/
metric.go
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/
metric.go
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/*
Copyright 2017 Simon J Mudd
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 discovery
// Collect discovery metrics and manage their storage and retrieval for monitoring purposes.
import (
"time"
"vitess.io/vitess/go/vt/vtorc/inst"
)
// Metric holds a set of information of instance discovery metrics
type Metric struct {
Timestamp time.Time // time the collection was taken
InstanceKey inst.InstanceKey // instance being monitored
BackendLatency time.Duration // time taken talking to the backend
InstanceLatency time.Duration // time taken talking to the instance
TotalLatency time.Duration // total time taken doing the discovery
Err error // error (if applicable) doing the discovery process
}
// When did the metric happen
func (m Metric) When() time.Time {
return m.Timestamp
}