MongoDB Atlas Chat Memory

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Node Details

• Name: MongoDBAtlasChatMemory
• Type: MongoDBAtlasChatMemory
• Version: 1.0
• Category: Memory

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Base Classes

• BufferMemory
• BufferMemoryExtended

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Parameters

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Credential

• Label: Connect Credential
• Name: credential
• Type: credential
• Credential Names: mongoDBUrlApi
• Description: MongoDB Atlas connection credentials
• Description: MongoDB Atlas connection credentials

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Inputs

1. Database
   • Label: Database
   • Name: databaseName
   • Type: string
   • Placeholder: “mongodb+srv://username:password@cluster.mongodb.net/DB_NAME”
   • Description: MongoDB Atlas database name
   • Description: MongoDB Atlas database name
2. Collection Name
   • Label: Collection Name
   • Name: collectionName
   • Type: string
   • Placeholder: <COLLECTION_NAME>
   • Description: Name of the collection to store chat messages
   • Description: Name of the collection to store chat messages
3. Session Id (Optional)
   • Label: Session Id
   • Name: sessionId
   • Type: string
   • Default: ” (empty string)
   • Description: Unique identifier for the chat session. If not specified, a random id will be used
   • Description: Unique identifier for the chat session. If not specified, a random id will be used
4. Memory Key (Additional Parameter)
   • Label: Memory Key
   • Name: memoryKey
   • Type: string
   • Default: ‘chat_history’
   • Description: Key used to store the chat history in memory
   • Description: Key used to store the chat history in memory

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Functionality

1. Initialization:
   • Connects to MongoDB Atlas using the provided credential.
   • Creates a MongoDBChatMessageHistory instance.
   • Initializes a BufferMemoryExtended instance.
2. Message Storage:
   • Stores messages as documents in the specified MongoDB collection.
   • Each document represents a chat session, identified by a sessionId.
3. Message Retrieval:
   • Retrieves messages for a specific session from MongoDB.
   • Converts stored messages to BaseMessage objects.
4. Memory Management:
   • Supports adding new messages to the chat history.
   • Allows clearing of chat history for a specific session.
5. Extended Functionality:
   • Implements MemoryMethods interface for advanced memory operations.
   • Supports overriding sessionId for flexible message management.

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Use Cases

• Long-term storage of conversation history.
• Maintaining separate chat histories for different users or contexts.
• Integrating persistent memory in chatbots or conversational AI systems.

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Notes

• This node uses a singleton pattern for MongoDB client management to optimize connections.
• It extends the base BufferMemory class to provide MongoDB-specific functionality.
• The node supports both adding individual messages and bulk message operations.