opentracing

package
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Published: Jul 13, 2016 License: MIT Imports: 12 Imported by: 0

Documentation

Overview

Package opentracing provides Go kit integration to the OpenTracing project. OpenTracing implements a general purpose interface that microservices can program against, and which adapts to all major distributed tracing systems.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func FromGRPCRequest

func FromGRPCRequest(tracer opentracing.Tracer, operationName string, logger log.Logger) func(ctx context.Context, md *metadata.MD) context.Context

FromGRPCRequest returns a grpc RequestFunc that tries to join with an OpenTracing trace found in `req` and starts a new Span called `operationName` accordingly. If no trace could be found in `req`, the Span will be a trace root. The Span is incorporated in the returned Context and can be retrieved with opentracing.SpanFromContext(ctx).

func FromHTTPRequest

func FromHTTPRequest(tracer opentracing.Tracer, operationName string, logger log.Logger) kithttp.RequestFunc

FromHTTPRequest returns an http RequestFunc that tries to join with an OpenTracing trace found in `req` and starts a new Span called `operationName` accordingly. If no trace could be found in `req`, the Span will be a trace root. The Span is incorporated in the returned Context and can be retrieved with opentracing.SpanFromContext(ctx).

func ToGRPCRequest

func ToGRPCRequest(tracer opentracing.Tracer, logger log.Logger) func(ctx context.Context, md *metadata.MD) context.Context

ToGRPCRequest returns a grpc RequestFunc that injects an OpenTracing Span found in `ctx` into the grpc Metadata. If no such Span can be found, the RequestFunc is a noop.

func ToHTTPRequest

func ToHTTPRequest(tracer opentracing.Tracer, logger log.Logger) kithttp.RequestFunc

ToHTTPRequest returns an http RequestFunc that injects an OpenTracing Span found in `ctx` into the http headers. If no such Span can be found, the RequestFunc is a noop.

func TraceClient

func TraceClient(tracer opentracing.Tracer, operationName string) endpoint.Middleware

TraceClient returns a Middleware that wraps the `next` Endpoint in an OpenTracing Span called `operationName`.

func TraceServer

func TraceServer(tracer opentracing.Tracer, operationName string) endpoint.Middleware

TraceServer returns a Middleware that wraps the `next` Endpoint in an OpenTracing Span called `operationName`.

If `ctx` already has a Span, it is re-used and the operation name is overwritten. If `ctx` does not yet have a Span, one is created here.

Types

This section is empty.

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