dev.langchain4j.store.memory.chat.cassandra

Class CassandraChatMemoryStore

java.lang.Object

dev.langchain4j.store.memory.chat.cassandra.CassandraChatMemoryStore

All Implemented Interfaces:

dev.langchain4j.store.memory.chat.ChatMemoryStore

Direct Known Subclasses:

AstraDbChatMemoryStore

public class CassandraChatMemoryStore
extends Object
implements dev.langchain4j.store.memory.chat.ChatMemoryStore

Implementation of ChatMemoryStore using Astra DB Vector Search. Table contains all chats. (default name is message_store). Each chat with multiple messages is a partition.Message id is a time uuid.

See Also:

Astra Vector Store Documentation

Field Summary

Fields

Modifier and Type	Field and Description
static String	DEFAULT_TABLE_NAME Default message store.

Constructor Summary

Constructors

Constructor and Description
CassandraChatMemoryStore(com.datastax.oss.driver.api.core.CqlSession session, String keyspaceName) Constructor for message store
CassandraChatMemoryStore(com.datastax.oss.driver.api.core.CqlSession session, String keyspaceName, String tableName) Constructor for message store

Method Summary

Modifier and Type	Method and Description
void	deleteMessages(@NonNull Object memoryId)
List<dev.langchain4j.data.message.ChatMessage>	getMessages(@NonNull Object memoryId)
void	updateMessages(@NonNull Object memoryId, @NonNull List<dev.langchain4j.data.message.ChatMessage> messages)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT_TABLE_NAME

public static final String DEFAULT_TABLE_NAME

Default message store.

See Also:

Constant Field Values

Constructor Detail

CassandraChatMemoryStore

public CassandraChatMemoryStore(com.datastax.oss.driver.api.core.CqlSession session,
                                String keyspaceName,
                                String tableName)

Constructor for message store

Parameters:

session - cassandra session

keyspaceName - keyspace name

tableName - table name

CassandraChatMemoryStore

public CassandraChatMemoryStore(com.datastax.oss.driver.api.core.CqlSession session,
                                String keyspaceName)

Constructor for message store

Parameters:

session - cassandra session

keyspaceName - keyspace name

Method Detail

getMessages

public List<dev.langchain4j.data.message.ChatMessage> getMessages(@NonNull
                                                                  @NonNull Object memoryId)

Specified by:

getMessages in interface dev.langchain4j.store.memory.chat.ChatMemoryStore

updateMessages

public void updateMessages(@NonNull
                           @NonNull Object memoryId,
                           @NonNull
                           @NonNull List<dev.langchain4j.data.message.ChatMessage> messages)

Specified by:

updateMessages in interface dev.langchain4j.store.memory.chat.ChatMemoryStore

deleteMessages

public void deleteMessages(@NonNull
                           @NonNull Object memoryId)

Specified by:

deleteMessages in interface dev.langchain4j.store.memory.chat.ChatMemoryStore