// loadBlockDB opens the block database and returns a handle to it.
func loadBlockDB() (database.DB, error) {
// The database name is based on the database type.
dbName := blockDbNamePrefix + "_" + cfg.DbType
dbPath := filepath.Join(cfg.DataDir, dbName)
log.Infof("Loading block database from '%s'", dbPath)
db, err := database.Open(cfg.DbType, dbPath, activeNetParams.Net)
if err != nil {
// Return the error if it's not because the database doesn't
// exist.
if dbErr, ok := err.(database.Error); !ok || dbErr.ErrorCode !=
database.ErrDbDoesNotExist {
return nil, err
}
// Create the db if it does not exist.
err = os.MkdirAll(cfg.DataDir, 0700)
if err != nil {
return nil, err
}
db, err = database.Create(cfg.DbType, dbPath, activeNetParams.Net)
if err != nil {
return nil, err
}
}
log.Info("Block database loaded")
return db, nil
}
// loadBlockDB opens the block database and returns a handle to it.
func loadBlockDB() (database.DB, error) {
// The database name is based on the database type.
dbName := blockDbNamePrefix + "_" + cfg.DbType
dbPath := filepath.Join(cfg.DataDir, dbName)
fmt.Printf("Loading block database from '%s'\n", dbPath)
db, err := database.Open(cfg.DbType, dbPath, activeNetParams.Net)
if err != nil {
return nil, err
}
return db, nil
}
// TestCreateOpenUnsupported ensures that attempting to create or open an
// unsupported database type is handled properly.
func TestCreateOpenUnsupported(t *testing.T) {
// Ensure creating a database with an unsupported type fails with the
// expected error.
testName := "create with unsupported database type"
dbType := "unsupported"
_, err := database.Create(dbType)
if !checkDbError(t, testName, err, database.ErrDbUnknownType) {
return
}
// Ensure opening a database with the an unsupported type fails with the
// expected error.
testName = "open with unsupported database type"
_, err = database.Open(dbType)
if !checkDbError(t, testName, err, database.ErrDbUnknownType) {
return
}
}
// TestCreateOpenFail ensures that errors which occur while opening or closing
// a database are handled properly.
func TestCreateOpenFail(t *testing.T) {
// bogusCreateDB is a function which acts as a bogus create and open
// driver function that intentionally returns a failure which can be
// detected.
dbType := "createopenfail"
openError := fmt.Errorf("failed to create or open database for "+
"database type [%v]", dbType)
bogusCreateDB := func(args ...interface{}) (database.DB, error) {
return nil, openError
}
// Create and add driver that intentionally fails when created or opened
// to ensure errors on database open and create are handled properly.
driver := database.Driver{
DbType: dbType,
Create: bogusCreateDB,
Open: bogusCreateDB,
}
database.RegisterDriver(driver)
// Ensure creating a database with the new type fails with the expected
// error.
_, err := database.Create(dbType)
if err != openError {
t.Errorf("expected error not received - got: %v, want %v", err,
openError)
return
}
// Ensure opening a database with the new type fails with the expected
// error.
_, err = database.Open(dbType)
if err != openError {
t.Errorf("expected error not received - got: %v, want %v", err,
openError)
return
}
}
// TestCreateOpenFail ensures that errors related to creating and opening a
// database are handled properly.
func TestCreateOpenFail(t *testing.T) {
t.Parallel()
// Ensure that attempting to open a database that doesn't exist returns
// the expected error.
wantErrCode := database.ErrDbDoesNotExist
_, err := database.Open(dbType, "noexist", blockDataNet)
if !checkDbError(t, "Open", err, wantErrCode) {
return
}
// Ensure that attempting to open a database with the wrong number of
// parameters returns the expected error.
wantErr := fmt.Errorf("invalid arguments to %s.Open -- expected "+
"database path and block network", dbType)
_, err = database.Open(dbType, 1, 2, 3)
if err.Error() != wantErr.Error() {
t.Errorf("Open: did not receive expected error - got %v, "+
"want %v", err, wantErr)
return
}
// Ensure that attempting to open a database with an invalid type for
// the first parameter returns the expected error.
wantErr = fmt.Errorf("first argument to %s.Open is invalid -- "+
"expected database path string", dbType)
_, err = database.Open(dbType, 1, blockDataNet)
if err.Error() != wantErr.Error() {
t.Errorf("Open: did not receive expected error - got %v, "+
"want %v", err, wantErr)
return
}
// Ensure that attempting to open a database with an invalid type for
// the second parameter returns the expected error.
wantErr = fmt.Errorf("second argument to %s.Open is invalid -- "+
"expected block network", dbType)
_, err = database.Open(dbType, "noexist", "invalid")
if err.Error() != wantErr.Error() {
t.Errorf("Open: did not receive expected error - got %v, "+
"want %v", err, wantErr)
return
}
// Ensure that attempting to create a database with the wrong number of
// parameters returns the expected error.
wantErr = fmt.Errorf("invalid arguments to %s.Create -- expected "+
"database path and block network", dbType)
_, err = database.Create(dbType, 1, 2, 3)
if err.Error() != wantErr.Error() {
t.Errorf("Create: did not receive expected error - got %v, "+
"want %v", err, wantErr)
return
}
// Ensure that attempting to create a database with an invalid type for
// the first parameter returns the expected error.
wantErr = fmt.Errorf("first argument to %s.Create is invalid -- "+
"expected database path string", dbType)
_, err = database.Create(dbType, 1, blockDataNet)
if err.Error() != wantErr.Error() {
t.Errorf("Create: did not receive expected error - got %v, "+
"want %v", err, wantErr)
return
}
// Ensure that attempting to create a database with an invalid type for
// the second parameter returns the expected error.
wantErr = fmt.Errorf("second argument to %s.Create is invalid -- "+
"expected block network", dbType)
_, err = database.Create(dbType, "noexist", "invalid")
if err.Error() != wantErr.Error() {
t.Errorf("Create: did not receive expected error - got %v, "+
"want %v", err, wantErr)
return
}
// Ensure operations against a closed database return the expected
// error.
dbPath := filepath.Join(os.TempDir(), "ffldb-createfail")
_ = os.RemoveAll(dbPath)
db, err := database.Create(dbType, dbPath, blockDataNet)
if err != nil {
t.Errorf("Create: unexpected error: %v", err)
return
}
defer os.RemoveAll(dbPath)
db.Close()
wantErrCode = database.ErrDbNotOpen
err = db.View(func(tx database.Tx) error {
return nil
})
if !checkDbError(t, "View", err, wantErrCode) {
return
}
wantErrCode = database.ErrDbNotOpen
err = db.Update(func(tx database.Tx) error {
return nil
})
if !checkDbError(t, "Update", err, wantErrCode) {
return
}
wantErrCode = database.ErrDbNotOpen
_, err = db.Begin(false)
if !checkDbError(t, "Begin(false)", err, wantErrCode) {
return
}
wantErrCode = database.ErrDbNotOpen
_, err = db.Begin(true)
if !checkDbError(t, "Begin(true)", err, wantErrCode) {
return
}
wantErrCode = database.ErrDbNotOpen
err = db.Close()
if !checkDbError(t, "Close", err, wantErrCode) {
return
}
}
// TestPersistence ensures that values stored are still valid after closing and
// reopening the database.
func TestPersistence(t *testing.T) {
t.Parallel()
// Create a new database to run tests against.
dbPath := filepath.Join(os.TempDir(), "ffldb-persistencetest")
_ = os.RemoveAll(dbPath)
db, err := database.Create(dbType, dbPath, blockDataNet)
if err != nil {
t.Errorf("Failed to create test database (%s) %v", dbType, err)
return
}
defer os.RemoveAll(dbPath)
defer db.Close()
// Create a bucket, put some values into it, and store a block so they
// can be tested for existence on re-open.
bucket1Key := []byte("bucket1")
storeValues := map[string]string{
"b1key1": "foo1",
"b1key2": "foo2",
"b1key3": "foo3",
}
genesisBlock := dcrutil.NewBlock(chaincfg.MainNetParams.GenesisBlock)
genesisHash := chaincfg.MainNetParams.GenesisHash
err = db.Update(func(tx database.Tx) error {
metadataBucket := tx.Metadata()
if metadataBucket == nil {
return fmt.Errorf("Metadata: unexpected nil bucket")
}
bucket1, err := metadataBucket.CreateBucket(bucket1Key)
if err != nil {
return fmt.Errorf("CreateBucket: unexpected error: %v",
err)
}
for k, v := range storeValues {
err := bucket1.Put([]byte(k), []byte(v))
if err != nil {
return fmt.Errorf("Put: unexpected error: %v",
err)
}
}
if err := tx.StoreBlock(genesisBlock); err != nil {
return fmt.Errorf("StoreBlock: unexpected error: %v",
err)
}
return nil
})
if err != nil {
t.Errorf("Update: unexpected error: %v", err)
return
}
// Close and reopen the database to ensure the values persist.
db.Close()
db, err = database.Open(dbType, dbPath, blockDataNet)
if err != nil {
t.Errorf("Failed to open test database (%s) %v", dbType, err)
return
}
defer db.Close()
// Ensure the values previously stored in the 3rd namespace still exist
// and are correct.
err = db.View(func(tx database.Tx) error {
metadataBucket := tx.Metadata()
if metadataBucket == nil {
return fmt.Errorf("Metadata: unexpected nil bucket")
}
bucket1 := metadataBucket.Bucket(bucket1Key)
if bucket1 == nil {
return fmt.Errorf("Bucket1: unexpected nil bucket")
}
for k, v := range storeValues {
gotVal := bucket1.Get([]byte(k))
if !reflect.DeepEqual(gotVal, []byte(v)) {
return fmt.Errorf("Get: key '%s' does not "+
"match expected value - got %s, want %s",
k, gotVal, v)
}
}
genesisBlockBytes, _ := genesisBlock.Bytes()
gotBytes, err := tx.FetchBlock(genesisHash)
if err != nil {
return fmt.Errorf("FetchBlock: unexpected error: %v",
err)
}
if !reflect.DeepEqual(gotBytes, genesisBlockBytes) {
return fmt.Errorf("FetchBlock: stored block mismatch")
}
return nil
})
if err != nil {
t.Errorf("View: unexpected error: %v", err)
return
}
}