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subscription.go
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subscription.go
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// Copyright 2023 LiveKit, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package bus
import (
"google.golang.org/protobuf/proto"
"github.com/livekit/psrpc/internal/logger"
)
type Subscription[MessageType proto.Message] interface {
Channel() <-chan MessageType
Close() error
}
type subscription[MessageType proto.Message] struct {
Reader
c <-chan MessageType
}
func newSubscription[MessageType proto.Message](sub Reader, size int) Subscription[MessageType] {
msgChan := make(chan MessageType, size)
go func() {
for {
b, ok := sub.read()
if !ok {
close(msgChan)
return
}
p, err := deserialize(b)
if err != nil {
logger.Error(err, "failed to deserialize message")
continue
}
msgChan <- p.(MessageType)
}
}()
return &subscription[MessageType]{
Reader: sub,
c: msgChan,
}
}
func (s *subscription[MessageType]) Channel() <-chan MessageType {
return s.c
}