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options.go
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options.go
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package mysql
import (
"time"
"github.com/spf13/pflag"
)
const AddressConfigKey = "mysql-address"
type Options struct {
MigrationPath string
MaxOpenConnections int
MaxIdleConnections int
MaxConnectionLifetime time.Duration
}
type Option func(*Options)
func MigrationPath(path string) Option {
return func(options *Options) {
options.MigrationPath = path
}
}
func MaxOpenConnections(connLimit int) Option {
return func(options *Options) {
options.MaxOpenConnections = connLimit
}
}
func MaxIdleConnections(connLimit int) Option {
return func(options *Options) {
options.MaxIdleConnections = connLimit
}
}
func MaxConnectionLifetime(maxLifetime time.Duration) Option {
return func(options *Options) {
options.MaxConnectionLifetime = maxLifetime
}
}
func Flags() *pflag.FlagSet {
fs := pflag.NewFlagSet("mysql", pflag.ContinueOnError)
fs.String(AddressConfigKey, "root:root@tcp(localhost:3306)/database?parseTime=true", "mysql connection string")
return fs
}
func newOptions(opts ...Option) *Options {
opt := &Options{
MigrationPath: "migrations",
MaxOpenConnections: 25,
MaxIdleConnections: 25,
MaxConnectionLifetime: 5 * time.Minute,
}
for _, o := range opts {
o(opt)
}
return opt
}