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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
//! Traits, implementations, and macros related to logging timely events.

/// Type alias for logging timely events.
pub type WorkerIdentifier = usize;
/// Logger type for worker-local logging.
pub type Logger<Event> = crate::logging_core::Logger<Event, WorkerIdentifier>;
/// Logger for timely dataflow system events.
pub type TimelyLogger = Logger<TimelyEvent>;
/// Logger for timely dataflow progress events (the "timely/progress" log stream).
pub type TimelyProgressLogger = Logger<TimelyProgressEvent>;

use std::time::Duration;
use crate::dataflow::operators::capture::{Event, EventPusher};

/// Logs events as a timely stream, with progress statements.
pub struct BatchLogger<T, E, P> where P: EventPusher<Duration, (Duration, E, T)> {
    // None when the logging stream is closed
    time: Duration,
    event_pusher: P,
    _phantom: ::std::marker::PhantomData<(E, T)>,
}

impl<T, E, P> BatchLogger<T, E, P> where P: EventPusher<Duration, (Duration, E, T)> {
    /// Creates a new batch logger.
    pub fn new(event_pusher: P) -> Self {
        BatchLogger {
            time: Default::default(),
            event_pusher,
            _phantom: ::std::marker::PhantomData,
        }
    }
    /// Publishes a batch of logged events and advances the capability.
    pub fn publish_batch(&mut self, &time: &Duration, data: &mut Vec<(Duration, E, T)>) {
        if !data.is_empty() {
            self.event_pusher.push(Event::Messages(self.time, data.drain(..).collect()));
        }
        if self.time < time {
            let new_frontier = time;
            let old_frontier = self.time;
            self.event_pusher.push(Event::Progress(vec![(new_frontier, 1), (old_frontier, -1)]));
        }
        self.time = time;
    }
}
impl<T, E, P> Drop for BatchLogger<T, E, P> where P: EventPusher<Duration, (Duration, E, T)> {
    fn drop(&mut self) {
        self.event_pusher.push(Event::Progress(vec![(self.time, -1)]));
    }
}

#[derive(Serialize, Deserialize, Abomonation, Debug, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
/// The creation of an `Operate` implementor.
pub struct OperatesEvent {
    /// Worker-unique identifier for the operator.
    pub id: usize,
    /// Sequence of nested scope identifiers indicating the path from the root to this instance.
    pub addr: Vec<usize>,
    /// A helpful name.
    pub name: String,
}

#[derive(Serialize, Deserialize, Abomonation, Debug, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
/// The creation of a channel between operators.
pub struct ChannelsEvent {
    /// Worker-unique identifier for the channel
    pub id: usize,
    /// Sequence of nested scope identifiers indicating the path from the root to this instance.
    pub scope_addr: Vec<usize>,
    /// Source descriptor, indicating operator index and output port.
    pub source: (usize, usize),
    /// Target descriptor, indicating operator index and input port.
    pub target: (usize, usize),
}

/// Encapsulates Any and Debug for dynamically typed timestamps in logs
pub trait ProgressEventTimestamp: std::fmt::Debug + std::any::Any {
    /// Upcasts this `ProgressEventTimestamp` to `Any`.
    ///
    /// NOTE: This is required until <https://github.com/rust-lang/rfcs/issues/2765> is fixed
    ///
    /// # Example
    /// ```rust
    /// let ts = vec![(0usize, 0usize, (23u64, 10u64), -4i64), (0usize, 0usize, (23u64, 11u64), 1i64)];
    /// let ts: &timely::logging::ProgressEventTimestampVec = &ts;
    /// for (n, p, t, d) in ts.iter() {
    ///     print!("{:?}, ", (n, p, t.as_any().downcast_ref::<(u64, u64)>(), d));
    /// }
    /// println!();
    /// ```
    fn as_any(&self) -> &dyn std::any::Any;

    /// Returns the name of the concrete type of this object.
    ///
    /// # Note
    ///
    /// This is intended for diagnostic use. The exact contents and format of the
    /// string returned are not specified, other than being a best-effort
    /// description of the type. For example, amongst the strings
    /// that `type_name::<Option<String>>()` might return are `"Option<String>"` and
    /// `"std::option::Option<std::string::String>"`.
    fn type_name(&self) -> &'static str;
}
impl<T: crate::Data + std::fmt::Debug + std::any::Any> ProgressEventTimestamp for T {
    fn as_any(&self) -> &dyn std::any::Any { self }

    fn type_name(&self) -> &'static str { std::any::type_name::<T>() }
}

/// A vector of progress updates in logs
///
/// This exists to support upcasting of the concrecte progress update vectors to
/// `dyn ProgressEventTimestamp`. Doing so at the vector granularity allows us to
/// use a single allocation for the entire vector (as opposed to a `Box` allocation
/// for each dynamically typed element).
pub trait ProgressEventTimestampVec: std::fmt::Debug + std::any::Any {
    /// Iterate over the contents of the vector
    fn iter<'a>(&'a self) -> Box<dyn Iterator<Item=(&'a usize, &'a usize, &'a dyn ProgressEventTimestamp, &'a i64)>+'a>;
}

impl<T: ProgressEventTimestamp> ProgressEventTimestampVec for Vec<(usize, usize, T, i64)> {
    fn iter<'a>(&'a self) -> Box<dyn Iterator<Item=(&'a usize, &'a usize, &'a dyn ProgressEventTimestamp, &'a i64)>+'a> {
        Box::new(<[(usize, usize, T, i64)]>::iter(&self[..]).map(|(n, p, t, d)| {
            let t: &dyn ProgressEventTimestamp = t;
            (n, p, t, d)
        }))
    }
}

#[derive(Debug)]
/// Send or receive of progress information.
pub struct TimelyProgressEvent {
    /// `true` if the event is a send, and `false` if it is a receive.
    pub is_send: bool,
    /// Source worker index.
    pub source: usize,
    /// Communication channel identifier
    pub channel: usize,
    /// Message sequence number.
    pub seq_no: usize,
    /// Sequence of nested scope identifiers indicating the path from the root to this instance.
    pub addr: Vec<usize>,
    /// List of message updates, containing Target descriptor, timestamp as string, and delta.
    pub messages: Box<dyn ProgressEventTimestampVec>,
    /// List of capability updates, containing Source descriptor, timestamp as string, and delta.
    pub internal: Box<dyn ProgressEventTimestampVec>,
}

#[derive(Serialize, Deserialize, Abomonation, Debug, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
/// External progress pushed onto an operator
pub struct PushProgressEvent {
    /// Worker-unique operator identifier
    pub op_id: usize,
}

#[derive(Serialize, Deserialize, Abomonation, Debug, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
/// Message send or receive event
pub struct MessagesEvent {
    /// `true` if send event, `false` if receive event.
    pub is_send: bool,
    /// Channel identifier
    pub channel: usize,
    /// Source worker index.
    pub source: usize,
    /// Target worker index.
    pub target: usize,
    /// Message sequence number.
    pub seq_no: usize,
    /// Number of typed records in the message.
    pub length: usize,
}

/// Records the starting and stopping of an operator.
#[derive(Serialize, Deserialize, Abomonation, Debug, Clone, Hash, PartialEq, Eq, Ord, PartialOrd)]
pub enum StartStop {
    /// Operator starts.
    Start,
    /// Operator stops.
    Stop,
}

#[derive(Serialize, Deserialize, Abomonation, Debug, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
/// Operator start or stop.
pub struct ScheduleEvent {
    /// Worker-unique identifier for the operator, linkable to the identifiers in `OperatesEvent`.
    pub id: usize,
    /// `Start` if the operator is starting, `Stop` if it is stopping.
    /// activity is true if it looks like some useful work was performed during this call (data was
    /// read or written, notifications were requested / delivered)
    pub start_stop: StartStop,
}

impl ScheduleEvent {
    /// Creates a new start scheduling event.
    pub fn start(id: usize) -> Self { ScheduleEvent { id, start_stop: StartStop::Start } }
    /// Creates a new stop scheduling event and reports whether work occurred.
    pub fn stop(id: usize) -> Self { ScheduleEvent { id, start_stop: StartStop::Stop } }
}

#[derive(Serialize, Deserialize, Abomonation, Debug, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
/// Operator shutdown.
pub struct ShutdownEvent {
    /// Worker-unique identifier for the operator, linkable to the identifiers in `OperatesEvent`.
    pub id: usize,
}

#[derive(Serialize, Deserialize, Abomonation, Debug, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
/// Application-defined code start or stop
pub struct ApplicationEvent {
    /// Unique event type identifier
    pub id: usize,
    /// True when activity begins, false when it stops
    pub is_start: bool,
}

#[derive(Serialize, Deserialize, Abomonation, Debug, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
/// Application-defined code start or stop
pub struct GuardedMessageEvent {
    /// True when activity begins, false when it stops
    pub is_start: bool,
}

#[derive(Serialize, Deserialize, Abomonation, Debug, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
/// Application-defined code start or stop
pub struct GuardedProgressEvent {
    /// True when activity begins, false when it stops
    pub is_start: bool,
}

#[derive(Serialize, Deserialize, Abomonation, Debug, PartialEq, Eq, Hash, Clone, Copy)]
/// Identifier of the worker that generated a log line
pub struct TimelySetup {
    /// Worker index
    pub index: usize,
}

#[derive(Serialize, Deserialize, Abomonation, Debug, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
/// Kind of communication channel
pub enum CommChannelKind {
    /// Communication channel carrying progress information
    Progress,
    /// Communication channel carrying data
    Data,
}

#[derive(Serialize, Deserialize, Abomonation, Debug, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
/// Event on a communication channel
pub struct CommChannelsEvent {
    /// Communication channel identifier
    pub identifier: usize,
    /// Kind of communication channel (progress / data)
    pub kind: CommChannelKind,
}

#[derive(Serialize, Deserialize, Abomonation, Debug, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
/// Input logic start/stop
pub struct InputEvent {
    /// True when activity begins, false when it stops
    pub start_stop: StartStop,
}

/// Records the starting and stopping of an operator.
#[derive(Serialize, Deserialize, Abomonation, Debug, Clone, Hash, PartialEq, Eq, Ord, PartialOrd)]
pub enum ParkEvent {
    /// Worker parks.
    Park(Option<Duration>),
    /// Worker unparks.
    Unpark,
}

impl ParkEvent {
    /// Creates a new park event from the supplied duration.
    pub fn park(duration: Option<Duration>) -> Self { ParkEvent::Park(duration) }
    /// Creates a new unpark event.
    pub fn unpark() -> Self { ParkEvent::Unpark }
}

#[derive(Serialize, Deserialize, Debug, Clone, Abomonation, Hash, Eq, PartialEq, Ord, PartialOrd)]
/// An event in a timely worker
pub enum TimelyEvent {
    /// Operator creation.
    Operates(OperatesEvent),
    /// Channel creation.
    Channels(ChannelsEvent),
    /// Progress propagation (reasoning).
    PushProgress(PushProgressEvent),
    /// Message send or receive.
    Messages(MessagesEvent),
    /// Operator start or stop.
    Schedule(ScheduleEvent),
    /// Operator shutdown.
    Shutdown(ShutdownEvent),
    /// No clue.
    Application(ApplicationEvent),
    /// Per-message computation.
    GuardedMessage(GuardedMessageEvent),
    /// Per-notification computation.
    GuardedProgress(GuardedProgressEvent),
    /// Communication channel event.
    CommChannels(CommChannelsEvent),
    /// Input event.
    Input(InputEvent),
    /// Park event.
    Park(ParkEvent),
    /// Unstructured event.
    Text(String),
}

impl From<OperatesEvent> for TimelyEvent {
    fn from(v: OperatesEvent) -> TimelyEvent { TimelyEvent::Operates(v) }
}

impl From<ChannelsEvent> for TimelyEvent {
    fn from(v: ChannelsEvent) -> TimelyEvent { TimelyEvent::Channels(v) }
}

impl From<PushProgressEvent> for TimelyEvent {
    fn from(v: PushProgressEvent) -> TimelyEvent { TimelyEvent::PushProgress(v) }
}

impl From<MessagesEvent> for TimelyEvent {
    fn from(v: MessagesEvent) -> TimelyEvent { TimelyEvent::Messages(v) }
}

impl From<ScheduleEvent> for TimelyEvent {
    fn from(v: ScheduleEvent) -> TimelyEvent { TimelyEvent::Schedule(v) }
}

impl From<ShutdownEvent> for TimelyEvent {
    fn from(v: ShutdownEvent) -> TimelyEvent { TimelyEvent::Shutdown(v) }
}

impl From<ApplicationEvent> for TimelyEvent {
    fn from(v: ApplicationEvent) -> TimelyEvent { TimelyEvent::Application(v) }
}

impl From<GuardedMessageEvent> for TimelyEvent {
    fn from(v: GuardedMessageEvent) -> TimelyEvent { TimelyEvent::GuardedMessage(v) }
}

impl From<GuardedProgressEvent> for TimelyEvent {
    fn from(v: GuardedProgressEvent) -> TimelyEvent { TimelyEvent::GuardedProgress(v) }
}

impl From<CommChannelsEvent> for TimelyEvent {
    fn from(v: CommChannelsEvent) -> TimelyEvent { TimelyEvent::CommChannels(v) }
}

impl From<InputEvent> for TimelyEvent {
    fn from(v: InputEvent) -> TimelyEvent { TimelyEvent::Input(v) }
}

impl From<ParkEvent> for TimelyEvent {
    fn from(v: ParkEvent) -> TimelyEvent { TimelyEvent::Park(v) }
}