fileutil

Documentation

Index

• type RewindableReader
• type WriterThenReader
  • func NewFileWriterThenReader(basename string) (WriterThenReader, error)

Types

type RewindableReader

type RewindableReader interface {
	io.ReadSeeker
	// Rewind allows sets ResetableReader to start re-reading the same data.
	Rewind() error
	// Name() returns a user-visible name for underlying storage.  It may help debug some
	// issues.
	Name() string
}

RewindableReader allows repeatedly reading the same stream.

type WriterThenReader

type WriterThenReader interface {
	io.Writer
	// StartReading stops writing and returns a ResetableReader that will allow repeatedly
	// reading the data and the total length of data.  The WriterThenReader should be
	// discarded; calls to Write() after StartReading() will fail.
	StartReading() (RewindableReader, int64, error)
	// Name() returns a user-visible name for underlying storage.  It may help debug some
	// issues.
	Name() string
}

WriterThenReader writes data to storage, then allows reading it. It is suitable for repeatedly processing large volumes of data.

func NewFileWriterThenReader

func NewFileWriterThenReader(basename string) (WriterThenReader, error)