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use std::sync::{Arc, Mutex};
use std::sync::mpsc::{Receiver, sync_channel, SyncSender};
use std::thread;
use std::time::Duration;
use serde_gelf::{GelfLevel, GelfRecord, GelfRecordGetter};
use crate::buffer::{Buffer, Event, Metronome};
use crate::config::Config;
use crate::logger::GelfLogger;
use crate::output::GelfTcpOutput;
use crate::result::Result;
static mut BATCH_PROCESSOR: &'static Batch = &NoProcessor;
pub fn set_boxed_processor(processor: Box<Batch>) -> Result<()> {
set_processor_inner(|| unsafe { &*Box::into_raw(processor) })
}
fn set_processor_inner<F>(make_processor: F) -> Result<()> where F: FnOnce() -> &'static Batch {
unsafe {
BATCH_PROCESSOR = make_processor();
Ok(())
}
}
pub fn init_from_file(path: &str) -> Result<()> {
init(Config::try_from_yaml(path)?)
}
pub fn init(cfg: Config) -> Result<()> {
let (tx, rx): (SyncSender<Event>, Receiver<Event>) = sync_channel(10_000_000);
if let &Some(duration) = cfg.buffer_duration() {
let ctx = tx.clone();
Metronome::start(duration, ctx);
}
let gelf_level = cfg.level().clone();
let log_level = log::Level::from(&gelf_level);
let logger = GelfLogger::new(log_level);
let arx = Arc::new(Mutex::new(rx));
thread::spawn(move || {
let _ = Buffer::new(arx, GelfTcpOutput::from(&cfg)).run();
});
log::set_boxed_logger(Box::new(logger)).unwrap();
log::set_max_level(log_level.to_level_filter());
let _ = set_boxed_processor(Box::new(BatchProcessor::new(tx, gelf_level)))?;
Ok(())
}
pub fn flush() -> Result<()> {
processor().flush()
}
pub trait Batch {
fn send(&self, rec: &GelfRecord) -> Result<()>;
fn flush(&self) -> Result<()>;
}
pub struct NoProcessor;
impl Batch for NoProcessor {
fn send(&self, _rec: &GelfRecord) -> Result<()> { Ok(()) }
fn flush(&self) -> Result<()> { Ok(()) }
}
pub struct BatchProcessor {
tx: SyncSender<Event>,
level: GelfLevel,
}
impl BatchProcessor {
pub fn new(tx: SyncSender<Event>, level: GelfLevel) -> BatchProcessor {
BatchProcessor { tx, level }
}
}
impl Batch for BatchProcessor {
fn send(&self, rec: &GelfRecord) -> Result<()> {
if self.level >= rec.level() {
self.tx.send(Event::Data(rec.clone()))?;
}
Ok(())
}
fn flush(&self) -> Result<()> {
let _ = self.tx.send(Event::Send)?;
Ok(thread::sleep(Duration::from_secs(2)))
}
}
#[doc(hidden)]
pub fn processor() -> &'static Batch { unsafe { BATCH_PROCESSOR } }