This operation establishes an HTTP/2 connection between the consumer you specify in the ConsumerARN parameter and the shard you specify in the ShardId parameter¶

Description¶

This operation establishes an HTTP/2 connection between the consumer you specify in the ConsumerARN parameter and the shard you specify in the ShardId parameter. After the connection is successfully established, Kinesis Data Streams pushes records from the shard to the consumer over this connection. Before you call this operation, call register_stream_consumer to register the consumer with Kinesis Data Streams.

When the subscribe_to_shard call succeeds, your consumer starts receiving events of type SubscribeToShardEvent over the HTTP/2 connection for up to 5 minutes, after which time you need to call subscribe_to_shard again to renew the subscription if you want to continue to receive records.

You can make one call to subscribe_to_shard per second per registered consumer per shard. For example, if you have a 4000 shard stream and two registered stream consumers, you can make one subscribe_to_shard request per second for each combination of shard and registered consumer, allowing you to subscribe both consumers to all 4000 shards in one second.

If you call subscribe_to_shard again with the same ConsumerARN and ShardId within 5 seconds of a successful call, you'll get a ResourceInUseException. If you call subscribe_to_shard 5 seconds or more after a successful call, the second call takes over the subscription and the previous connection expires or fails with a ResourceInUseException.

For an example of how to use this operation, see Enhanced Fan-Out Using the Kinesis Data Streams API.

Usage¶

kinesis_subscribe_to_shard(ConsumerARN, StreamId, ShardId,
  StartingPosition, DryRun)

Arguments¶

• ConsumerARN

  [required] For this parameter, use the value you obtained when you called register_stream_consumer.

• StreamId

  Not Implemented. Reserved for future use.

• ShardId

  [required] The ID of the shard you want to subscribe to. To see a list of all the shards for a given stream, use list_shards.

• StartingPosition

  [required] The starting position in the data stream from which to start streaming.

• DryRun

  Checks if your request will succeed. DryRun is an optional parameter.

Value¶

A list with the following syntax:

list(
  EventStream = list(
    SubscribeToShardEvent = list(
      Records = list(
        list(
          SequenceNumber = "string",
          ApproximateArrivalTimestamp = as.POSIXct(
            "2015-01-01"
          ),
          Data = raw,
          PartitionKey = "string",
          EncryptionType = "NONE"|"KMS"
        )
      ),
      ContinuationSequenceNumber = "string",
      MillisBehindLatest = 123,
      ChildShards = list(
        list(
          ShardId = "string",
          ParentShards = list(
            "string"
          ),
          HashKeyRange = list(
            StartingHashKey = "string",
            EndingHashKey = "string"
          )
        )
      )
    ),
    ResourceNotFoundException = list(
      message = "string"
    ),
    ResourceInUseException = list(
      message = "string"
    ),
    KMSDisabledException = list(
      message = "string"
    ),
    KMSInvalidStateException = list(
      message = "string"
    ),
    KMSAccessDeniedException = list(
      message = "string"
    ),
    KMSNotFoundException = list(
      message = "string"
    ),
    KMSOptInRequired = list(
      message = "string"
    ),
    KMSThrottlingException = list(
      message = "string"
    ),
    InternalFailureException = list(
      message = "string"
    )
  )
)

Request syntax¶

svc$subscribe_to_shard(
  ConsumerARN = "string",
  StreamId = "string",
  ShardId = "string",
  StartingPosition = list(
    Type = "AT_SEQUENCE_NUMBER"|"AFTER_SEQUENCE_NUMBER"|"TRIM_HORIZON"|"LATEST"|"AT_TIMESTAMP",
    SequenceNumber = "string",
    Timestamp = as.POSIXct(
      "2015-01-01"
    )
  ),
  DryRun = TRUE|FALSE
)