fix(stmtlogger): lets gemini work with empty 'test-statement-log-file' option

pkg/stmtlogger/filelogger.go

@@ -31,7 +31,13 @@ const (
 	errorsOnFileLimit = 5
 )
 
-type FileLogger struct {
+type StmtToFile interface {
+	LogStmt(*typedef.Stmt)
+	LogStmtWithTimeStamp(stmt *typedef.Stmt, ts time.Time)
+	Close() error
+}
+
+type fileLogger struct {
 	fd                   *os.File
 	activeChannel        atomic.Pointer[loggerChan]
 	channel              loggerChan
@@ -46,7 +52,7 @@ type logRec struct {
 	ts   time.Time
 }
 
-func (fl *FileLogger) LogStmt(stmt *typedef.Stmt) {
+func (fl *fileLogger) LogStmt(stmt *typedef.Stmt) {
 	ch := fl.activeChannel.Load()
 	if ch != nil {
 		*ch <- logRec{
@@ -55,7 +61,7 @@ func (fl *FileLogger) LogStmt(stmt *typedef.Stmt) {
 	}
 }
 
-func (fl *FileLogger) LogStmtWithTimeStamp(stmt *typedef.Stmt, ts time.Time) {
+func (fl *fileLogger) LogStmtWithTimeStamp(stmt *typedef.Stmt, ts time.Time) {
 	ch := fl.activeChannel.Load()
 	if ch != nil {
 		*ch <- logRec{
@@ -65,11 +71,11 @@ func (fl *FileLogger) LogStmtWithTimeStamp(stmt *typedef.Stmt, ts time.Time) {
 	}
 }
 
-func (fl *FileLogger) Close() error {
+func (fl *fileLogger) Close() error {
 	return fl.fd.Close()
 }
 
-func (fl *FileLogger) committer() {
+func (fl *fileLogger) committer() {
 	var err2 error
 
 	defer func() {
@@ -114,16 +120,16 @@ func (fl *FileLogger) committer() {
 	}
 }
 
-func NewFileLogger(filename string) (*FileLogger, error) {
+func NewFileLogger(filename string) (StmtToFile, error) {
 	if filename == "" {
-		return nil, nil
+		return &nopFileLogger{}, nil
 	}
 	fd, err := os.OpenFile(filename, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0644)
 	if err != nil {
 		return nil, err
 	}
 
-	out := &FileLogger{
+	out := &fileLogger{
 		filename: filename,
 		fd:       fd,
 		channel:  make(loggerChan, defaultChanSize),
@@ -133,3 +139,11 @@ func NewFileLogger(filename string) (*FileLogger, error) {
 	go out.committer()
 	return out, nil
 }
+
+type nopFileLogger struct{}
+
+func (n *nopFileLogger) LogStmtWithTimeStamp(_ *typedef.Stmt, _ time.Time) {}
+
+func (n *nopFileLogger) Close() error { return nil }
+
+func (n *nopFileLogger) LogStmt(_ *typedef.Stmt) {}

pkg/store/cqlstore.go

@@ -27,6 +27,7 @@ import (
 	"github.com/scylladb/gocqlx/v2/qb"
 	"go.uber.org/zap"
 
+	"github.com/scylladb/gemini/pkg/stmtlogger"
 	"github.com/scylladb/gemini/pkg/typedef"
 )
 
@@ -39,7 +40,7 @@ type cqlStore struct { //nolint:govet
 	maxRetriesMutate        int
 	maxRetriesMutateSleep   time.Duration
 	useServerSideTimestamps bool
-	stmtLogger              stmtLogger
+	stmtLogger              stmtlogger.StmtToFile
 }
 
 func (cs *cqlStore) name() string {

pkg/store/store.go

@@ -56,12 +56,6 @@ type storeLoader interface {
 	name() string
 }
 
-type stmtLogger interface {
-	LogStmt(*typedef.Stmt)
-	LogStmtWithTimeStamp(stmt *typedef.Stmt, ts time.Time)
-	Close() error
-}
-
 type Store interface {
 	Create(context.Context, *typedef.Stmt, *typedef.Stmt) error
 	Mutate(context.Context, *typedef.Stmt) error
@@ -132,7 +126,7 @@ func (n *noOpStore) close() error {
 type delegatingStore struct {
 	oracleStore     storeLoader
 	testStore       storeLoader
-	statementLogger stmtLogger
+	statementLogger stmtlogger.StmtToFile
 	logger          *zap.Logger
 	validations     bool
 }