Struct hdfs::HdfsFile

pub struct HdfsFile<'a> {
    // some fields omitted
}

open hdfs file

Methods

impl<'a> HdfsFile<'a>

fn available(&self) -> Result<bool, HdfsErr>

fn close(&self) -> Result<bool, HdfsErr>

Close the opened file

fn flush(&self) -> bool

Flush the data.

fn hflush(&self) -> bool

Flush out the data in client's user buffer. After the return of this call, new readers will see the data.

fn hsync(&self) -> bool

Similar to posix fsync, Flush out the data in client's user buffer. all the way to the disk device (but the disk may have it in its cache).

fn is_readable(&self) -> bool

Determine if a file is open for read.

fn is_writable(&self) -> bool

Determine if a file is open for write.

fn path(&'a self) -> &'a str

Return a file path

fn pos(&self) -> Result<u64, HdfsErr>

Get the current offset in the file, in bytes.

fn read(&self, buf: &mut [u8]) -> Result<i32, HdfsErr>

Read data from an open file.

fn read_with_pos(&self, pos: i64, buf: &mut [u8]) -> Result<i32, HdfsErr>

Positional read of data from an open file.

fn read_zc(&'a self, opts: &RzOptions, max_len: i32) -> Result<RzBuffer<'a>, HdfsErr>

Perform a byte buffer read. If possible, this will be a zero-copy (mmap) read.

fn seek(&self, offset: u64) -> bool

Seek to given offset in file.

fn write(&self, buf: &[u8]) -> Result<i32, HdfsErr>

Write data into an open file.