Struct LogWriter

pub struct LogWriter<T: LogSender + Unpin + 'static, S: AsyncWrite + Send + Unpin + 'static> { /* private fields */ }

A custom writer that tees to both stdout/stderr. It captures output lines and sends them to the child process.

Implementations

impl<T: LogSender + Unpin + 'static, S: AsyncWrite + Send + Unpin + 'static> LogWriter<T, S>

pub fn new(output_target: OutputTarget, std_writer: S, log_sender: T) -> Self

Creates a new LogWriter.

Arguments

• output_target - The target output stream (stdout or stderr)
• std_writer - The writer to use for stdout/stderr
• log_sender - The log sender to use for sending logs

impl<T: LogSender + Unpin + 'static> LogWriter<T, Box<dyn AsyncWrite + Send + Unpin>>

pub fn with_default_writer( local_rank: usize, output_target: OutputTarget, log_sender: T, ) -> Result<Self>

Creates a new LogWriter with the default stdout/stderr writer.

Arguments

• output_target - The target output stream (stdout or stderr)
• log_sender - The log sender to use for sending logs

Trait Implementations

impl<T: LogSender + Unpin + 'static, S: AsyncWrite + Send + Unpin + 'static> AsyncWrite for LogWriter<T, S>

fn poll_write( self: Pin<&mut Self>, cx: &mut TaskContext<'_>, buf: &[u8], ) -> Poll<Result<usize, Error>>

Attempt to write bytes from buf into the object.

fn poll_flush( self: Pin<&mut Self>, cx: &mut TaskContext<'_>, ) -> Poll<Result<(), Error>>

Attempts to flush the object, ensuring that any buffered data reach their destination.

fn poll_shutdown( self: Pin<&mut Self>, cx: &mut TaskContext<'_>, ) -> Poll<Result<(), Error>>

Initiates or attempts to shut down this writer, returning success when the I/O connection has completely shut down.

fn poll_write_vectored( self: Pin<&mut Self>, cx: &mut Context<'_>, bufs: &[IoSlice<'_>], ) -> Poll<Result<usize, Error>>

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

fn is_write_vectored(&self) -> bool

Determines if this writer has an efficient poll_write_vectored implementation.