Function init

plugins/src/logging.rs:50–77

Initialize the logger starting a flusher to the passed in sink.

(out: Arc<Mutex<FramedWrite<O, JsonCodec>>>)

/// Initialize the logger starting a flusher to the passed in sink.
pub async fn init<O>(out: Arc<Mutex<FramedWrite<O, JsonCodec>>>) -> Result<(), log::SetLoggerError>
where
    O: AsyncWrite + Send + Unpin + 'static,
{
    let out = out.clone();

    let filter_str = std::env::var("CLN_PLUGIN_LOG").unwrap_or("info".to_string());
    let filter = filter::Builder::new().parse(&filter_str).build();

    let (sender, mut receiver) = tokio::sync::mpsc::unbounded_channel::<LogEntry>();
    tokio::spawn(async move {
        while let Some(i) = receiver.recv().await {
            // We continue draining the queue, even if we get some
            // errors when forwarding. Forwarding could break due to
            // an interrupted connection or stdout being closed, but
            // keeping the messages in the queue is a memory leak.
            let payload = json!({
                "jsonrpc": "2.0",
                "method": "log",
                "params": i
            });

            let _ = out.lock().await.send(payload).await;
        }
    });
    log::set_boxed_logger(Box::new(PluginLogger { sender, filter }))
        .map(|()| log::set_max_level(log::LevelFilter::Debug))
}

impl log::Log for PluginLogger {
    fn enabled(&self, metadata: &Metadata) -> bool {