diff options
Diffstat (limited to 'vendor/github.com/opentracing/opentracing-go/noop.go')
-rw-r--r-- | vendor/github.com/opentracing/opentracing-go/noop.go | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/vendor/github.com/opentracing/opentracing-go/noop.go b/vendor/github.com/opentracing/opentracing-go/noop.go deleted file mode 100644 index f9b680a21..000000000 --- a/vendor/github.com/opentracing/opentracing-go/noop.go +++ /dev/null @@ -1,64 +0,0 @@ -package opentracing - -import "github.com/opentracing/opentracing-go/log" - -// A NoopTracer is a trivial, minimum overhead implementation of Tracer -// for which all operations are no-ops. -// -// The primary use of this implementation is in libraries, such as RPC -// frameworks, that make tracing an optional feature controlled by the -// end user. A no-op implementation allows said libraries to use it -// as the default Tracer and to write instrumentation that does -// not need to keep checking if the tracer instance is nil. -// -// For the same reason, the NoopTracer is the default "global" tracer -// (see GlobalTracer and SetGlobalTracer functions). -// -// WARNING: NoopTracer does not support baggage propagation. -type NoopTracer struct{} - -type noopSpan struct{} -type noopSpanContext struct{} - -var ( - defaultNoopSpanContext SpanContext = noopSpanContext{} - defaultNoopSpan Span = noopSpan{} - defaultNoopTracer Tracer = NoopTracer{} -) - -const ( - emptyString = "" -) - -// noopSpanContext: -func (n noopSpanContext) ForeachBaggageItem(handler func(k, v string) bool) {} - -// noopSpan: -func (n noopSpan) Context() SpanContext { return defaultNoopSpanContext } -func (n noopSpan) SetBaggageItem(key, val string) Span { return n } -func (n noopSpan) BaggageItem(key string) string { return emptyString } -func (n noopSpan) SetTag(key string, value interface{}) Span { return n } -func (n noopSpan) LogFields(fields ...log.Field) {} -func (n noopSpan) LogKV(keyVals ...interface{}) {} -func (n noopSpan) Finish() {} -func (n noopSpan) FinishWithOptions(opts FinishOptions) {} -func (n noopSpan) SetOperationName(operationName string) Span { return n } -func (n noopSpan) Tracer() Tracer { return defaultNoopTracer } -func (n noopSpan) LogEvent(event string) {} -func (n noopSpan) LogEventWithPayload(event string, payload interface{}) {} -func (n noopSpan) Log(data LogData) {} - -// StartSpan belongs to the Tracer interface. -func (n NoopTracer) StartSpan(operationName string, opts ...StartSpanOption) Span { - return defaultNoopSpan -} - -// Inject belongs to the Tracer interface. -func (n NoopTracer) Inject(sp SpanContext, format interface{}, carrier interface{}) error { - return nil -} - -// Extract belongs to the Tracer interface. -func (n NoopTracer) Extract(format interface{}, carrier interface{}) (SpanContext, error) { - return nil, ErrSpanContextNotFound -} |