Struct aws_sdk_kinesis::client::fluent_builders::MergeShards

pub struct MergeShards { /* private fields */ }

Fluent builder constructing a request to MergeShards.

Merges two adjacent shards in a Kinesis data stream and combines them into a single shard to reduce the stream's capacity to ingest and transport data. This API is only supported for the data streams with the provisioned capacity mode. Two shards are considered adjacent if the union of the hash key ranges for the two shards form a contiguous set with no gaps. For example, if you have two shards, one with a hash key range of 276...381 and the other with a hash key range of 382...454, then you could merge these two shards into a single shard that would have a hash key range of 276...454. After the merge, the single child shard receives data for all hash key values covered by the two parent shards.

When invoking this API, it is recommended you use the StreamARN input parameter rather than the StreamName input parameter.

MergeShards is called when there is a need to reduce the overall capacity of a stream because of excess capacity that is not being used. You must specify the shard to be merged and the adjacent shard for a stream. For more information about merging shards, see Merge Two Shards in the Amazon Kinesis Data Streams Developer Guide.

If the stream is in the ACTIVE state, you can call MergeShards. If a stream is in the CREATING, UPDATING, or DELETING state, MergeShards returns a ResourceInUseException. If the specified stream does not exist, MergeShards returns a ResourceNotFoundException.

You can use DescribeStreamSummary to check the state of the stream, which is returned in StreamStatus.

MergeShards is an asynchronous operation. Upon receiving a MergeShards request, Amazon Kinesis Data Streams immediately returns a response and sets the StreamStatus to UPDATING. After the operation is completed, Kinesis Data Streams sets the StreamStatus to ACTIVE. Read and write operations continue to work while the stream is in the UPDATING state.

You use DescribeStreamSummary and the ListShards APIs to determine the shard IDs that are specified in the MergeShards request.

If you try to operate on too many streams in parallel using CreateStream, DeleteStream, MergeShards, or SplitShard, you receive a LimitExceededException.

MergeShards has a limit of five transactions per second per account.

Implementations

impl MergeShards

pub async fn customize(
    self
) -> Result<CustomizableOperation<MergeShards, AwsResponseRetryClassifier>, SdkError<MergeShardsError>>

Consume this builder, creating a customizable operation that can be modified before being sent. The operation’s inner http::Request can be modified as well.

pub async fn send(self) -> Result<MergeShardsOutput, SdkError<MergeShardsError>>

Sends the request and returns the response.

If an error occurs, an SdkError will be returned with additional details that can be matched against.

By default, any retryable failures will be retried twice. Retry behavior is configurable with the RetryConfig, which can be set when configuring the client.

pub fn stream_name(self, input: impl Into<String>) -> Self

The name of the stream for the merge.

pub fn set_stream_name(self, input: Option<String>) -> Self

The name of the stream for the merge.

pub fn shard_to_merge(self, input: impl Into<String>) -> Self

The shard ID of the shard to combine with the adjacent shard for the merge.

pub fn set_shard_to_merge(self, input: Option<String>) -> Self

The shard ID of the shard to combine with the adjacent shard for the merge.

pub fn adjacent_shard_to_merge(self, input: impl Into<String>) -> Self

The shard ID of the adjacent shard for the merge.

pub fn set_adjacent_shard_to_merge(self, input: Option<String>) -> Self

The shard ID of the adjacent shard for the merge.

pub fn stream_arn(self, input: impl Into<String>) -> Self

The ARN of the stream.

pub fn set_stream_arn(self, input: Option<String>) -> Self

The ARN of the stream.

Trait Implementations

impl Clone for MergeShards

fn clone(&self) -> MergeShards

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MergeShards

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.