aws_sdk_rds/operation/
remove_source_identifier_from_subscription.rs

1// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
2/// Orchestration and serialization glue logic for `RemoveSourceIdentifierFromSubscription`.
3#[derive(::std::clone::Clone, ::std::default::Default, ::std::fmt::Debug)]
4#[non_exhaustive]
5pub struct RemoveSourceIdentifierFromSubscription;
6impl RemoveSourceIdentifierFromSubscription {
7    /// Creates a new `RemoveSourceIdentifierFromSubscription`
8    pub fn new() -> Self {
9        Self
10    }
11    pub(crate) async fn orchestrate(
12        runtime_plugins: &::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins,
13        input: crate::operation::remove_source_identifier_from_subscription::RemoveSourceIdentifierFromSubscriptionInput,
14    ) -> ::std::result::Result<
15        crate::operation::remove_source_identifier_from_subscription::RemoveSourceIdentifierFromSubscriptionOutput,
16        ::aws_smithy_runtime_api::client::result::SdkError<
17            crate::operation::remove_source_identifier_from_subscription::RemoveSourceIdentifierFromSubscriptionError,
18            ::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
19        >,
20    > {
21        let map_err = |err: ::aws_smithy_runtime_api::client::result::SdkError<
22            ::aws_smithy_runtime_api::client::interceptors::context::Error,
23            ::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
24        >| {
25            err.map_service_error(|err| {
26                err.downcast::<crate::operation::remove_source_identifier_from_subscription::RemoveSourceIdentifierFromSubscriptionError>()
27                    .expect("correct error type")
28            })
29        };
30        let context = Self::orchestrate_with_stop_point(runtime_plugins, input, ::aws_smithy_runtime::client::orchestrator::StopPoint::None)
31            .await
32            .map_err(map_err)?;
33        let output = context.finalize().map_err(map_err)?;
34        ::std::result::Result::Ok(
35            output
36                .downcast::<crate::operation::remove_source_identifier_from_subscription::RemoveSourceIdentifierFromSubscriptionOutput>()
37                .expect("correct output type"),
38        )
39    }
40
41    pub(crate) async fn orchestrate_with_stop_point(
42        runtime_plugins: &::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins,
43        input: crate::operation::remove_source_identifier_from_subscription::RemoveSourceIdentifierFromSubscriptionInput,
44        stop_point: ::aws_smithy_runtime::client::orchestrator::StopPoint,
45    ) -> ::std::result::Result<
46        ::aws_smithy_runtime_api::client::interceptors::context::InterceptorContext,
47        ::aws_smithy_runtime_api::client::result::SdkError<
48            ::aws_smithy_runtime_api::client::interceptors::context::Error,
49            ::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
50        >,
51    > {
52        let input = ::aws_smithy_runtime_api::client::interceptors::context::Input::erase(input);
53        use ::tracing::Instrument;
54        ::aws_smithy_runtime::client::orchestrator::invoke_with_stop_point(
55            "RDS",
56            "RemoveSourceIdentifierFromSubscription",
57            input,
58            runtime_plugins,
59            stop_point,
60        )
61        // Create a parent span for the entire operation. Includes a random, internal-only,
62        // seven-digit ID for the operation orchestration so that it can be correlated in the logs.
63        .instrument(::tracing::debug_span!(
64            "RDS.RemoveSourceIdentifierFromSubscription",
65            "rpc.service" = "RDS",
66            "rpc.method" = "RemoveSourceIdentifierFromSubscription",
67            "sdk_invocation_id" = ::fastrand::u32(1_000_000..10_000_000),
68            "rpc.system" = "aws-api",
69        ))
70        .await
71    }
72
73    pub(crate) fn operation_runtime_plugins(
74        client_runtime_plugins: ::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins,
75        client_config: &crate::config::Config,
76        config_override: ::std::option::Option<crate::config::Builder>,
77    ) -> ::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins {
78        let mut runtime_plugins = client_runtime_plugins.with_operation_plugin(Self::new());
79
80        if let ::std::option::Option::Some(config_override) = config_override {
81            for plugin in config_override.runtime_plugins.iter().cloned() {
82                runtime_plugins = runtime_plugins.with_operation_plugin(plugin);
83            }
84            runtime_plugins = runtime_plugins.with_operation_plugin(crate::config::ConfigOverrideRuntimePlugin::new(
85                config_override,
86                client_config.config.clone(),
87                &client_config.runtime_components,
88            ));
89        }
90        runtime_plugins
91    }
92}
93impl ::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugin for RemoveSourceIdentifierFromSubscription {
94    fn config(&self) -> ::std::option::Option<::aws_smithy_types::config_bag::FrozenLayer> {
95        let mut cfg = ::aws_smithy_types::config_bag::Layer::new("RemoveSourceIdentifierFromSubscription");
96
97        cfg.store_put(::aws_smithy_runtime_api::client::ser_de::SharedRequestSerializer::new(
98            RemoveSourceIdentifierFromSubscriptionRequestSerializer,
99        ));
100        cfg.store_put(::aws_smithy_runtime_api::client::ser_de::SharedResponseDeserializer::new(
101            RemoveSourceIdentifierFromSubscriptionResponseDeserializer,
102        ));
103
104        cfg.store_put(::aws_smithy_runtime_api::client::auth::AuthSchemeOptionResolverParams::new(
105            crate::config::auth::Params::builder()
106                .operation_name("RemoveSourceIdentifierFromSubscription")
107                .build()
108                .expect("required fields set"),
109        ));
110
111        cfg.store_put(::aws_smithy_runtime_api::client::orchestrator::Metadata::new(
112            "RemoveSourceIdentifierFromSubscription",
113            "RDS",
114        ));
115        let mut signing_options = ::aws_runtime::auth::SigningOptions::default();
116        signing_options.double_uri_encode = true;
117        signing_options.content_sha256_header = false;
118        signing_options.normalize_uri_path = true;
119        signing_options.payload_override = None;
120
121        cfg.store_put(::aws_runtime::auth::SigV4OperationSigningConfig {
122            signing_options,
123            ..::std::default::Default::default()
124        });
125
126        ::std::option::Option::Some(cfg.freeze())
127    }
128
129    fn runtime_components(
130        &self,
131        _: &::aws_smithy_runtime_api::client::runtime_components::RuntimeComponentsBuilder,
132    ) -> ::std::borrow::Cow<'_, ::aws_smithy_runtime_api::client::runtime_components::RuntimeComponentsBuilder> {
133        #[allow(unused_mut)]
134        let mut rcb = ::aws_smithy_runtime_api::client::runtime_components::RuntimeComponentsBuilder::new("RemoveSourceIdentifierFromSubscription")
135            .with_interceptor(::aws_smithy_runtime_api::client::interceptors::SharedInterceptor::permanent(
136                RemoveSourceIdentifierFromSubscriptionTelemetryInputCaptureInterceptor,
137            ))
138            .with_interceptor(::aws_smithy_runtime_api::client::interceptors::SharedInterceptor::permanent(
139                ::aws_smithy_runtime::client::stalled_stream_protection::StalledStreamProtectionInterceptor::default(),
140            ))
141            .with_interceptor(::aws_smithy_runtime_api::client::interceptors::SharedInterceptor::permanent(
142                RemoveSourceIdentifierFromSubscriptionEndpointParamsInterceptor,
143            ))
144            .with_retry_classifier(::aws_smithy_runtime::client::retries::classifiers::TransientErrorClassifier::<
145                crate::operation::remove_source_identifier_from_subscription::RemoveSourceIdentifierFromSubscriptionError,
146            >::new())
147            .with_retry_classifier(::aws_smithy_runtime::client::retries::classifiers::ModeledAsRetryableClassifier::<
148                crate::operation::remove_source_identifier_from_subscription::RemoveSourceIdentifierFromSubscriptionError,
149            >::new())
150            .with_retry_classifier(::aws_runtime::retries::classifiers::AwsErrorCodeClassifier::<
151                crate::operation::remove_source_identifier_from_subscription::RemoveSourceIdentifierFromSubscriptionError,
152            >::new())
153            .with_retry_classifier(::aws_runtime::service_clock_skew::ServiceClockSkewClassifier::<
154                crate::operation::remove_source_identifier_from_subscription::RemoveSourceIdentifierFromSubscriptionError,
155            >::new());
156
157        ::std::borrow::Cow::Owned(rcb)
158    }
159}
160
161#[derive(Debug)]
162struct RemoveSourceIdentifierFromSubscriptionTelemetryInputCaptureInterceptor;
163
164#[::aws_smithy_runtime_api::client::interceptors::dyn_dispatch_hint]
165impl ::aws_smithy_runtime_api::client::interceptors::Intercept for RemoveSourceIdentifierFromSubscriptionTelemetryInputCaptureInterceptor {
166    fn name(&self) -> &'static str {
167        "RemoveSourceIdentifierFromSubscriptionTelemetryInputCaptureInterceptor"
168    }
169
170    fn read_before_execution(
171        &self,
172        context: &::aws_smithy_runtime_api::client::interceptors::context::BeforeSerializationInterceptorContextRef<
173            '_,
174            ::aws_smithy_runtime_api::client::interceptors::context::Input,
175            ::aws_smithy_runtime_api::client::interceptors::context::Output,
176            ::aws_smithy_runtime_api::client::interceptors::context::Error,
177        >,
178        cfg: &mut ::aws_smithy_types::config_bag::ConfigBag,
179    ) -> ::std::result::Result<(), ::aws_smithy_runtime_api::box_error::BoxError> {
180        // Nothing to do unless the customer opted in by naming members to record.
181        let ::std::option::Option::Some(requested) = cfg
182            .load::<::aws_smithy_types::telemetry::RequestedTelemetryAttributes>()
183            .filter(|r| !r.is_empty())
184        else {
185            return ::std::result::Result::Ok(());
186        };
187
188        let ::std::option::Option::Some(input) = context.input().downcast_ref::<RemoveSourceIdentifierFromSubscriptionInput>() else {
189            // A mismatched input is not this interceptor's concern; skip quietly.
190            return ::std::result::Result::Ok(());
191        };
192
193        let mut captured = ::aws_smithy_types::telemetry::CapturedTelemetryAttributes::default();
194        if requested.should_capture("SubscriptionName") {
195            if let ::std::option::Option::Some(value) = input.subscription_name.as_deref() {
196                captured.insert("SubscriptionName", value);
197            }
198        }
199        if requested.should_capture("SourceIdentifier") {
200            if let ::std::option::Option::Some(value) = input.source_identifier.as_deref() {
201                captured.insert("SourceIdentifier", value);
202            }
203        }
204
205        cfg.interceptor_state().store_put(captured);
206        ::std::result::Result::Ok(())
207    }
208}
209#[derive(Debug)]
210struct RemoveSourceIdentifierFromSubscriptionResponseDeserializer;
211impl ::aws_smithy_runtime_api::client::ser_de::DeserializeResponse for RemoveSourceIdentifierFromSubscriptionResponseDeserializer {
212    fn deserialize_nonstreaming_with_config(
213        &self,
214        response: &::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
215        _cfg: &::aws_smithy_types::config_bag::ConfigBag,
216    ) -> ::aws_smithy_runtime_api::client::interceptors::context::OutputOrError {
217        let (success, status) = (response.status().is_success(), response.status().as_u16());
218        let headers = response.headers();
219        let body = response.body().bytes().expect("body loaded");
220        #[allow(unused_mut)]
221        let mut force_error = false;
222        ::tracing::debug!(request_id = ?::aws_types::request_id::RequestId::request_id(response));
223        let parse_result = if !success && status != 200 || force_error {
224            crate::protocol_serde::shape_remove_source_identifier_from_subscription::de_remove_source_identifier_from_subscription_http_error(
225                status, headers, body,
226            )
227        } else {
228            crate::protocol_serde::shape_remove_source_identifier_from_subscription::de_remove_source_identifier_from_subscription_http_response(
229                status, headers, body,
230            )
231        };
232        crate::protocol_serde::type_erase_result(parse_result)
233    }
234}
235#[derive(Debug)]
236struct RemoveSourceIdentifierFromSubscriptionRequestSerializer;
237impl ::aws_smithy_runtime_api::client::ser_de::SerializeRequest for RemoveSourceIdentifierFromSubscriptionRequestSerializer {
238    #[allow(unused_mut, clippy::let_and_return, clippy::needless_borrow, clippy::useless_conversion)]
239    fn serialize_input(
240        &self,
241        input: ::aws_smithy_runtime_api::client::interceptors::context::Input,
242        _cfg: &mut ::aws_smithy_types::config_bag::ConfigBag,
243    ) -> ::std::result::Result<::aws_smithy_runtime_api::client::orchestrator::HttpRequest, ::aws_smithy_runtime_api::box_error::BoxError> {
244        let input = input
245            .downcast::<crate::operation::remove_source_identifier_from_subscription::RemoveSourceIdentifierFromSubscriptionInput>()
246            .expect("correct type");
247        let _header_serialization_settings = _cfg
248            .load::<crate::serialization_settings::HeaderSerializationSettings>()
249            .cloned()
250            .unwrap_or_default();
251        let mut request_builder = {
252            #[allow(clippy::uninlined_format_args)]
253            fn uri_base(
254                _input: &crate::operation::remove_source_identifier_from_subscription::RemoveSourceIdentifierFromSubscriptionInput,
255                output: &mut ::std::string::String,
256            ) -> ::std::result::Result<(), ::aws_smithy_types::error::operation::BuildError> {
257                use ::std::fmt::Write as _;
258                ::std::write!(output, "/").expect("formatting should succeed");
259                ::std::result::Result::Ok(())
260            }
261            #[allow(clippy::unnecessary_wraps)]
262            fn update_http_builder(
263                input: &crate::operation::remove_source_identifier_from_subscription::RemoveSourceIdentifierFromSubscriptionInput,
264                builder: ::http_1x::request::Builder,
265            ) -> ::std::result::Result<::http_1x::request::Builder, ::aws_smithy_types::error::operation::BuildError> {
266                let mut uri = ::std::string::String::new();
267                uri_base(input, &mut uri)?;
268                ::std::result::Result::Ok(builder.method("POST").uri(uri))
269            }
270            let mut builder = update_http_builder(&input, ::http_1x::request::Builder::new())?;
271            builder =
272                _header_serialization_settings.set_default_header(builder, ::http_1x::header::CONTENT_TYPE, "application/x-www-form-urlencoded");
273            builder
274        };
275        let body = ::aws_smithy_types::body::SdkBody::from(crate::protocol_serde::shape_remove_source_identifier_from_subscription_input::ser_remove_source_identifier_from_subscription_input_input_input(&input)?);
276        if let Some(content_length) = body.content_length() {
277            let content_length = content_length.to_string();
278            request_builder = _header_serialization_settings.set_default_header(request_builder, ::http_1x::header::CONTENT_LENGTH, &content_length);
279        }
280        ::std::result::Result::Ok(request_builder.body(body).expect("valid request").try_into().unwrap())
281    }
282}
283#[derive(Debug)]
284struct RemoveSourceIdentifierFromSubscriptionEndpointParamsInterceptor;
285
286#[::aws_smithy_runtime_api::client::interceptors::dyn_dispatch_hint]
287impl ::aws_smithy_runtime_api::client::interceptors::Intercept for RemoveSourceIdentifierFromSubscriptionEndpointParamsInterceptor {
288    fn name(&self) -> &'static str {
289        "RemoveSourceIdentifierFromSubscriptionEndpointParamsInterceptor"
290    }
291
292    fn read_before_execution(
293        &self,
294        context: &::aws_smithy_runtime_api::client::interceptors::context::BeforeSerializationInterceptorContextRef<
295            '_,
296            ::aws_smithy_runtime_api::client::interceptors::context::Input,
297            ::aws_smithy_runtime_api::client::interceptors::context::Output,
298            ::aws_smithy_runtime_api::client::interceptors::context::Error,
299        >,
300        cfg: &mut ::aws_smithy_types::config_bag::ConfigBag,
301    ) -> ::std::result::Result<(), ::aws_smithy_runtime_api::box_error::BoxError> {
302        let _input = context
303            .input()
304            .downcast_ref::<RemoveSourceIdentifierFromSubscriptionInput>()
305            .ok_or("failed to downcast to RemoveSourceIdentifierFromSubscriptionInput")?;
306
307        let params = crate::config::endpoint::Params::builder()
308            .set_region(cfg.load::<::aws_types::region::Region>().map(|r| r.as_ref().to_owned()))
309            .set_use_dual_stack(cfg.load::<::aws_types::endpoint_config::UseDualStack>().map(|ty| ty.0))
310            .set_use_fips(cfg.load::<::aws_types::endpoint_config::UseFips>().map(|ty| ty.0))
311            .set_endpoint(cfg.load::<::aws_types::endpoint_config::EndpointUrl>().map(|ty| ty.0.clone()))
312            .build()
313            .map_err(|err| {
314                ::aws_smithy_runtime_api::client::interceptors::error::ContextAttachedError::new("endpoint params could not be built", err)
315            })?;
316        cfg.interceptor_state()
317            .store_put(::aws_smithy_runtime_api::client::endpoint::EndpointResolverParams::new(params));
318        ::std::result::Result::Ok(())
319    }
320}
321
322// The get_* functions below are generated from JMESPath expressions in the
323// operationContextParams trait. They target the operation's input shape.
324
325/// Error type for the `RemoveSourceIdentifierFromSubscriptionError` operation.
326#[non_exhaustive]
327#[derive(::std::fmt::Debug)]
328pub enum RemoveSourceIdentifierFromSubscriptionError {
329    /// <p>The requested source could not be found.</p>
330    SourceNotFoundFault(crate::types::error::SourceNotFoundFault),
331    /// <p>The subscription name does not exist.</p>
332    SubscriptionNotFoundFault(crate::types::error::SubscriptionNotFoundFault),
333    /// An unexpected error occurred (e.g., invalid JSON returned by the service or an unknown error code).
334    #[deprecated(note = "Matching `Unhandled` directly is not forwards compatible. Instead, match using a \
335    variable wildcard pattern and check `.code()`:
336     \
337    &nbsp;&nbsp;&nbsp;`err if err.code() == Some(\"SpecificExceptionCode\") => { /* handle the error */ }`
338     \
339    See [`ProvideErrorMetadata`](#impl-ProvideErrorMetadata-for-RemoveSourceIdentifierFromSubscriptionError) for what information is available for the error.")]
340    Unhandled(crate::error::sealed_unhandled::Unhandled),
341}
342impl RemoveSourceIdentifierFromSubscriptionError {
343    /// Creates the `RemoveSourceIdentifierFromSubscriptionError::Unhandled` variant from any error type.
344    pub fn unhandled(
345        err: impl ::std::convert::Into<::std::boxed::Box<dyn ::std::error::Error + ::std::marker::Send + ::std::marker::Sync + 'static>>,
346    ) -> Self {
347        Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
348            source: err.into(),
349            meta: ::std::default::Default::default(),
350        })
351    }
352
353    /// Creates the `RemoveSourceIdentifierFromSubscriptionError::Unhandled` variant from an [`ErrorMetadata`](::aws_smithy_types::error::ErrorMetadata).
354    pub fn generic(err: ::aws_smithy_types::error::ErrorMetadata) -> Self {
355        Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
356            source: err.clone().into(),
357            meta: err,
358        })
359    }
360    ///
361    /// Returns error metadata, which includes the error code, message,
362    /// request ID, and potentially additional information.
363    ///
364    pub fn meta(&self) -> &::aws_smithy_types::error::ErrorMetadata {
365        match self {
366            Self::SourceNotFoundFault(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
367            Self::SubscriptionNotFoundFault(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
368            Self::Unhandled(e) => &e.meta,
369        }
370    }
371    /// Returns `true` if the error kind is `RemoveSourceIdentifierFromSubscriptionError::SourceNotFoundFault`.
372    pub fn is_source_not_found_fault(&self) -> bool {
373        matches!(self, Self::SourceNotFoundFault(_))
374    }
375    /// Returns `true` if the error kind is `RemoveSourceIdentifierFromSubscriptionError::SubscriptionNotFoundFault`.
376    pub fn is_subscription_not_found_fault(&self) -> bool {
377        matches!(self, Self::SubscriptionNotFoundFault(_))
378    }
379}
380impl ::std::error::Error for RemoveSourceIdentifierFromSubscriptionError {
381    fn source(&self) -> ::std::option::Option<&(dyn ::std::error::Error + 'static)> {
382        match self {
383            Self::SourceNotFoundFault(_inner) => ::std::option::Option::Some(_inner),
384            Self::SubscriptionNotFoundFault(_inner) => ::std::option::Option::Some(_inner),
385            Self::Unhandled(_inner) => ::std::option::Option::Some(&*_inner.source),
386        }
387    }
388}
389impl ::std::fmt::Display for RemoveSourceIdentifierFromSubscriptionError {
390    fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result {
391        match self {
392            Self::SourceNotFoundFault(_inner) => _inner.fmt(f),
393            Self::SubscriptionNotFoundFault(_inner) => _inner.fmt(f),
394            Self::Unhandled(_inner) => {
395                if let ::std::option::Option::Some(code) = ::aws_smithy_types::error::metadata::ProvideErrorMetadata::code(self) {
396                    write!(f, "unhandled error ({code})")
397                } else {
398                    f.write_str("unhandled error")
399                }
400            }
401        }
402    }
403}
404impl ::aws_smithy_types::retry::ProvideErrorKind for RemoveSourceIdentifierFromSubscriptionError {
405    fn code(&self) -> ::std::option::Option<&str> {
406        ::aws_smithy_types::error::metadata::ProvideErrorMetadata::code(self)
407    }
408    fn retryable_error_kind(&self) -> ::std::option::Option<::aws_smithy_types::retry::ErrorKind> {
409        ::std::option::Option::None
410    }
411}
412impl ::aws_smithy_types::error::metadata::ProvideErrorMetadata for RemoveSourceIdentifierFromSubscriptionError {
413    fn meta(&self) -> &::aws_smithy_types::error::ErrorMetadata {
414        match self {
415            Self::SourceNotFoundFault(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
416            Self::SubscriptionNotFoundFault(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
417            Self::Unhandled(_inner) => &_inner.meta,
418        }
419    }
420}
421impl ::aws_smithy_runtime_api::client::result::CreateUnhandledError for RemoveSourceIdentifierFromSubscriptionError {
422    fn create_unhandled_error(
423        source: ::std::boxed::Box<dyn ::std::error::Error + ::std::marker::Send + ::std::marker::Sync + 'static>,
424        meta: ::std::option::Option<::aws_smithy_types::error::ErrorMetadata>,
425    ) -> Self {
426        Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
427            source,
428            meta: meta.unwrap_or_default(),
429        })
430    }
431}
432impl ::aws_types::request_id::RequestId
433    for crate::operation::remove_source_identifier_from_subscription::RemoveSourceIdentifierFromSubscriptionError
434{
435    fn request_id(&self) -> Option<&str> {
436        self.meta().request_id()
437    }
438}
439
440pub use crate::operation::remove_source_identifier_from_subscription::_remove_source_identifier_from_subscription_input::RemoveSourceIdentifierFromSubscriptionInput;
441
442pub use crate::operation::remove_source_identifier_from_subscription::_remove_source_identifier_from_subscription_output::RemoveSourceIdentifierFromSubscriptionOutput;
443
444mod _remove_source_identifier_from_subscription_input;
445
446mod _remove_source_identifier_from_subscription_output;
447
448/// Builders
449pub mod builders;
aws_sdk_rds/operation/remove_source_identifier_from_subscription.rs

aws_sdk_rds/operation/
remove_source_identifier_from_subscription.rs
