better log channel and fix up message frequency

veilid-core/src/network_manager.rs

@@ -221,7 +221,9 @@ impl NetworkManager {
         }
 
         // reset the state
-        *self.inner.lock() = Self::new_inner();
+        let mut inner = self.inner.lock();
+        inner.components = None;
+        inner.network_class = None;
 
         trace!("NetworkManager::shutdown end");
     }

veilid-server/src/client_log_channel.rs

@@ -1,45 +1,103 @@
-use async_std::channel::{bounded, Receiver, RecvError, Sender, TrySendError};
+use parking_lot::Mutex;
 use std::sync::Arc;
 
-#[derive(Debug)]
-struct ClientLogChannelInner {
-    sender: Sender<String>,
-    receiver: Receiver<String>,
+// Must use async_std channel to send to main thread from blocking thread
+use async_std::channel::bounded as async_bounded;
+use async_std::channel::Receiver as AsyncReceiver;
+pub use async_std::channel::RecvError;
+
+// Must use std mpsc so no logs are generated by async code
+use std::sync::mpsc::sync_channel as std_sync_channel;
+use std::sync::mpsc::SyncSender as StdSender;
+use std::sync::mpsc::TrySendError as StdTrySendError;
+
+//////////////////////////////////////////
+
+pub struct ClientLogChannelCloser {
+    sender: Arc<Mutex<Option<StdSender<String>>>>,
 }
 
-#[derive(Debug, Clone)]
-pub struct ClientLogChannel {
-    inner: Arc<ClientLogChannelInner>,
-}
-
-impl ClientLogChannel {
-    pub fn new() -> Self {
-        let (sender, receiver) = bounded(1024);
-        Self {
-            inner: Arc::new(ClientLogChannelInner { sender, receiver }),
-        }
-    }
-
-    pub async fn recv(&self) -> Result<String, RecvError> {
-        self.inner.receiver.recv().await
+impl ClientLogChannelCloser {
+    pub fn close(&self) {
+        // Drop the sender
+        self.sender.lock().take();
     }
 }
 
-impl std::io::Write for ClientLogChannel {
+//////////////////////////////////////////
+pub struct ClientLogChannelWriterShim {
+    sender: Arc<Mutex<Option<StdSender<String>>>>,
+}
+
+impl std::io::Write for ClientLogChannelWriterShim {
     fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
         let bufstr = String::from_utf8_lossy(buf).to_string();
-        if let Err(e) = self.inner.sender.try_send(bufstr) {
+        let sender = self.sender.lock();
+        if let Some(sender) = &*sender {
+            if let Err(e) = sender.try_send(bufstr) {
                 match e {
-                TrySendError::Full(_) => Err(std::io::Error::from(std::io::ErrorKind::WouldBlock)),
-                TrySendError::Closed(_) => {
+                    StdTrySendError::Full(_) => {
+                        Err(std::io::Error::from(std::io::ErrorKind::WouldBlock))
+                    }
+                    StdTrySendError::Disconnected(_) => {
                         Err(std::io::Error::from(std::io::ErrorKind::BrokenPipe))
                     }
                 }
             } else {
                 Ok(buf.len())
             }
+        } else {
+            Err(std::io::Error::from(std::io::ErrorKind::BrokenPipe))
+        }
     }
     fn flush(&mut self) -> std::io::Result<()> {
         Ok(())
     }
 }
+
+pub type ClientLogChannelWriter = std::io::LineWriter<ClientLogChannelWriterShim>;
+
+//////////////////////////////////////////
+
+pub struct ClientLogChannel {
+    async_receiver: AsyncReceiver<String>,
+}
+
+impl ClientLogChannel {
+    pub fn new() -> (Self, ClientLogChannelWriter, ClientLogChannelCloser) {
+        let (async_sender, async_receiver) = async_bounded(1024);
+        let (std_sender, std_receiver) = std_sync_channel(1024);
+        let shared_std_sender = Arc::new(Mutex::new(Some(std_sender)));
+
+        // Spawn a processing thread for the blocking std sender
+        async_std::task::spawn(async move {
+            #[allow(clippy::while_let_loop)]
+            loop {
+                let message = match std_receiver.recv() {
+                    Ok(v) => v,
+                    Err(_) => break,
+                };
+                if async_sender.send(message).await.is_err() {
+                    break;
+                }
+            }
+        });
+
+        (
+            Self { async_receiver },
+            ClientLogChannelWriter::with_capacity(
+                65536,
+                ClientLogChannelWriterShim {
+                    sender: shared_std_sender.clone(),
+                },
+            ),
+            ClientLogChannelCloser {
+                sender: shared_std_sender,
+            },
+        )
+    }
+
+    pub async fn recv(&mut self) -> Result<String, RecvError> {
+        self.async_receiver.recv().await
+    }
+}

veilid-server/src/unix.rs

@@ -13,6 +13,7 @@ use std::fs::OpenOptions;
 use std::path::Path;
 use std::str::FromStr;
 use std::sync::Arc;
+use std::time::{Duration, Instant};
 use veilid_core::xx::SingleShotEventual;
 
 fn parse_command_line(default_config_path: &OsStr) -> Result<clap::ArgMatches, clap::Error> {
@@ -187,6 +188,7 @@ pub async fn main() -> Result<(), String> {
     // Set up loggers
     let mut logs: Vec<Box<dyn SharedLogger>> = Vec::new();
     let mut client_log_channel: Option<ClientLogChannel> = None;
+    let mut client_log_channel_closer: Option<ClientLogChannelCloser> = None;
     let mut cb = ConfigBuilder::new();
     cb.add_filter_ignore_str("async_std");
     cb.add_filter_ignore_str("async_io");
@@ -228,12 +230,13 @@ pub async fn main() -> Result<(), String> {
         ))
     }
     if settingsr.logging.client.enabled {
-        let clog = ClientLogChannel::new();
-        client_log_channel = Some(clog.clone());
+        let (clog, clogwriter, clogcloser) = ClientLogChannel::new();
+        client_log_channel = Some(clog);
+        client_log_channel_closer = Some(clogcloser);
         logs.push(WriteLogger::new(
             settings::convert_loglevel(settingsr.logging.file.level),
             cb.build(),
-            std::io::LineWriter::with_capacity(65536, clog),
+            clogwriter,
         ))
     }
     CombinedLogger::init(logs).map_err(|e| format!("failed to init logs: {}", e))?;
@@ -284,26 +287,45 @@ pub async fn main() -> Result<(), String> {
     drop(settingsr);
 
     // Handle state changes on main thread for capnproto rpc
-    let capi_jh = capi.clone().map(|capi| {
+    let state_change_receiver_jh = capi.clone().map(|capi| {
         async_std::task::spawn_local(async move {
-            trace!("state change processing started");
             while let Ok(change) = receiver.recv().await {
                 capi.clone().handle_state_change(change);
             }
-            trace!("state change processing stopped");
         })
     });
     // Handle log messages on main thread for capnproto rpc
-    let capi_jh2 = capi
+    let client_log_receiver_jh = capi
         .clone()
         .map(|capi| {
-            client_log_channel.map(|client_log_channel| {
+            client_log_channel.take().map(|mut client_log_channel| {
                 async_std::task::spawn_local(async move {
-                    trace!("client logging started");
-                    while let Ok(message) = client_log_channel.recv().await {
-                        capi.clone().handle_client_log(message);
+                    // Batch messages to either 16384 chars at once or every second to minimize packets
+                    let rate = Duration::from_secs(1);
+                    let mut start = Instant::now();
+                    let mut messages = String::new();
+                    loop {
+                        let timeout_dur =
+                            rate.checked_sub(start.elapsed()).unwrap_or(Duration::ZERO);
+                        match async_std::future::timeout(timeout_dur, client_log_channel.recv())
+                            .await
+                        {
+                            Ok(Ok(message)) => {
+                                messages += &message;
+                                if messages.len() > 16384 {
+                                    capi.clone()
+                                        .handle_client_log(core::mem::take(&mut messages));
+                                    start = Instant::now();
+                                }
+                            }
+                            Ok(Err(_)) => break,
+                            Err(_) => {
+                                capi.clone()
+                                    .handle_client_log(core::mem::take(&mut messages));
+                                start = Instant::now();
+                            }
+                        }
                     }
-                    trace!("client logging stopped")
                 })
             })
         })
@@ -332,15 +354,22 @@ pub async fn main() -> Result<(), String> {
         c.stop().await;
     }
 
-    // Shut down Veilid API
+    // Shut down Veilid API to release state change sender
     veilid_api.shutdown().await;
 
-    // Wait for client api handlers to exit
-    if let Some(capi_jh) = capi_jh {
-        capi_jh.await;
+    // Close the client api log channel if it is open to release client log sender
+    if let Some(client_log_channel_closer) = client_log_channel_closer {
+        client_log_channel_closer.close();
     }
-    if let Some(capi_jh2) = capi_jh2 {
-        capi_jh2.await;
+
+    // Wait for state change receiver to exit
+    if let Some(state_change_receiver_jh) = state_change_receiver_jh {
+        state_change_receiver_jh.await;
+    }
+
+    // Wait for client api log receiver to exit
+    if let Some(client_log_receiver_jh) = client_log_receiver_jh {
+        client_log_receiver_jh.await;
     }
 
     Ok(())