修改micronaut tracing API以允许将数据发送到新的Relic Trace HttpClientSender DEFAULT_PATH

import io.micronaut.http.HttpRequest;
import io.micronaut.http.HttpResponse;
import io.micronaut.http.client.HttpClient;
import io.micronaut.http.client.exceptions.HttpClientException;
import io.micronaut.http.client.exceptions.HttpClientResponseException;
import io.micronaut.tracing.instrument.http.HttpClientSender;

import jakarta.inject.Singleton;
import java.net.URI;

@Singleton
public class RelicTraceHttpClientSender implements HttpClientSender {
    private final HttpClient httpClient;

    public RelicTraceHttpClientSender(HttpClient httpClient) {
        this.httpClient = httpClient;
    }

    @Override
    public HttpResponse<?> sendRequest(HttpRequest<?> request) {
        try {
            // 发送HTTP请求到Relic Trace系统的DEFAULT_PATH
            return httpClient.toBlocking().exchange(request.uri(new URI(DEFAULT_PATH)));
        } catch (Exception e) {
            throw new HttpClientException("Failed to send request: " + e.getMessage(), e);
        }
    }

    @Override
    public boolean supports(HttpRequest<?> request) {
        // 在这里可以根据需要判断是否支持发送该请求到Relic Trace系统
        return true;
    }
}

tracing:
  exporters:
    relic:
      type: http
      sender: com.example.RelicTraceHttpClientSender

relic:
  api-key: YOUR_API_KEY
  endpoint: https://your-relic-trace-endpoint.com

import io.micronaut.runtime.Micronaut;

import jakarta.inject.Singleton;
import io.micronaut.context.annotation.Requires;
import io.micronaut.runtime.Micronaut;
import io.micronaut.tracing.annotation.NewSpan;
import io.micronaut.tracing.annotation.SpanTag;
import io.micronaut.tracing.instrument.TracingHttpClient;

import jakarta.inject.Singleton;
import io.micronaut.http.annotation.Get;
import io.micronaut.http.client.annotation.Client;

@Singleton
public class MyApp {

    private final TracingHttpClient tracingHttpClient;

    public MyApp(TracingHttpClient tracingHttpClient) {
        this.tracingHttpClient = tracingHttpClient;
    }

    @Get("/")
    @NewSpan("mySpan")
    public String index() {
        // 发送HTTP请求，自动使用Relic Trace的HttpClientSender发送跟踪数据
        return tracingHttpClient.toBlocking().retrieve("/");
    }

    public static void main(String[] args) {
        Micronaut.run(MyApp.class, args);
    }
}