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504de27b36
This adds the ability to tie a background context to the context that created it in traces, and also cleans up and annotates the context used in type checking. This gives us detailed connected traces of all the type checking and parsing logic. Change-Id: I32721220a50ecb9b4404a4e9354343389d7a5219 Reviewed-on: https://go-review.googlesource.com/c/tools/+/183757 Reviewed-by: Rebecca Stambler <rstambler@golang.org>
61 lines
2.4 KiB
Go
61 lines
2.4 KiB
Go
// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package tag adds support for telemetry tracins.
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package trace
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import (
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"context"
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)
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type Span interface {
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AddAttributes(attributes ...Attribute)
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AddMessageReceiveEvent(messageID, uncompressedByteSize, compressedByteSize int64)
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AddMessageSendEvent(messageID, uncompressedByteSize, compressedByteSize int64)
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Annotate(attributes []Attribute, str string)
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Annotatef(attributes []Attribute, format string, a ...interface{})
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End()
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IsRecordingEvents() bool
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SetName(name string)
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SetStatus(status Status)
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}
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type Attribute interface{}
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type Status struct {
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Code int32
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Message string
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}
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type nullSpan struct{}
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func (nullSpan) AddAttributes(attributes ...Attribute) {}
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func (nullSpan) AddMessageReceiveEvent(messageID, uncompressedByteSize, compressedByteSize int64) {}
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func (nullSpan) AddMessageSendEvent(messageID, uncompressedByteSize, compressedByteSize int64) {}
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func (nullSpan) Annotate(attributes []Attribute, str string) {}
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func (nullSpan) Annotatef(attributes []Attribute, format string, a ...interface{}) {}
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func (nullSpan) End() {}
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func (nullSpan) IsRecordingEvents() bool { return false }
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func (nullSpan) SetName(name string) {}
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func (nullSpan) SetStatus(status Status) {}
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var (
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FromContext = func(ctx context.Context) Span { return nullSpan{} }
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NewContext = func(ctx context.Context, span Span) context.Context { return ctx }
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StartSpan = func(ctx context.Context, name string, options ...interface{}) (context.Context, Span) {
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return ctx, nullSpan{}
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}
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BoolAttribute = func(key string, value bool) Attribute { return nil }
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Float64Attribute = func(key string, value float64) Attribute { return nil }
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Int64Attribute = func(key string, value int64) Attribute { return nil }
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StringAttribute = func(key string, value string) Attribute { return nil }
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WithSpanKind = func(spanKind int) interface{} { return nil }
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)
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const (
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SpanKindUnspecified = iota
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SpanKindServer
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SpanKindClient
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)
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