1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154

use crossbeam_channel::RecvTimeoutError;
use derive_aktor::derive_actor;
use log::info;
use notify::event::{CreateKind, Event as FsEvent};
use notify::{Config, Event, EventKind, RecommendedWatcher, RecursiveMode, Watcher};
use std::time::Duration;
use tokio::sync::mpsc::{channel, Receiver, Sender};

use async_trait::async_trait;

use crate::completion_event_serializer::CompletionEventSerializer;
use crate::completion_handler::CompletionHandler;
use crate::consumer::Consumer;
use crate::error::Error;
use crate::event_handler::OutputEvent;
use crate::event_processor::EventProcessorActor;
use crate::fs_completion_handler::FsCompletionHandlerActor;
use std::fmt::Debug;

pub struct FsNotifyConsumerHandler<Err, CE, EventSerializer>
where
    Err: Debug + Send + Sync + Clone + 'static,
    CE: Send + Sync + Clone + 'static,
    EventSerializer: CompletionEventSerializer<
            CompletedEvent = CE,
            Output = Vec<u8>,
            Error = crate::error::Error<Err>,
        > + Send
        + Sync
        + Clone
        + 'static,
{
    watcher: Option<RecommendedWatcher>,
    rx: crossbeam_channel::Receiver<FsEvent>,
    self_actor: Option<FsNotifyConsumerHandlerActor<Err, CE, EventSerializer>>,
    completion_handler: FsCompletionHandlerActor<Err, CE, EventSerializer>,
}

impl<Err, CE, EventSerializer> FsNotifyConsumerHandler<Err, CE, EventSerializer>
where
    Err: Debug + Send + Sync + Clone + 'static,
    CE: Send + Sync + Clone + 'static,
    EventSerializer: CompletionEventSerializer<
            CompletedEvent = CE,
            Output = Vec<u8>,
            Error = crate::error::Error<Err>,
        > + Send
        + Sync
        + Clone
        + 'static,
{
    pub fn new(
        directory: impl AsRef<str>,
        completion_handler: FsCompletionHandlerActor<Err, CE, EventSerializer>,
    ) -> Self {
        let directory = directory.as_ref();
        let (tx, rx) = crossbeam_channel::unbounded();

        let mut watcher: RecommendedWatcher =
            Watcher::new_immediate(move |res: Result<FsEvent, notify::Error>| {
                tx.send(res.unwrap()).unwrap()
            })
            .expect("Watched failed to init");

        watcher
            .configure(Config::PreciseEvents(true))
            .expect(&format!("watcher.configure {}", directory));
        watcher
            .watch(directory, RecursiveMode::Recursive)
            .expect(&format!("watcher.watch {}", directory));

        Self {
            watcher: Some(watcher),
            rx,
            self_actor: None,
            completion_handler,
        }
    }
}

#[derive_actor]
impl<
        Err: Debug + Send + Sync + Clone + 'static,
        CE: Send + Sync + Clone + 'static,
        EventSerializer: CompletionEventSerializer<
                CompletedEvent = CE,
                Output = Vec<u8>,
                Error = crate::error::Error<Err>,
            > + Send
            + Sync
            + Clone
            + 'static,
    > FsNotifyConsumerHandler<Err, CE, EventSerializer>
{
    pub async fn get_next_event(&mut self, event_processor: EventProcessorActor<FsEvent>) {
        info!("Received get_next_event request");
        match self.rx.recv_timeout(Duration::from_secs(2)) {
            Ok(event) => match event.kind {
                EventKind::Create(CreateKind::File) => {
                    info!("Sending a file create event");
                    event_processor.process_event(event).await;
                }
                e => {
                    info!("Received non-create event: {:?}", e);
                    self.self_actor
                        .clone()
                        .unwrap()
                        .get_next_event(event_processor)
                        .await;
                }
            },
            Err(e) => {
                info!("Timeout, forcing ack");
                // self.watcher = None;
                let (tx, shutdown_notify) = tokio::sync::oneshot::channel();
                self.completion_handler.ack_all(Some(tx)).await;

                let _ = shutdown_notify.await;

                self.self_actor
                    .clone()
                    .unwrap()
                    .get_next_event(event_processor)
                    .await;
                // // event_processor.stop_processing().await;
                // event_processor.release().await;
                // self.completion_handler.clone().release().await;
                // self.self_actor.clone().unwrap().release().await;
            }
        }
    }

    pub fn _phantom(&self, _p: std::marker::PhantomData<(Err, CE, EventSerializer)>) {}
}

#[async_trait]
impl<Err, CE, EventSerializer> Consumer<FsEvent>
    for FsNotifyConsumerHandlerActor<Err, CE, EventSerializer>
where
    Err: Debug + Clone + Send + Sync + Clone + 'static,
    CE: Send + Sync + Clone + 'static,
    EventSerializer: CompletionEventSerializer<
            CompletedEvent = CE,
            Output = Vec<u8>,
            Error = crate::error::Error<Err>,
        > + Send
        + Sync
        + Clone
        + 'static,
{
    async fn get_next_event(&self, event_processor: EventProcessorActor<Event>) {
        FsNotifyConsumerHandlerActor::get_next_event(self, event_processor).await
    }
}