AWS SDK Version 2 for .NET
API Reference

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.NET Framework 3.5
 
Gets a shard iterator. A shard iterator expires five minutes after it is returned to the requester.

A shard iterator specifies the position in the shard from which to start reading data records sequentially. A shard iterator specifies this position using the sequence number of a data record in a shard. A sequence number is the identifier associated with every record ingested in the Amazon Kinesis stream. The sequence number is assigned when a record is put into the stream.

You must specify the shard iterator type. For example, you can set the ShardIteratorType parameter to read exactly from the position denoted by a specific sequence number by using the AT_SEQUENCE_NUMBER shard iterator type, or right after the sequence number by using the AFTER_SEQUENCE_NUMBER shard iterator type, using sequence numbers returned by earlier calls to PutRecord, PutRecords, GetRecords, or DescribeStream. You can specify the shard iterator type TRIM_HORIZON in the request to cause ShardIterator to point to the last untrimmed record in the shard in the system, which is the oldest data record in the shard. Or you can point to just after the most recent record in the shard, by using the shard iterator type LATEST, so that you always read the most recent data in the shard.

When you repeatedly read from an Amazon Kinesis stream use a GetShardIterator request to get the first shard iterator for use in your first GetRecords request and then use the shard iterator returned by the GetRecords request in NextShardIterator for subsequent reads. A new shard iterator is returned by every GetRecords request in NextShardIterator, which you use in the ShardIterator parameter of the next GetRecords request.

If a GetShardIterator request is made too often, you receive a ProvisionedThroughputExceededException. For more information about throughput limits, see GetRecords.

If the shard is closed, the iterator can't return more data, and GetShardIterator returns null for its ShardIterator. A shard can be closed using SplitShard or MergeShards.

GetShardIterator has a limit of 5 transactions per second per account per open shard.

Namespace: Amazon.Kinesis
Assembly: AWSSDK.dll
Version: (assembly version)

Syntax

C#
public abstract GetShardIteratorResponse GetShardIterator(
         GetShardIteratorRequest request
)

Parameters

request
Type: Amazon.Kinesis.Model.GetShardIteratorRequest

Container for the necessary parameters to execute the GetShardIterator service method.

Return Value
Type: Amazon.Kinesis.Model.GetShardIteratorResponse
The response from the GetShardIterator service method, as returned by Kinesis.

Exceptions

ExceptionCondition
InvalidArgumentException A specified parameter exceeds its restrictions, is not supported, or can't be used. For more information, see the returned message.
ProvisionedThroughputExceededException The request rate is too high, or the requested data is too large for the available throughput. Reduce the frequency or size of your requests. For more information, see Error Retries and Exponential Backoff in AWS in the AWS General Reference.
ResourceNotFoundException The requested resource could not be found. The stream might not be specified correctly, or it might not be in the ACTIVE state if the operation requires it.

Version Information

.NET Framework:
Supported in: 4.5, 4.0, 3.5