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storage.go
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/
storage.go
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package filter
import (
"sync"
"github.com/zeiss/typhoon/pkg/routing/eventfilter/cel"
"k8s.io/apimachinery/pkg/types"
)
type (
filterGenerations map[int64]cel.ConditionalFilter
filterUIDs map[types.UID]filterGenerations
)
type expressionStorage struct {
*sync.RWMutex
filterUIDs
}
func newExpressionStorage() *expressionStorage {
return &expressionStorage{
RWMutex: &sync.RWMutex{},
filterUIDs: make(filterUIDs),
}
}
func (f *expressionStorage) get(uid types.UID, generation int64) (cel.ConditionalFilter, bool) {
f.RLock()
defer f.RUnlock()
filterGens, exist := f.filterUIDs[uid]
if !exist {
return cel.ConditionalFilter{}, false
}
filter, exist := filterGens[generation]
return filter, exist
}
// set method overrides previous generations of compiled expressions
func (f *expressionStorage) set(uid types.UID, generation int64, condition cel.ConditionalFilter) {
f.Lock()
defer f.Unlock()
f.filterUIDs[uid] = filterGenerations{
generation: condition,
}
}