6f64cb8598
Signed-off-by: Derek McGowan <derek@mcg.dev> Transfer service implementation Signed-off-by: Derek McGowan <derek@mcg.dev>
85 lines
2.3 KiB
Go
85 lines
2.3 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package transfer
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import (
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"context"
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transferapi "github.com/containerd/containerd/api/services/transfer/v1"
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"github.com/containerd/containerd/errdefs"
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"github.com/containerd/containerd/pkg/transfer"
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"github.com/containerd/containerd/plugin"
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"google.golang.org/grpc"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/status"
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"google.golang.org/protobuf/types/known/emptypb"
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)
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func init() {
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plugin.Register(&plugin.Registration{
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Type: plugin.GRPCPlugin,
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ID: "transfer",
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Requires: []plugin.Type{
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plugin.TransferPlugin,
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},
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InitFn: newService,
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})
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}
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type service struct {
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transferers []transfer.Transferer
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transferapi.UnimplementedTransferServer
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}
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func newService(ic *plugin.InitContext) (interface{}, error) {
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plugins, err := ic.GetByType(plugin.TransferPlugin)
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if err != nil {
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return nil, err
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}
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// TODO: how to determine order?
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t := make([]transfer.Transferer, 0, len(plugins))
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for _, p := range plugins {
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i, err := p.Instance()
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if err != nil {
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return nil, err
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}
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t = append(t, i.(transfer.Transferer))
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}
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return &service{
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transferers: t,
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}, nil
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}
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func (s *service) Register(gs *grpc.Server) error {
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transferapi.RegisterTransferServer(gs, s)
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return nil
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}
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func (s *service) Transfer(ctx context.Context, req *transferapi.TransferRequest) (*emptypb.Empty, error) {
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// TODO: Optionally proxy
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// TODO: Convert options
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for _, t := range s.transferers {
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if err := t.Transfer(ctx, req.Source, req.Destination); err == nil {
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return nil, nil
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} else if !errdefs.IsNotImplemented(err) {
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return nil, errdefs.ToGRPC(err)
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}
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}
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return nil, status.Errorf(codes.Unimplemented, "method Transfer not implemented for %s to %s", req.Source.GetTypeUrl(), req.Destination.GetTypeUrl())
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}
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