github.com/timstclair/heapster@v0.20.0-alpha1/metrics/sources/factory.go (about)

     1  // Copyright 2015 Google Inc. All Rights Reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package sources
    16  
    17  import (
    18  	"fmt"
    19  
    20  	"k8s.io/heapster/common/flags"
    21  	"k8s.io/heapster/metrics/core"
    22  	"k8s.io/heapster/metrics/sources/kubelet"
    23  )
    24  
    25  type SourceFactory struct {
    26  }
    27  
    28  func (this *SourceFactory) Build(uri flags.Uri) (core.MetricsSourceProvider, error) {
    29  	switch uri.Key {
    30  	case "kubernetes":
    31  		provider, err := kubelet.NewKubeletProvider(&uri.Val)
    32  		return provider, err
    33  	default:
    34  		return nil, fmt.Errorf("Source not recognized: %s", uri.Key)
    35  	}
    36  }
    37  
    38  func (this *SourceFactory) BuildAll(uris flags.Uris) (core.MetricsSourceProvider, error) {
    39  	if len(uris) != 1 {
    40  		return nil, fmt.Errorf("Only one source is supported")
    41  	}
    42  	return this.Build(uris[0])
    43  }
    44  
    45  func NewSourceFactory() *SourceFactory {
    46  	return &SourceFactory{}
    47  }