feat: [OpenAI] Sample code for Agentic Workflow tutorial

sample-code/spring-app/src/main/java/com/sap/ai/sdk/app/controllers/SpringAiAgenticWorkflowController.java

@@ -0,0 +1,36 @@
+package com.sap.ai.sdk.app.controllers;
+
+import com.sap.ai.sdk.app.services.SpringAiAgenticWorkflowService;
+import com.sap.ai.sdk.orchestration.spring.OrchestrationSpringChatResponse;
+import javax.annotation.Nullable;
+import lombok.extern.slf4j.Slf4j;
+import lombok.val;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+/** Endpoints for the AgenticWorkflow Service */
+@SuppressWarnings("unused")
+@RestController
+@Slf4j
+@RequestMapping("/spring-ai-agentic")
+public class SpringAiAgenticWorkflowController {
+
+  @Autowired private SpringAiAgenticWorkflowService service;
+
+  @GetMapping("/chain")
+  Object completion(
+      @Nullable @RequestParam(value = "format", required = false) final String format) {
+    val response =
+        service.runAgent("I want to do a one-day trip to Paris. Help me make an itinerary, please");
+
+    if ("json".equals(format)) {
+      return ((OrchestrationSpringChatResponse) response)
+          .getOrchestrationResponse()
+          .getOriginalResponse();
+    }
+    return response.getResult().getOutput().getText();
+  }
+}

sample-code/spring-app/src/main/java/com/sap/ai/sdk/app/services/RestaurantMethod.java

@@ -0,0 +1,44 @@
+package com.sap.ai.sdk.app.services;
+
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import javax.annotation.Nonnull;
+import lombok.val;
+import org.springframework.ai.tool.annotation.Tool;
+import org.springframework.ai.tool.annotation.ToolParam;
+
+/** Mock tool for agentic workflow */
+class RestaurantMethod {
+
+  /**
+   * Request for list of restaurants
+   *
+   * @param location the city
+   */
+  record Request(String location) {}
+
+  /**
+   * Response for restaurant recommendations
+   *
+   * @param restaurants the list of restaurants
+   */
+  record Response(List<String> restaurants) {}
+
+  @Nonnull
+  @SuppressWarnings("unused")
+  @Tool(description = "Get recommended restaurants for a location")
+  static RestaurantMethod.Response getRestaurants(
+      @ToolParam @Nonnull final RestaurantMethod.Request request) {
+    val recommendations =
+        Map.of(
+            "paris",
+            List.of("Le Comptoir du Relais", "L'As du Fallafel", "Breizh Café"),
+            "reykjavik",
+            List.of("Dill Restaurant", "Fish Market", "Grillmarkaðurinn"));
+    return new RestaurantMethod.Response(
+        recommendations.getOrDefault(
+            request.location.toLowerCase(Locale.ROOT),
+            List.of("No recommendations for this city.")));
+  }
+}

sample-code/spring-app/src/main/java/com/sap/ai/sdk/app/services/SpringAiAgenticWorkflowService.java

@@ -0,0 +1,76 @@
+package com.sap.ai.sdk.app.services;
+
+import static com.sap.ai.sdk.orchestration.OrchestrationAiModel.GPT_4O_MINI;
+
+import com.sap.ai.sdk.orchestration.OrchestrationModuleConfig;
+import com.sap.ai.sdk.orchestration.spring.OrchestrationChatModel;
+import com.sap.ai.sdk.orchestration.spring.OrchestrationChatOptions;
+import java.util.List;
+import java.util.Objects;
+import javax.annotation.Nonnull;
+import lombok.extern.slf4j.Slf4j;
+import lombok.val;
+import org.springframework.ai.chat.client.ChatClient;
+import org.springframework.ai.chat.client.advisor.MessageChatMemoryAdvisor;
+import org.springframework.ai.chat.memory.InMemoryChatMemory;
+import org.springframework.ai.chat.model.ChatModel;
+import org.springframework.ai.chat.model.ChatResponse;
+import org.springframework.ai.chat.prompt.Prompt;
+import org.springframework.ai.tool.ToolCallbacks;
+import org.springframework.stereotype.Service;
+
+/** Service class for the AgenticWorkflow service */
+@Service
+@Slf4j
+public class SpringAiAgenticWorkflowService {
+  private final ChatModel client = new OrchestrationChatModel();
+  private final OrchestrationModuleConfig config =
+      new OrchestrationModuleConfig().withLlmConfig(GPT_4O_MINI);
+
+  /**
+   * Simple agentic workflow using chain-like structure. The agent is generating a travel itinerary
+   * for a given city.
+   *
+   * @param userInput the user input including the target city
+   * @return a short travel itinerary
+   */
+  @Nonnull
+  public ChatResponse runAgent(@Nonnull final String userInput) {
+
+    //    Configure chat memory
+    val memory = new InMemoryChatMemory();
+    val advisor = new MessageChatMemoryAdvisor(memory);
+    val cl = ChatClient.builder(client).defaultAdvisors(advisor).build();
+
+    //    Add (mocked) tools
+    val options = new OrchestrationChatOptions(config);
+    options.setToolCallbacks(
+        List.of(ToolCallbacks.from(new WeatherMethod(), new RestaurantMethod())));
+    options.setInternalToolExecutionEnabled(true);
+
+    //    Prompts for the chain workflow
+    final List<String> systemPrompts =
+        List.of(
+            "You are a traveling planning agent for a single day trip. Where appropriate, use the provided tools. First, start by suggesting some restaurants for the mentioned city.",
+            "Now, check the whether for the city.",
+            "Finally, combine the suggested itinerary from this conversation into a short, one-sentence plan for the day trip.");
+
+    //    Perform the chain workflow
+    String responseText = userInput;
+    ChatResponse response = null;
+
+    for (final String systemPrompt : systemPrompts) {
+
+      // Combine the pre-defined prompt with the previous answer to get the new input
+      val input = String.format("{%s}\n {%s}", systemPrompt, responseText);
+      val prompt = new Prompt(input, options);
+
+      // Make a call to the LLM with the new input
+      response =
+          Objects.requireNonNull(cl.prompt(prompt).call().chatResponse(), "Chat response is null.");
+      responseText = response.getResult().getOutput().getText();
+    }
+
+    return response;
+  }
+}

sample-code/spring-app/src/main/resources/static/index.html

@@ -789,6 +789,26 @@ <h5 class="mb-1">Orchestration Integration</h5>
                                         inquiring about France.
                                     </div>
                                 </div>
+                            </li>
+                        </ul>
+                    </div>
+                    <div class="card-body">
+                        <div class="d-flex align-items-center">
+                            <h5 class="mb-1">🤖 Agentic Workflows</h5>
+                        </div>
+                        <ul class="list-group">
+                            <li class="list-group-item">
+                                <div class="info-tooltip">
+                                    <button type="submit"
+                                            formaction="/spring-ai-agentic/chain"
+                                            class="link-offset-2-hover link-underline link-underline-opacity-0 link-underline-opacity-75-hover endpoint">
+                                        <code>/spring-ai-agentic/chain</code>
+                                    </button>
+                                    <div class="tooltip-content">
+                                        Make a call to a simple chain-like agentic workflow.
+                                    </div>
+                                </div>
+                            </li>
                         </ul>
                     </div>
                     <div class="card-body">