67 lines
2.4 KiB
Cheetah
67 lines
2.4 KiB
Cheetah
package servicecontext
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import (
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"context"
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{{if eq .Database "mysql"}}"fmt"
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"time"
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"git.yuntuo.hk/k2safe/go-omni/database"
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"github.com/go-sql-driver/mysql"{{end}}
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"git.yuntuo.hk/k2safe/go-omni/health"
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"git.yuntuo.hk/k2safe/go-omni/logx"
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"{{.Module}}/internal/repository"
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)
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// Context owns infrastructure dependencies shared by the service layer.
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// Add database, cache and external clients here as the project grows.
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type Context struct {
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Logger *logx.Logger
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Users repository.UserRepository
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Health *health.Checker
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{{if eq .Database "mysql"}}DB *database.DB{{end}}
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}
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// New initializes the project's dependencies before the HTTP listener opens.
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// The caller owns Logger; Close releases only resources created here.
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func New(ctx context.Context, logger *logx.Logger) (*Context, error) {
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if ctx == nil { ctx = context.Background() }
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if err := ctx.Err(); err != nil { return nil, err }
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checker, err := health.New()
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if err != nil { return nil, err }
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services := &Context{Logger: logger, Health: checker}
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{{if eq .Database "mysql"}}
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cfg, err := database.ConfigFromEnv("")
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if err != nil { return nil, err }
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if cfg.Driver != "mysql" { return nil, fmt.Errorf("this project requires GO_OMNI_DB_DRIVER=mysql") }
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dsn, err := mysql.ParseDSN(cfg.DSN)
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if err != nil { return nil, fmt.Errorf("parse mysql connection settings: %w", err) }
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if dsn.DBName == "" { return nil, fmt.Errorf("mysql connection settings require a database name") }
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// DATETIME columns are returned as time.Time in UTC in the business model.
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dsn.ParseTime = true
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dsn.Loc = time.UTC
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cfg.DSN = dsn.FormatDSN()
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db, err := database.Open(ctx, cfg)
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if err != nil { return nil, err }
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users := repository.NewMySQLUsers(db.DB)
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checkCtx, cancel := context.WithTimeout(ctx, cfg.PingTimeout)
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defer cancel()
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if err := users.CheckSchema(checkCtx); err != nil {
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_ = db.Close()
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return nil, fmt.Errorf("check users schema (apply schema.sql before starting): %w", err)
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}
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if err := checker.Add(health.Probe{Name: "database", Timeout: cfg.PingTimeout, Check: db.Health}); err != nil {
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_ = db.Close()
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return nil, err
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}
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services.DB, services.Users = db, users
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{{else}}
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services.Users = repository.NewMemoryUsers()
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{{end}}
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return services, nil
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}
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// Close is safe to call on startup failure and again during application exit.
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func (c *Context) Close() error {
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{{if eq .Database "mysql"}}if c != nil && c.DB != nil { return c.DB.Close() }{{end}}
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return nil
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}
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