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metrics_decorator.go
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/
metrics_decorator.go
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// Copyright (c) 2018 The Jaeger Authors.
//
// Licensed 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 processor
import (
"io"
"time"
"github.com/jaegertracing/jaeger/pkg/metrics"
)
type metricsDecorator struct {
errors metrics.Counter
latency metrics.Timer
processor SpanProcessor
io.Closer
}
// NewDecoratedProcessor returns a processor with metrics
func NewDecoratedProcessor(f metrics.Factory, processor SpanProcessor) SpanProcessor {
m := f.Namespace(metrics.NSOptions{Name: "span-processor", Tags: nil})
return &metricsDecorator{
errors: m.Counter(metrics.Options{Name: "errors", Tags: nil}),
latency: m.Timer(metrics.TimerOptions{Name: "latency", Tags: nil}),
processor: processor,
}
}
func (d *metricsDecorator) Process(message Message) error {
now := time.Now()
err := d.processor.Process(message)
d.latency.Record(time.Since(now))
if err != nil {
d.errors.Inc(1)
}
return err
}