mdebray/tvl-depot
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refactor(main): Simplify receiver

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Departing from the initial approach. There's no reason to multithread
this for now.
This commit is contained in:
Vincent Ambo 2018-05-28 09:45:07 +02:00
parent 6793b25a67
commit 0db4512df4
1 changed files with 8 additions and 21 deletions
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29
src/main.rs
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@ -6,8 +6,6 @@ extern crate systemd;
use systemd::journal::*;
use std::process;
use std::thread;
use std::sync::mpsc::{channel, Receiver};
use std::time::{Duration, Instant};
use std::collections::vec_deque::{VecDeque, Drain};
@ -43,10 +41,11 @@ impl From<JournalRecord> for Record {
}
}
/// This function spawns a double-looped, blocking receiver. It will
/// buffer messages for a second before flushing them to Stackdriver.
fn receiver_loop(rx: Receiver<Record>) {
let mut buf = VecDeque::new();
/// This function starts a double-looped, blocking receiver. It will
/// buffer messages for half a second before flushing them to
/// Stackdriver.
fn receiver_loop(mut journal: Journal) {
let mut buf: VecDeque<Record> = VecDeque::new();
let iteration = Duration::from_millis(500);
loop {
@ -58,8 +57,8 @@ fn receiver_loop(rx: Receiver<Record>) {
break;
}
if let Ok(record) = rx.recv_timeout(iteration) {
buf.push_back(record);
if let Ok(Some(record)) = journal.await_next_record(Some(iteration)) {
buf.push_back(record.into());
}
}
@ -91,17 +90,5 @@ fn main () {
}
}
let (tx, rx) = channel();
let _receiver = thread::spawn(move || receiver_loop(rx));
journal.watch_all_elements(move |record| {
let record: Record = record.into();
if record.message.is_some() {
tx.send(record).ok();
}
Ok(())
}).expect("Failed to read new entries from journal");
receiver_loop(journal)
}