Struct parquet::file::writer::TrackedWrite

pub struct TrackedWrite<W: Write> { /* private fields */ }

A wrapper around a Write that keeps track of the number of bytes that have been written. The given Write is wrapped with a BufWriter to optimize writing performance.

Implementations

impl<W: Write> TrackedWrite<W>

pub fn new(inner: W) -> Self

Create a new TrackedWrite from a Write

pub fn bytes_written(&self) -> usize

Returns the number of bytes written to this instance

pub fn inner(&self) -> &W

Returns a reference to the underlying writer.

pub fn inner_mut(&mut self) -> &mut W

Returns a mutable reference to the underlying writer.

It is inadvisable to directly write to the underlying writer, doing so will likely result in data corruption

pub fn into_inner(self) -> Result<W>

Returns the underlying writer.

Trait Implementations

impl<W: Write> Write for TrackedWrite<W>

fn write(&mut self, buf: &[u8]) -> Result<usize>

Writes a buffer into this writer, returning how many bytes were written.

fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize>

Like write, except that it writes from a slice of buffers.

fn write_all(&mut self, buf: &[u8]) -> Result<()>

Attempts to write an entire buffer into this writer.

fn flush(&mut self) -> Result<()>

Flushes this output stream, ensuring that all intermediately buffered contents reach their destination.

fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)

Determines if this Writer has an efficient write_vectored implementation.

fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)

Attempts to write multiple buffers into this writer.

fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Creates a “by reference” adapter for this instance of Write.