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ledger_mgmt.go
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/
ledger_mgmt.go
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/*
Copyright IBM Corp. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package ledgermgmt
import (
"bytes"
"fmt"
"sync"
"github.com/hyperledger/fabric-protos-go/common"
"github.com/hyperledger/fabric/common/flogging"
"github.com/hyperledger/fabric/common/metrics"
"github.com/hyperledger/fabric/core/common/ccprovider"
"github.com/hyperledger/fabric/core/ledger"
"github.com/hyperledger/fabric/core/ledger/cceventmgmt"
"github.com/hyperledger/fabric/core/ledger/kvledger"
"github.com/pkg/errors"
)
var logger = flogging.MustGetLogger("ledgermgmt")
// ErrLedgerAlreadyOpened is thrown by a CreateLedger call if a ledger with the given id is already opened
var ErrLedgerAlreadyOpened = errors.New("ledger already opened")
// ErrLedgerMgmtNotInitialized is thrown when ledger mgmt is used before initializing this
var ErrLedgerMgmtNotInitialized = errors.New("ledger mgmt should be initialized before using")
// LedgerMgr manages ledgers for all channels
type LedgerMgr struct {
lock sync.Mutex
openedLedgers map[string]ledger.PeerLedger
ledgerProvider ledger.PeerLedgerProvider
ebMetadataProvider MetadataProvider
}
type MetadataProvider interface {
PackageMetadata(ccid string) ([]byte, error)
}
// Initializer encapsulates all the external dependencies for the ledger module
type Initializer struct {
CustomTxProcessors map[common.HeaderType]ledger.CustomTxProcessor
StateListeners []ledger.StateListener
DeployedChaincodeInfoProvider ledger.DeployedChaincodeInfoProvider
MembershipInfoProvider ledger.MembershipInfoProvider
ChaincodeLifecycleEventProvider ledger.ChaincodeLifecycleEventProvider
MetricsProvider metrics.Provider
HealthCheckRegistry ledger.HealthCheckRegistry
Config *ledger.Config
Hasher ledger.Hasher
EbMetadataProvider MetadataProvider
}
// NewLedgerMgr creates a new LedgerMgr
func NewLedgerMgr(initializer *Initializer) *LedgerMgr {
logger.Info("Initializing LedgerMgr")
finalStateListeners := addListenerForCCEventsHandler(
initializer.DeployedChaincodeInfoProvider,
initializer.StateListeners,
)
provider, err := kvledger.NewProvider(
&ledger.Initializer{
StateListeners: finalStateListeners,
DeployedChaincodeInfoProvider: initializer.DeployedChaincodeInfoProvider,
MembershipInfoProvider: initializer.MembershipInfoProvider,
ChaincodeLifecycleEventProvider: initializer.ChaincodeLifecycleEventProvider,
MetricsProvider: initializer.MetricsProvider,
HealthCheckRegistry: initializer.HealthCheckRegistry,
Config: initializer.Config,
CustomTxProcessors: initializer.CustomTxProcessors,
Hasher: initializer.Hasher,
},
)
if err != nil {
panic(fmt.Sprintf("Error in instantiating ledger provider: %s", err))
}
ledgerMgr := &LedgerMgr{
openedLedgers: make(map[string]ledger.PeerLedger),
ledgerProvider: provider,
ebMetadataProvider: initializer.EbMetadataProvider,
}
// TODO remove the following package level init
cceventmgmt.Initialize(&chaincodeInfoProviderImpl{
ledgerMgr,
initializer.DeployedChaincodeInfoProvider,
})
logger.Info("Initialized LedgerMgr")
return ledgerMgr
}
// CreateLedger creates a new ledger with the given genesis block.
// This function guarantees that the creation of ledger and committing the genesis block would an atomic action
// The chain id retrieved from the genesis block is treated as a ledger id
func (m *LedgerMgr) CreateLedger(id string, genesisBlock *common.Block) (ledger.PeerLedger, error) {
m.lock.Lock()
defer m.lock.Unlock()
logger.Infof("Creating ledger [%s] with genesis block", id)
l, err := m.ledgerProvider.Create(genesisBlock)
if err != nil {
return nil, err
}
m.openedLedgers[id] = l
logger.Infof("Created ledger [%s] with genesis block", id)
return &closableLedger{
ledgerMgr: m,
id: id,
PeerLedger: l,
}, nil
}
// OpenLedger returns a ledger for the given id
func (m *LedgerMgr) OpenLedger(id string) (ledger.PeerLedger, error) {
logger.Infof("Opening ledger with id = %s", id)
m.lock.Lock()
defer m.lock.Unlock()
_, ok := m.openedLedgers[id]
if ok {
return nil, ErrLedgerAlreadyOpened
}
l, err := m.ledgerProvider.Open(id)
if err != nil {
return nil, err
}
m.openedLedgers[id] = l
logger.Infof("Opened ledger with id = %s", id)
return &closableLedger{
ledgerMgr: m,
id: id,
PeerLedger: l,
}, nil
}
// GetLedgerIDs returns the ids of the ledgers created
func (m *LedgerMgr) GetLedgerIDs() ([]string, error) {
m.lock.Lock()
defer m.lock.Unlock()
return m.ledgerProvider.List()
}
// Close closes all the opened ledgers and any resources held for ledger management
func (m *LedgerMgr) Close() {
logger.Infof("Closing ledger mgmt")
m.lock.Lock()
defer m.lock.Unlock()
for _, l := range m.openedLedgers {
l.Close()
}
m.ledgerProvider.Close()
m.openedLedgers = nil
logger.Infof("ledger mgmt closed")
}
func (m *LedgerMgr) getOpenedLedger(ledgerID string) (ledger.PeerLedger, error) {
m.lock.Lock()
defer m.lock.Unlock()
l, ok := m.openedLedgers[ledgerID]
if !ok {
return nil, errors.Errorf("Ledger not opened [%s]", ledgerID)
}
return l, nil
}
func (m *LedgerMgr) closeLedger(ledgerID string) {
m.lock.Lock()
defer m.lock.Unlock()
l, ok := m.openedLedgers[ledgerID]
if ok {
l.Close()
delete(m.openedLedgers, ledgerID)
}
}
// closableLedger extends from actual validated ledger and overwrites the Close method
type closableLedger struct {
ledgerMgr *LedgerMgr
id string
ledger.PeerLedger
}
// Close closes the actual ledger and removes the entries from opened ledgers map
func (l *closableLedger) Close() {
l.ledgerMgr.closeLedger(l.id)
}
// lscc namespace listener for chaincode instantiate transactions (which manipulates data in 'lscc' namespace)
// this code should be later moved to peer and passed via `Initialize` function of ledgermgmt
func addListenerForCCEventsHandler(
deployedCCInfoProvider ledger.DeployedChaincodeInfoProvider,
stateListeners []ledger.StateListener) []ledger.StateListener {
return append(stateListeners, &cceventmgmt.KVLedgerLSCCStateListener{DeployedChaincodeInfoProvider: deployedCCInfoProvider})
}
// chaincodeInfoProviderImpl implements interface cceventmgmt.ChaincodeInfoProvider
type chaincodeInfoProviderImpl struct {
ledgerMgr *LedgerMgr
deployedCCInfoProvider ledger.DeployedChaincodeInfoProvider
}
// GetDeployedChaincodeInfo implements function in the interface cceventmgmt.ChaincodeInfoProvider
func (p *chaincodeInfoProviderImpl) GetDeployedChaincodeInfo(chainid string,
chaincodeDefinition *cceventmgmt.ChaincodeDefinition) (*ledger.DeployedChaincodeInfo, error) {
ledger, err := p.ledgerMgr.getOpenedLedger(chainid)
if err != nil {
return nil, err
}
qe, err := ledger.NewQueryExecutor()
if err != nil {
return nil, err
}
defer qe.Done()
deployedChaincodeInfo, err := p.deployedCCInfoProvider.ChaincodeInfo(chainid, chaincodeDefinition.Name, qe)
if err != nil || deployedChaincodeInfo == nil {
return nil, err
}
if deployedChaincodeInfo.Version != chaincodeDefinition.Version ||
!bytes.Equal(deployedChaincodeInfo.Hash, chaincodeDefinition.Hash) {
// if the deployed chaincode with the given name has different version or different hash, return nil
return nil, nil
}
return deployedChaincodeInfo, nil
}
// RetrieveChaincodeArtifacts implements function in the interface cceventmgmt.ChaincodeInfoProvider
func (p *chaincodeInfoProviderImpl) RetrieveChaincodeArtifacts(chaincodeDefinition *cceventmgmt.ChaincodeDefinition) (installed bool, dbArtifactsTar []byte, err error) {
ccid := chaincodeDefinition.Name + ":" + chaincodeDefinition.Version
md, err := p.ledgerMgr.ebMetadataProvider.PackageMetadata(ccid)
if err != nil {
return false, nil, err
}
if md != nil {
return true, md, nil
}
return ccprovider.ExtractStatedbArtifactsForChaincode(ccid)
}