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// Copyright Materialize, Inc. and contributors. All rights reserved.
//
// Use of this software is governed by the Business Source License
// included in the LICENSE file.
//
// As of the Change Date specified in that file, in accordance with
// the Business Source License, use of this software will be governed
// by the Apache License, Version 2.0.
//! AWS Kinesis client and utilities.
use aws_sdk_kinesis::error::{GetShardIteratorError, ListShardsError};
use aws_sdk_kinesis::model::{Shard, ShardIteratorType};
use aws_sdk_kinesis::types::SdkError;
use aws_sdk_kinesis::Client;
use aws_types::SdkConfig;
use crate::util;
/// Constructs a new AWS Kinesis client that respects the system proxy configuration.
pub fn client(config: &SdkConfig) -> Client {
Client::from_conf_conn(config.into(), util::connector())
}
/// Lists the shards of the named Kinesis stream.
///
/// This function wraps the `ListShards` API call. It returns all shards in a
/// given Kinesis stream, automatically handling pagination if required.
///
/// # Errors
///
/// Any errors from the underlying `GetShardIterator` API call are surfaced
/// directly.
pub async fn list_shards(
client: &Client,
stream_name: &str,
) -> Result<Vec<Shard>, SdkError<ListShardsError>> {
let mut next_token = None;
let mut shards = Vec::new();
loop {
let res = client
.list_shards()
.set_next_token(next_token)
.stream_name(stream_name)
.send()
.await?;
shards.extend(res.shards.unwrap_or_else(Vec::new));
if res.next_token.is_some() {
next_token = res.next_token;
} else {
return Ok(shards);
}
}
}
/// Gets the shard IDs of the named Kinesis stream.
///
/// This function is like [`list_shards`], but
///
/// # Errors
///
/// Any errors from the underlying `GetShardIterator` API call are surfaced
/// directly.
pub async fn get_shard_ids(
client: &Client,
stream_name: &str,
) -> Result<impl Iterator<Item = String>, SdkError<ListShardsError>> {
let res = list_shards(client, stream_name).await?;
Ok(res
.into_iter()
.map(|s| s.shard_id.unwrap_or_else(|| "".into())))
}
/// Constructs an iterator over a Kinesis shard.
///
/// This function is a wrapper around around the `GetShardIterator` API. It
/// returns the `TRIM_HORIZON` shard iterator of a given stream and shard,
/// meaning it will return the location in the shard with the oldest data
/// record.
///
/// # Errors
///
/// Any errors from the underlying `GetShardIterator` API call are surfaced
/// directly.
pub async fn get_shard_iterator(
client: &Client,
stream_name: &str,
shard_id: &str,
) -> Result<Option<String>, SdkError<GetShardIteratorError>> {
let res = client
.get_shard_iterator()
.stream_name(stream_name)
.shard_id(shard_id)
.shard_iterator_type(ShardIteratorType::TrimHorizon)
.send()
.await?;
Ok(res.shard_iterator)
}