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
use tokio::time::Duration;
use crate::UpstreamError;
use smallvec::SmallVec;
pub(crate) enum InnerCommitPolicy {
Noop,
Immediate(ImmediateCommitWaiter),
Within(Duration),
}
#[derive(Clone, Copy)]
pub enum DefaultCommitPolicy {
Immediate,
Within(Duration),
}
pub(super) enum CommitPolicy {
Default,
Noop,
Immediate,
Within(Duration),
}
pub(super) enum CommitPolicyNoDefault {
Noop,
Immediate,
Within(Duration),
}
impl CommitPolicy {
pub(super) fn apply_default(
self,
default_commit_policy: DefaultCommitPolicy,
) -> CommitPolicyNoDefault {
match self {
CommitPolicy::Default => default_commit_policy.into(),
CommitPolicy::Noop => CommitPolicyNoDefault::Noop,
CommitPolicy::Within(duration) => CommitPolicyNoDefault::Within(duration),
CommitPolicy::Immediate => CommitPolicyNoDefault::Immediate,
}
}
}
pub struct Commit<Data>(CommitPolicy, Data);
impl<Data> Commit<Data> {
pub fn immediately(data: Data) -> Self {
Self(CommitPolicy::Immediate, data)
}
pub fn default(data: Data) -> Self {
Self(CommitPolicy::Default, data)
}
pub fn within(data: Data, duration: Duration) -> Self {
Self(CommitPolicy::Within(duration), data)
}
pub unsafe fn noop(data: Data) -> Self {
Self(CommitPolicy::Noop, data)
}
pub(super) fn into_inner(self) -> (CommitPolicy, Data) {
(self.0, self.1)
}
}
impl Into<CommitPolicyNoDefault> for DefaultCommitPolicy {
fn into(self) -> CommitPolicyNoDefault {
match self {
DefaultCommitPolicy::Within(duration) => CommitPolicyNoDefault::Within(duration),
DefaultCommitPolicy::Immediate => CommitPolicyNoDefault::Immediate,
}
}
}
pub(super) type ImmediateCommitWaiter = Box<dyn FnOnce(Result<(), UpstreamError>) + Send + 'static>;
pub(super) type ImmediateCommitWaiters = SmallVec<[ImmediateCommitWaiter; 1]>;
pub(super) enum AccumulatedCommitPolicy {
Noop,
Within(Duration),
Immediate(ImmediateCommitWaiters),
}
impl From<InnerCommitPolicy> for AccumulatedCommitPolicy {
fn from(commit_policy: InnerCommitPolicy) -> Self {
match commit_policy {
InnerCommitPolicy::Within(duration) => AccumulatedCommitPolicy::Within(duration),
InnerCommitPolicy::Immediate(callback) => callback.into(),
InnerCommitPolicy::Noop => AccumulatedCommitPolicy::Noop,
}
}
}
impl From<ImmediateCommitWaiter> for AccumulatedCommitPolicy {
fn from(waiter: ImmediateCommitWaiter) -> Self {
let mut vec = SmallVec::new();
vec.push(waiter);
AccumulatedCommitPolicy::Immediate(vec)
}
}
impl AccumulatedCommitPolicy {
pub(super) fn new() -> Self {
AccumulatedCommitPolicy::Noop
}
pub(super) fn did_mutate(&self) -> bool {
match self {
AccumulatedCommitPolicy::Noop => false,
AccumulatedCommitPolicy::Within(_) | AccumulatedCommitPolicy::Immediate(_) => true,
}
}
pub(super) fn accumulate(self, commit_policy: InnerCommitPolicy) -> Self {
match commit_policy {
InnerCommitPolicy::Within(duration) => self.accumulate_commit_within(duration),
InnerCommitPolicy::Immediate(waiter) => self.accumulate_commit_immediate(waiter),
InnerCommitPolicy::Noop => self,
}
}
fn accumulate_commit_within(self, duration: Duration) -> Self {
match self {
AccumulatedCommitPolicy::Noop => AccumulatedCommitPolicy::Within(duration),
AccumulatedCommitPolicy::Within(existing_duration) => {
AccumulatedCommitPolicy::Within(std::cmp::min(existing_duration, duration))
}
AccumulatedCommitPolicy::Immediate(_) => self,
}
}
fn accumulate_commit_immediate(self, waiter: ImmediateCommitWaiter) -> Self {
match self {
AccumulatedCommitPolicy::Noop | AccumulatedCommitPolicy::Within(_) => waiter.into(),
AccumulatedCommitPolicy::Immediate(mut waiters) => {
waiters.push(waiter);
AccumulatedCommitPolicy::Immediate(waiters)
}
}
}
}