124 lines
2.5 KiB
Go
124 lines
2.5 KiB
Go
package db
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import (
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"allapp/conf"
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"allapp/db/repo"
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"context"
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"fmt"
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"time"
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"github.com/jackc/pgx/v5"
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"github.com/jackc/pgx/v5/pgxpool"
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)
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var (
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DB *pgxpool.Pool
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Queries *repo.Queries
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)
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type SQLCBatch interface {
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Exec(func(int, error))
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}
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func InitDB() {
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cfg := conf.GetConf().Pgsql
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sslMode := "disable"
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if cfg.SllMode {
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sslMode = "require"
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}
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dsn := fmt.Sprintf(
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"postgres://%s:%s@%s:%d/%s?sslmode=%s&TimeZone=%s",
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cfg.User, cfg.Password, cfg.Host, cfg.Port, cfg.Dbname, sslMode, cfg.TimeZone,
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)
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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defer cancel()
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// 使用可修改配置
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cfgPool, err := pgxpool.ParseConfig(dsn)
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if err != nil {
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panic(err)
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}
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// 给连接池参数设置默认值
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if cfg.MaxOpenConns <= 0 {
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cfg.MaxOpenConns = 10
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}
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if cfg.MaxIdleConns <= 0 {
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cfg.MaxIdleConns = 5
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}
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if cfg.ConnMaxLifetime <= 0 {
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cfg.ConnMaxLifetime = 30 * time.Minute
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}
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cfgPool.MaxConns = cfg.MaxOpenConns
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cfgPool.MinConns = cfg.MaxIdleConns
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cfgPool.MaxConnLifetime = cfg.ConnMaxLifetime
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pool, err := pgxpool.NewWithConfig(ctx, cfgPool)
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if err != nil {
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panic(err)
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}
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// 测试连接
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if err := pool.Ping(ctx); err != nil {
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panic(err)
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}
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DB = pool
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Queries = repo.New(DB)
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}
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// WithTx 执行事务，支持 panic 和 error 自动回滚
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// 默认使用全局 DB，调用更简洁
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func WithTx(ctx context.Context, fn func(q *repo.Queries) error) (err error) {
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return WithTxPool(ctx, DB, fn)
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}
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// WithTxPool 支持自定义连接池
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func WithTxPool(ctx context.Context, pool *pgxpool.Pool, fn func(q *repo.Queries) error) (err error) {
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tx, err := pool.BeginTx(ctx, pgx.TxOptions{})
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if err != nil {
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return err
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}
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defer func() {
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if p := recover(); p != nil {
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// panic 时回滚事务
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if rbErr := tx.Rollback(ctx); rbErr != nil {
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fmt.Printf("rollback failed during panic: %v\n", rbErr)
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}
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panic(p)
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} else if err != nil {
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// 回滚事务，并捕获 rollback 错误
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if rbErr := tx.Rollback(ctx); rbErr != nil {
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err = fmt.Errorf("rollback failed: %v, original error: %w", rbErr, err)
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}
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} else {
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// 提交事务，并捕获 commit 错误
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if commitErr := tx.Commit(ctx); commitErr != nil {
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err = fmt.Errorf("commit failed: %w", commitErr)
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}
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}
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}()
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q := Queries.WithTx(tx)
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err = fn(q)
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return err
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}
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// RunBatch 通用批处理执行器（适配所有 sqlc Batch）
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func RunBatch(ctx context.Context, batch SQLCBatch) error {
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var firstErr error
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batch.Exec(func(i int, err error) {
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if err != nil && firstErr == nil {
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firstErr = err
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}
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})
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return firstErr
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}
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