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
use atomic_option::AtomicOption;
use chrono::prelude::*;
use futures::prelude::*;
use protobuf::well_known_types::Timestamp;
use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
use std::sync::RwLock;
use std::thread;
use std::time::Duration;
use crate::protos::qni_api::*;
use std::sync::Arc;
#[derive(Debug, Fail)]
pub enum WaitError {
#[fail(display = "wait timeout")]
Timeout,
#[fail(display = "console exited")]
Exited,
#[fail(display = "request outdated")]
OutDated,
}
pub struct ConsoleWaitFuture {
ctx: Arc<ConsoleContext>,
expire: Option<DateTime<Utc>>,
tag: usize,
}
impl ConsoleWaitFuture {
pub fn new(ctx: Arc<ConsoleContext>, req: ProgramRequest) -> Self {
let expire = if req.get_INPUT().has_expire() {
let expire: &Timestamp = req.get_INPUT().get_expire();
Some(Utc.timestamp(expire.seconds, expire.nanos as u32))
} else {
None
};
let tag = ctx.set_req(req);
Self { ctx, expire, tag }
}
}
impl Future for ConsoleWaitFuture {
type Item = Box<ConsoleResponse>;
type Error = WaitError;
fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
if self.ctx.need_exit() {
Err(WaitError::Exited)
} else if self.ctx.is_outdated_tag(self.tag) {
Err(WaitError::OutDated)
} else {
if let Some(expire) = self.expire {
if Utc::now() >= expire {
return Err(WaitError::Timeout);
}
}
match self.ctx.response.take(Ordering::Acquire) {
Some(res) => Ok(Async::Ready(res)),
None => Ok(Async::NotReady),
}
}
}
}
pub struct ConsoleContext {
commands: RwLock<Vec<ProgramCommand>>,
exit_flag: AtomicBool,
request_tag: AtomicUsize,
request: RwLock<Option<ProgramRequest>>,
response: AtomicOption<ConsoleResponse>,
}
impl ConsoleContext {
pub fn new() -> Self {
Self {
commands: Default::default(),
exit_flag: AtomicBool::new(false),
request_tag: AtomicUsize::new(0),
response: AtomicOption::empty(),
request: RwLock::new(None),
}
}
pub fn need_exit(&self) -> bool {
self.exit_flag.load(Ordering::Relaxed)
}
pub fn set_exit(&self) {
self.exit_flag.store(true, Ordering::Relaxed)
}
pub fn append_command(&self, command: ProgramCommand) {
self.commands.write().unwrap().push(command);
}
pub fn append_command_mut(&mut self, command: ProgramCommand) {
self.commands.get_mut().unwrap().push(command);
}
pub fn export_command(&self, from: usize) -> Vec<ProgramCommand> {
Vec::from(&self.commands.read().unwrap()[from..])
}
#[inline]
pub fn get_command_count(&self) -> usize {
self.commands.read().unwrap().len()
}
#[inline]
fn get_next_input_tag(&self) -> usize {
self.request_tag.fetch_add(1, Ordering::Relaxed)
}
#[inline]
pub fn get_cur_input_tag(&self) -> usize {
self.request_tag.load(Ordering::Relaxed)
}
pub fn on_recv_response(&self, res: ConsoleResponse) {
if !self.is_outdated_tag(res.get_tag() as usize) {
self.response.swap(Box::new(res), Ordering::Release);
}
}
fn set_req(&self, mut req: ProgramRequest) -> usize {
let tag = self.get_next_input_tag();
req.set_tag(tag as u32);
*self.request.write().unwrap() = Some(req);
tag
}
pub fn try_get_req(&self) -> Option<ProgramRequest> {
self.request.read().unwrap().as_ref().map(Clone::clone)
}
pub fn is_outdated_tag(&self, tag: usize) -> bool {
tag + 1 < self.get_cur_input_tag()
}
pub fn wait_console(&self, req: ProgramRequest) -> Result<Box<ConsoleResponse>, WaitError> {
let expire = if req.get_INPUT().has_expire() {
let expire: &Timestamp = req.get_INPUT().get_expire();
Some(Utc.timestamp(expire.seconds, expire.nanos as u32))
} else {
None
};
let tag = self.set_req(req);
let ret = loop {
if self.need_exit() {
break Err(WaitError::Exited);
}
let response = self.response.take(Ordering::Acquire);
if let Some(response) = response {
break Ok(response);
}
if let Some(expire) = expire {
if Utc::now() >= expire {
break Err(WaitError::Timeout);
}
}
if self.is_outdated_tag(tag) {
break Err(WaitError::Timeout);
}
thread::sleep(Duration::from_millis(100));
};
ret
}
pub fn wait_console_async(ctx: Arc<ConsoleContext>, req: ProgramRequest) -> ConsoleWaitFuture {
ConsoleWaitFuture::new(ctx, req)
}
}