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
//! Tools for Dependency Injection
use super::{App, error::Error};
pub use {
self::dc::Dc,
volga_di::{Container, ContainerBuilder, GenericFactory, Inject},
};
pub mod dc;
/// Dependency injection errors
pub mod error {
pub use volga_di::error::Error;
}
/// Specifies extractors to read data from a borrowed DI container
pub trait FromContainer: Sized {
/// Extracts data from DI container
fn from_container(container: &Container) -> Result<Self, Error>;
}
impl FromContainer for () {
#[inline]
fn from_container(_: &Container) -> Result<Self, Error> {
Ok(())
}
}
impl From<error::Error> for Error {
#[inline]
fn from(err: error::Error) -> Self {
Error::server_error(err.to_string())
}
}
/// DI specific impl for [`App`]
impl App {
/// Registers singleton service
///
/// # Example
/// ```no_run
/// use volga::App;
///
/// #[derive(Default, Clone)]
/// struct Singleton;
///
/// let mut app = App::new();
/// let singleton = Singleton::default();
/// app.add_singleton(singleton);
/// ```
pub fn add_singleton<T: Send + Sync + 'static>(&mut self, instance: T) -> &mut Self {
self.container.register_singleton(instance);
self
}
/// Registers scoped service
///
/// # Example
/// ```no_run
/// use volga::{App, di::{Container, Inject, error::Error}};
///
/// #[derive(Clone)]
/// struct ScopedService;
///
/// impl Inject for ScopedService {
/// fn inject(_: &Container) -> Result<Self, Error> {
/// Ok(Self)
/// }
/// }
///
/// let mut app = App::new();
/// app.add_scoped::<ScopedService>();
/// ```
pub fn add_scoped<T: Inject + 'static>(&mut self) -> &mut Self {
self.container.register_scoped::<T>();
self
}
/// Registers scoped service that required to be resolved via factory
///
/// > **Note:** Provided factory function will be called once per scope
/// > and the result will be available and reused per this scope lifetime.
///
/// # Example
/// ```no_run
/// use volga::App;
///
/// #[derive(Clone)]
/// struct ScopedService;
///
/// impl ScopedService {
/// fn new() -> Self {
/// ScopedService
/// }
/// }
///
/// let mut app = App::new();
/// app.add_scoped_factory(|| ScopedService::new());
/// ```
pub fn add_scoped_factory<T, F, Args>(&mut self, factory: F) -> &mut Self
where
T: Send + Sync + 'static,
F: GenericFactory<Args, Output = T>,
Args: Inject,
{
self.container.register_scoped_factory(factory);
self
}
/// Registers scoped service that required to be resolved as [`Default`]
///
/// > **Note:** the [`Default::default`] method will be called once per scope
/// > and the result will be available and reused per this scope lifetime.
///
/// # Example
/// ```no_run
/// use volga::App;
///
/// #[derive(Default, Clone)]
/// struct ScopedService;
///
/// let mut app = App::new();
/// app.add_scoped_default::<ScopedService>();
/// ```
pub fn add_scoped_default<T>(&mut self) -> &mut Self
where
T: Default + Send + Sync + 'static,
{
self.container.register_scoped_default::<T>();
self
}
/// Registers transient service
///
/// # Example
/// ```no_run
/// use volga::{App, di::{Container, Inject, error::Error}};
///
/// #[derive(Clone)]
/// struct TransientService;
///
/// impl Inject for TransientService {
/// fn inject(_: &Container) -> Result<Self, Error> {
/// Ok(Self)
/// }
/// }
///
/// let mut app = App::new();
/// app.add_transient::<TransientService>();
/// ```
pub fn add_transient<T: Inject + 'static>(&mut self) -> &mut Self {
self.container.register_transient::<T>();
self
}
/// Registers transient service that required to be resolved via factory
///
/// > **Note:** Provided factory function will be called
/// > every time once this service requested.
///
/// # Example
/// ```no_run
/// use volga::App;
///
/// #[derive(Clone)]
/// struct TransientService;
///
/// impl TransientService {
/// fn new() -> Self {
/// TransientService
/// }
/// }
///
/// let mut app = App::new();
/// app.add_transient_factory(|| TransientService::new());
/// ```
pub fn add_transient_factory<T, F, Args>(&mut self, factory: F) -> &mut Self
where
T: Send + Sync + 'static,
F: GenericFactory<Args, Output = T>,
Args: Inject,
{
self.container.register_transient_factory(factory);
self
}
/// Registers transient service that required to be resolved as [`Default`]
///
/// > **Note:** the [`Default::default`] method will be called
/// > every time once this service requested.
///
/// # Example
/// ```no_run
/// use volga::App;
///
/// #[derive(Default, Clone)]
/// struct TransientService;
///
/// let mut app = App::new();
/// app.add_transient_default::<TransientService>();
/// ```
pub fn add_transient_default<T>(&mut self) -> &mut Self
where
T: Default + Send + Sync + 'static,
{
self.container.register_transient_default::<T>();
self
}
}
#[cfg(test)]
mod tests {
use super::App;
use volga_di::{Container, Inject};
#[derive(Default)]
struct TestDependency;
impl Inject for TestDependency {
fn inject(_: &Container) -> Result<Self, volga_di::error::Error> {
Ok(TestDependency)
}
}
#[test]
fn it_adds_singleton() {
let mut app = App::new();
app.add_singleton(TestDependency);
let container = app.container.build();
let dep = container.resolve_shared::<TestDependency>();
assert!(dep.is_ok());
}
#[test]
fn it_adds_scoped() {
let mut app = App::new();
app.add_scoped::<TestDependency>();
let container = app.container.build();
let dep = container.resolve_shared::<TestDependency>();
assert!(dep.is_ok());
}
#[test]
fn it_adds_scoped_factory() {
let mut app = App::new();
app.add_scoped_factory(|| TestDependency);
let container = app.container.build();
let dep = container.resolve_shared::<TestDependency>();
assert!(dep.is_ok());
}
#[test]
fn it_adds_scoped_default() {
let mut app = App::new();
app.add_scoped_default::<TestDependency>();
let container = app.container.build();
let dep = container.resolve_shared::<TestDependency>();
assert!(dep.is_ok());
}
#[test]
fn it_adds_transient() {
let mut app = App::new();
app.add_transient::<TestDependency>();
let container = app.container.build();
let dep = container.resolve_shared::<TestDependency>();
assert!(dep.is_ok());
}
#[test]
fn it_adds_transient_factory() {
let mut app = App::new();
app.add_transient_factory(|| TestDependency);
let container = app.container.build();
let dep = container.resolve_shared::<TestDependency>();
assert!(dep.is_ok());
}
#[test]
fn it_adds_transient_default() {
let mut app = App::new();
app.add_transient_default::<TestDependency>();
let container = app.container.build();
let dep = container.resolve_shared::<TestDependency>();
assert!(dep.is_ok());
}
}