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counter.go
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counter.go
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/*
* Copyright 2021 The Gort 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 telemetry
import (
"context"
"fmt"
"os"
log "github.com/sirupsen/logrus"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/metric"
)
// Define our labels here so that we can easily reuse them.
var defaultLabels = []attribute.KeyValue{
attribute.Key("application").String(ServiceName),
attribute.Key("container_id").String(os.Getenv("HOSTNAME")),
}
func newCounter(mc metric.Int64Counter) *MetricCounter {
attributes := append([]attribute.KeyValue{}, defaultLabels...)
return &MetricCounter{attributes, mc, 1}
}
type MetricCounter struct {
attributes []attribute.KeyValue
counter metric.Int64Counter
value int64
}
func (c *MetricCounter) Commit(ctx context.Context) {
c.counter.Add(ctx, c.value, c.attributes...)
}
func (c *MetricCounter) WithAttribute(key string, value interface{}) *MetricCounter {
switch v := value.(type) {
case bool:
c.attributes = append(c.attributes, attribute.Key(key).Bool(v))
case int:
c.attributes = append(c.attributes, attribute.Key(key).Int(v))
case int64:
c.attributes = append(c.attributes, attribute.Key(key).Int64(v))
case float64:
c.attributes = append(c.attributes, attribute.Key(key).Float64(v))
case string:
c.attributes = append(c.attributes, attribute.Key(key).String(v))
case []string:
c.attributes = append(c.attributes, attribute.Key(key).Array(v))
default:
panic(fmt.Sprintf("unsupported values type: %T", value))
}
return c
}
func (c *MetricCounter) WithEntryFields(e log.Entry) *MetricCounter {
for k, v := range e.Data {
c.WithAttribute(k, v)
}
return c
}
func (c *MetricCounter) WithError(err error) *MetricCounter {
return c.WithAttribute("error", err.Error())
}
func (c *MetricCounter) WithValue(value int64) *MetricCounter {
c.value = value
return c
}