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#![warn(missing_docs)]
#[macro_use]
extern crate slog;
extern crate slog_extra;
extern crate thread_local;
use slog::{Drain, DrainExt};
use std::cell::RefCell;
use std::sync::Mutex;
use std::io;
use slog::Record;
use slog_extra::Async;
use slog::OwnedKeyValueList;
include!("format.rs");
thread_local! {
static TL_BUF: RefCell<Vec<u8>> = RefCell::new(Vec::with_capacity(128))
}
pub struct Streamer<W: io::Write, F: Format> {
io: Mutex<W>,
format: F,
}
impl<W: io::Write, F: Format> Streamer<W, F> {
pub fn new(io: W, format: F) -> Self {
Streamer {
io: Mutex::new(io),
format: format,
}
}
}
impl<W: 'static + io::Write + Send, F: Format + Send> Drain for Streamer<W, F> {
type Error = io::Error;
fn log(&self, info: &Record, logger_values: &OwnedKeyValueList) -> io::Result<()> {
TL_BUF.with(|buf| {
let mut buf = buf.borrow_mut();
let res = {
|| {
try!(self.format.format(&mut *buf, info, logger_values));
{
let mut io = try!(self.io
.lock()
.map_err(|_| io::Error::new(io::ErrorKind::Other, "lock error")));
try!(io.write_all(&buf));
}
Ok(())
}
}();
buf.clear();
res
})
}
}
pub fn stream<W: io::Write + Send, F: Format>(io: W, format: F) -> Streamer<W, F> {
Streamer::new(io, format)
}
pub fn async_stream<W: io::Write + Send + 'static, F: Format + Send + 'static>(io: W,
format: F)
-> Async {
Async::new(Streamer::new(io, format).fuse())
}