Struct RollingFileWriter 

pub struct RollingFileWriter {
    base_path: PathBuf,
    max_bytes: u64,
    max_files: usize,
    file: BufWriter<File>,
    current_size: u64,
}

Rotation is decided from the current write call’s length, so a caller must hand over one whole record per call and keep it under the buffer capacity - a partial write re-enters the check with only the remainder.

Fields

base_path: PathBuf

max_bytes: u64

max_files: usize

file: BufWriter<File>

current_size: u64

Implementations

impl RollingFileWriter

pub fn new( path: &Path, append: bool, max_bytes: u64, max_files: usize, ) -> Result<Self>

fn rotate_if_needed(&mut self, incoming_len: usize) -> Result<()>

Trait Implementations

impl Debug for RollingFileWriter

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Write for RollingFileWriter

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

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

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

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

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

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

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

Attempts to write an entire buffer into this writer.

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, args: 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.