github.com/alibaba/sealer@v0.8.6-0.20220430115802-37a2bdaa8173/pkg/image/cache/service.go (about)

     1  // Copyright © 2021 Alibaba Group Holding Ltd.
     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 cache
    16  
    17  import (
    18  	"fmt"
    19  
    20  	"github.com/opencontainers/go-digest"
    21  
    22  	v1 "github.com/alibaba/sealer/types/api/v1"
    23  )
    24  
    25  type Service interface {
    26  	NewCacheLayer(layer v1.Layer, cacheID digest.Digest) Layer
    27  
    28  	CalculateChainID(layers interface{}) (ChainID, error)
    29  }
    30  
    31  type service struct {
    32  }
    33  
    34  func (s *service) NewCacheLayer(layer v1.Layer, cacheID digest.Digest) Layer {
    35  	return Layer{
    36  		CacheID: cacheID.String(),
    37  		Type:    layer.Type,
    38  		Value:   layer.Value,
    39  	}
    40  }
    41  
    42  func (s *service) CalculateChainID(layers interface{}) (ChainID, error) {
    43  	switch ls := layers.(type) {
    44  	case []Layer:
    45  		return CalculateCacheID(ls)
    46  	default:
    47  		return "", fmt.Errorf("do not support calculate chain ID on %v", ls)
    48  	}
    49  }
    50  
    51  func NewService() (Service, error) {
    52  	return &service{}, nil
    53  }