github.com/kubewharf/katalyst-core@v0.5.3/pkg/controller/resource-recommend/datasource/datasource_proxy.go (about) 1 /* 2 Copyright 2022 The Katalyst Authors. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 package datasource 18 19 import ( 20 "errors" 21 "time" 22 23 datasourcetypes "github.com/kubewharf/katalyst-core/pkg/util/resource-recommend/types/datasource" 24 ) 25 26 type DatasourceType string 27 28 const ( 29 PrometheusDatasource DatasourceType = "Prometheus" 30 ) 31 32 type Datasource interface { 33 QueryTimeSeries(query *datasourcetypes.Query, start time.Time, end time.Time, step time.Duration) (*datasourcetypes.TimeSeries, error) 34 ConvertMetricToQuery(metric datasourcetypes.Metric) (*datasourcetypes.Query, error) 35 } 36 37 type Proxy struct { 38 datasourceMap map[DatasourceType]Datasource 39 } 40 41 func NewProxy() *Proxy { 42 return &Proxy{ 43 datasourceMap: make(map[DatasourceType]Datasource), 44 } 45 } 46 47 func (p *Proxy) RegisterDatasource(name DatasourceType, datasource Datasource) { 48 p.datasourceMap[name] = datasource 49 } 50 51 func (p *Proxy) getDatasource(name DatasourceType) (Datasource, error) { 52 if datasource, ok := p.datasourceMap[name]; ok { 53 return datasource, nil 54 } 55 return nil, errors.New("datasource not found") 56 } 57 58 func (p *Proxy) QueryTimeSeries(DatasourceName DatasourceType, metric datasourcetypes.Metric, start time.Time, end time.Time, step time.Duration) (*datasourcetypes.TimeSeries, error) { 59 datasource, err := p.getDatasource(DatasourceName) 60 if err != nil { 61 return nil, err 62 } 63 query, err := datasource.ConvertMetricToQuery(metric) 64 if err != nil { 65 return nil, err 66 } 67 return datasource.QueryTimeSeries(query, start, end, step) 68 }