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distributor.go
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distributor.go
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// Copyright 2018 Istio Authors
//
// 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 runtime
import (
"sync"
sn "istio.io/istio/galley/pkg/mcp/snapshot"
)
// Distributor interface allows processor to distribute snapshots of configuration.
type Distributor interface {
SetSnapshot(name string, snapshot sn.Snapshot)
ClearSnapshot(name string)
}
// InMemoryDistributor is an in-memory distributor implementation.
type InMemoryDistributor struct {
snapshotsLock sync.Mutex
snapshots map[string]sn.Snapshot
}
var _ Distributor = &InMemoryDistributor{}
// NewInMemoryDistributor returns a new instance of InMemoryDistributor
func NewInMemoryDistributor() *InMemoryDistributor {
return &InMemoryDistributor{
snapshots: make(map[string]sn.Snapshot),
}
}
// SetSnapshot is an implementation of Distributor.SetSnapshot
func (d *InMemoryDistributor) SetSnapshot(name string, snapshot sn.Snapshot) {
d.snapshotsLock.Lock()
defer d.snapshotsLock.Unlock()
d.snapshots[name] = snapshot
}
// ClearSnapshot is an implementation of Distributor.ClearSnapshot
func (d *InMemoryDistributor) ClearSnapshot(name string) {
d.snapshotsLock.Lock()
defer d.snapshotsLock.Unlock()
delete(d.snapshots, name)
}