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[#32] Add CouchDB implementation for block storage
Signed-off-by: Firas Qutishat <[email protected]> Signed-off-by: sudesh.shetty <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| /* | ||
| Copyright SecureKey Technologies Inc. All Rights Reserved. | ||
| SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
|
||
| package cdbblkstorage | ||
|
|
||
| import ( | ||
| "github.com/pkg/errors" | ||
|
|
||
| "github.com/hyperledger/fabric/protos/common" | ||
| "github.com/hyperledger/fabric/protoutil" | ||
| ) | ||
|
|
||
| func extractTxIDFromEnvelope(txEnvelope *common.Envelope) (string, error) { | ||
| payload, err := protoutil.GetPayload(txEnvelope) | ||
| if err != nil { | ||
| return "", nil | ||
| } | ||
|
|
||
| payloadHeader := payload.Header | ||
| channelHeader, err := protoutil.UnmarshalChannelHeader(payloadHeader.ChannelHeader) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
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| return channelHeader.TxId, nil | ||
| } | ||
|
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| func extractTxnEnvelopeFromBlock(block *common.Block, txID string) (*common.Envelope, error) { | ||
| blockData := block.GetData() | ||
| for _, txEnvelopeBytes := range blockData.GetData() { | ||
| envelope, err := protoutil.GetEnvelopeFromBlock(txEnvelopeBytes) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| id, err := extractTxIDFromEnvelope(envelope) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if id != txID { | ||
| continue | ||
| } | ||
|
|
||
| txEnvelope, err := protoutil.GetEnvelopeFromBlock(txEnvelopeBytes) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return txEnvelope, nil | ||
| } | ||
|
|
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| return nil, errors.Errorf("transaction not found [%s]", txID) | ||
| } | ||
|
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| func extractEnvelopeFromBlock(block *common.Block, tranNum uint64) (*common.Envelope, error) { | ||
| blockData := block.GetData() | ||
| envelopes := blockData.GetData() | ||
| envelopesLen := uint64(len(envelopes)) | ||
| if envelopesLen-1 < tranNum { | ||
| blockNum := block.GetHeader().GetNumber() | ||
| return nil, errors.Errorf("transaction number is invalid [%d, %d, %d]", blockNum, envelopesLen, tranNum) | ||
| } | ||
| return protoutil.GetEnvelopeFromBlock(envelopes[tranNum]) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| /* | ||
| Copyright SecureKey Technologies Inc. All Rights Reserved. | ||
| SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
|
||
| package cdbblkstorage | ||
|
|
||
| import ( | ||
| "sync" | ||
|
|
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| "github.com/hyperledger/fabric/common/ledger" | ||
| ) | ||
|
|
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| // blocksItr - an iterator for iterating over a sequence of blocks | ||
| type blocksItr struct { | ||
| cdbBlockStore *cdbBlockStore | ||
| maxBlockNumAvailable uint64 | ||
| blockNumToRetrieve uint64 | ||
| closeMarker bool | ||
| closeMarkerLock *sync.Mutex | ||
| } | ||
|
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| func newBlockItr(cdbBlockStore *cdbBlockStore, startBlockNum uint64) *blocksItr { | ||
| return &blocksItr{cdbBlockStore, cdbBlockStore.cpInfo.lastBlockNumber, startBlockNum, false, &sync.Mutex{}} | ||
| } | ||
|
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| func (itr *blocksItr) waitForBlock(blockNum uint64) uint64 { | ||
| itr.cdbBlockStore.cpInfoCond.L.Lock() | ||
| defer itr.cdbBlockStore.cpInfoCond.L.Unlock() | ||
| for itr.cdbBlockStore.cpInfo.lastBlockNumber < blockNum && !itr.shouldClose() { | ||
| logger.Debugf("Going to wait for newer blocks. maxAvailaBlockNumber=[%d], waitForBlockNum=[%d]", | ||
| itr.cdbBlockStore.cpInfo.lastBlockNumber, blockNum) | ||
| itr.cdbBlockStore.cpInfoCond.Wait() | ||
| logger.Debugf("Came out of wait. maxAvailaBlockNumber=[%d]", itr.cdbBlockStore.cpInfo.lastBlockNumber) | ||
| } | ||
| return itr.cdbBlockStore.cpInfo.lastBlockNumber | ||
| } | ||
|
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| func (itr *blocksItr) shouldClose() bool { | ||
| itr.closeMarkerLock.Lock() | ||
| defer itr.closeMarkerLock.Unlock() | ||
| return itr.closeMarker | ||
| } | ||
|
|
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| // Next moves the cursor to next block and returns true iff the iterator is not exhausted | ||
| func (itr *blocksItr) Next() (ledger.QueryResult, error) { | ||
| if itr.maxBlockNumAvailable < itr.blockNumToRetrieve { | ||
| itr.maxBlockNumAvailable = itr.waitForBlock(itr.blockNumToRetrieve) | ||
| } | ||
| itr.closeMarkerLock.Lock() | ||
| defer itr.closeMarkerLock.Unlock() | ||
| if itr.closeMarker { | ||
| return nil, nil | ||
| } | ||
|
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| nextBlock, err := itr.cdbBlockStore.RetrieveBlockByNumber(itr.blockNumToRetrieve) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| itr.blockNumToRetrieve++ | ||
| return nextBlock, nil | ||
| } | ||
|
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| // Close releases any resources held by the iterator | ||
| func (itr *blocksItr) Close() { | ||
| itr.cdbBlockStore.cpInfoCond.L.Lock() | ||
| defer itr.cdbBlockStore.cpInfoCond.L.Unlock() | ||
| itr.closeMarkerLock.Lock() | ||
| defer itr.closeMarkerLock.Unlock() | ||
| itr.closeMarker = true | ||
| itr.cdbBlockStore.cpInfoCond.Broadcast() | ||
| } |
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