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
use quote::quote_spanned;
use super::{
DelayType, OpInstGenerics, OperatorCategory, OperatorConstraints, OperatorInstance,
OperatorWriteOutput, Persistence, WriteContextArgs, RANGE_0, RANGE_1,
};
use crate::diagnostic::{Diagnostic, Level};
/// `persist_mut_keyed()` is similar to `persist_mut()` except that it also enables key-based deletions
/// `persist_mut()` expects an input of type [`PersistenceKeyed<T>`](https://docs.rs/hydroflow/latest/hydroflow/util/enum.PersistenceKeyed.html),
/// and it is this enumeration that enables the user to communicate deletion.
/// Deletions/persists happen in the order they are received in the stream.
/// For example, `[Persist(1), Delete(1), Persist(1)]` will result in a a single `1` value being stored.
///
/// ```hydroflow
/// use hydroflow::util::PersistenceKeyed;
///
/// source_iter([
/// PersistenceKeyed::Persist(0, 1),
/// PersistenceKeyed::Persist(1, 1),
/// PersistenceKeyed::Delete(1),
/// ])
/// -> persist_mut_keyed::<'static>()
/// -> assert_eq([(0, 1)]);
/// ```
pub const PERSIST_MUT_KEYED: OperatorConstraints = OperatorConstraints {
name: "persist_mut_keyed",
categories: &[OperatorCategory::Persistence],
hard_range_inn: RANGE_1,
soft_range_inn: RANGE_1,
hard_range_out: RANGE_1,
soft_range_out: RANGE_1,
num_args: 0,
persistence_args: RANGE_1,
type_args: RANGE_0,
is_external_input: false,
// If this is set to true, the state will need to be cleared using `#context.set_state_tick_hook`
// to prevent reading uncleared data if this subgraph doesn't run.
// https://github.com/hydro-project/hydroflow/issues/1298
// If `'tick` lifetimes are added.
has_singleton_output: false,
ports_inn: None,
ports_out: None,
input_delaytype_fn: |_| Some(DelayType::Stratum),
write_fn: |wc @ &WriteContextArgs {
root,
context,
hydroflow,
op_span,
ident,
inputs,
is_pull,
op_name,
op_inst:
OperatorInstance {
generics:
OpInstGenerics {
persistence_args, ..
},
..
},
..
},
diagnostics| {
assert!(is_pull);
if [Persistence::Static] != persistence_args[..] {
diagnostics.push(Diagnostic::spanned(
op_span,
Level::Error,
format!("{} only supports `'static`.", op_name),
));
}
let persistdata_ident = wc.make_ident("persistdata");
let vec_ident = wc.make_ident("persistvec");
let write_prologue = quote_spanned! {op_span=>
let #persistdata_ident = #hydroflow.add_state(::std::cell::RefCell::new(
#root::rustc_hash::FxHashMap::<_, #root::util::sparse_vec::SparseVec<_>>::default()
));
};
let write_iterator = {
let input = &inputs[0];
quote_spanned! {op_span=>
let mut #vec_ident = #context.state_ref(#persistdata_ident).borrow_mut();
let #ident = {
#[inline(always)]
fn check_iter<K, V>(iter: impl Iterator<Item = #root::util::PersistenceKeyed::<K, V>>) -> impl Iterator<Item = #root::util::PersistenceKeyed::<K, V>> {
iter
}
if context.is_first_run_this_tick() {
for item in check_iter(#input) {
match item {
#root::util::PersistenceKeyed::Persist(k, v) => {
#vec_ident.entry(k).or_default().push(v);
},
#root::util::PersistenceKeyed::Delete(k) => {
#vec_ident.remove(&k);
}
}
}
#[allow(clippy::clone_on_copy)]
Some(#vec_ident.iter()
.flat_map(|(k, v)| v.iter().map(move |v| (k.clone(), v.clone()))))
.into_iter()
.flatten()
} else {
None.into_iter().flatten()
}
};
}
};
let write_iterator_after = quote_spanned! {op_span=>
#context.schedule_subgraph(#context.current_subgraph(), false);
};
Ok(OperatorWriteOutput {
write_prologue,
write_iterator,
write_iterator_after,
})
},
};