Imports github.com/uber/jaeger-client-go/crossdock/common github.com/uber/jaeger-client-go/crossdock/log github.com/opentracing/opentracing-go github.com/opentracing/opentracing-go/ext github.com/uber/jaeger-client-go github.com/uber/jaeger-client-go/config Standard library imports encoding/json fmt net/http sync time