Java 21 & Spring Boot 3 `RestClient` Enterprise Integration

import org.springframework.core.io.FileSystemResource;
import org.springframework.http.MediaType;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.web.client.RestClient;
import java.nio.file.Path;

public class DaVinciSpringService {
    private final RestClient client;

    public DaVinciSpringService(String apiKey) {
        this.client = RestClient.builder()
            .baseUrl("https://www.davincideluxe.fr/api/v1/cloud")
            .defaultHeader("Authorization", "Bearer " + apiKey)
            .build();
    }

    public String submitJob(Path virginBin, String brand, String family, String servicesJson) {
        var form = new LinkedMultiValueMap<String, Object>();
        form.add("file", new FileSystemResource(virginBin));
        form.add("ecu_brand", brand);
        form.add("ecu_family", family);
        form.add("services", servicesJson);

        return client.post()
            .uri("/jobs")
            .contentType(MediaType.MULTIPART_FORM_DATA)
            .body(form)
            .retrieve()
            .body(String.class);
    }
}