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tracer.go
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tracer.go
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// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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 modelprocessor
import (
"context"
"go.opentelemetry.io/otel/codes"
"go.opentelemetry.io/otel/trace"
"github.com/elastic/apm-data/model/modelpb"
)
const instrumentationName = "github.com/elastic/apm-data/model/modelprocessor"
// Tracer is a model.BatchProcessor that wraps another processor within a
// transaction.
type Tracer struct {
tracer trace.Tracer
processor modelpb.BatchProcessor
spanName string
}
// NewTracer returns a Tracer that emits transactions for batches processed.
func NewTracer(n string, p modelpb.BatchProcessor, opts ...ConfigOption) *Tracer {
cfg := newConfig(opts...)
return &Tracer{
spanName: n,
processor: p,
tracer: cfg.tracerProvider.Tracer(instrumentationName),
}
}
// ProcessBatch runs for each batch run, and emits telemetry
func (c *Tracer) ProcessBatch(ctx context.Context, b *modelpb.Batch) error {
ctx, span := c.tracer.Start(ctx, c.spanName)
defer span.End()
err := c.processor.ProcessBatch(ctx, b)
if err != nil {
span.SetStatus(codes.Error, err.Error())
span.RecordError(err)
}
return err
}