sealrs 0.13.2

Set of classic asynchronous primitives (Actors, Executors, Futures / Promises)
Documentation 
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//! Actor dispatcher with strategy - thread pool and single actor / single thread in pool
use crate::executors::thread_pinned_executor::{ThreadPinnedExecutor, DistributionStrategy, TaskOptions};
use crate::executors::executor::{Executor,ExecutorTask};
use crate::actors::dispatcher::Dispatcher;
use crate::actors::actor_cell::ActorCell;
use crate::actors::local_actor_ref::LocalActorRef;
use crate::actors::abstract_actor_ref::AbstractActorRef;
use crate::actors::actor_context::ActorContext;
use crate::actors::envelope::Envelope;
use crate::actors::mailbox::Mailbox;
use crate::actors::actor::{Actor, PoisonPill};
use crate::actors::message::Message;
use crate::common::tsafe::TSafe;
use std::any::Any;

pub struct DefaultDispatcher {
    executor: ThreadPinnedExecutor,
    rounds: usize
}

impl DefaultDispatcher {
    pub fn new(t_count: u32) -> DefaultDispatcher {
        let executor = ThreadPinnedExecutor::new()
            .set_distribution_strategy(DistributionStrategy::Load)
            .set_threads_count(t_count as usize)
            .run();
        DefaultDispatcher {
            executor,
            rounds: 0
        }
    }

    pub fn invoke(mailbox: &TSafe<Mailbox + Send>, actor: &TSafe<Actor + Send>, cell: &TSafe<ActorCell>) {
        let envelope = {
            let mut mailbox = mailbox.lock().unwrap();
            if mailbox.has_messages() {
                Some(mailbox.dequeue())
            } else {
                None
            }
        };

        if envelope.is_some() {
            let envelope = envelope.unwrap();

            let sender: Box<AbstractActorRef + Send> = {
                if envelope.sender.is_some() {
                    envelope.sender.unwrap()
                } else {
                    let mut system = envelope.system.lock().unwrap();
                    let dead_letters = system.dead_letters();
                    dead_letters
                }
            };


            let msg = envelope.message;

            let handled = {
                let im = {
                    let mut actor = actor.lock().unwrap();
                    let ctx = ActorContext::new(
                        sender.clone(),
                        envelope.receiver.clone(),
                        envelope.system.clone(),
                        cell.clone());
                    actor.receive(msg.clone(), ctx)
                };

                if im.is_ok() {
                    im.ok().unwrap()
                } else {
                    let f = cell.lock().unwrap().fail(im.err().unwrap(), cell.clone());
                    f();
                    true
                }
            };

            if !handled {
                let handled2 = DefaultDispatcher::internal_receive(mailbox, msg.clone(), cell);
                if !handled2 {
                    let mut dead_letters = {
                        let mut system = envelope.system.lock().unwrap();
                        let dead_letters = system.dead_letters();
                        dead_letters
                    };
                    let dc = dead_letters.cell();
                    let mut dc = dc.lock().unwrap();
                    dc.send(&dead_letters.cell(), msg, Some(sender), envelope.receiver );
                    println!("xxx");
                }
            }
        }

        mailbox.lock().unwrap().set_planned(false);
    }

    pub fn internal_receive(mailbox: &TSafe<Mailbox + Send>, msg: Message, cell: &TSafe<ActorCell>) -> bool {

        if let Some(PoisonPill {}) = msg.get().downcast_ref::<PoisonPill>() {
            {
                let mut cell_u = cell.lock().unwrap();
                cell_u.suspend();
                let dead_letters = cell_u.system.lock().unwrap().dead_letters();
                mailbox.lock().unwrap().clean_up(Box::new(LocalActorRef::new(cell.clone(), cell_u.path.clone())), dead_letters);
            }

            let f = cell.lock().unwrap().stop(cell.clone());
            f();
        } else {
            return false
        }

        true
    }


}

impl Executor for DefaultDispatcher {
    fn execute(&mut self, f: ExecutorTask, options: Option<Box<Any>>) {
        self.executor.execute(f, options)
    }

    fn stop(&mut self) {
        self.executor.stop();
    }
}

impl Dispatcher for DefaultDispatcher {

    fn dispatch(self: &mut Self, cell: TSafe<ActorCell>, bid: usize, mailbox: TSafe<Mailbox + Send>, actor: TSafe<Actor + Send>, envelope: Envelope) {
        let mut mailbox_u = mailbox.lock().unwrap();
        mailbox_u.enqueue(envelope);
        //if !mailbox_u.is_planned() {
            //mailbox_u.set_planned(true);

            let mailbox = mailbox.clone();
            let f = Box::new(move || {
                DefaultDispatcher::invoke(&mailbox, &actor, &cell)
            });

            self.execute(f,  Some( Box::new(TaskOptions { thread_id: Some(bid) } )))
        //}
    }

    fn obtain_bid(self: &mut Self) -> usize {
        if self.rounds == self.executor.get_threads_count() - 1 {
            self.rounds = 0;
        } else {
            self.rounds = self.rounds + 1;
        }

        self.rounds
    }
}