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mirror of https://github.com/open-telemetry/opentelemetry-go.git synced 2024-12-10 09:50:58 +02:00
opentelemetry-go/api/trace/noop_trace.go
rghetia 83935b2558
Add propagator interface and W3C propagator (#85)
* add propagation api.

* add http propagator interface and w3c propagator implementation.

* remove Extract api from trace.

* remove Extract interface for tracer.

* fix copyright.

* fix variable names and comments.

* move inject/extract out of trace.

* replace INVALID_SPAN_CONTEXT with EmptySpanContext function.

* fix tag.Map.

* make carrier as interface instead of http.Request.

* rename structs and update doc comments..

* add doc.go

* update doc.

* add noop propagator.

* add new propagation api with Supplier interface.
- added Default Tracer which simply propagates SpanContext.
- added CopyOfRemote option to simply create remote span.

* remove old propagator.

* rename propagator to TextFormatPropagator.

* rename default tracer/span as pass_through tracer/span.

* add test for pass through tracer.

* add missing interface to pass through tracer.

* return SpanContext instead of contex.Context from Extract interface.
- also remove PassThroughTracer

* fix review comments.

* add more test cases for traceContext extraction.

* remove tidy temporarily from circle-ci target to avoid build failure.

* allow header ending in dash '-'.

* add inject test for non-zero value other than 01 for traceoption

* add AddLink and Link interface to MockSpan

* fix running go mod tidy on every build.
2019-09-23 11:51:32 -07:00

52 lines
1.5 KiB
Go

// Copyright 2019, OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package trace
import (
"context"
"go.opentelemetry.io/api/core"
)
type NoopTracer struct{}
var _ Tracer = NoopTracer{}
// WithResources does nothing and returns noop implementation of Tracer.
func (t NoopTracer) WithResources(attributes ...core.KeyValue) Tracer {
return t
}
// WithComponent does nothing and returns noop implementation of Tracer.
func (t NoopTracer) WithComponent(name string) Tracer {
return t
}
// WithService does nothing and returns noop implementation of Tracer.
func (t NoopTracer) WithService(name string) Tracer {
return t
}
// WithSpan wraps around execution of func with noop span.
func (t NoopTracer) WithSpan(ctx context.Context, name string, body func(context.Context) error) error {
return body(ctx)
}
// Start starts a noop span.
func (NoopTracer) Start(ctx context.Context, name string, opts ...SpanOption) (context.Context, Span) {
span := NoopSpan{}
return SetCurrentSpan(ctx, span), span
}