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

Example

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

Constructors

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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