frostfs-s3-gw/pkg/madmin/top-commands.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 madmin
import (
"context"
"encoding/json"
"io/ioutil"
"net/http"
"time"
)
// LockEntry holds information about client requesting the lock,
// servers holding the lock, source on the client machine,
// ID, type(read or write) and time stamp.
type LockEntry struct {
Timestamp time.Time `json:"time"` // Timestamp set at the time of initialization.
Resource string `json:"resource"` // Resource contains info like bucket, object etc
Type string `json:"type"` // Bool whether write or read lock.
Source string `json:"source"` // Source which created the lock
ServerList []string `json:"serverlist"` // RPC path of servers issuing the lock.
Owner string `json:"owner"` // RPC path of client claiming lock.
ID string `json:"id"` // UID to uniquely identify request of client.
}
// LockEntries - To sort the locks
type LockEntries []LockEntry
func (l LockEntries) Len() int {
return len(l)
}
func (l LockEntries) Less(i, j int) bool {
return l[i].Timestamp.Before(l[j].Timestamp)
}
func (l LockEntries) Swap(i, j int) {
l[i], l[j] = l[j], l[i]
}
// TopLocks - returns the oldest locks in a minio setup.
func (adm *AdminClient) TopLocks(ctx context.Context) (LockEntries, error) {
// Execute GET on /minio/admin/v3/top/locks
// to get the oldest locks in a minio setup.
resp, err := adm.executeMethod(ctx,
http.MethodGet,
requestData{relPath: adminAPIPrefix + "/top/locks"},
)
defer closeResponse(resp)
if err != nil {
return nil, err
}
if resp.StatusCode != http.StatusOK {
return nil, httpRespToErrorResponse(resp)
}
response, err := ioutil.ReadAll(resp.Body)
if err != nil {
return LockEntries{}, err
}
var lockEntries LockEntries
err = json.Unmarshal(response, &lockEntries)
return lockEntries, err
}