com.amazonaws.services.kinesis.clientlibrary.proxies

Class MetricsCollectingKinesisProxyDecorator

java.lang.Object

com.amazonaws.services.kinesis.clientlibrary.proxies.MetricsCollectingKinesisProxyDecorator

All Implemented Interfaces:

IKinesisProxy

public class MetricsCollectingKinesisProxyDecorator
extends Object
implements IKinesisProxy

IKinesisProxy implementation that wraps another implementation and collects metrics.

Constructor Summary

Constructors

Constructor and Description
MetricsCollectingKinesisProxyDecorator(String prefix, IKinesisProxy other, String shardId) Constructor.

Method Summary

Modifier and Type	Method and Description
GetRecordsResult	get(String shardIterator, int maxRecords) Get records from stream.
Set<String>	getAllShardIds() Fetch the shardIds of all shards in the stream.
String	getIterator(String shardId, String iteratorEnum, String sequenceNumber) Fetch a shard iterator from the specified position in the shard.
List<Shard>	getShardList() Fetch all the shards defined for the stream (e.g.
DescribeStreamResult	getStreamInfo(String startingShardId) Fetch information about stream.
PutRecordResult	put(String sequenceNumberForOrdering, String explicitHashKey, String partitionKey, ByteBuffer data)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MetricsCollectingKinesisProxyDecorator

public MetricsCollectingKinesisProxyDecorator(String prefix,
                                              IKinesisProxy other,
                                              String shardId)

Constructor.

Parameters:

prefix - prefix for generated metrics

other - Kinesis proxy to decorate

shardId - shardId will be included in the metrics.

Method Detail

get

public GetRecordsResult get(String shardIterator,
                            int maxRecords)
                     throws ResourceNotFoundException,
                            InvalidArgumentException,
                            ExpiredIteratorException

Get records from stream.

Specified by:

get in interface IKinesisProxy

Parameters:

shardIterator - Fetch data records using this shard iterator

maxRecords - Fetch at most this many records

Returns:

List of data records from Kinesis.

Throws:

ResourceNotFoundException - The Kinesis stream or shard was not found

InvalidArgumentException - Invalid input parameters

ExpiredIteratorException - The iterator has expired

getStreamInfo

public DescribeStreamResult getStreamInfo(String startingShardId)
                                   throws ResourceNotFoundException

Fetch information about stream. Useful for fetching the list of shards in a stream.

Specified by:

getStreamInfo in interface IKinesisProxy

Parameters:

startingShardId - exclusive start shardId - used when paginating the list of shards.

Returns:

DescribeStreamOutput object containing a description of the stream.

Throws:

ResourceNotFoundException - The Kinesis stream was not found

getAllShardIds

public Set<String> getAllShardIds()
                           throws ResourceNotFoundException

Fetch the shardIds of all shards in the stream.

Specified by:

getAllShardIds in interface IKinesisProxy

Returns:

Set of all shardIds

Throws:

ResourceNotFoundException - If the specified Kinesis stream was not found

getIterator

public String getIterator(String shardId,
                          String iteratorEnum,
                          String sequenceNumber)
                   throws ResourceNotFoundException,
                          InvalidArgumentException

Fetch a shard iterator from the specified position in the shard.

Specified by:

getIterator in interface IKinesisProxy

Parameters:

shardId - Shard id

iteratorEnum - one of: TRIM_HORIZON, LATEST, AT_SEQUENCE_NUMBER, AFTER_SEQUENCE_NUMBER

sequenceNumber - the sequence number - must be null unless iteratorEnum is AT_SEQUENCE_NUMBER or AFTER_SEQUENCE_NUMBER

Returns:

shard iterator which can be used to read data from Kinesis.

Throws:

ResourceNotFoundException - The Kinesis stream or shard was not found

InvalidArgumentException - Invalid input parameters

getShardList

public List<Shard> getShardList()
                         throws ResourceNotFoundException

Fetch all the shards defined for the stream (e.g. obtained via calls to the DescribeStream API). This can be used to discover new shards and consume data from them.

Specified by:

getShardList in interface IKinesisProxy

Returns:

List of all shards in the Kinesis stream.

Throws:

ResourceNotFoundException - The Kinesis stream was not found.

put

public PutRecordResult put(String sequenceNumberForOrdering,
                           String explicitHashKey,
                           String partitionKey,
                           ByteBuffer data)
                    throws ResourceNotFoundException,
                           InvalidArgumentException

Specified by:

put in interface IKinesisProxy

Parameters:

sequenceNumberForOrdering - (optional) used for record ordering

explicitHashKey - optionally supplied transformation of partitionkey

partitionKey - for this record

data - payload

Returns:

PutRecordResult (contains the Kinesis sequence number of the record).

Throws:

ResourceNotFoundException - The Kinesis stream was not found.

InvalidArgumentException - InvalidArgumentException.