Fix #887: do not configure both ContentRetriever and RetrievalAugmentor

langchain4j-spring-boot-starter/src/main/java/dev/langchain4j/service/spring/AiServiceFactory.java

@@ -77,12 +77,10 @@ public Object getObject() {
             builder.chatMemoryProvider(chatMemoryProvider);
         }
 
-        if (contentRetriever != null) {
-            builder = builder.contentRetriever(contentRetriever);
-        }
-
         if (retrievalAugmentor != null) {
             builder = builder.retrievalAugmentor(retrievalAugmentor);
+        } else if (contentRetriever != null) {
+            builder = builder.contentRetriever(contentRetriever);
         }
 
         if (!isNullOrEmpty(tools)) {

langchain4j-spring-boot-starter/src/test/java/dev/langchain4j/service/spring/mode/automatic/withContentRetrieverAndRetrievalAugmentor/withRetrievalAugmentor/AiServiceWithContentRetrieverAndRetrievalAugmentor.java

@@ -0,0 +1,9 @@
+package dev.langchain4j.service.spring.mode.automatic.withContentRetrieverAndRetrievalAugmentor.withRetrievalAugmentor;
+
+import dev.langchain4j.service.spring.AiService;
+
+@AiService
+interface AiServiceWithContentRetrieverAndRetrievalAugmentor {
+
+    String chat(String userMessage);
+}

langchain4j-spring-boot-starter/src/test/java/dev/langchain4j/service/spring/mode/automatic/withContentRetrieverAndRetrievalAugmentor/withRetrievalAugmentor/AiServiceWithContentRetrieverAndRetrievalAugmentorApplication.java

@@ -0,0 +1,31 @@
+package dev.langchain4j.service.spring.mode.automatic.withContentRetrieverAndRetrievalAugmentor.withRetrievalAugmentor;
+
+import dev.langchain4j.rag.DefaultRetrievalAugmentor;
+import dev.langchain4j.rag.RetrievalAugmentor;
+import dev.langchain4j.rag.content.Content;
+import dev.langchain4j.rag.content.retriever.ContentRetriever;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+
+import static java.util.Collections.singletonList;
+
+@SpringBootApplication
+class AiServiceWithContentRetrieverAndRetrievalAugmentorApplication {
+
+    @Bean
+    ContentRetriever contentRetriever() {
+        return query -> singletonList(Content.from("My name is Klaus."));
+    }
+
+    @Bean
+    RetrievalAugmentor retrievalAugmentor(ContentRetriever contentRetriever) {
+        return DefaultRetrievalAugmentor.builder()
+                .contentRetriever(contentRetriever)
+                .build();
+    }
+
+    public static void main(String[] args) {
+        SpringApplication.run(AiServiceWithContentRetrieverAndRetrievalAugmentorApplication.class, args);
+    }
+}

langchain4j-spring-boot-starter/src/test/java/dev/langchain4j/service/spring/mode/automatic/withContentRetrieverAndRetrievalAugmentor/withRetrievalAugmentor/AiServiceWithContentRetrieverAndRetrievalAugmentorIT.java

@@ -0,0 +1,37 @@
+package dev.langchain4j.service.spring.mode.automatic.withContentRetrieverAndRetrievalAugmentor.withRetrievalAugmentor;
+
+import dev.langchain4j.service.spring.AiServicesAutoConfig;
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.autoconfigure.AutoConfigurations;
+import org.springframework.boot.test.context.runner.ApplicationContextRunner;
+
+import static dev.langchain4j.service.spring.mode.ApiKeys.OPENAI_API_KEY;
+import static org.assertj.core.api.Assertions.assertThat;
+
+class AiServiceWithContentRetrieverAndRetrievalAugmentorIT {
+
+    ApplicationContextRunner contextRunner = new ApplicationContextRunner()
+            .withConfiguration(AutoConfigurations.of(AiServicesAutoConfig.class));
+
+    @Test
+    void should_create_AI_service_with_content_retriever_and_retrieval_augmentor() {
+        contextRunner
+                .withPropertyValues(
+                        "langchain4j.open-ai.chat-model.api-key=" + OPENAI_API_KEY,
+                        "langchain4j.open-ai.chat-model.max-tokens=20",
+                        "langchain4j.open-ai.chat-model.temperature=0.0"
+                )
+                .withUserConfiguration(AiServiceWithContentRetrieverAndRetrievalAugmentorApplication.class)
+                .run(context -> {
+
+                    // given
+                    AiServiceWithContentRetrieverAndRetrievalAugmentor aiService = context.getBean(AiServiceWithContentRetrieverAndRetrievalAugmentor.class);
+
+                    // when
+                    String answer = aiService.chat("What is my name?");
+
+                    // then
+                    assertThat(answer).containsIgnoringCase("Klaus");
+                });
+    }
+}