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

// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
/// Paginator for [`DescribeLoadBalancers`](crate::operation::DescribeLoadBalancers)
pub struct DescribeLoadBalancersPaginator<
    C = aws_smithy_client::erase::DynConnector,
    M = crate::middleware::DefaultMiddleware,
    R = aws_smithy_client::retry::Standard,
> {
    handle: std::sync::Arc<crate::client::Handle<C, M, R>>,
    builder: crate::input::describe_load_balancers_input::Builder,
}

impl<C, M, R> DescribeLoadBalancersPaginator<C, M, R>
where
    C: aws_smithy_client::bounds::SmithyConnector,
    M: aws_smithy_client::bounds::SmithyMiddleware<C>,
    R: aws_smithy_client::retry::NewRequestPolicy,
{
    /// Create a new paginator-wrapper
    pub(crate) fn new(
        handle: std::sync::Arc<crate::client::Handle<C, M, R>>,
        builder: crate::input::describe_load_balancers_input::Builder,
    ) -> Self {
        Self { handle, builder }
    }

    /// Create a flattened paginator
    ///
    /// This paginator automatically flattens results using `load_balancer_descriptions`. Queries to the underlying service
    /// are dispatched lazily.
    pub fn items(self) -> crate::paginator::DescribeLoadBalancersPaginatorItems<C, M, R> {
        crate::paginator::DescribeLoadBalancersPaginatorItems(self)
    }

    /// Create the pagination stream
    ///
    /// _Note:_ No requests will be dispatched until the stream is used (eg. with [`.next().await`](tokio_stream::StreamExt::next)).
    pub fn send(
        self,
    ) -> impl tokio_stream::Stream<
        Item = std::result::Result<
            crate::output::DescribeLoadBalancersOutput,
            aws_smithy_http::result::SdkError<crate::error::DescribeLoadBalancersError>,
        >,
    > + Unpin
    where
        R::Policy: aws_smithy_client::bounds::SmithyRetryPolicy<
            crate::input::DescribeLoadBalancersInputOperationOutputAlias,
            crate::output::DescribeLoadBalancersOutput,
            crate::error::DescribeLoadBalancersError,
            crate::input::DescribeLoadBalancersInputOperationRetryAlias,
        >,
    {
        // Move individual fields out of self for the borrow checker
        let builder = self.builder;
        let handle = self.handle;
        aws_smithy_async::future::fn_stream::FnStream::new(move |tx| {
            Box::pin(async move {
                // Build the input for the first time. If required fields are missing, this is where we'll produce an early error.
                let mut input = match builder.build().map_err(|err| {
                    aws_smithy_http::result::SdkError::ConstructionFailure(err.into())
                }) {
                    Ok(input) => input,
                    Err(e) => {
                        let _ = tx.send(Err(e)).await;
                        return;
                    }
                };
                loop {
                    let op = match input.make_operation(&handle.conf).await.map_err(|err| {
                        aws_smithy_http::result::SdkError::ConstructionFailure(err.into())
                    }) {
                        Ok(op) => op,
                        Err(e) => {
                            let _ = tx.send(Err(e)).await;
                            return;
                        }
                    };
                    let resp = handle.client.call(op).await;
                    // If the input member is None or it was an error
                    let done = match resp {
                        Ok(ref resp) => {
                            let new_token = crate::lens::reflens_structure_crate_output_describe_load_balancers_output_next_marker(resp);
                            let is_empty = new_token.map(|token| token.is_empty()).unwrap_or(true);
                            if !is_empty && new_token == input.marker.as_ref() {
                                let _ = tx.send(Err(aws_smithy_http::result::SdkError::ConstructionFailure("next token did not change, aborting paginator. This indicates an SDK or AWS service bug.".into()))).await;
                                return;
                            }
                            input.marker = new_token.cloned();
                            is_empty
                        }
                        Err(_) => true,
                    };
                    if tx.send(resp).await.is_err() {
                        // receiving end was dropped
                        return;
                    }
                    if done {
                        return;
                    }
                }
            })
        })
    }
}

/// Flattened paginator for `DescribeLoadBalancersPaginator`
///
/// This is created with [`.items()`](DescribeLoadBalancersPaginator::items)
pub struct DescribeLoadBalancersPaginatorItems<
    C = aws_smithy_client::erase::DynConnector,
    M = crate::middleware::DefaultMiddleware,
    R = aws_smithy_client::retry::Standard,
>(DescribeLoadBalancersPaginator<C, M, R>);

impl<C, M, R> DescribeLoadBalancersPaginatorItems<C, M, R>
where
    C: aws_smithy_client::bounds::SmithyConnector,
    M: aws_smithy_client::bounds::SmithyMiddleware<C>,
    R: aws_smithy_client::retry::NewRequestPolicy,
{
    /// Create the pagination stream
    ///
    /// _Note: No requests will be dispatched until the stream is used (eg. with [`.next().await`](tokio_stream::StreamExt::next))._
    ///
    /// To read the entirety of the paginator, use [`.collect::<Result<Vec<_>, _>()`](tokio_stream::StreamExt::collect).
    pub fn send(
        self,
    ) -> impl tokio_stream::Stream<
        Item = std::result::Result<
            crate::model::LoadBalancerDescription,
            aws_smithy_http::result::SdkError<crate::error::DescribeLoadBalancersError>,
        >,
    > + Unpin
    where
        R::Policy: aws_smithy_client::bounds::SmithyRetryPolicy<
            crate::input::DescribeLoadBalancersInputOperationOutputAlias,
            crate::output::DescribeLoadBalancersOutput,
            crate::error::DescribeLoadBalancersError,
            crate::input::DescribeLoadBalancersInputOperationRetryAlias,
        >,
    {
        aws_smithy_async::future::fn_stream::TryFlatMap::new(self.0.send()).flat_map(|page| crate::lens::lens_structure_crate_output_describe_load_balancers_output_load_balancer_descriptions(page).unwrap_or_default().into_iter())
    }
}