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load_store_wrapper.go
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load_store_wrapper.go
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/*
*
* Copyright 2019 gRPC 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 edsbalancer
import (
"sync"
"google.golang.org/grpc/xds/internal/client/load"
)
type loadStoreWrapper struct {
mu sync.RWMutex
service string
// Both store and perCluster will be nil if load reporting is disabled (EDS
// response doesn't have LRS server name). Note that methods on Store and
// perCluster all handle nil, so there's no need to check nil before calling
// them.
store *load.Store
perCluster load.PerClusterReporter
}
func (lsw *loadStoreWrapper) updateServiceName(service string) {
lsw.mu.Lock()
defer lsw.mu.Unlock()
if lsw.service == service {
return
}
lsw.service = service
lsw.perCluster = lsw.store.PerCluster(lsw.service, "")
}
func (lsw *loadStoreWrapper) updateLoadStore(store *load.Store) {
lsw.mu.Lock()
defer lsw.mu.Unlock()
if store == lsw.store {
return
}
lsw.store = store
lsw.perCluster = lsw.store.PerCluster(lsw.service, "")
}
func (lsw *loadStoreWrapper) CallStarted(locality string) {
lsw.mu.RLock()
defer lsw.mu.RUnlock()
if lsw.perCluster != nil {
lsw.perCluster.CallStarted(locality)
}
}
func (lsw *loadStoreWrapper) CallFinished(locality string, err error) {
lsw.mu.RLock()
defer lsw.mu.RUnlock()
if lsw.perCluster != nil {
lsw.perCluster.CallFinished(locality, err)
}
}
func (lsw *loadStoreWrapper) CallServerLoad(locality, name string, val float64) {
lsw.mu.RLock()
defer lsw.mu.RUnlock()
if lsw.perCluster != nil {
lsw.perCluster.CallServerLoad(locality, name, val)
}
}
func (lsw *loadStoreWrapper) CallDropped(category string) {
lsw.mu.RLock()
defer lsw.mu.RUnlock()
if lsw.perCluster != nil {
lsw.perCluster.CallDropped(category)
}
}