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template_cache.go
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/
template_cache.go
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// Copyright 2017 Google Inc. All Rights Reserved.
// 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 nfserver
import (
"sync"
"github.com/taktv6/tflow2/nf9"
)
type templateCache struct {
cache map[uint32]map[uint32]map[uint16]nf9.TemplateRecords
lock sync.RWMutex
}
// newTemplateCache creates and initializes a new `templateCache` instance
func newTemplateCache() *templateCache {
return &templateCache{cache: make(map[uint32]map[uint32]map[uint16]nf9.TemplateRecords)}
}
func (c *templateCache) set(rtr uint32, sourceID uint32, templateID uint16, records nf9.TemplateRecords) {
c.lock.Lock()
defer c.lock.Unlock()
if _, ok := c.cache[rtr]; !ok {
c.cache[rtr] = make(map[uint32]map[uint16]nf9.TemplateRecords)
}
if _, ok := c.cache[rtr][sourceID]; !ok {
c.cache[rtr][sourceID] = make(map[uint16]nf9.TemplateRecords)
}
c.cache[rtr][sourceID][templateID] = records
}
func (c *templateCache) get(rtr uint32, sourceID uint32, templateID uint16) *nf9.TemplateRecords {
c.lock.RLock()
defer c.lock.RUnlock()
if _, ok := c.cache[rtr]; !ok {
return nil
}
if _, ok := c.cache[rtr][sourceID]; !ok {
return nil
}
if _, ok := c.cache[rtr][sourceID][templateID]; !ok {
return nil
}
ret := c.cache[rtr][sourceID][templateID]
return &ret
}