137 lines
3.8 KiB
Go
137 lines
3.8 KiB
Go
/*
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Copyright IBM Corp. All Rights Reserved.
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SPDX-License-Identifier: Apache-2.0
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*/
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package chaincode
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import (
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"sync"
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pb "github.com/hyperledger/fabric-protos-go/peer"
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commonledger "github.com/hyperledger/fabric/common/ledger"
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"github.com/hyperledger/fabric/core/common/privdata"
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"github.com/hyperledger/fabric/core/ledger"
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)
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type TransactionContext struct {
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ChannelID string
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NamespaceID string
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SignedProp *pb.SignedProposal
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Proposal *pb.Proposal
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ResponseNotifier chan *pb.ChaincodeMessage
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TXSimulator ledger.TxSimulator
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HistoryQueryExecutor ledger.HistoryQueryExecutor
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CollectionStore privdata.CollectionStore
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IsInitTransaction bool
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// tracks open iterators used for range queries
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queryMutex sync.Mutex
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queryIteratorMap map[string]commonledger.ResultsIterator
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pendingQueryResults map[string]*PendingQueryResult
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totalReturnCount map[string]*int32
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// cache used to save the result of collection acl
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// as a transactionContext is created for every chaincode
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// invoke (even in case of chaincode-calling-chaincode,
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// we do not need to store the namespace in the map and
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// collection alone is sufficient.
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CollectionACLCache CollectionACLCache
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}
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// CollectionACLCache encapsulates a cache that stores read
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// write permission on a collection
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type CollectionACLCache map[string]*readWritePermission
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type readWritePermission struct {
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read, write bool
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}
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func (c CollectionACLCache) put(collection string, rwPermission *readWritePermission) {
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c[collection] = rwPermission
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}
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func (c CollectionACLCache) get(collection string) *readWritePermission {
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return c[collection]
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}
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func (t *TransactionContext) InitializeCollectionACLCache() {
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t.CollectionACLCache = make(CollectionACLCache)
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}
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func (t *TransactionContext) InitializeQueryContext(queryID string, iter commonledger.ResultsIterator) {
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t.queryMutex.Lock()
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if t.queryIteratorMap == nil {
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t.queryIteratorMap = map[string]commonledger.ResultsIterator{}
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}
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if t.pendingQueryResults == nil {
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t.pendingQueryResults = map[string]*PendingQueryResult{}
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}
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if t.totalReturnCount == nil {
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t.totalReturnCount = map[string]*int32{}
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}
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t.queryIteratorMap[queryID] = iter
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t.pendingQueryResults[queryID] = &PendingQueryResult{}
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zeroValue := int32(0)
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t.totalReturnCount[queryID] = &zeroValue
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t.queryMutex.Unlock()
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}
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func (t *TransactionContext) GetQueryIterator(queryID string) commonledger.ResultsIterator {
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t.queryMutex.Lock()
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iter := t.queryIteratorMap[queryID]
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t.queryMutex.Unlock()
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return iter
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}
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func (t *TransactionContext) GetPendingQueryResult(queryID string) *PendingQueryResult {
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t.queryMutex.Lock()
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result := t.pendingQueryResults[queryID]
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t.queryMutex.Unlock()
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return result
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}
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func (t *TransactionContext) GetTotalReturnCount(queryID string) *int32 {
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t.queryMutex.Lock()
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result := t.totalReturnCount[queryID]
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t.queryMutex.Unlock()
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return result
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}
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func (t *TransactionContext) CleanupQueryContext(queryID string) {
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t.queryMutex.Lock()
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defer t.queryMutex.Unlock()
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iter := t.queryIteratorMap[queryID]
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if iter != nil {
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iter.Close()
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}
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delete(t.queryIteratorMap, queryID)
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delete(t.pendingQueryResults, queryID)
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delete(t.totalReturnCount, queryID)
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}
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func (t *TransactionContext) CleanupQueryContextWithBookmark(queryID string) string {
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t.queryMutex.Lock()
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defer t.queryMutex.Unlock()
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iter := t.queryIteratorMap[queryID]
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bookmark := ""
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if iter != nil {
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if queryResultIterator, ok := iter.(commonledger.QueryResultsIterator); ok {
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bookmark = queryResultIterator.GetBookmarkAndClose()
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}
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}
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delete(t.queryIteratorMap, queryID)
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delete(t.pendingQueryResults, queryID)
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delete(t.totalReturnCount, queryID)
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return bookmark
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}
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func (t *TransactionContext) CloseQueryIterators() {
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t.queryMutex.Lock()
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defer t.queryMutex.Unlock()
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for _, iter := range t.queryIteratorMap {
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iter.Close()
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}
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}
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