Package org.springframework.ai.chat.memory

Class MessageWindowChatMemory

java.lang.Object

org.springframework.ai.chat.memory.MessageWindowChatMemory

All Implemented Interfaces:

ChatMemory

public final class MessageWindowChatMemory
extends Object
implements ChatMemory

A chat memory implementation that maintains a message window of a specified size, ensuring that the total number of messages does not exceed the specified limit. When the number of messages exceeds the maximum size, older messages are evicted.

Messages of type SystemMessage are treated specially: if a new SystemMessage is added, all previous SystemMessage instances are removed from the memory. Also, if the total number of messages exceeds the limit, the SystemMessage messages are preserved while evicting other types of messages.

Since:

1.0.0

Author:

Thomas Vitale

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	MessageWindowChatMemory.Builder

Field Summary

Fields inherited from interface org.springframework.ai.chat.memory.ChatMemory

DEFAULT_CONVERSATION_ID

Method Summary

Modifier and Type	Method	Description
void	add(String conversationId, List<Message> messages)	Save the specified messages in the chat memory for the specified conversation.
static MessageWindowChatMemory.Builder	builder()
void	clear(String conversationId)	Clear the chat memory for the specified conversation.
List<Message>	get(String conversationId)	Get the messages in the chat memory for the specified conversation.
List<Message>	get(String conversationId, int lastN)	Deprecated.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.ai.chat.memory.ChatMemory

add

Method Details

add

public void add(String conversationId,
 List<Message> messages)

Description copied from interface: ChatMemory

Save the specified messages in the chat memory for the specified conversation.

Specified by:

add in interface ChatMemory

get

public List<Message> get(String conversationId)

Description copied from interface: ChatMemory

Get the messages in the chat memory for the specified conversation.

Specified by:

get in interface ChatMemory

get

@Deprecated
public List<Message> get(String conversationId,
 int lastN)

Deprecated.

Specified by:

get in interface ChatMemory

clear

public void clear(String conversationId)

Description copied from interface: ChatMemory

Clear the chat memory for the specified conversation.

Specified by:

clear in interface ChatMemory

builder

public static MessageWindowChatMemory.Builder builder()