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streams.go
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streams.go
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// Copyright 2019-present Open Networking Foundation.
//
// 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 storage
import (
streams "github.com/atomix/atomix-go-framework/pkg/atomix/stream"
"sync"
)
type streamID uint64
// newStreamManager returns a new stream manager
func newStreamManager() *streamManager {
return &streamManager{
streams: make(map[streamID]streams.WriteStream),
}
}
// streamManager is a manager of client streams
type streamManager struct {
streams map[streamID]streams.WriteStream
nextID streamID
mu sync.RWMutex
}
// addStream adds a new stream
func (r *streamManager) addStream(stream streams.WriteStream) streamID {
r.mu.Lock()
defer r.mu.Unlock()
r.nextID++
streamID := r.nextID
r.streams[streamID] = stream
return streamID
}
// removeStream removes a stream by ID
func (r *streamManager) removeStream(streamID streamID) {
r.mu.Lock()
defer r.mu.Unlock()
delete(r.streams, streamID)
}
// getStream gets a stream by ID
func (r *streamManager) getStream(streamID streamID) streams.WriteStream {
r.mu.RLock()
defer r.mu.RUnlock()
stream, ok := r.streams[streamID]
if ok {
return stream
}
return streams.NewNilStream()
}