intercepter

Documentation

Index

• func ClientInterceptor(tracer opentracing.Tracer) grpc.UnaryClientInterceptor
• func NewJaegerTracer(serviceName string, jagentHost string) (tracer opentracing.Tracer, closer io.Closer, err error)
• func ServerInterceptor(tracer opentracing.Tracer) grpc.UnaryServerInterceptor
• type MDCarrier
  • func (m MDCarrier) ForeachKey(handler func(key, val string) error) error
  • func (m MDCarrier) Set(key, val string)

Functions

func ClientInterceptor

func ClientInterceptor(tracer opentracing.Tracer) grpc.UnaryClientInterceptor

ClientInterceptor 客户端拦截器 https://godoc.org/google.golang.org/grpc#UnaryClientInterceptor

func NewJaegerTracer

func NewJaegerTracer(serviceName string, jagentHost string) (tracer opentracing.Tracer, closer io.Closer, err error)

NewJaegerTracer NewJaegerTracer for current service

func ServerInterceptor

func ServerInterceptor(tracer opentracing.Tracer) grpc.UnaryServerInterceptor

ServerInterceptor Server 端的拦截器

Types

type MDCarrier

type MDCarrier struct {
	metadata.MD
}

MDCarrier custome carrier

func (MDCarrier) ForeachKey

func (m MDCarrier) ForeachKey(handler func(key, val string) error) error

ForeachKey conforms to the TextMapReader interface. 这里必须要实现这个 TextMapReader 这个接口 TextMapReader is the Extract() carrier for the TextMap builtin format. With it, the caller can decode a propagated SpanContext as entries in a map of unicode strings.

type TextMapReader interface {
	// ForeachKey returns TextMap contents via repeated calls to the `handler`
	// function. If any call to `handler` returns a non-nil error, ForeachKey
	// terminates and returns that error.
	//
	// NOTE: The backing store for the TextMapReader may contain data unrelated
	// to SpanContext. As such, Inject() and Extract() implementations that
	// call the TextMapWriter and TextMapReader interfaces must agree on a
	// prefix or other convention to distinguish their own key:value pairs.
	//
	// The "foreach" callback pattern reduces unnecessary copying in some cases
	// and also allows implementations to hold locks while the map is read.
	ForeachKey(handler func(key, val string) error) error
}

func (MDCarrier) Set

func (m MDCarrier) Set(key, val string)

Set implements Set() of opentracing.TextMapWriter 这里也必须要实现 TextMapWriter is the Inject() carrier for the TextMap builtin format. With it, the caller can encode a SpanContext for propagation as entries in a map of unicode strings.

type TextMapWriter interface {
	// Set a key:value pair to the carrier. Multiple calls to Set() for the
	// same key leads to undefined behavior.
	//
	// NOTE: The backing store for the TextMapWriter may contain data unrelated
	// to SpanContext. As such, Inject() and Extract() implementations that
	// call the TextMapWriter and TextMapReader interfaces must agree on a
	// prefix or other convention to distinguish their own key:value pairs.
	Set(key, val string)
}