Rene Nochebuena
d9d07bcb70
database/sql-backed MySQL client with launcher lifecycle, health check, unit-of-work via context injection, and structured error mapping. What's included: - Executor / Tx / Client / Component interfaces using database/sql native types (sql.Result, *sql.Rows, *sql.Row) - Tx.Commit() / Tx.Rollback() without ctx, matching the honest database/sql contract - New(logger, cfg) constructor; *sql.DB opened in OnInit - Config struct with env-tag support for all pool tuning parameters - UnitOfWork via context injection; GetExecutor(ctx) returns active *sql.Tx or *sql.DB - HandleError mapping MySQLError.Number to xerrors codes (1062 → AlreadyExists, 1216/1217/1451/1452 → InvalidInput, ErrNoRows → NotFound) - Driver imported as mysqldrv alias to avoid package name collision - health.Checkable at LevelCritical; HealthCheck delegates to db.PingContext Tested-via: todo-api POC integration Reviewed-against: docs/adr/
32 lines
883 B
Go
32 lines
883 B
Go
package mysql
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import (
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"database/sql"
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"errors"
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mysqldrv "github.com/go-sql-driver/mysql"
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"code.nochebuena.dev/go/xerrors"
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)
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// HandleError maps MySQL and database/sql errors to xerrors types.
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// Also available as client.HandleError(err).
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func HandleError(err error) error {
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if err == nil {
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return nil
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}
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var mysqlErr *mysqldrv.MySQLError
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if errors.As(err, &mysqlErr) {
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switch mysqlErr.Number {
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case 1062: // ER_DUP_ENTRY
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return xerrors.New(xerrors.ErrAlreadyExists, "record already exists").WithError(err)
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case 1216, 1217, 1451, 1452: // foreign key violations
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return xerrors.New(xerrors.ErrInvalidInput, "data integrity violation").WithError(err)
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}
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}
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if errors.Is(err, sql.ErrNoRows) {
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return xerrors.New(xerrors.ErrNotFound, "record not found").WithError(err)
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}
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return xerrors.New(xerrors.ErrInternal, "unexpected database error").WithError(err)
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}
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