Http Request and Response interceptors that can be used with Apache HttpClient.
Apache HttpClient is probably the most known and used Java Http client. These interceptors make it easy to integrate with brave to catch/trace client requests. The request interceptor will start a new Span and submit cs (client sent) annotation. The response interceptor will submit cr (client received) annotation.
Example of configuring interceptors with http client:
final CloseableHttpClient httpclient =
HttpClients.custom().addInterceptorFirst(new BraveHttpRequestInterceptor(clientTracer))
.addInterceptorFirst(new BraveHttpResponseInterceptor(clientTracer)).build();
It is tested with httpclient version 4.3.3.