feat: GH-4589 Add Option to Store All User Messages in MessageChatMemoryAdvisor

spring-ai-client-chat/src/main/java/org/springframework/ai/chat/client/advisor/MessageChatMemoryAdvisor.java

@@ -54,15 +54,18 @@ public final class MessageChatMemoryAdvisor implements BaseChatMemoryAdvisor {
 
 	private final Scheduler scheduler;
 
+	private final boolean storeAllUserMessages;
+
 	private MessageChatMemoryAdvisor(ChatMemory chatMemory, String defaultConversationId, int order,
-			Scheduler scheduler) {
+			Scheduler scheduler, boolean storeAllUserMessages) {
 		Assert.notNull(chatMemory, "chatMemory cannot be null");
 		Assert.hasText(defaultConversationId, "defaultConversationId cannot be null or empty");
 		Assert.notNull(scheduler, "scheduler cannot be null");
 		this.chatMemory = chatMemory;
 		this.defaultConversationId = defaultConversationId;
 		this.order = order;
 		this.scheduler = scheduler;
+		this.storeAllUserMessages = storeAllUserMessages;
 	}
 
 	@Override
@@ -88,12 +91,19 @@ public ChatClientRequest before(ChatClientRequest chatClientRequest, AdvisorChai
 
 		// 3. Create a new request with the advised messages.
 		ChatClientRequest processedChatClientRequest = chatClientRequest.mutate()
-			.prompt(chatClientRequest.prompt().mutate().messages(processedMessages).build())
-			.build();
+				.prompt(chatClientRequest.prompt().mutate().messages(processedMessages).build())
+				.build();
 
 		// 4. Add the new user message to the conversation memory.
-		UserMessage userMessage = processedChatClientRequest.prompt().getUserMessage();
-		this.chatMemory.add(conversationId, userMessage);
+		if (this.storeAllUserMessages) {
+			// Store all user messages: add the new message to the existing message list
+			List allUserMessages = processedChatClientRequest.prompt().getUserMessages();
+			this.chatMemory.add(conversationId, allUserMessages);
+		} else {
+			// Store only the latest user message
+			UserMessage userMessage = processedChatClientRequest.prompt().getUserMessage();
+			this.chatMemory.add(conversationId, userMessage);
+		}
 
 		return processedChatClientRequest;
 	}
@@ -103,10 +113,10 @@ public ChatClientResponse after(ChatClientResponse chatClientResponse, AdvisorCh
 		List<Message> assistantMessages = new ArrayList<>();
 		if (chatClientResponse.chatResponse() != null) {
 			assistantMessages = chatClientResponse.chatResponse()
-				.getResults()
-				.stream()
-				.map(g -> (Message) g.getOutput())
-				.toList();
+					.getResults()
+					.stream()
+					.map(g -> (Message) g.getOutput())
+					.toList();
 		}
 		this.chatMemory.add(this.getConversationId(chatClientResponse.context(), this.defaultConversationId),
 				assistantMessages);
@@ -121,11 +131,11 @@ public Flux<ChatClientResponse> adviseStream(ChatClientRequest chatClientRequest
 
 		// Process the request with the before method
 		return Mono.just(chatClientRequest)
-			.publishOn(scheduler)
-			.map(request -> this.before(request, streamAdvisorChain))
-			.flatMapMany(streamAdvisorChain::nextStream)
-			.transform(flux -> new ChatClientMessageAggregator().aggregateChatClientResponse(flux,
-					response -> this.after(response, streamAdvisorChain)));
+				.publishOn(scheduler)
+				.map(request -> this.before(request, streamAdvisorChain))
+				.flatMapMany(streamAdvisorChain::nextStream)
+				.transform(flux -> new ChatClientMessageAggregator().aggregateChatClientResponse(flux,
+						response -> this.after(response, streamAdvisorChain)));
 	}
 
 	public static Builder builder(ChatMemory chatMemory) {
@@ -142,6 +152,8 @@ public static final class Builder {
 
 		private ChatMemory chatMemory;
 
+		private boolean storeAllUserMessages = false;
+
 		private Builder(ChatMemory chatMemory) {
 			this.chatMemory = chatMemory;
 		}
@@ -171,12 +183,22 @@ public Builder scheduler(Scheduler scheduler) {
 			return this;
 		}
 
+		/**
+		 * Configure whether to store all user messages or only the latest one.
+		 * @param storeAllUserMessages true to store all user messages, false to store only the latest
+		 * @return the builder
+		 */
+		public Builder storeAllUserMessages(boolean storeAllUserMessages) {
+			this.storeAllUserMessages = storeAllUserMessages;
+			return this;
+		}
+
 		/**
 		 * Build the advisor.
 		 * @return the advisor
 		 */
 		public MessageChatMemoryAdvisor build() {
-			return new MessageChatMemoryAdvisor(this.chatMemory, this.conversationId, this.order, this.scheduler);
+			return new MessageChatMemoryAdvisor(this.chatMemory, this.conversationId, this.order, this.scheduler, this.storeAllUserMessages);
 		}
 
 	}

spring-ai-client-chat/src/test/java/org/springframework/ai/chat/client/advisor/MessageChatMemoryAdvisorTests.java

@@ -108,4 +108,53 @@ void testDefaultValues() {
 		assertThat(advisor.getOrder()).isEqualTo(Advisor.DEFAULT_CHAT_MEMORY_PRECEDENCE_ORDER);
 	}
 
+	@Test
+	void whenStoreAllUserMessagesIsTrueThenPreserveAllMessages() {
+		// Create a chat memory
+		ChatMemory chatMemory = MessageWindowChatMemory.builder()
+				.chatMemoryRepository(new InMemoryChatMemoryRepository())
+				.build();
+
+		// Create advisor with storeAllUserMessages set to true
+		MessageChatMemoryAdvisor advisor = MessageChatMemoryAdvisor.builder(chatMemory)
+				.storeAllUserMessages(true)
+				.build();
+
+		// Verify the advisor was built successfully
+		assertThat(advisor).isNotNull();
+	}
+
+	@Test
+	void whenStoreAllUserMessagesIsFalseThenStoreOnlyLatest() {
+		// Create a chat memory
+		ChatMemory chatMemory = MessageWindowChatMemory.builder()
+				.chatMemoryRepository(new InMemoryChatMemoryRepository())
+				.build();
+
+		// Create advisor with storeAllUserMessages set to false (default)
+		MessageChatMemoryAdvisor advisor = MessageChatMemoryAdvisor.builder(chatMemory)
+				.storeAllUserMessages(false)
+				.build();
+
+		// Verify the advisor was built successfully
+		assertThat(advisor).isNotNull();
+	}
+
+	@Test
+	void testDefaultStoreAllUserMessagesValue() {
+		// Create a chat memory
+		ChatMemory chatMemory = MessageWindowChatMemory.builder()
+				.chatMemoryRepository(new InMemoryChatMemoryRepository())
+				.build();
+
+		// Create advisor with default values
+		MessageChatMemoryAdvisor advisor = MessageChatMemoryAdvisor.builder(chatMemory).build();
+
+		// Verify the advisor was built successfully
+		assertThat(advisor).isNotNull();
+		// Note: We cannot directly verify the default value of storeAllUserMessages
+		// since it's a private field, but the construction should succeed
+	}
+
+
 }