import singlestoredb python package. "
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"Please install it with `pip install singlestoredb`."
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)
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return s2.connect(**self.connection_kwargs)
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def _create_table_if_not_exists(self) -> None:
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"""Create table if it doesn't exist."""
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if self.table_created:
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return
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conn = self.connection_pool.connect()
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try:
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cur = conn.cursor()
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try:
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cur.execute(
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"""CREATE TABLE IF NOT EXISTS {}
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({} BIGINT PRIMARY KEY AUTO_INCREMENT,
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{} TEXT NOT NULL,
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{} JSON NOT NULL);""".format(
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self.table_name,
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self.id_field,
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self.session_id_field,
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self.message_field,
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),
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)
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self.table_created = True
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finally:
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cur.close()
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finally:
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conn.close()
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@property
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def messages(self) -> List[BaseMessage]: # type: ignore
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"""Retrieve the messages from SingleStoreDB"""
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self._create_table_if_not_exists()
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conn = self.connection_pool.connect()
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items = []
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try:
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cur = conn.cursor()
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try:
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cur.execute(
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"""SELECT {} FROM {} WHERE {} = %s""".format(
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self.message_field,
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self.table_name,
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self.session_id_field,
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),
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(self.session_id),
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)
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for row in cur.fetchall():
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items.append(row[0])
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finally:
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cur.close()
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finally:
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conn.close()
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messages = messages_from_dict(items)
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return messages
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def add_message(self, message: BaseMessage) -> None:
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"""Append the message to the record in SingleStoreDB"""
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self._create_table_if_not_exists()
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conn = self.connection_pool.connect()
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try:
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cur = conn.cursor()
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try:
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cur.execute(
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"""INSERT INTO {} ({}, {}) VALUES (%s, %s)""".format(
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self.table_name,
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self.session_id_field,
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self.message_field,
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),
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(self.session_id, json.dumps(_message_to_dict(message))),
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)
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finally:
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cur.close()
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finally:
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conn.close()
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def clear(self) -> None:
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"""Clear session memory from SingleStoreDB"""
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self._create_table_if_not_exists()
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conn = self.connection_pool.connect()
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try:
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cur = conn.cursor()
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try:
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cur.execute(
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"""DELETE FROM {} WHERE {} = %s""".format(
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self.table_name,
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self.session_id_field,
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),
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(self.session_id),
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)
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finally:
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cur.close()
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finally:
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conn.close()
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@ -0,0 +1,35 @@
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import json
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from langchain.memory import ConversationBufferMemory, SingleStoreDBChatMessageHistory
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from langchain.schema.messages import _message_to_dict
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# Replace these with your mongodb connection string
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TEST_SINGLESTOREDB_URL = "root:pass@localhost:3306/db"
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def test_memory_with_message_store() -> None:
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"""Test the memory with a message store."""
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# setup SingleStoreDB as a message store
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message_history = SingleStoreDBChatMessageHistory(
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session_id="test-session",
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host=TEST_SINGLESTOREDB_URL,
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)
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memory = ConversationBufferMemory(
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memory_key="baz", chat_memory=message_history, return_messages=True
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)
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# add some messages
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memory.chat_memory.add_ai_message("This is me, the AI")
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memory.chat_memory.add_user_message("This is me, the human")
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# get the message history from the memory store and turn it into a json
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messages = memory.chat_memory.messages
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messages_json = json.dumps([_message_to_dict(msg) for msg in messages])
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assert "This is me, the AI" in messages_json
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assert "This is me, the human" in messages_json
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# remove the record from SingleStoreDB, so the next test run won't pick it up
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memory.chat_memory.clear()
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assert memory.chat_memory.messages == []
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