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
use std::ffi::CStr;
use std::fmt;
use std::future::Future;
use std::marker::PhantomData;
use std::pin::Pin;
use anyhow::bail;
use anyhow::Result;
use futures::future::FutureExt;
use crate::serialize;
use crate::ApplicationException;
use crate::ContextStack;
use crate::Deserialize;
use crate::MessageType;
use crate::Protocol;
use crate::ProtocolEncodedFinal;
use crate::ProtocolReader;
use crate::ProtocolWriter;
use crate::RequestContext;
use crate::ResultInfo;
use crate::ResultType;
use crate::Serialize;
use crate::SerializedMessage;
pub fn enum_display(
variants_by_number: &[(&str, i32)],
formatter: &mut fmt::Formatter,
number: i32,
) -> fmt::Result {
match variants_by_number.binary_search_by_key(&number, |entry| entry.1) {
Ok(i) => formatter.write_str(variants_by_number[i].0),
Err(_) => write!(formatter, "{}", number),
}
}
pub fn enum_from_str(
variants_by_name: &[(&str, i32)],
value: &str,
type_name: &'static str,
) -> Result<i32> {
match variants_by_name.binary_search_by_key(&value, |entry| entry.0) {
Ok(i) => Ok(variants_by_name[i].1),
Err(_) => bail!("Unable to parse {} as {}", value, type_name),
}
}
pub fn type_name_of_val<T>(_: &T) -> &'static str {
std::any::type_name::<T>()
}
pub fn serialize_result_envelope<P, CTXT, RES>(
name: &str,
name_cstr: &<CTXT::ContextStack as ContextStack>::Name,
seqid: u32,
rctxt: &CTXT,
ctx_stack: &mut CTXT::ContextStack,
res: RES,
) -> anyhow::Result<ProtocolEncodedFinal<P>>
where
P: Protocol,
RES: ResultInfo + Serialize<P::Sizer> + Serialize<P::Serializer>,
CTXT: RequestContext<Name = CStr>,
{
let res_type = res.result_type();
if matches!(res_type, ResultType::Error | ResultType::Exception) {
assert_eq!(res.exn_is_declared(), res_type == ResultType::Error);
rctxt.set_user_exception_header(res.exn_name(), &res.exn_value())?;
}
ctx_stack.pre_write()?;
let envelope = serialize!(P, |p| {
p.write_message_begin(name, res_type.message_type(), seqid);
res.write(p);
p.write_message_end();
});
ctx_stack.on_write_data(&SerializedMessage {
protocol: P::PROTOCOL_ID,
method_name: name_cstr,
buffer: PhantomData,
})?;
ctx_stack.post_write(0)?;
Ok(envelope)
}
pub fn serialize_stream_item<P, RES>(res: RES) -> anyhow::Result<ProtocolEncodedFinal<P>>
where
P: Protocol,
RES: ResultInfo + Serialize<P::Sizer> + Serialize<P::Serializer>,
{
Ok(serialize!(P, |p| {
res.write(p);
}))
}
pub fn serialize_request_envelope<P, ARGS>(
name: &str,
args: &ARGS,
) -> anyhow::Result<ProtocolEncodedFinal<P>>
where
P: Protocol,
ARGS: Serialize<P::Sizer> + Serialize<P::Serializer>,
{
let envelope = serialize!(P, |p| {
p.write_message_begin(name, MessageType::Call, 0);
args.write(p);
p.write_message_end();
});
Ok(envelope)
}
pub fn deserialize_response_envelope<P, T>(
de: &mut P::Deserializer,
) -> anyhow::Result<Result<T, ApplicationException>>
where
P: Protocol,
T: Deserialize<P::Deserializer>,
{
let (_, message_type, _) = de.read_message_begin(|_| ())?;
let res = match message_type {
MessageType::Reply => Ok(T::read(de)?),
MessageType::Exception => Err(ApplicationException::read(de)?),
MessageType::Call | MessageType::Oneway | MessageType::InvalidMessageType => {
bail!("Unwanted message type `{:?}`", message_type)
}
};
de.read_message_end()?;
Ok(res)
}
pub trait Spawner: 'static {
fn spawn<F, R>(func: F) -> Pin<Box<dyn Future<Output = R> + Send>>
where
F: FnOnce() -> R + Send + 'static,
R: Send + 'static;
}
pub struct NoopSpawner;
impl Spawner for NoopSpawner {
#[inline]
fn spawn<F, R>(func: F) -> Pin<Box<dyn Future<Output = R> + Send>>
where
F: FnOnce() -> R + Send + 'static,
R: Send + 'static,
{
async { func() }.boxed()
}
}
pub async fn async_deserialize_response_envelope<P, T, S>(
de: P::Deserializer,
) -> anyhow::Result<(Result<T, ApplicationException>, P::Deserializer)>
where
P: Protocol,
P::Deserializer: Send,
T: Deserialize<P::Deserializer> + Send + 'static,
S: Spawner,
{
S::spawn(move || {
let mut de = de;
let res = deserialize_response_envelope::<P, T>(&mut de);
res.map(|res| (res, de))
})
.await
}