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package basictracer
import "sync"
// A SpanRecorder handles all of the `RawSpan` data generated via an
// associated `Tracer` (see `NewStandardTracer`) instance. It also names
// the containing process and provides access to a straightforward tag map.
type SpanRecorder interface {
// Implementations must determine whether and where to store `span`.
RecordSpan(span RawSpan)
}
// InMemorySpanRecorder is a simple thread-safe implementation of
// SpanRecorder that stores all reported spans in memory, accessible
// via reporter.GetSpans(). It is primarily intended for testing purposes.
type InMemorySpanRecorder struct {
sync.RWMutex
spans []RawSpan
}
// NewInMemoryRecorder creates new InMemorySpanRecorder
func NewInMemoryRecorder() *InMemorySpanRecorder {
return new(InMemorySpanRecorder)
}
// RecordSpan implements the respective method of SpanRecorder.
func (r *InMemorySpanRecorder) RecordSpan(span RawSpan) {
r.Lock()
defer r.Unlock()
r.spans = append(r.spans, span)
}
// GetSpans returns a copy of the array of spans accumulated so far.
func (r *InMemorySpanRecorder) GetSpans() []RawSpan {
r.RLock()
defer r.RUnlock()
spans := make([]RawSpan, len(r.spans))
copy(spans, r.spans)
return spans
}
// GetSampledSpans returns a slice of spans accumulated so far which were sampled.
func (r *InMemorySpanRecorder) GetSampledSpans() []RawSpan {
r.RLock()
defer r.RUnlock()
spans := make([]RawSpan, 0, len(r.spans))
for _, span := range r.spans {
if span.Context.Sampled {
spans = append(spans, span)
}
}
return spans
}
// Reset clears the internal array of spans.
func (r *InMemorySpanRecorder) Reset() {
r.Lock()
defer r.Unlock()
r.spans = nil
}
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