github.com/containerd/containerd@v22.0.0-20200918172823-438c87b8e050+incompatible/services/diff/service.go (about)

     1  /*
     2     Copyright The containerd 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 diff
    18  
    19  import (
    20  	"context"
    21  
    22  	diffapi "github.com/containerd/containerd/api/services/diff/v1"
    23  	"github.com/containerd/containerd/plugin"
    24  	"github.com/containerd/containerd/services"
    25  	"github.com/pkg/errors"
    26  	"google.golang.org/grpc"
    27  )
    28  
    29  func init() {
    30  	plugin.Register(&plugin.Registration{
    31  		Type: plugin.GRPCPlugin,
    32  		ID:   "diff",
    33  		Requires: []plugin.Type{
    34  			plugin.ServicePlugin,
    35  		},
    36  		InitFn: func(ic *plugin.InitContext) (interface{}, error) {
    37  			plugins, err := ic.GetByType(plugin.ServicePlugin)
    38  			if err != nil {
    39  				return nil, err
    40  			}
    41  			p, ok := plugins[services.DiffService]
    42  			if !ok {
    43  				return nil, errors.New("diff service not found")
    44  			}
    45  			i, err := p.Instance()
    46  			if err != nil {
    47  				return nil, err
    48  			}
    49  			return &service{local: i.(diffapi.DiffClient)}, nil
    50  		},
    51  	})
    52  }
    53  
    54  type service struct {
    55  	local diffapi.DiffClient
    56  }
    57  
    58  var _ diffapi.DiffServer = &service{}
    59  
    60  func (s *service) Register(gs *grpc.Server) error {
    61  	diffapi.RegisterDiffServer(gs, s)
    62  	return nil
    63  }
    64  
    65  func (s *service) Apply(ctx context.Context, er *diffapi.ApplyRequest) (*diffapi.ApplyResponse, error) {
    66  	return s.local.Apply(ctx, er)
    67  }
    68  
    69  func (s *service) Diff(ctx context.Context, dr *diffapi.DiffRequest) (*diffapi.DiffResponse, error) {
    70  	return s.local.Diff(ctx, dr)
    71  }