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_10_LanguageModelSayHello.java
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_10_LanguageModelSayHello.java
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package devoxx.demo.gemini._1_vertexai;
import dev.langchain4j.data.message.AiMessage;
import dev.langchain4j.data.message.ChatMessage;
import dev.langchain4j.data.message.UserMessage;
import dev.langchain4j.model.chat.ChatLanguageModel;
import dev.langchain4j.model.chat.StreamingChatLanguageModel;
import dev.langchain4j.model.chat.TestStreamingResponseHandler;
import dev.langchain4j.model.output.Response;
import dev.langchain4j.model.vertexai.VertexAiGeminiChatModel;
import dev.langchain4j.model.vertexai.VertexAiGeminiStreamingChatModel;
import org.junit.jupiter.api.Test;
import java.util.ArrayList;
import java.util.List;
import static devoxx.demo.devoxx.Utilities.GCP_PROJECT_ID;
import static devoxx.demo.devoxx.Utilities.GCP_PROJECT_LOCATION;
class _10_LanguageModelSayHello {
@Test
public void shouldSayHelloToLLM() {
ChatLanguageModel chatLanguageModel= VertexAiGeminiChatModel.builder()
.project(GCP_PROJECT_ID)
.location(GCP_PROJECT_LOCATION)
.modelName("gemini-pro")
.build();
List<ChatMessage> messages = new ArrayList<>();
messages.add(new UserMessage("Hi, tell ma joke "));
Response<AiMessage> response = chatLanguageModel.generate(messages);
System.out.println(response.content());
System.out.println(response.finishReason());
System.out.println(response.tokenUsage().inputTokenCount());
System.out.println(response.tokenUsage().outputTokenCount());
System.out.println(response.tokenUsage().totalTokenCount());
}
@Test
public void shouldSayHelloToLLMStreaming() {
StreamingChatLanguageModel model = VertexAiGeminiStreamingChatModel.builder()
.project(GCP_PROJECT_ID)
.location(GCP_PROJECT_LOCATION)
.modelName("gemini-pro")
.build();
String userMessage = "What is the capital of Germany?";
// when
TestStreamingResponseHandler<AiMessage> handler = new TestStreamingResponseHandler<>();
model.generate(userMessage, handler);
Response<AiMessage> response = handler.get();
}
}