59 lines
1.2 KiB
Go
59 lines
1.2 KiB
Go
// Package tracer provides an interface for distributed tracing
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package tracer
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import (
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"context"
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"time"
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"github.com/unistack-org/micro/v3/metadata"
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)
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var (
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// DefaultTracer is the global default tracer
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DefaultTracer Tracer = NewTracer()
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)
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// Tracer is an interface for distributed tracing
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type Tracer interface {
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Name() string
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Init(...Option) error
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// Start a trace
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Start(ctx context.Context, name string) (context.Context, *Span)
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// Finish the trace
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Finish(*Span) error
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// Lookup get span from context
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Lookup(ctx context.Context) (*Span, error)
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// Read the traces
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Read(...ReadOption) ([]*Span, error)
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}
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// SpanType describe the nature of the trace span
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type SpanType int
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const (
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// SpanTypeRequestInbound is a span created when serving a request
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SpanTypeRequestInbound SpanType = iota
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// SpanTypeRequestOutbound is a span created when making a service call
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SpanTypeRequestOutbound
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)
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// Span is used to record an entry
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type Span struct {
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// Id of the trace
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Trace string
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// name of the span
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Name string
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// id of the span
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Id string
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// parent span id
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Parent string
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// Start time
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Started time.Time
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// Duration in nano seconds
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Duration time.Duration
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// associated data
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Metadata metadata.Metadata
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// Type
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Type SpanType
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}
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