63 lines
1.7 KiB
Go
63 lines
1.7 KiB
Go
// Copyright 2015 PingCAP, 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,
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package variable
|
|
|
|
import (
|
|
"github.com/juju/errors"
|
|
)
|
|
|
|
var statisticsList []Statistics
|
|
var globalStatusScopes = make(map[string]ScopeFlag)
|
|
|
|
// DefaultScopeFlag is the status default scope.
|
|
var DefaultScopeFlag = ScopeGlobal | ScopeSession
|
|
|
|
// StatusVal is the value of the corresponding status variable.
|
|
type StatusVal struct {
|
|
Scope ScopeFlag
|
|
Value interface{}
|
|
}
|
|
|
|
// Statistics is the interface of statistics.
|
|
type Statistics interface {
|
|
// GetScope gets the status variables scope.
|
|
GetScope(status string) ScopeFlag
|
|
// Stats returns the statistics status variables.
|
|
Stats() (map[string]interface{}, error)
|
|
}
|
|
|
|
// RegisterStatistics registers statistics.
|
|
func RegisterStatistics(s Statistics) {
|
|
statisticsList = append(statisticsList, s)
|
|
}
|
|
|
|
// GetStatusVars gets registered statistics status variables.
|
|
func GetStatusVars() (map[string]*StatusVal, error) {
|
|
statusVars := make(map[string]*StatusVal)
|
|
|
|
for _, statistics := range statisticsList {
|
|
vals, err := statistics.Stats()
|
|
if err != nil {
|
|
return nil, errors.Trace(err)
|
|
}
|
|
|
|
for name, val := range vals {
|
|
scope := statistics.GetScope(name)
|
|
statusVars[name] = &StatusVal{Value: val, Scope: scope}
|
|
}
|
|
}
|
|
|
|
return statusVars, nil
|
|
}
|