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Initialize apiCache in once.do

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This commit is contained in:
atvanguard 2020-05-06 16:35:12 +05:30
parent bbe6522f35
commit 54bbdff1e4
1 changed files with 13 additions and 18 deletions
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31
consensus/bor/api.go
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@ -35,6 +35,7 @@ import (
var (
// MaxCheckpointLength is the maximum number of blocks that can be requested for constructing a checkpoint root hash
MaxCheckpointLength = uint64(math.Pow(2, 15))
once sync.Once
)
// API is a user facing RPC API to allow controlling the signer and voting
@ -123,11 +124,18 @@ func (api *API) GetCurrentValidators() ([]*Validator, error) {
// GetRootHash returns the merkle root of the start to end block headers
func (api *API) GetRootHash(start int64, end int64) ([]byte, error) {
key := getKey(start, end)
if root, err := api.lookupCache(key); err != nil {
var err error
once.Do(func() {
if api.rootHashCache == nil {
api.rootHashCache, err = lru.NewARC(10)
}
})
if err != nil {
return nil, err
} else if root != nil {
return root, nil
}
key := getRootHashKey(start, end)
if root, known := api.rootHashCache.Get(key); known {
return root.([]byte), nil
}
length := uint64(end - start + 1)
if length > MaxCheckpointLength {
@ -176,19 +184,6 @@ func (api *API) GetRootHash(start int64, end int64) ([]byte, error) {
return root, nil
}
func (api *API) lookupCache(key string) ([]byte, error) {
var err error
if api.rootHashCache == nil {
if api.rootHashCache, err = lru.NewARC(10); err != nil {
return nil, err
}
}
if root, known := api.rootHashCache.Get(key); known {
return root.([]byte), nil
}
return nil, nil
}
func getKey(start int64, end int64) string {
func getRootHashKey(start int64, end int64) string {
return strconv.FormatInt(start, 10) + "-" + strconv.FormatInt(end, 10)
}