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miniBlocks.go
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miniBlocks.go
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package provider
import (
"github.com/ElrondNetwork/elrond-go-core/core/check"
"github.com/ElrondNetwork/elrond-go-core/data/block"
"github.com/ElrondNetwork/elrond-go-core/marshal"
logger "github.com/ElrondNetwork/elrond-go-logger"
"github.com/ElrondNetwork/elrond-go/dataRetriever"
"github.com/ElrondNetwork/elrond-go/process"
"github.com/ElrondNetwork/elrond-go/storage"
)
var _ process.MiniBlockProvider = (*miniBlockProvider)(nil)
var log = logger.GetOrCreate("dataretriever/getters")
// ArgMiniBlockProvider represents a miniblock data provider argument
type ArgMiniBlockProvider struct {
MiniBlockPool storage.Cacher
MiniBlockStorage storage.Storer
Marshalizer marshal.Marshalizer
}
// miniBlockProvider is able to get data from cache or from storage
type miniBlockProvider struct {
miniBlockPool storage.Cacher
miniBlockStorage storage.Storer
marshalizer marshal.Marshalizer
}
// NewMiniBlockProvider creates a new miniBlockDataGetter instance
func NewMiniBlockProvider(arg ArgMiniBlockProvider) (*miniBlockProvider, error) {
if check.IfNil(arg.Marshalizer) {
return nil, dataRetriever.ErrNilMarshalizer
}
if check.IfNil(arg.MiniBlockPool) {
return nil, dataRetriever.ErrNilMiniblocksPool
}
if check.IfNil(arg.MiniBlockStorage) {
return nil, dataRetriever.ErrNilMiniblocksStorage
}
return &miniBlockProvider{
miniBlockPool: arg.MiniBlockPool,
miniBlockStorage: arg.MiniBlockStorage,
marshalizer: arg.Marshalizer,
}, nil
}
// GetMiniBlocks method returns a list of deserialized mini blocks from a given hash list either from data pool or from storage
func (mbp *miniBlockProvider) GetMiniBlocks(hashes [][]byte) ([]*block.MiniblockAndHash, [][]byte) {
miniBlocksAndHashes := make([]*block.MiniblockAndHash, 0)
missingMiniBlocksHashes := make([][]byte, 0)
for _, hash := range hashes {
miniblock := mbp.getMiniblockFromPool(hash)
if miniblock != nil {
miniBlockAndHash := &block.MiniblockAndHash{
Miniblock: miniblock,
Hash: hash,
}
miniBlocksAndHashes = append(miniBlocksAndHashes, miniBlockAndHash)
continue
}
miniblock = mbp.getMiniBlockFromStorer(hash)
if miniblock != nil {
miniBlockAndHash := &block.MiniblockAndHash{
Miniblock: miniblock,
Hash: hash,
}
miniBlocksAndHashes = append(miniBlocksAndHashes, miniBlockAndHash)
continue
}
missingMiniBlocksHashes = append(missingMiniBlocksHashes, hash)
}
return miniBlocksAndHashes, missingMiniBlocksHashes
}
// GetMiniBlocksFromPool method returns a list of deserialized mini blocks from a given hash list from data pool
func (mbp *miniBlockProvider) GetMiniBlocksFromPool(hashes [][]byte) ([]*block.MiniblockAndHash, [][]byte) {
miniBlocksAndHashes := make([]*block.MiniblockAndHash, 0)
missingMiniBlocksHashes := make([][]byte, 0)
for i := 0; i < len(hashes); i++ {
miniblock := mbp.getMiniblockFromPool(hashes[i])
if miniblock == nil {
missingMiniBlocksHashes = append(missingMiniBlocksHashes, hashes[i])
continue
}
miniBlockAndHash := &block.MiniblockAndHash{
Miniblock: miniblock,
Hash: hashes[i],
}
miniBlocksAndHashes = append(miniBlocksAndHashes, miniBlockAndHash)
}
return miniBlocksAndHashes, missingMiniBlocksHashes
}
func (mbp *miniBlockProvider) getMiniblockFromPool(hash []byte) *block.MiniBlock {
obj, ok := mbp.miniBlockPool.Peek(hash)
if !ok {
log.Trace("missing miniblock in cache",
"hash", hash,
)
return nil
}
miniBlock, ok := obj.(*block.MiniBlock)
if !ok {
log.Warn("miniBlockProvider.getMiniblockFromPool does not contain a miniblock instance",
"hash", hash,
)
}
return miniBlock
}
// getMiniBlocksFromStorer returns a list of mini blocks from storage and a list of missing hashes
func (mbp *miniBlockProvider) getMiniBlockFromStorer(hash []byte) *block.MiniBlock {
buff, err := mbp.miniBlockStorage.Get(hash)
if err != nil {
log.Trace("miniBlockProvider.getMiniBlockFromStorer missing miniblock in storer",
"error", err.Error(),
"hash", hash,
)
return nil
}
miniBlock := &block.MiniBlock{}
err = mbp.marshalizer.Unmarshal(miniBlock, buff)
if err != nil {
log.Warn("miniBlockProvider.getMiniBlockFromStorer marshal error", "error", err.Error())
return nil
}
return miniBlock
}
// IsInterfaceNil returns true if there is no value under the interface
func (mbp *miniBlockProvider) IsInterfaceNil() bool {
return mbp == nil
}