/
status_code.go
68 lines (56 loc) · 1.89 KB
/
status_code.go
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package sampling // import "github.com/open-telemetry/opentelemetry-collector-contrib/processor/tailsamplingprocessor/internal/sampling"
import (
"context"
"errors"
"fmt"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/pdata/pcommon"
"go.opentelemetry.io/collector/pdata/ptrace"
"go.uber.org/zap"
)
type statusCodeFilter struct {
logger *zap.Logger
statusCodes []ptrace.StatusCode
}
var _ PolicyEvaluator = (*statusCodeFilter)(nil)
// NewStatusCodeFilter creates a policy evaluator that samples all traces with
// a given status code.
func NewStatusCodeFilter(settings component.TelemetrySettings, statusCodeString []string) (PolicyEvaluator, error) {
if len(statusCodeString) == 0 {
return nil, errors.New("expected at least one status code to filter on")
}
statusCodes := make([]ptrace.StatusCode, len(statusCodeString))
for i := range statusCodeString {
switch statusCodeString[i] {
case "OK":
statusCodes[i] = ptrace.StatusCodeOk
case "ERROR":
statusCodes[i] = ptrace.StatusCodeError
case "UNSET":
statusCodes[i] = ptrace.StatusCodeUnset
default:
return nil, fmt.Errorf("unknown status code %q, supported: OK, ERROR, UNSET", statusCodeString[i])
}
}
return &statusCodeFilter{
logger: settings.Logger,
statusCodes: statusCodes,
}, nil
}
// Evaluate looks at the trace data and returns a corresponding SamplingDecision.
func (r *statusCodeFilter) Evaluate(_ context.Context, _ pcommon.TraceID, trace *TraceData) (Decision, error) {
r.logger.Debug("Evaluating spans in status code filter")
trace.Lock()
batches := trace.ReceivedBatches
trace.Unlock()
return hasSpanWithCondition(batches, func(span ptrace.Span) bool {
for _, statusCode := range r.statusCodes {
if span.Status().Code() == statusCode {
return true
}
}
return false
}), nil
}