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62 lines
1.7 KiB
62 lines
1.7 KiB
// Copyright 2015 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package variable
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import (
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"github.com/juju/errors"
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)
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var statisticsList []Statistics
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var globalStatusScopes = make(map[string]ScopeFlag)
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// DefaultScopeFlag is the status default scope.
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var DefaultScopeFlag = ScopeGlobal | ScopeSession
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// StatusVal is the value of the corresponding status variable.
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type StatusVal struct {
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Scope ScopeFlag
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Value interface{}
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}
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// Statistics is the interface of statistics.
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type Statistics interface {
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// GetScope gets the status variables scope.
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GetScope(status string) ScopeFlag
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// Stats returns the statistics status variables.
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Stats() (map[string]interface{}, error)
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}
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// RegisterStatistics registers statistics.
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func RegisterStatistics(s Statistics) {
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statisticsList = append(statisticsList, s)
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}
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// GetStatusVars gets registered statistics status variables.
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func GetStatusVars() (map[string]*StatusVal, error) {
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statusVars := make(map[string]*StatusVal)
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for _, statistics := range statisticsList {
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vals, err := statistics.Stats()
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if err != nil {
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return nil, errors.Trace(err)
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}
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for name, val := range vals {
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scope := statistics.GetScope(name)
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statusVars[name] = &StatusVal{Value: val, Scope: scope}
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}
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}
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return statusVars, nil
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}
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