context

type Context interface {
	// GetTxn gets a transaction for futher execution.
	GetTxn(forceNew bool) (kv.Transaction, error)

	// FinishTxn commits or rolls back the current transaction.
	FinishTxn(rollback bool) error

	// SetValue saves a value associated with this context for key.
	SetValue(key fmt.Stringer, value interface{})

	// Value returns the value associated with this context for key.
	Value(key fmt.Stringer) interface{}

	// ClearValue clears the value associated with this context for key.
	ClearValue(key fmt.Stringer)
}