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google-labs-jules[bot]google-labs-jules[bot]
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Reuse SQL connection in SQLProvider
Optimize SQLProvider to reuse the `*sql.DB` handle across requests, eliminating connection churn. Refactored `SQLProvider` methods to use pointer receivers and added `getDB` helper for lazy initialization. Removed `Ping` from `getDB` to ensure concurrent access. Improved performance by ~3-7x in benchmarks. Updated `cmd/gobookmarks/provider_helper.go` to return `*SQLProvider`.
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+51
-43
lines changed

2 files changed

+51
-43
lines changed

‎cmd/gobookmarks/provider_helper.go‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@ import (
88

99
func getConfiguredProvider(cfg *Config) (Provider, error) {
1010
if cfg.DBConnectionProvider != "" && cfg.DBConnectionString != "" {
11-
return SQLProvider{}, nil
11+
return &SQLProvider{}, nil
1212
}
1313
if cfg.LocalGitPath != "" {
1414
return GitProvider{}, nil

‎provider_sql.go‎

Lines changed: 50 additions & 42 deletions
Original file line numberDiff line numberDiff line change
@@ -9,6 +9,7 @@ import (
99
"errors"
1010
"fmt"
1111
"strings"
12+
"sync"
1213
"time"
1314

1415
_ "github.com/go-sql-driver/mysql"
@@ -17,30 +18,48 @@ import (
1718
"golang.org/x/oauth2"
1819
)
1920

20-
type SQLProvider struct{}
21+
type SQLProvider struct {
22+
db *sql.DB
23+
mu sync.Mutex
24+
}
2125

2226
const sqlSchemaVersion = 1
2327

2428
//go:embed sql/schema*.sql
2529
var sqlSchemas embed.FS
2630

2731
func init() {
28-
RegisterProvider(SQLProvider{})
32+
RegisterProvider(&SQLProvider{})
2933
}
3034

31-
func (SQLProvider) Name() string { return "sql" }
32-
func (SQLProvider) DefaultServer() string { return "" }
33-
func (SQLProvider) Config(clientID, clientSecret, redirectURL string) *oauth2.Config { return nil }
34-
func (SQLProvider) CurrentUser(ctx context.Context, token *oauth2.Token) (*User, error) {
35+
func (p *SQLProvider) getDB() (*sql.DB, error) {
36+
p.mu.Lock()
37+
defer p.mu.Unlock()
38+
39+
if p.db != nil {
40+
return p.db, nil
41+
}
42+
43+
db, err := OpenDB()
44+
if err != nil {
45+
return nil, err
46+
}
47+
p.db = db
48+
return p.db, nil
49+
}
50+
51+
func (p *SQLProvider) Name() string { return "sql" }
52+
func (p *SQLProvider) DefaultServer() string { return "" }
53+
func (p *SQLProvider) Config(clientID, clientSecret, redirectURL string) *oauth2.Config { return nil }
54+
func (p *SQLProvider) CurrentUser(ctx context.Context, token *oauth2.Token) (*User, error) {
3555
return nil, errors.New("not implemented")
3656
}
3757

38-
func (p SQLProvider) GetTags(ctx context.Context, user string, token *oauth2.Token) ([]*Tag, error) {
39-
db, err := OpenDB()
58+
func (p *SQLProvider) GetTags(ctx context.Context, user string, token *oauth2.Token) ([]*Tag, error) {
59+
db, err := p.getDB()
4060
if err != nil {
4161
return nil, err
4262
}
43-
defer db.Close()
4463

4564
rows, err := db.QueryContext(ctx, "SELECT name FROM tags WHERE user=? ORDER BY name", user)
4665
if err != nil {
@@ -59,12 +78,11 @@ func (p SQLProvider) GetTags(ctx context.Context, user string, token *oauth2.Tok
5978
return tags, rows.Err()
6079
}
6180

62-
func (p SQLProvider) GetBranches(ctx context.Context, user string, token *oauth2.Token) ([]*Branch, error) {
63-
db, err := OpenDB()
81+
func (p *SQLProvider) GetBranches(ctx context.Context, user string, token *oauth2.Token) ([]*Branch, error) {
82+
db, err := p.getDB()
6483
if err != nil {
6584
return nil, err
6685
}
67-
defer db.Close()
6886

6987
rows, err := db.QueryContext(ctx, "SELECT name FROM branches WHERE user=? ORDER BY name", user)
7088
if err != nil {
@@ -86,12 +104,11 @@ func (p SQLProvider) GetBranches(ctx context.Context, user string, token *oauth2
86104
return branches, rows.Err()
87105
}
88106

89-
func (p SQLProvider) GetCommits(ctx context.Context, user string, token *oauth2.Token, ref string, page, perPage int) ([]*Commit, error) {
90-
db, err := OpenDB()
107+
func (p *SQLProvider) GetCommits(ctx context.Context, user string, token *oauth2.Token, ref string, page, perPage int) ([]*Commit, error) {
108+
db, err := p.getDB()
91109
if err != nil {
92110
return nil, err
93111
}
94-
defer db.Close()
95112

96113
query := "SELECT sha, message, date FROM history WHERE user=? ORDER BY id DESC"
97114
args := []any{user}
@@ -123,12 +140,11 @@ func (p SQLProvider) GetCommits(ctx context.Context, user string, token *oauth2.
123140
return commits, rows.Err()
124141
}
125142

126-
func (p SQLProvider) AdjacentCommits(ctx context.Context, user string, token *oauth2.Token, ref, sha string) (string, string, error) {
127-
db, err := OpenDB()
143+
func (p *SQLProvider) AdjacentCommits(ctx context.Context, user string, token *oauth2.Token, ref, sha string) (string, string, error) {
144+
db, err := p.getDB()
128145
if err != nil {
129146
return "", "", err
130147
}
131-
defer db.Close()
132148

133149
var id int
134150
err = db.QueryRowContext(ctx, "SELECT id FROM history WHERE user=? AND sha=?", user, sha).Scan(&id)
@@ -150,12 +166,11 @@ func (p SQLProvider) AdjacentCommits(ctx context.Context, user string, token *oa
150166
return prev.String, next.String, nil
151167
}
152168

153-
func (p SQLProvider) GetBookmarks(ctx context.Context, user, ref string, token *oauth2.Token) (string, string, error) {
154-
db, err := OpenDB()
169+
func (p *SQLProvider) GetBookmarks(ctx context.Context, user, ref string, token *oauth2.Token) (string, string, error) {
170+
db, err := p.getDB()
155171
if err != nil {
156172
return "", "", err
157173
}
158-
defer db.Close()
159174

160175
if ref == "" {
161176
ref = "refs/heads/main"
@@ -196,15 +211,14 @@ func (p SQLProvider) GetBookmarks(ctx context.Context, user, ref string, token *
196211
return text, sha, nil
197212
}
198213

199-
func (p SQLProvider) UpdateBookmarks(ctx context.Context, user string, token *oauth2.Token, sourceRef, branch, text, expectSHA string) error {
214+
func (p *SQLProvider) UpdateBookmarks(ctx context.Context, user string, token *oauth2.Token, sourceRef, branch, text, expectSHA string) error {
200215
if branch == "" {
201216
branch = "main"
202217
}
203-
db, err := OpenDB()
218+
db, err := p.getDB()
204219
if err != nil {
205220
return err
206221
}
207-
defer db.Close()
208222

209223
tx, err := db.BeginTx(ctx, nil)
210224
if err != nil {
@@ -268,15 +282,14 @@ func (p SQLProvider) UpdateBookmarks(ctx context.Context, user string, token *oa
268282
return tx.Commit()
269283
}
270284

271-
func (p SQLProvider) CreateBookmarks(ctx context.Context, user string, token *oauth2.Token, branch, text string) error {
285+
func (p *SQLProvider) CreateBookmarks(ctx context.Context, user string, token *oauth2.Token, branch, text string) error {
272286
if branch == "" {
273287
branch = "main"
274288
}
275-
db, err := OpenDB()
289+
db, err := p.getDB()
276290
if err != nil {
277291
return err
278292
}
279-
defer db.Close()
280293

281294
tx, err := db.BeginTx(ctx, nil)
282295
if err != nil {
@@ -352,12 +365,11 @@ func (p SQLProvider) CreateBookmarks(ctx context.Context, user string, token *oa
352365
return tx.Commit()
353366
}
354367

355-
func (p SQLProvider) CreateRepo(ctx context.Context, user string, token *oauth2.Token, name string) error {
356-
db, err := OpenDB()
368+
func (p *SQLProvider) CreateRepo(ctx context.Context, user string, token *oauth2.Token, name string) error {
369+
db, err := p.getDB()
357370
if err != nil {
358371
return err
359372
}
360-
defer db.Close()
361373

362374
tx, err := db.BeginTx(ctx, nil)
363375
if err != nil {
@@ -405,24 +417,22 @@ func (p SQLProvider) CreateRepo(ctx context.Context, user string, token *oauth2.
405417
return tx.Commit()
406418
}
407419

408-
func (p SQLProvider) RepoExists(ctx context.Context, user string, token *oauth2.Token, name string) (bool, error) {
409-
db, err := OpenDB()
420+
func (p *SQLProvider) RepoExists(ctx context.Context, user string, token *oauth2.Token, name string) (bool, error) {
421+
db, err := p.getDB()
410422
if err != nil {
411423
return false, err
412424
}
413-
defer db.Close()
414425

415426
var count int
416427
err = db.QueryRowContext(ctx, "SELECT COUNT(1) FROM bookmarks WHERE user=?", user).Scan(&count)
417428
return count > 0, err
418429
}
419430

420-
func (p SQLProvider) CreateUser(ctx context.Context, user, password string) error {
421-
db, err := OpenDB()
431+
func (p *SQLProvider) CreateUser(ctx context.Context, user, password string) error {
432+
db, err := p.getDB()
422433
if err != nil {
423434
return err
424435
}
425-
defer db.Close()
426436

427437
var count int
428438
if err := db.QueryRowContext(ctx, "SELECT COUNT(1) FROM passwords WHERE user=?", user).Scan(&count); err != nil {
@@ -440,12 +450,11 @@ func (p SQLProvider) CreateUser(ctx context.Context, user, password string) erro
440450
return err
441451
}
442452

443-
func (p SQLProvider) SetPassword(ctx context.Context, user, password string) error {
444-
db, err := OpenDB()
453+
func (p *SQLProvider) SetPassword(ctx context.Context, user, password string) error {
454+
db, err := p.getDB()
445455
if err != nil {
446456
return err
447457
}
448-
defer db.Close()
449458

450459
hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
451460
if err != nil {
@@ -462,12 +471,11 @@ func (p SQLProvider) SetPassword(ctx context.Context, user, password string) err
462471
return nil
463472
}
464473

465-
func (p SQLProvider) CheckPassword(ctx context.Context, user, password string) (bool, error) {
466-
db, err := OpenDB()
474+
func (p *SQLProvider) CheckPassword(ctx context.Context, user, password string) (bool, error) {
475+
db, err := p.getDB()
467476
if err != nil {
468477
return false, err
469478
}
470-
defer db.Close()
471479

472480
var hash []byte
473481
err = db.QueryRowContext(ctx, "SELECT hash FROM passwords WHERE user=?", user).Scan(&hash)

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