Added stack size variability on dispatch

CHANGELOG.md

@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - `bot.forward`, `bot.edit_live_location`, `bot.stop_live_location`, `bot.set_reaction`, `bot.pin`, `bot.unpin`, `bot.edit_text`, `bot.edit_caption`, `bot.edit_media`, `bot.edit_reply_markup`, `bot.stop_poll_message`, `bot.delete` and `bot.copy` methods to the new `crate::sugar::bot::BotMessagesExt` trait
   - `req.reply_to` method to the new `crate::sugar::request::RequestReplyExt` trait
   - `req.disable_link_preview` method to the new `crate::sugar::request::RequestLinkPreviewExt` trait
+- `stack_size` setter to `DispatcherBuilder`
 
 ### Changed
 
@@ -28,6 +29,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Now Vec<MessageId> in requests serializes into [number] instead of [ {message_id: number} ], `forward_messages`, `copy_messages` and `delete_messages` now work properly
 - Now `InlineQueryResultsButton` serializes properly ([issue 1181](https://github.com/teloxide/teloxide/issues/1181))
 - Now `ThreadId` is able to serialize in multipart requests ([PR 1179](https://github.com/teloxide/teloxide/pull/1179))
+- Now stack does not overflow on dispatch ([issue 1154](https://github.com/teloxide/teloxide/issues/1154))
 
 ## 0.13.0 - 2024-08-16
 

crates/teloxide/Cargo.toml

@@ -89,7 +89,7 @@ dptree = "0.3.0"
 # Uncomment this if you want to test teloxide with a specific dptree commit
 # dptree = { git = "https://github.com/teloxide/dptree", rev = "df578e4" }
 
-tokio = { version = "1.39", features = ["fs"] }
+tokio = { version = "1.39", features = ["fs", "rt-multi-thread"] }
 tokio-util = "0.7"
 tokio-stream = "0.1.8"
 

crates/teloxide/src/dispatching/dispatcher.rs

@@ -5,6 +5,7 @@ use crate::{
     },
     error_handlers::{ErrorHandler, LoggingErrorHandler},
     requests::{Request, Requester},
+    stop::StopToken,
     types::{Update, UpdateKind},
     update_listeners::{self, UpdateListener},
 };
@@ -16,6 +17,7 @@ use futures::{
     stream::FuturesUnordered,
     FutureExt as _, StreamExt as _,
 };
+use tokio::runtime::Builder;
 use tokio_stream::wrappers::ReceiverStream;
 
 use std::{
@@ -29,6 +31,7 @@ use std::{
         atomic::{AtomicBool, AtomicU32, Ordering},
         Arc,
     },
+    thread,
 };
 
 /// The builder for [`Dispatcher`].
@@ -44,6 +47,7 @@ pub struct DispatcherBuilder<R, Err, Key> {
     ctrlc_handler: bool,
     distribution_f: fn(&Update) -> Option<Key>,
     worker_queue_size: usize,
+    stack_size: usize,
 }
 
 impl<R, Err, Key> DispatcherBuilder<R, Err, Key>
@@ -104,6 +108,14 @@ where
         Self { worker_queue_size: size, ..self }
     }
 
+    /// Specifies the stack size of the dispatcher.
+    ///
+    /// By default it's 8 * 1024 * 1024 bytes (8 MiB).
+    #[must_use]
+    pub fn stack_size(self, size: usize) -> Self {
+        Self { stack_size: size, ..self }
+    }
+
     /// Specifies the distribution function that decides how updates are grouped
     /// before execution.
     ///
@@ -176,6 +188,7 @@ where
             ctrlc_handler,
             distribution_f: _,
             worker_queue_size,
+            stack_size,
         } = self;
 
         DispatcherBuilder {
@@ -187,6 +200,7 @@ where
             ctrlc_handler,
             distribution_f: f,
             worker_queue_size,
+            stack_size,
         }
     }
 
@@ -202,6 +216,7 @@ where
             distribution_f,
             worker_queue_size,
             ctrlc_handler,
+            stack_size,
         } = self;
 
         // If the `ctrlc_handler` feature is not enabled, don't emit a warning.
@@ -216,6 +231,7 @@ where
             state: ShutdownToken::new(),
             distribution_f,
             worker_queue_size,
+            stack_size,
             workers: HashMap::new(),
             default_worker: None,
             current_number_of_active_workers: Default::default(),
@@ -258,6 +274,7 @@ pub struct Dispatcher<R, Err, Key> {
 
     distribution_f: fn(&Update) -> Option<Key>,
     worker_queue_size: usize,
+    stack_size: usize,
     current_number_of_active_workers: Arc<AtomicU32>,
     max_number_of_active_workers: Arc<AtomicU32>,
     // Tokio TX channel parts associated with chat IDs that consume updates sequentially.
@@ -297,6 +314,7 @@ where
         Err: Debug,
     {
         const DEFAULT_WORKER_QUEUE_SIZE: usize = 64;
+        const DEFAULT_STACK_SIZE: usize = 8 * 1024 * 1024;
 
         DispatcherBuilder {
             bot,
@@ -310,6 +328,7 @@ where
             ctrlc_handler: false,
             worker_queue_size: DEFAULT_WORKER_QUEUE_SIZE,
             distribution_f: default_distribution_function,
+            stack_size: DEFAULT_STACK_SIZE,
         }
     }
 }
@@ -318,7 +337,7 @@ impl<R, Err, Key> Dispatcher<R, Err, Key>
 where
     R: Requester + Clone + Send + Sync + 'static,
     Err: Send + Sync + 'static,
-    Key: Hash + Eq + Clone,
+    Key: Hash + Eq + Clone + Send,
 {
     /// Starts your bot with the default parameters.
     ///
@@ -355,8 +374,8 @@ where
         update_listener: UListener,
         update_listener_error_handler: Arc<Eh>,
     ) where
-        UListener: UpdateListener + 'a,
-        Eh: ErrorHandler<UListener::Err> + 'a,
+        UListener: UpdateListener + Send + 'a,
+        Eh: ErrorHandler<UListener::Err> + Send + Sync + 'a,
         UListener::Err: Debug,
     {
         self.try_dispatch_with_listener(update_listener, update_listener_error_handler)
@@ -377,8 +396,8 @@ where
         update_listener_error_handler: Arc<Eh>,
     ) -> Result<(), R::Err>
     where
-        UListener: UpdateListener + 'a,
-        Eh: ErrorHandler<UListener::Err> + 'a,
+        UListener: UpdateListener + Send + 'a,
+        Eh: ErrorHandler<UListener::Err> + Send + Sync + 'a,
         UListener::Err: Debug,
     {
         // FIXME: there should be a way to check if dependency is already inserted
@@ -391,11 +410,38 @@ where
         log::debug!("hinting allowed updates: {:?}", allowed_updates);
         update_listener.hint_allowed_updates(&mut allowed_updates.into_iter());
 
-        let mut stop_token = Some(update_listener.stop_token());
+        let stop_token = Some(update_listener.stop_token());
 
+        thread::scope(|scope| {
+            scope.spawn(move || {
+                let runtime = Builder::new_multi_thread()
+                    .thread_stack_size(self.stack_size)
+                    .enable_all()
+                    .build()
+                    .unwrap();
+
+                runtime.block_on(self.start_listening(
+                    update_listener,
+                    update_listener_error_handler,
+                    stop_token,
+                ));
+            });
+        });
+        Ok(())
+    }
+
+    async fn start_listening<'a, UListener, Eh>(
+        &'a mut self,
+        mut update_listener: UListener,
+        update_listener_error_handler: Arc<Eh>,
+        mut stop_token: Option<StopToken>,
+    ) where
+        UListener: UpdateListener + Send + 'a,
+        Eh: ErrorHandler<UListener::Err> + Send + Sync + 'a,
+        UListener::Err: Debug,
+    {
         self.state.start_dispatching();
 
-        {
         let stream = update_listener.as_stream();
         tokio::pin!(stream);
 
@@ -422,7 +468,6 @@ where
                 }
             }
         }
-        }
 
         self.workers
             .drain()
@@ -435,7 +480,6 @@ where
             .await;
 
         self.state.done();
-        Ok(())
     }
 
     async fn process_update<LErr, LErrHandler>(