123 lines
3.1 KiB
Go
123 lines
3.1 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 events
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import (
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"context"
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api "github.com/containerd/containerd/api/services/events/v1"
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apittrpc "github.com/containerd/containerd/api/services/ttrpc/events/v1"
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"github.com/containerd/containerd/errdefs"
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"github.com/containerd/containerd/events"
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"github.com/containerd/containerd/events/exchange"
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"github.com/containerd/containerd/plugin"
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"github.com/containerd/ttrpc"
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ptypes "github.com/gogo/protobuf/types"
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"github.com/pkg/errors"
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"google.golang.org/grpc"
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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: "events",
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InitFn: func(ic *plugin.InitContext) (interface{}, error) {
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return NewService(ic.Events), nil
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},
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})
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}
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type service struct {
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ttService *ttrpcService
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events *exchange.Exchange
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}
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// NewService returns the GRPC events server
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func NewService(events *exchange.Exchange) api.EventsServer {
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return &service{
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ttService: &ttrpcService{
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events: events,
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},
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events: events,
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}
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}
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func (s *service) Register(server *grpc.Server) error {
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api.RegisterEventsServer(server, s)
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return nil
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}
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func (s *service) RegisterTTRPC(server *ttrpc.Server) error {
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apittrpc.RegisterEventsService(server, s.ttService)
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return nil
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}
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func (s *service) Publish(ctx context.Context, r *api.PublishRequest) (*ptypes.Empty, error) {
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if err := s.events.Publish(ctx, r.Topic, r.Event); err != nil {
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return nil, errdefs.ToGRPC(err)
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}
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return &ptypes.Empty{}, nil
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}
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func (s *service) Forward(ctx context.Context, r *api.ForwardRequest) (*ptypes.Empty, error) {
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if err := s.events.Forward(ctx, fromProto(r.Envelope)); err != nil {
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return nil, errdefs.ToGRPC(err)
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}
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return &ptypes.Empty{}, nil
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}
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func (s *service) Subscribe(req *api.SubscribeRequest, srv api.Events_SubscribeServer) error {
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ctx, cancel := context.WithCancel(srv.Context())
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defer cancel()
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eventq, errq := s.events.Subscribe(ctx, req.Filters...)
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for {
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select {
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case ev := <-eventq:
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if err := srv.Send(toProto(ev)); err != nil {
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return errors.Wrapf(err, "failed sending event to subscriber")
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}
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case err := <-errq:
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if err != nil {
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return errors.Wrapf(err, "subscription error")
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}
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return nil
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}
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}
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}
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func toProto(env *events.Envelope) *api.Envelope {
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return &api.Envelope{
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Timestamp: env.Timestamp,
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Namespace: env.Namespace,
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Topic: env.Topic,
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Event: env.Event,
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}
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}
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func fromProto(env *api.Envelope) *events.Envelope {
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return &events.Envelope{
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Timestamp: env.Timestamp,
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Namespace: env.Namespace,
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Topic: env.Topic,
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Event: env.Event,
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}
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}
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