aws_sdk_redshift/operation/describe_default_cluster_parameters/
paginator.rs

1// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
2/// Paginator for [`DescribeDefaultClusterParameters`](crate::operation::describe_default_cluster_parameters::DescribeDefaultClusterParameters)
3pub struct DescribeDefaultClusterParametersPaginator {
4    handle: std::sync::Arc<crate::client::Handle>,
5    builder: crate::operation::describe_default_cluster_parameters::builders::DescribeDefaultClusterParametersInputBuilder,
6    stop_on_duplicate_token: bool,
7}
8
9impl DescribeDefaultClusterParametersPaginator {
10    /// Create a new paginator-wrapper
11    pub(crate) fn new(
12        handle: std::sync::Arc<crate::client::Handle>,
13        builder: crate::operation::describe_default_cluster_parameters::builders::DescribeDefaultClusterParametersInputBuilder,
14    ) -> Self {
15        Self {
16            handle,
17            builder,
18            stop_on_duplicate_token: true,
19        }
20    }
21
22    /// Set the page size
23    ///
24    /// _Note: this method will override any previously set value for `max_records`_
25    pub fn page_size(mut self, limit: i32) -> Self {
26        self.builder.max_records = ::std::option::Option::Some(limit);
27        self
28    }
29
30    /// Create a flattened paginator
31    ///
32    /// This paginator automatically flattens results using `default_cluster_parameters.parameters`. Queries to the underlying service
33    /// are dispatched lazily.
34    pub fn items(self) -> crate::operation::describe_default_cluster_parameters::paginator::DescribeDefaultClusterParametersPaginatorItems {
35        crate::operation::describe_default_cluster_parameters::paginator::DescribeDefaultClusterParametersPaginatorItems(self)
36    }
37
38    /// Stop paginating when the service returns the same pagination token twice in a row.
39    ///
40    /// Defaults to true.
41    ///
42    /// For certain operations, it may be useful to continue on duplicate token. For example,
43    /// if an operation is for tailing a log file in real-time, then continuing may be desired.
44    /// This option can be set to `false` to accommodate these use cases.
45    pub fn stop_on_duplicate_token(mut self, stop_on_duplicate_token: bool) -> Self {
46        self.stop_on_duplicate_token = stop_on_duplicate_token;
47        self
48    }
49
50    /// Create the pagination stream
51    ///
52    /// _Note:_ No requests will be dispatched until the stream is used
53    /// (e.g. with the [`.next().await`](aws_smithy_async::future::pagination_stream::PaginationStream::next) method).
54    pub fn send(
55        self,
56    ) -> ::aws_smithy_async::future::pagination_stream::PaginationStream<
57        ::std::result::Result<
58            crate::operation::describe_default_cluster_parameters::DescribeDefaultClusterParametersOutput,
59            ::aws_smithy_runtime_api::client::result::SdkError<
60                crate::operation::describe_default_cluster_parameters::DescribeDefaultClusterParametersError,
61                ::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
62            >,
63        >,
64    > {
65        // Move individual fields out of self for the borrow checker
66        let builder = self.builder;
67        let handle = self.handle;
68        let runtime_plugins = crate::operation::describe_default_cluster_parameters::DescribeDefaultClusterParameters::operation_runtime_plugins(
69            handle.runtime_plugins.clone(),
70            &handle.conf,
71            ::std::option::Option::None,
72        )
73        .with_operation_plugin(crate::sdk_feature_tracker::paginator::PaginatorFeatureTrackerRuntimePlugin::new());
74        ::aws_smithy_async::future::pagination_stream::PaginationStream::new(::aws_smithy_async::future::pagination_stream::fn_stream::FnStream::new(
75            move |tx| {
76                ::std::boxed::Box::pin(async move {
77                    // Build the input for the first time. If required fields are missing, this is where we'll produce an early error.
78                    let mut input = match builder
79                        .build()
80                        .map_err(::aws_smithy_runtime_api::client::result::SdkError::construction_failure)
81                    {
82                        ::std::result::Result::Ok(input) => input,
83                        ::std::result::Result::Err(e) => {
84                            let _ = tx.send(::std::result::Result::Err(e)).await;
85                            return;
86                        }
87                    };
88                    loop {
89                        let resp = crate::operation::describe_default_cluster_parameters::DescribeDefaultClusterParameters::orchestrate(
90                            &runtime_plugins,
91                            input.clone(),
92                        )
93                        .await;
94                        // If the input member is None or it was an error
95                        let done = match resp {
96                            ::std::result::Result::Ok(ref resp) => {
97                                let new_token =
98                                    crate::lens::reflens_describe_default_cluster_parameters_output_output_default_cluster_parameters_marker(resp);
99                                // Pagination is exhausted when the next token is an empty string
100                                let is_empty = new_token.map(|token| token.is_empty()).unwrap_or(true);
101                                if !is_empty && new_token == input.marker.as_ref() && self.stop_on_duplicate_token {
102                                    true
103                                } else {
104                                    input.marker = new_token.cloned();
105                                    is_empty
106                                }
107                            }
108                            ::std::result::Result::Err(_) => true,
109                        };
110                        if tx.send(resp).await.is_err() {
111                            // receiving end was dropped
112                            return;
113                        }
114                        if done {
115                            return;
116                        }
117                    }
118                })
119            },
120        ))
121    }
122}
123
124/// Flattened paginator for `DescribeDefaultClusterParametersPaginator`
125///
126/// This is created with [`.items()`](DescribeDefaultClusterParametersPaginator::items)
127pub struct DescribeDefaultClusterParametersPaginatorItems(DescribeDefaultClusterParametersPaginator);
128
129impl DescribeDefaultClusterParametersPaginatorItems {
130    /// Create the pagination stream
131    ///
132    /// _Note_: No requests will be dispatched until the stream is used
133    /// (e.g. with the [`.next().await`](aws_smithy_async::future::pagination_stream::PaginationStream::next) method).
134    ///
135    /// To read the entirety of the paginator, use [`.collect::<Result<Vec<_>, _>()`](aws_smithy_async::future::pagination_stream::PaginationStream::collect).
136    pub fn send(
137        self,
138    ) -> ::aws_smithy_async::future::pagination_stream::PaginationStream<
139        ::std::result::Result<
140            crate::types::Parameter,
141            ::aws_smithy_runtime_api::client::result::SdkError<
142                crate::operation::describe_default_cluster_parameters::DescribeDefaultClusterParametersError,
143                ::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
144            >,
145        >,
146    > {
147        ::aws_smithy_async::future::pagination_stream::TryFlatMap::new(self.0.send()).flat_map(|page| {
148            crate::lens::lens_describe_default_cluster_parameters_output_output_default_cluster_parameters_parameters(page)
149                .unwrap_or_default()
150                .into_iter()
151        })
152    }
153}
aws_sdk_redshift/operation/describe_default_cluster_parameters/paginator.rs

aws_sdk_redshift/operation/describe_default_cluster_parameters/
paginator.rs
