/
main.go
79 lines (72 loc) · 1.51 KB
/
main.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
// This example uses ticket to amortize SQL transaction overhead
package main
import (
"context"
"database/sql"
"time"
"github.com/echlebek/ticket"
"golang.org/x/sync/errgroup"
_ "modernc.org/sqlite"
)
type QueryValues struct {
Name string
Bork int
}
type StmtJobHandler[Job QueryValues] struct {
Stmt *sql.Stmt
DB *sql.DB
}
func (j *StmtJobHandler[QueryValues]) Handle(ctx context.Context, values []QueryValues) (err error) {
tx, txerr := j.DB.Begin()
if txerr != nil {
return err
}
defer func () {
err = tx.Commit()
}()
stmt := tx.Stmt(j.Stmt)
for _, value := range values {
if _, err := stmt.Exec(value.Name, value.Bork); err != nil {
return err
}
}
return nil
}
var borksOutOf10 = map[string]int {
"susie": 13,
"sheena": 13,
"cody": 10,
"clause": 10,
"franklin": 11,
"oreo": 14,
"kiki": 1000000,
}
func main() {
db, err := sql.Open("sqlite", ":memory:")
if err != nil {
panic(err)
}
_, err = db.Exec(`CREATE TABLE dogs ( name TEXT, bork INTEGER );`)
if err != nil {
panic(err)
}
stmt, err := db.Prepare(`INSERT INTO dogs ( name, bork ) VALUES ( ?, ? )`)
if err != nil {
panic(err)
}
ctx := context.Background()
handler := StmtJobHandler[QueryValues]{
DB: db,
Stmt: stmt,
}
server := ticket.NewBatchServer[QueryValues](ctx, 100, time.Millisecond, &handler)
var eg errgroup.Group
for i := 0; i < 1000; i++ {
for name, borks := range borksOutOf10 {
eg.Go(server.Accept(QueryValues{Name: name, Bork: borks}).Wait)
}
}
if err := eg.Wait(); err != nil {
panic(err)
}
}