aws_sdk_eks/operation/
update_cluster_config.rs

1// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
2/// Orchestration and serialization glue logic for `UpdateClusterConfig`.
3#[derive(::std::clone::Clone, ::std::default::Default, ::std::fmt::Debug)]
4#[non_exhaustive]
5pub struct UpdateClusterConfig;
6impl UpdateClusterConfig {
7    /// Creates a new `UpdateClusterConfig`
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::update_cluster_config::UpdateClusterConfigInput,
14    ) -> ::std::result::Result<
15        crate::operation::update_cluster_config::UpdateClusterConfigOutput,
16        ::aws_smithy_runtime_api::client::result::SdkError<
17            crate::operation::update_cluster_config::UpdateClusterConfigError,
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::update_cluster_config::UpdateClusterConfigError>()
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::update_cluster_config::UpdateClusterConfigOutput>()
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::update_cluster_config::UpdateClusterConfigInput,
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("EKS", "UpdateClusterConfig", input, runtime_plugins, stop_point)
55            // Create a parent span for the entire operation. Includes a random, internal-only,
56            // seven-digit ID for the operation orchestration so that it can be correlated in the logs.
57            .instrument(::tracing::debug_span!(
58                "EKS.UpdateClusterConfig",
59                "rpc.service" = "EKS",
60                "rpc.method" = "UpdateClusterConfig",
61                "sdk_invocation_id" = ::fastrand::u32(1_000_000..10_000_000),
62                "rpc.system" = "aws-api",
63            ))
64            .await
65    }
66
67    pub(crate) fn operation_runtime_plugins(
68        client_runtime_plugins: ::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins,
69        client_config: &crate::config::Config,
70        config_override: ::std::option::Option<crate::config::Builder>,
71    ) -> ::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins {
72        let mut runtime_plugins = client_runtime_plugins.with_operation_plugin(Self::new());
73        runtime_plugins = runtime_plugins.with_operation_plugin(crate::client_idempotency_token::IdempotencyTokenRuntimePlugin::new(
74            |token_provider, input| {
75                let input: &mut crate::operation::update_cluster_config::UpdateClusterConfigInput = input.downcast_mut().expect("correct type");
76                if input.client_request_token.is_none() {
77                    input.client_request_token = ::std::option::Option::Some(token_provider.make_idempotency_token());
78                }
79            },
80        ));
81        if let ::std::option::Option::Some(config_override) = config_override {
82            for plugin in config_override.runtime_plugins.iter().cloned() {
83                runtime_plugins = runtime_plugins.with_operation_plugin(plugin);
84            }
85            runtime_plugins = runtime_plugins.with_operation_plugin(crate::config::ConfigOverrideRuntimePlugin::new(
86                config_override,
87                client_config.config.clone(),
88                &client_config.runtime_components,
89            ));
90        }
91        runtime_plugins
92    }
93}
94impl ::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugin for UpdateClusterConfig {
95    fn config(&self) -> ::std::option::Option<::aws_smithy_types::config_bag::FrozenLayer> {
96        let mut cfg = ::aws_smithy_types::config_bag::Layer::new("UpdateClusterConfig");
97
98        cfg.store_put(::aws_smithy_runtime_api::client::ser_de::SharedRequestSerializer::new(
99            UpdateClusterConfigRequestSerializer,
100        ));
101        cfg.store_put(::aws_smithy_runtime_api::client::ser_de::SharedResponseDeserializer::new(
102            UpdateClusterConfigResponseDeserializer,
103        ));
104
105        cfg.store_put(::aws_smithy_runtime_api::client::auth::AuthSchemeOptionResolverParams::new(
106            crate::config::auth::Params::builder()
107                .operation_name("UpdateClusterConfig")
108                .build()
109                .expect("required fields set"),
110        ));
111
112        cfg.store_put(::aws_smithy_runtime_api::client::orchestrator::Metadata::new(
113            "UpdateClusterConfig",
114            "EKS",
115        ));
116        let mut signing_options = ::aws_runtime::auth::SigningOptions::default();
117        signing_options.double_uri_encode = true;
118        signing_options.content_sha256_header = false;
119        signing_options.normalize_uri_path = true;
120        signing_options.payload_override = None;
121
122        cfg.store_put(::aws_runtime::auth::SigV4OperationSigningConfig {
123            signing_options,
124            ..::std::default::Default::default()
125        });
126
127        ::std::option::Option::Some(cfg.freeze())
128    }
129
130    fn runtime_components(
131        &self,
132        _: &::aws_smithy_runtime_api::client::runtime_components::RuntimeComponentsBuilder,
133    ) -> ::std::borrow::Cow<'_, ::aws_smithy_runtime_api::client::runtime_components::RuntimeComponentsBuilder> {
134        #[allow(unused_mut)]
135        let mut rcb = ::aws_smithy_runtime_api::client::runtime_components::RuntimeComponentsBuilder::new("UpdateClusterConfig")
136            .with_interceptor(::aws_smithy_runtime::client::stalled_stream_protection::StalledStreamProtectionInterceptor::default())
137            .with_interceptor(UpdateClusterConfigEndpointParamsInterceptor)
138            .with_retry_classifier(::aws_smithy_runtime::client::retries::classifiers::TransientErrorClassifier::<
139                crate::operation::update_cluster_config::UpdateClusterConfigError,
140            >::new())
141            .with_retry_classifier(::aws_smithy_runtime::client::retries::classifiers::ModeledAsRetryableClassifier::<
142                crate::operation::update_cluster_config::UpdateClusterConfigError,
143            >::new())
144            .with_retry_classifier(::aws_runtime::retries::classifiers::AwsErrorCodeClassifier::<
145                crate::operation::update_cluster_config::UpdateClusterConfigError,
146            >::new());
147
148        ::std::borrow::Cow::Owned(rcb)
149    }
150}
151
152#[derive(Debug)]
153struct UpdateClusterConfigResponseDeserializer;
154impl ::aws_smithy_runtime_api::client::ser_de::DeserializeResponse for UpdateClusterConfigResponseDeserializer {
155    fn deserialize_nonstreaming(
156        &self,
157        response: &::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
158    ) -> ::aws_smithy_runtime_api::client::interceptors::context::OutputOrError {
159        let (success, status) = (response.status().is_success(), response.status().as_u16());
160        let headers = response.headers();
161        let body = response.body().bytes().expect("body loaded");
162        #[allow(unused_mut)]
163        let mut force_error = false;
164        ::tracing::debug!(request_id = ?::aws_types::request_id::RequestId::request_id(response));
165        let parse_result = if !success && status != 200 || force_error {
166            crate::protocol_serde::shape_update_cluster_config::de_update_cluster_config_http_error(status, headers, body)
167        } else {
168            crate::protocol_serde::shape_update_cluster_config::de_update_cluster_config_http_response(status, headers, body)
169        };
170        crate::protocol_serde::type_erase_result(parse_result)
171    }
172}
173#[derive(Debug)]
174struct UpdateClusterConfigRequestSerializer;
175impl ::aws_smithy_runtime_api::client::ser_de::SerializeRequest for UpdateClusterConfigRequestSerializer {
176    #[allow(unused_mut, clippy::let_and_return, clippy::needless_borrow, clippy::useless_conversion)]
177    fn serialize_input(
178        &self,
179        input: ::aws_smithy_runtime_api::client::interceptors::context::Input,
180        _cfg: &mut ::aws_smithy_types::config_bag::ConfigBag,
181    ) -> ::std::result::Result<::aws_smithy_runtime_api::client::orchestrator::HttpRequest, ::aws_smithy_runtime_api::box_error::BoxError> {
182        let input = input
183            .downcast::<crate::operation::update_cluster_config::UpdateClusterConfigInput>()
184            .expect("correct type");
185        let _header_serialization_settings = _cfg
186            .load::<crate::serialization_settings::HeaderSerializationSettings>()
187            .cloned()
188            .unwrap_or_default();
189        let mut request_builder = {
190            fn uri_base(
191                _input: &crate::operation::update_cluster_config::UpdateClusterConfigInput,
192                output: &mut ::std::string::String,
193            ) -> ::std::result::Result<(), ::aws_smithy_types::error::operation::BuildError> {
194                use ::std::fmt::Write as _;
195                let input_1 = &_input.name;
196                let input_1 = input_1
197                    .as_ref()
198                    .ok_or_else(|| ::aws_smithy_types::error::operation::BuildError::missing_field("name", "cannot be empty or unset"))?;
199                let name = ::aws_smithy_http::label::fmt_string(input_1, ::aws_smithy_http::label::EncodingStrategy::Default);
200                if name.is_empty() {
201                    return ::std::result::Result::Err(::aws_smithy_types::error::operation::BuildError::missing_field(
202                        "name",
203                        "cannot be empty or unset",
204                    ));
205                }
206                ::std::write!(output, "/clusters/{name}/update-config", name = name).expect("formatting should succeed");
207                ::std::result::Result::Ok(())
208            }
209            #[allow(clippy::unnecessary_wraps)]
210            fn update_http_builder(
211                input: &crate::operation::update_cluster_config::UpdateClusterConfigInput,
212                builder: ::http::request::Builder,
213            ) -> ::std::result::Result<::http::request::Builder, ::aws_smithy_types::error::operation::BuildError> {
214                let mut uri = ::std::string::String::new();
215                uri_base(input, &mut uri)?;
216                ::std::result::Result::Ok(builder.method("POST").uri(uri))
217            }
218            let mut builder = update_http_builder(&input, ::http::request::Builder::new())?;
219            builder = _header_serialization_settings.set_default_header(builder, ::http::header::CONTENT_TYPE, "application/json");
220            builder
221        };
222        let body = ::aws_smithy_types::body::SdkBody::from(crate::protocol_serde::shape_update_cluster_config::ser_update_cluster_config_input(
223            &input,
224        )?);
225        if let Some(content_length) = body.content_length() {
226            let content_length = content_length.to_string();
227            request_builder = _header_serialization_settings.set_default_header(request_builder, ::http::header::CONTENT_LENGTH, &content_length);
228        }
229        ::std::result::Result::Ok(request_builder.body(body).expect("valid request").try_into().unwrap())
230    }
231}
232#[derive(Debug)]
233struct UpdateClusterConfigEndpointParamsInterceptor;
234
235impl ::aws_smithy_runtime_api::client::interceptors::Intercept for UpdateClusterConfigEndpointParamsInterceptor {
236    fn name(&self) -> &'static str {
237        "UpdateClusterConfigEndpointParamsInterceptor"
238    }
239
240    fn read_before_execution(
241        &self,
242        context: &::aws_smithy_runtime_api::client::interceptors::context::BeforeSerializationInterceptorContextRef<
243            '_,
244            ::aws_smithy_runtime_api::client::interceptors::context::Input,
245            ::aws_smithy_runtime_api::client::interceptors::context::Output,
246            ::aws_smithy_runtime_api::client::interceptors::context::Error,
247        >,
248        cfg: &mut ::aws_smithy_types::config_bag::ConfigBag,
249    ) -> ::std::result::Result<(), ::aws_smithy_runtime_api::box_error::BoxError> {
250        let _input = context
251            .input()
252            .downcast_ref::<UpdateClusterConfigInput>()
253            .ok_or("failed to downcast to UpdateClusterConfigInput")?;
254
255        let params = crate::config::endpoint::Params::builder()
256            .set_region(cfg.load::<::aws_types::region::Region>().map(|r| r.as_ref().to_owned()))
257            .set_use_dual_stack(cfg.load::<::aws_types::endpoint_config::UseDualStack>().map(|ty| ty.0))
258            .set_use_fips(cfg.load::<::aws_types::endpoint_config::UseFips>().map(|ty| ty.0))
259            .set_endpoint(cfg.load::<::aws_types::endpoint_config::EndpointUrl>().map(|ty| ty.0.clone()))
260            .build()
261            .map_err(|err| {
262                ::aws_smithy_runtime_api::client::interceptors::error::ContextAttachedError::new("endpoint params could not be built", err)
263            })?;
264        cfg.interceptor_state()
265            .store_put(::aws_smithy_runtime_api::client::endpoint::EndpointResolverParams::new(params));
266        ::std::result::Result::Ok(())
267    }
268}
269
270// The get_* functions below are generated from JMESPath expressions in the
271// operationContextParams trait. They target the operation's input shape.
272
273/// Error type for the `UpdateClusterConfigError` operation.
274#[non_exhaustive]
275#[derive(::std::fmt::Debug)]
276pub enum UpdateClusterConfigError {
277    /// <p>These errors are usually caused by a client action. Actions can include using an action or resource on behalf of an <a href="https://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles_terms-and-concepts.html">IAM principal</a> that doesn't have permissions to use the action or resource or specifying an identifier that is not valid.</p>
278    ClientException(crate::types::error::ClientException),
279    /// <p>The specified parameter is invalid. Review the available parameters for the API request.</p>
280    InvalidParameterException(crate::types::error::InvalidParameterException),
281    /// <p>The request is invalid given the state of the cluster. Check the state of the cluster and the associated operations.</p>
282    InvalidRequestException(crate::types::error::InvalidRequestException),
283    /// <p>The specified resource is in use.</p>
284    ResourceInUseException(crate::types::error::ResourceInUseException),
285    /// <p>The specified resource could not be found. You can view your available clusters with <code>ListClusters</code>. You can view your available managed node groups with <code>ListNodegroups</code>. Amazon EKS clusters and node groups are Amazon Web Services Region specific.</p>
286    ResourceNotFoundException(crate::types::error::ResourceNotFoundException),
287    /// <p>These errors are usually caused by a server-side issue.</p>
288    ServerException(crate::types::error::ServerException),
289    /// <p>The request or operation couldn't be performed because a service is throttling requests.</p>
290    ThrottlingException(crate::types::error::ThrottlingException),
291    /// An unexpected error occurred (e.g., invalid JSON returned by the service or an unknown error code).
292    #[deprecated(note = "Matching `Unhandled` directly is not forwards compatible. Instead, match using a \
293    variable wildcard pattern and check `.code()`:
294     \
295    &nbsp;&nbsp;&nbsp;`err if err.code() == Some(\"SpecificExceptionCode\") => { /* handle the error */ }`
296     \
297    See [`ProvideErrorMetadata`](#impl-ProvideErrorMetadata-for-UpdateClusterConfigError) for what information is available for the error.")]
298    Unhandled(crate::error::sealed_unhandled::Unhandled),
299}
300impl UpdateClusterConfigError {
301    /// Creates the `UpdateClusterConfigError::Unhandled` variant from any error type.
302    pub fn unhandled(
303        err: impl ::std::convert::Into<::std::boxed::Box<dyn ::std::error::Error + ::std::marker::Send + ::std::marker::Sync + 'static>>,
304    ) -> Self {
305        Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
306            source: err.into(),
307            meta: ::std::default::Default::default(),
308        })
309    }
310
311    /// Creates the `UpdateClusterConfigError::Unhandled` variant from an [`ErrorMetadata`](::aws_smithy_types::error::ErrorMetadata).
312    pub fn generic(err: ::aws_smithy_types::error::ErrorMetadata) -> Self {
313        Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
314            source: err.clone().into(),
315            meta: err,
316        })
317    }
318    ///
319    /// Returns error metadata, which includes the error code, message,
320    /// request ID, and potentially additional information.
321    ///
322    pub fn meta(&self) -> &::aws_smithy_types::error::ErrorMetadata {
323        match self {
324            Self::ClientException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
325            Self::InvalidParameterException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
326            Self::InvalidRequestException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
327            Self::ResourceInUseException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
328            Self::ResourceNotFoundException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
329            Self::ServerException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
330            Self::ThrottlingException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
331            Self::Unhandled(e) => &e.meta,
332        }
333    }
334    /// Returns `true` if the error kind is `UpdateClusterConfigError::ClientException`.
335    pub fn is_client_exception(&self) -> bool {
336        matches!(self, Self::ClientException(_))
337    }
338    /// Returns `true` if the error kind is `UpdateClusterConfigError::InvalidParameterException`.
339    pub fn is_invalid_parameter_exception(&self) -> bool {
340        matches!(self, Self::InvalidParameterException(_))
341    }
342    /// Returns `true` if the error kind is `UpdateClusterConfigError::InvalidRequestException`.
343    pub fn is_invalid_request_exception(&self) -> bool {
344        matches!(self, Self::InvalidRequestException(_))
345    }
346    /// Returns `true` if the error kind is `UpdateClusterConfigError::ResourceInUseException`.
347    pub fn is_resource_in_use_exception(&self) -> bool {
348        matches!(self, Self::ResourceInUseException(_))
349    }
350    /// Returns `true` if the error kind is `UpdateClusterConfigError::ResourceNotFoundException`.
351    pub fn is_resource_not_found_exception(&self) -> bool {
352        matches!(self, Self::ResourceNotFoundException(_))
353    }
354    /// Returns `true` if the error kind is `UpdateClusterConfigError::ServerException`.
355    pub fn is_server_exception(&self) -> bool {
356        matches!(self, Self::ServerException(_))
357    }
358    /// Returns `true` if the error kind is `UpdateClusterConfigError::ThrottlingException`.
359    pub fn is_throttling_exception(&self) -> bool {
360        matches!(self, Self::ThrottlingException(_))
361    }
362}
363impl ::std::error::Error for UpdateClusterConfigError {
364    fn source(&self) -> ::std::option::Option<&(dyn ::std::error::Error + 'static)> {
365        match self {
366            Self::ClientException(_inner) => ::std::option::Option::Some(_inner),
367            Self::InvalidParameterException(_inner) => ::std::option::Option::Some(_inner),
368            Self::InvalidRequestException(_inner) => ::std::option::Option::Some(_inner),
369            Self::ResourceInUseException(_inner) => ::std::option::Option::Some(_inner),
370            Self::ResourceNotFoundException(_inner) => ::std::option::Option::Some(_inner),
371            Self::ServerException(_inner) => ::std::option::Option::Some(_inner),
372            Self::ThrottlingException(_inner) => ::std::option::Option::Some(_inner),
373            Self::Unhandled(_inner) => ::std::option::Option::Some(&*_inner.source),
374        }
375    }
376}
377impl ::std::fmt::Display for UpdateClusterConfigError {
378    fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result {
379        match self {
380            Self::ClientException(_inner) => _inner.fmt(f),
381            Self::InvalidParameterException(_inner) => _inner.fmt(f),
382            Self::InvalidRequestException(_inner) => _inner.fmt(f),
383            Self::ResourceInUseException(_inner) => _inner.fmt(f),
384            Self::ResourceNotFoundException(_inner) => _inner.fmt(f),
385            Self::ServerException(_inner) => _inner.fmt(f),
386            Self::ThrottlingException(_inner) => _inner.fmt(f),
387            Self::Unhandled(_inner) => {
388                if let ::std::option::Option::Some(code) = ::aws_smithy_types::error::metadata::ProvideErrorMetadata::code(self) {
389                    write!(f, "unhandled error ({code})")
390                } else {
391                    f.write_str("unhandled error")
392                }
393            }
394        }
395    }
396}
397impl ::aws_smithy_types::retry::ProvideErrorKind for UpdateClusterConfigError {
398    fn code(&self) -> ::std::option::Option<&str> {
399        ::aws_smithy_types::error::metadata::ProvideErrorMetadata::code(self)
400    }
401    fn retryable_error_kind(&self) -> ::std::option::Option<::aws_smithy_types::retry::ErrorKind> {
402        ::std::option::Option::None
403    }
404}
405impl ::aws_smithy_types::error::metadata::ProvideErrorMetadata for UpdateClusterConfigError {
406    fn meta(&self) -> &::aws_smithy_types::error::ErrorMetadata {
407        match self {
408            Self::ClientException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
409            Self::InvalidParameterException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
410            Self::InvalidRequestException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
411            Self::ResourceInUseException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
412            Self::ResourceNotFoundException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
413            Self::ServerException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
414            Self::ThrottlingException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
415            Self::Unhandled(_inner) => &_inner.meta,
416        }
417    }
418}
419impl ::aws_smithy_runtime_api::client::result::CreateUnhandledError for UpdateClusterConfigError {
420    fn create_unhandled_error(
421        source: ::std::boxed::Box<dyn ::std::error::Error + ::std::marker::Send + ::std::marker::Sync + 'static>,
422        meta: ::std::option::Option<::aws_smithy_types::error::ErrorMetadata>,
423    ) -> Self {
424        Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
425            source,
426            meta: meta.unwrap_or_default(),
427        })
428    }
429}
430impl ::aws_types::request_id::RequestId for crate::operation::update_cluster_config::UpdateClusterConfigError {
431    fn request_id(&self) -> Option<&str> {
432        self.meta().request_id()
433    }
434}
435
436pub use crate::operation::update_cluster_config::_update_cluster_config_output::UpdateClusterConfigOutput;
437
438pub use crate::operation::update_cluster_config::_update_cluster_config_input::UpdateClusterConfigInput;
439
440mod _update_cluster_config_input;
441
442mod _update_cluster_config_output;
443
444/// Builders
445pub mod builders;