ChatModel supplier for google vertex model

[vadimlevitzky]

Hi,
I m a little confused, there is a VertexAiGeminiChatModel in langchain4j ver 1.0.0-alpha1, and in Quarkus project there is a different class named, VertexAiGeminiChatLanguageModel in the langchain4j ver 0.22.0 extension for quarkus.
When I m using in quarkus sample project the VertexAiGeminiChatLanguageModel is not working for me, checked also with openai chatModel and it was working. I checked the samples of langchain4j and run a main with VertexAiGeminiChatModel and it also worked. I don't understand what I m missing?
I m trying to implement a ChatModelSupplier and manually create the ChatLanguageModel using it's builder method. I m using the annotation @RegisterAiService(chatLanguageModelSupplier = MyChatModelSupplier.class), my supplier implementation works if I m using an OpenAI chat model builder.

[geoand]

When I m using in quarkus sample project the VertexAiGeminiChatLanguageModel is not working for me

What is not working?

[vadimlevitzky]

I implemented a chat model supplier class:

public class MyChatModelSupplier implements Supplier<ChatLanguageModel> {
	
	/**
     * 1. Enable Vertex AI in Google Cloud Console
     * 2. Set your own project and location below
     */
	
    private static final String PROJECT = "**************************";
    private static final String LOCATION = "*************************";
    private static final String MODEL_NAME = "gemini-1.5-pro-002";    
    
    @Override
	public ChatLanguageModel get() {
		/* 
		return   OpenAiChatModel.builder()
                 .apiKey("SOME_KEY")
                 .modelName("gpt-4o")
                 .logRequests(true)
		 		 .logResponses(true)
                 .build();
        */
		
		return VertexAiGeminiChatLanguageModel.builder()
	            .projectId(PROJECT)
	            .location(LOCATION)
	            .modelId(MODEL_NAME)
	            .logRequests(true)
	            .logResponses(true)
	            .build();
	}

works I mean getting response from the model
the open api part works (the commented one), and the vertex doesn't work, can't see the request logs either. I checked the parameters of the vertex in a main using the langchain4j VertexAiGeminiChatModel and it worked with the same parameters.