Refactor db package

Currently db will open when GetDBHandle method is invoked first time,
so GetDBHandle method needs to use mutex.
This patch makes db open and close in its lifecycle methods Start and
Stop, invokes Start only when peer starts and invokes Stop when peer
stops.
After that, methods in db do not need to support concurrency.

Change-Id: Id8612f2a846c5d626bd42c5cd4ae482076f6a975
Signed-off-by: grapebaba <281165273@qq.com>

core/chaincode/exectransaction_test.go

@@ -32,6 +32,7 @@ import (
 	"github.com/hyperledger/fabric/core/container"
 	"github.com/hyperledger/fabric/core/container/ccintf"
 	"github.com/hyperledger/fabric/core/crypto"
+	"github.com/hyperledger/fabric/core/db"
 	"github.com/hyperledger/fabric/core/ledger"
 	"github.com/hyperledger/fabric/core/util"
 	"github.com/hyperledger/fabric/membersrvc/ca"
@@ -46,6 +47,8 @@ import (
 // attributes to request in the batch of tcerts while deploying, invoking or querying
 var attributes = []string{"company", "position"}
 
+var testDBWrapper = db.NewTestDBWrapper()
+
 func getNowMillis() int64 {
 	nanos := time.Now().UnixNano()
 	return nanos / 1000000
@@ -355,6 +358,7 @@ func executeDeployTransaction(t *testing.T, url string) {
 
 // Test deploy of a transaction
 func TestExecuteDeployTransaction(t *testing.T) {
+	testDBWrapper.CleanDB(t)
 	executeDeployTransaction(t, "github.com/hyperledger/fabric/examples/chaincode/go/chaincode_example01")
 }
 
@@ -364,6 +368,7 @@ func TestGopathExecuteDeployTransaction(t *testing.T) {
 	// and a couple of elements - it doesn't matter what they are
 	os.Setenv("GOPATH", os.Getenv("GOPATH")+string(os.PathSeparator)+string(os.PathListSeparator)+"/tmp/foo"+string(os.PathListSeparator)+"/tmp/bar")
 	fmt.Printf("set GOPATH to: \"%s\"\n", os.Getenv("GOPATH"))
+	testDBWrapper.CleanDB(t)
 	executeDeployTransaction(t, "github.com/hyperledger/fabric/examples/chaincode/go/chaincode_example01")
 }
 
@@ -372,6 +377,7 @@ func TestHTTPExecuteDeployTransaction(t *testing.T) {
 	// The chaincode used here cannot be from the fabric repo
 	// itself or it won't be downloaded because it will be found
 	// in GOPATH, which would defeat the test
+	testDBWrapper.CleanDB(t)
 	executeDeployTransaction(t, "http://github.com/hyperledger/fabric-test-resources/examples/chaincode/go/chaincode_example01")
 }
 
@@ -465,6 +471,7 @@ func invokeExample02Transaction(ctxt context.Context, cID *pb.ChaincodeID, args
 }
 
 func TestExecuteInvokeTransaction(t *testing.T) {
+	testDBWrapper.CleanDB(t)
 	var opts []grpc.ServerOption
 
 	//TLS is on by default. This is the ONLY test that does NOT use TLS
@@ -570,6 +577,7 @@ func exec(ctxt context.Context, chaincodeID string, numTrans int, numQueries int
 
 // Test the execution of a query.
 func TestExecuteQuery(t *testing.T) {
+	testDBWrapper.CleanDB(t)
 	var opts []grpc.ServerOption
 	if viper.GetBool("peer.tls.enabled") {
 		creds, err := credentials.NewServerTLSFromFile(viper.GetString("peer.tls.cert.file"), viper.GetString("peer.tls.key.file"))
@@ -653,6 +661,7 @@ func TestExecuteQuery(t *testing.T) {
 
 // Test the execution of an invalid transaction.
 func TestExecuteInvokeInvalidTransaction(t *testing.T) {
+	testDBWrapper.CleanDB(t)
 	var opts []grpc.ServerOption
 	if viper.GetBool("peer.tls.enabled") {
 		creds, err := credentials.NewServerTLSFromFile(viper.GetString("peer.tls.cert.file"), viper.GetString("peer.tls.key.file"))
@@ -714,6 +723,7 @@ func TestExecuteInvokeInvalidTransaction(t *testing.T) {
 
 // Test the execution of an invalid query.
 func TestExecuteInvalidQuery(t *testing.T) {
+	testDBWrapper.CleanDB(t)
 	var opts []grpc.ServerOption
 	if viper.GetBool("peer.tls.enabled") {
 		creds, err := credentials.NewServerTLSFromFile(viper.GetString("peer.tls.cert.file"), viper.GetString("peer.tls.key.file"))
@@ -785,6 +795,7 @@ func TestExecuteInvalidQuery(t *testing.T) {
 
 // Test the execution of a chaincode that invokes another chaincode.
 func TestChaincodeInvokeChaincode(t *testing.T) {
+	testDBWrapper.CleanDB(t)
 	var opts []grpc.ServerOption
 	if viper.GetBool("peer.tls.enabled") {
 		creds, err := credentials.NewServerTLSFromFile(viper.GetString("peer.tls.cert.file"), viper.GetString("peer.tls.key.file"))
@@ -898,6 +909,7 @@ func TestChaincodeInvokeChaincode(t *testing.T) {
 // Test the execution of a chaincode that invokes another chaincode with wrong parameters. Should receive error from
 // from the called chaincode
 func TestChaincodeInvokeChaincodeErrorCase(t *testing.T) {
+	testDBWrapper.CleanDB(t)
 	var opts []grpc.ServerOption
 	if viper.GetBool("peer.tls.enabled") {
 		creds, err := credentials.NewServerTLSFromFile(viper.GetString("peer.tls.cert.file"), viper.GetString("peer.tls.key.file"))
@@ -1098,6 +1110,7 @@ func chaincodeQueryChaincode(user string) error {
 
 // Test the execution of a chaincode query that queries another chaincode without security enabled
 func TestChaincodeQueryChaincode(t *testing.T) {
+	testDBWrapper.CleanDB(t)
 	var peerLis net.Listener
 	var err error
 	if peerLis, err = initPeer(); err != nil {
@@ -1119,6 +1132,7 @@ func TestChaincodeQueryChaincode(t *testing.T) {
 // Test the execution of a chaincode that queries another chaincode with invalid parameter. Should receive error from
 // from the called chaincode
 func TestChaincodeQueryChaincodeErrorCase(t *testing.T) {
+	testDBWrapper.CleanDB(t)
 	var opts []grpc.ServerOption
 	if viper.GetBool("peer.tls.enabled") {
 		creds, err := credentials.NewServerTLSFromFile(viper.GetString("peer.tls.cert.file"), viper.GetString("peer.tls.key.file"))
@@ -1229,6 +1243,7 @@ func TestChaincodeQueryChaincodeErrorCase(t *testing.T) {
 // Test the execution of a chaincode query that queries another chaincode with security enabled
 // NOTE: this really needs to be a behave test. Remove when we have support in behave for multiple chaincodes
 func TestChaincodeQueryChaincodeWithSec(t *testing.T) {
+	testDBWrapper.CleanDB(t)
 	viper.Set("security.enabled", "true")
 
 	//Initialize crypto
@@ -1282,6 +1297,7 @@ func TestChaincodeQueryChaincodeWithSec(t *testing.T) {
 
 // Test the invocation of a transaction.
 func TestRangeQuery(t *testing.T) {
+	testDBWrapper.CleanDB(t)
 	var opts []grpc.ServerOption
 	if viper.GetBool("peer.tls.enabled") {
 		creds, err := credentials.NewServerTLSFromFile(viper.GetString("peer.tls.cert.file"), viper.GetString("peer.tls.key.file"))
@@ -1352,6 +1368,7 @@ func TestRangeQuery(t *testing.T) {
 }
 
 func TestGetEvent(t *testing.T) {
+	testDBWrapper.CleanDB(t)
 	var opts []grpc.ServerOption
 	if viper.GetBool("peer.tls.enabled") {
 		creds, err := credentials.NewServerTLSFromFile(viper.GetString("peer.tls.cert.file"), viper.GetString("peer.tls.key.file"))

core/db/db.go

@@ -22,7 +22,6 @@ import (
 	"os"
 	"path"
 	"strings"
-	"sync"
 
 	"github.com/op/go-logging"
 	"github.com/spf13/viper"
@@ -45,13 +44,6 @@ var columnfamilies = []string{
 	persistCF,    // persistent per-peer state (consensus)
 }
 
-type dbState int32
-
-const (
-	closed dbState = iota
-	opened
-)
-
 // OpenchainDB encapsulates rocksdb's structures
 type OpenchainDB struct {
 	DB           *gorocksdb.DB
@@ -60,23 +52,30 @@ type OpenchainDB struct {
 	StateDeltaCF *gorocksdb.ColumnFamilyHandle
 	IndexesCF    *gorocksdb.ColumnFamilyHandle
 	PersistCF    *gorocksdb.ColumnFamilyHandle
-	dbState      dbState
-	mux          sync.Mutex
 }
 
-var openchainDB = Create()
+var openchainDB = create()
 
 // Create create an openchainDB instance
-func Create() *OpenchainDB {
-	return &OpenchainDB{dbState: closed}
+func create() *OpenchainDB {
+	return &OpenchainDB{}
 }
 
-// GetDBHandle get an opened openchainDB singleton
+// GetDBHandle gets an opened openchainDB singleton. Note that method Start must always be invoked before this method.
 func GetDBHandle() *OpenchainDB {
-	openchainDB.Open()
 	return openchainDB
 }
 
+// Start the db, init the openchainDB instance and open the db. Note this method has no guarantee correct behavior concurrent invocation.
+func Start() {
+	openchainDB.open()
+}
+
+// Stop the db. Note this method has no guarantee correct behavior concurrent invocation.
+func Stop() {
+	openchainDB.close()
+}
+
 // GetFromBlockchainCF get value for given key from column family - blockchainCF
 func (openchainDB *OpenchainDB) GetFromBlockchainCF(key []byte) ([]byte, error) {
 	return openchainDB.Get(openchainDB.BlockchainCF, key)
@@ -142,15 +141,7 @@ func getDBPath() string {
 }
 
 // Open open underlying rocksdb
-func (openchainDB *OpenchainDB) Open() {
-	openchainDB.mux.Lock()
-	if openchainDB.dbState == opened {
-		openchainDB.mux.Unlock()
-		return
-	}
-
-	defer openchainDB.mux.Unlock()
-
+func (openchainDB *OpenchainDB) open() {
 	dbPath := getDBPath()
 	missing, err := dirMissingOrEmpty(dbPath)
 	if err != nil {
@@ -190,25 +181,16 @@ func (openchainDB *OpenchainDB) Open() {
 	openchainDB.StateDeltaCF = cfHandlers[3]
 	openchainDB.IndexesCF = cfHandlers[4]
 	openchainDB.PersistCF = cfHandlers[5]
-	openchainDB.dbState = opened
 }
 
 // Close releases all column family handles and closes rocksdb
-func (openchainDB *OpenchainDB) Close() {
-	openchainDB.mux.Lock()
-	if openchainDB.dbState == closed {
-		openchainDB.mux.Unlock()
-		return
-	}
-
-	defer openchainDB.mux.Unlock()
+func (openchainDB *OpenchainDB) close() {
 	openchainDB.BlockchainCF.Destroy()
 	openchainDB.StateCF.Destroy()
 	openchainDB.StateDeltaCF.Destroy()
 	openchainDB.IndexesCF.Destroy()
 	openchainDB.PersistCF.Destroy()
 	openchainDB.DB.Close()
-	openchainDB.dbState = closed
 }
 
 // DeleteState delets ALL state keys/values from the DB. This is generally

core/db/db_test.go

@@ -41,72 +41,64 @@ func TestGetDBPathEmptyPath(t *testing.T) {
 		}
 	}()
 	defer viper.Set("peer.fileSystemPath", originalSetting)
+	Start()
 	GetDBHandle()
 }
 
-func TestCreateDB(t *testing.T) {
-	openchainDB := Create()
-	openchainDB.Open()
-	defer deleteTestDBPath()
-	defer openchainDB.Close()
-}
-
-func TestOpenDB_DirDoesNotExist(t *testing.T) {
-	openchainDB := Create()
+func TestStartDB_DirDoesNotExist(t *testing.T) {
 	deleteTestDBPath()
 
 	defer deleteTestDBPath()
-	defer openchainDB.Close()
+	defer Stop()
 	defer func() {
 		if r := recover(); r != nil {
 			t.Fatalf("Failed to open DB: %s", r)
 		}
 	}()
-	openchainDB.Open()
+	Start()
 }
 
-func TestOpenDB_NonEmptyDirExists(t *testing.T) {
-	openchainDB := Create()
+func TestStartDB_NonEmptyDirExists(t *testing.T) {
 	deleteTestDBPath()
 	createNonEmptyTestDBPath()
 
-	defer deleteTestDBPath()
-	defer openchainDB.Close()
 	defer func() {
 		if r := recover(); r == nil {
 			t.Fatalf("dbPath is already exists. DB open should throw error")
 		}
 	}()
-	openchainDB.Open()
+	Start()
 }
 
 func TestWriteAndRead(t *testing.T) {
-	openchainDB := GetDBHandle()
+	deleteTestDBPath()
+	Start()
 	defer deleteTestDBPath()
-	defer openchainDB.Close()
+	defer Stop()
 	performBasicReadWrite(openchainDB, t)
 }
 
 // This test verifies that when a new column family is added to the DB
 // users at an older level of the DB will still be able to open it with new code
 func TestDBColumnUpgrade(t *testing.T) {
-	openchainDB := GetDBHandle()
-	openchainDB.Close()
+	deleteTestDBPath()
+	Start()
+	Stop()
 
 	oldcfs := columnfamilies
 	columnfamilies = append([]string{"Testing"}, columnfamilies...)
 	defer func() {
 		columnfamilies = oldcfs
 	}()
-	openchainDB = GetDBHandle()
 
 	defer deleteTestDBPath()
-	defer openchainDB.Close()
+	defer Stop()
 	defer func() {
 		if r := recover(); r != nil {
 			t.Fatalf("Error re-opening DB with upgraded columnFamilies")
 		}
 	}()
+	Start()
 }
 
 func TestDeleteState(t *testing.T) {

core/db/db_test_exports.go

@@ -46,6 +46,7 @@ func (testDB *TestDBWrapper) CleanDB(t testing.TB) {
 	testDB.removeDBPath()
 	t.Logf("Creating testDB")
 
+	Start()
 	testDB.performCleanup = true
 }
 
@@ -55,12 +56,13 @@ func (testDB *TestDBWrapper) CreateFreshDBGinkgo() {
 	// at the end of the test
 	testDB.cleanup()
 	testDB.removeDBPath()
+	Start()
 	testDB.performCleanup = true
 }
 
 func (testDB *TestDBWrapper) cleanup() {
 	if testDB.performCleanup {
-		GetDBHandle().Close()
+		Stop()
 		testDB.performCleanup = false
 	}
 }
@@ -116,8 +118,12 @@ func (testDB *TestDBWrapper) GetFromStateDeltaCF(t testing.TB, key []byte) []byt
 
 // CloseDB closes the db
 func (testDB *TestDBWrapper) CloseDB(t testing.TB) {
-	openchainDB := GetDBHandle()
-	openchainDB.Close()
+	Stop()
+}
+
+// OpenDB opens the db
+func (testDB *TestDBWrapper) OpenDB(t testing.TB) {
+	Start()
 }
 
 // GetEstimatedNumKeys returns estimated number of key-values in db. This is not accurate in all the cases

core/ledger/blockchain_indexes_async_test.go

@@ -187,8 +187,11 @@ func TestIndexesAsync_IndexPendingBlocks(t *testing.T) {
 		t.Fatalf("Error populating block chain with sample data: %s", err)
 	}
 
-	// close the db and create new instance of blockchain (and the associated async indexer) - the indexer should index the pending blocks
+	// close the db
 	testDBWrapper.CloseDB(t)
+	// open the db again and create new instance of blockchain (and the associated async indexer)
+	// the indexer should index the pending blocks
+	testDBWrapper.OpenDB(t)
 	testBlockchainWrapper = newTestBlockchainWrapper(t)
 	defer chain.indexer.stop()
 

core/system_chaincode/systemchaincode_test.go

@@ -24,6 +24,7 @@ import (
 	"time"
 
 	"github.com/hyperledger/fabric/core/chaincode"
+	"github.com/hyperledger/fabric/core/db"
 	"github.com/hyperledger/fabric/core/ledger"
 	"github.com/hyperledger/fabric/core/system_chaincode/api"
 	"github.com/hyperledger/fabric/core/system_chaincode/samplesyscc"
@@ -34,6 +35,8 @@ import (
 	"google.golang.org/grpc"
 )
 
+var testDBWrapper = db.NewTestDBWrapper()
+
 // Invoke or query a chaincode.
 func invoke(ctx context.Context, spec *pb.ChaincodeSpec, typ pb.Transaction_Type) (*pb.ChaincodeEvent, string, []byte, error) {
 	chaincodeInvocationSpec := &pb.ChaincodeInvocationSpec{ChaincodeSpec: spec}
@@ -75,6 +78,7 @@ func closeListenerAndSleep(l net.Listener) {
 
 // Test deploy of a transaction.
 func TestExecuteDeploySysChaincode(t *testing.T) {
+	testDBWrapper.CleanDB(t)
 	var opts []grpc.ServerOption
 	grpcServer := grpc.NewServer(opts...)
 	viper.Set("peer.fileSystemPath", "/var/hyperledger/test/tmpdb")