minio/cmd/gateway-metrics.go

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/*
* MinIO Cloud Storage, (C) 2019 MinIO, Inc.
*
* 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 cmd
import (
"net/http"
"go.uber.org/atomic"
)
// RequestStats - counts for Get and Head requests
type RequestStats struct {
Get atomic.Uint64 `json:"Get"`
Head atomic.Uint64 `json:"Head"`
}
// Metrics - represents bytes served from backend
// only implemented for S3 Gateway
type Metrics struct {
bytesReceived atomic.Uint64
bytesSent atomic.Uint64
requestStats RequestStats
}
// IncBytesReceived - Increase total bytes received from gateway backend
func (s *Metrics) IncBytesReceived(n int64) {
s.bytesReceived.Add(uint64(n))
}
// GetBytesReceived - Get total bytes received from gateway backend
func (s *Metrics) GetBytesReceived() uint64 {
return s.bytesReceived.Load()
}
// IncBytesSent - Increase total bytes sent to gateway backend
func (s *Metrics) IncBytesSent(n int64) {
s.bytesSent.Add(uint64(n))
}
// GetBytesSent - Get total bytes received from gateway backend
func (s *Metrics) GetBytesSent() uint64 {
return s.bytesSent.Load()
}
// IncRequests - Increase request count sent to gateway backend by 1
func (s *Metrics) IncRequests(method string) {
// Only increment for Head & Get requests, else no op
if method == http.MethodGet {
s.requestStats.Get.Add(1)
} else if method == http.MethodHead {
s.requestStats.Head.Add(1)
}
}
// GetRequests - Get total number of Get & Headrequests sent to gateway backend
func (s *Metrics) GetRequests() RequestStats {
return s.requestStats
}
// NewMetrics - Prepare new Metrics structure
func NewMetrics() *Metrics {
return &Metrics{}
}