| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 quota |
| |
| import ( |
| "context" |
| "errors" |
| "fmt" |
| |
| "github.com/apache/servicecomb-service-center/pkg/log" |
| "github.com/apache/servicecomb-service-center/pkg/plugin" |
| pb "github.com/go-chassis/cari/discovery" |
| ) |
| |
| const QUOTA plugin.Kind = "quota" |
| |
| type Manager interface { |
| RemandQuotas(ctx context.Context, t ResourceType) |
| GetQuota(ctx context.Context, t ResourceType) int64 |
| Usage(ctx context.Context, req *Request) (int64, error) |
| } |
| |
| func GetQuota(ctx context.Context, resourceType ResourceType) int64 { |
| return plugin.Plugins().Instance(QUOTA).(Manager).GetQuota(ctx, resourceType) |
| } |
| |
| func Remand(ctx context.Context, resourceType ResourceType) { |
| plugin.Plugins().Instance(QUOTA).(Manager).RemandQuotas(ctx, resourceType) |
| } |
| |
| func Usage(ctx context.Context, req *Request) (int64, error) { |
| return plugin.Plugins().Instance(QUOTA).(Manager).Usage(ctx, req) |
| } |
| |
| // Apply 申请配额sourceType serviceinstance servicetype |
| func Apply(ctx context.Context, res *Request) error { |
| if res == nil { |
| err := errors.New("invalid parameters") |
| log.Error("quota check failed", err) |
| return pb.NewError(pb.ErrInternal, err.Error()) |
| } |
| |
| resourceType := res.QuotaType |
| limitQuota := GetQuota(ctx, resourceType) |
| curNum, err := Usage(ctx, res) |
| if err != nil { |
| log.Error(fmt.Sprintf("%s quota check failed", resourceType), err) |
| return err |
| } |
| if curNum+res.QuotaSize > limitQuota { |
| mes := fmt.Sprintf("no quota to create %s, max num is %d, curNum is %d, apply num is %d", |
| resourceType, limitQuota, curNum, res.QuotaSize) |
| log.Error(mes, nil) |
| return pb.NewError(pb.ErrNotEnoughQuota, mes) |
| } |
| return nil |
| } |