Imports github.com/go-spring/spring-base/log github.com/go-spring/spring-core/gs github.com/go-spring/spring-core/gs/cond github.com/opentracing/opentracing-go github.com/uber/jaeger-client-go github.com/uber/jaeger-client-go/config github.com/uber/jaeger-lib/metrics Standard library imports os os/signal syscall time