Deprecated API

Contents

• Terminally Deprecated
• Methods
• Constructors

Terminally Deprecated Elements

Element	Description
dev.langchain4j.chain.ConversationalRetrievalChain(ChatLanguageModel, ChatMemory, PromptTemplate, Retriever<TextSegment>)	Please use another constructor with a new ContentRetriever instead.
dev.langchain4j.chain.ConversationalRetrievalChain.Builder.promptTemplate(PromptTemplate)	Use this instead: .retrievalAugmentor(DefaultRetrievalAugmentor.builder() .contentInjector(DefaultContentInjector.builder() .promptTemplate(promptTemplate) .build()) .build());
dev.langchain4j.chain.ConversationalRetrievalChain.Builder.retriever(Retriever<TextSegment>)	Use ConversationalRetrievalChain.Builder.contentRetriever(ContentRetriever) instead.
dev.langchain4j.service.AiServices.retriever(Retriever<TextSegment>)	Use AiServices.contentRetriever(ContentRetriever) (e.g. EmbeddingStoreContentRetriever) instead. Configures a retriever that will be invoked on every method call to fetch relevant information related to the current user message from an underlying source (e.g., embedding store). This relevant information is automatically injected into the message sent to the LLM.
dev.langchain4j.service.TokenStream.onComplete(Consumer<Response<AiMessage>>)	please use TokenStream.onCompleteResponse(Consumer) instead
dev.langchain4j.service.TokenStream.onNext(Consumer<String>)	please use TokenStream.onPartialResponse(Consumer) instead

Deprecated Methods

Method	Description
dev.langchain4j.chain.ConversationalRetrievalChain.Builder.promptTemplate(PromptTemplate)	Use this instead: .retrievalAugmentor(DefaultRetrievalAugmentor.builder() .contentInjector(DefaultContentInjector.builder() .promptTemplate(promptTemplate) .build()) .build());
dev.langchain4j.chain.ConversationalRetrievalChain.Builder.retriever(Retriever<TextSegment>)	Use ConversationalRetrievalChain.Builder.contentRetriever(ContentRetriever) instead.
dev.langchain4j.service.AiServices.retriever(Retriever<TextSegment>)	Use AiServices.contentRetriever(ContentRetriever) (e.g. EmbeddingStoreContentRetriever) instead. Configures a retriever that will be invoked on every method call to fetch relevant information related to the current user message from an underlying source (e.g., embedding store). This relevant information is automatically injected into the message sent to the LLM.
dev.langchain4j.service.TokenStream.onComplete(Consumer<Response<AiMessage>>)	please use TokenStream.onCompleteResponse(Consumer) instead
dev.langchain4j.service.TokenStream.onNext(Consumer<String>)	please use TokenStream.onPartialResponse(Consumer) instead

Deprecated Constructors

Constructor	Description
dev.langchain4j.chain.ConversationalRetrievalChain(ChatLanguageModel, ChatMemory, PromptTemplate, Retriever<TextSegment>)	Please use another constructor with a new ContentRetriever instead.