langchain.js
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    Class CassandraChatMessageHistory

    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({ model: "gpt-4o-mini" }),
      memory: chatHistory,
    });

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

    Hierarchy (View Summary)

    Index

    Constructors

    constructor

    Properties

    lc_namespace

    Methods

    addMessage clear getMessages

    Constructors

    Properties

    lc_namespace: string[] = ...

    Methods

    • 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.

    • Method to clear all the messages from the Cassandra database.

      Returns Promise<void>

      A promise that resolves when all messages have been cleared.

    • Method to get all the messages stored in the Cassandra database.

      Returns Promise<BaseMessage[]>

      Array of stored BaseMessage instances.

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