Class for storing chat message history within Cassandra. It extends the BaseListChatMessageHistory class and provides methods to get, add, and clear messages.

const chatHistory = new CassandraChatMessageHistory({
cloud: {
secureConnectBundle: "<path to your secure bundle>",
},
credentials: {
username: "token",
password: "<your Cassandra access token>",
},
keyspace: "langchain",
table: "message_history",
sessionId: "<some unique session identifier>",
});

const chain = new ConversationChain({
llm: new ChatOpenAI(),
memory: chatHistory,
});

const response = await chain.invoke({
input: "What did I just say my name was?",
});
console.log({ response });

Hierarchy

  • BaseListChatMessageHistory
    • CassandraChatMessageHistory

Constructors

Methods

  • Parameters

    • message: string

    Returns Promise<void>

    Use addAIMessage instead

  • This is a convenience method for adding an AI message string to the store. Please note that this is a convenience method. Code should favor the bulk addMessages interface instead to save on round-trips to the underlying persistence layer. This method may be deprecated in a future release.

    Parameters

    • message: string

    Returns Promise<void>

  • Method to add a new message to the Cassandra database.

    Parameters

    • message: BaseMessage

      The BaseMessage instance to add.

    Returns Promise<void>

    A promise that resolves when the message has been added.

  • Add a list of messages.

    Implementations should override this method to handle bulk addition of messages in an efficient manner to avoid unnecessary round-trips to the underlying store.

    Parameters

    • messages: BaseMessage[]

      A list of BaseMessage objects to store.

    Returns Promise<void>

  • This is a convenience method for adding a human message string to the store. Please note that this is a convenience method. Code should favor the bulk addMessages interface instead to save on round-trips to the underlying persistence layer. This method may be deprecated in a future release.

    Parameters

    • message: string

    Returns Promise<void>

  • Returns Serialized