public interface AmazonKinesis
Amazon Kinesis Streams is a managed service that scales elastically for real time processing of streaming big data.
| Modifier and Type | Method and Description |
|---|---|
void |
addTagsToStream(AddTagsToStreamRequest addTagsToStreamRequest)
Adds or updates tags for the specified Amazon Kinesis stream.
|
void |
createStream(CreateStreamRequest createStreamRequest)
Creates an Amazon Kinesis stream.
|
void |
createStream(String streamName,
Integer shardCount)
Simplified method form for invoking the CreateStream operation.
|
void |
decreaseStreamRetentionPeriod(DecreaseStreamRetentionPeriodRequest decreaseStreamRetentionPeriodRequest)
Decreases the Amazon Kinesis stream's retention period, which is the
length of time data records are accessible after they are added to the
stream.
|
void |
deleteStream(DeleteStreamRequest deleteStreamRequest)
Deletes an Amazon Kinesis stream and all its shards and data.
|
void |
deleteStream(String streamName)
Simplified method form for invoking the DeleteStream operation.
|
DescribeStreamResult |
describeStream(DescribeStreamRequest describeStreamRequest)
Describes the specified Amazon Kinesis stream.
|
DescribeStreamResult |
describeStream(String streamName)
Simplified method form for invoking the DescribeStream operation.
|
DescribeStreamResult |
describeStream(String streamName,
Integer limit,
String exclusiveStartShardId)
Simplified method form for invoking the DescribeStream operation.
|
DescribeStreamResult |
describeStream(String streamName,
String exclusiveStartShardId)
Simplified method form for invoking the DescribeStream operation.
|
DisableEnhancedMonitoringResult |
disableEnhancedMonitoring(DisableEnhancedMonitoringRequest disableEnhancedMonitoringRequest)
Disables enhanced monitoring.
|
EnableEnhancedMonitoringResult |
enableEnhancedMonitoring(EnableEnhancedMonitoringRequest enableEnhancedMonitoringRequest)
Enables enhanced Amazon Kinesis stream monitoring for shard-level
metrics.
|
ResponseMetadata |
getCachedResponseMetadata(AmazonWebServiceRequest request)
Returns additional metadata for a previously executed successful request,
typically used for debugging issues where a service isn't acting as
expected.
|
GetRecordsResult |
getRecords(GetRecordsRequest getRecordsRequest)
Gets data records from an Amazon Kinesis stream's shard.
|
GetShardIteratorResult |
getShardIterator(GetShardIteratorRequest getShardIteratorRequest)
Gets an Amazon Kinesis shard iterator.
|
GetShardIteratorResult |
getShardIterator(String streamName,
String shardId,
String shardIteratorType)
Simplified method form for invoking the GetShardIterator operation.
|
GetShardIteratorResult |
getShardIterator(String streamName,
String shardId,
String shardIteratorType,
String startingSequenceNumber)
Simplified method form for invoking the GetShardIterator operation.
|
void |
increaseStreamRetentionPeriod(IncreaseStreamRetentionPeriodRequest increaseStreamRetentionPeriodRequest)
Increases the Amazon Kinesis stream's retention period, which is the
length of time data records are accessible after they are added to the
stream.
|
ListStreamsResult |
listStreams()
Simplified method form for invoking the ListStreams operation.
|
ListStreamsResult |
listStreams(Integer limit,
String exclusiveStartStreamName)
Simplified method form for invoking the ListStreams operation.
|
ListStreamsResult |
listStreams(ListStreamsRequest listStreamsRequest)
Lists your Amazon Kinesis streams.
|
ListStreamsResult |
listStreams(String exclusiveStartStreamName)
Simplified method form for invoking the ListStreams operation.
|
ListTagsForStreamResult |
listTagsForStream(ListTagsForStreamRequest listTagsForStreamRequest)
Lists the tags for the specified Amazon Kinesis stream.
|
void |
mergeShards(MergeShardsRequest mergeShardsRequest)
Merges two adjacent shards in an Amazon Kinesis stream and combines them
into a single shard to reduce the stream's capacity to ingest and
transport data.
|
void |
mergeShards(String streamName,
String shardToMerge,
String adjacentShardToMerge)
Simplified method form for invoking the MergeShards operation.
|
PutRecordResult |
putRecord(PutRecordRequest putRecordRequest)
Writes a single data record into an Amazon Kinesis stream.
|
PutRecordResult |
putRecord(String streamName,
ByteBuffer data,
String partitionKey)
Simplified method form for invoking the PutRecord operation.
|
PutRecordResult |
putRecord(String streamName,
ByteBuffer data,
String partitionKey,
String sequenceNumberForOrdering)
Simplified method form for invoking the PutRecord operation.
|
PutRecordsResult |
putRecords(PutRecordsRequest putRecordsRequest)
Writes multiple data records into an Amazon Kinesis stream in a single
call (also referred to as a
PutRecords request). |
void |
removeTagsFromStream(RemoveTagsFromStreamRequest removeTagsFromStreamRequest)
Removes tags from the specified Amazon Kinesis stream.
|
void |
setEndpoint(String endpoint)
Overrides the default endpoint for this client
("https://kinesis.us-east-1.amazonaws.com").
|
void |
setRegion(Region region)
An alternative to
setEndpoint(String), sets the
regional endpoint for this client's service calls. |
void |
shutdown()
Shuts down this client object, releasing any resources that might be held
open.
|
void |
splitShard(SplitShardRequest splitShardRequest)
Splits a shard into two new shards in the Amazon Kinesis stream to
increase the stream's capacity to ingest and transport data.
|
void |
splitShard(String streamName,
String shardToSplit,
String newStartingHashKey)
Simplified method form for invoking the SplitShard operation.
|
void setEndpoint(String endpoint)
Callers can pass in just the endpoint (ex:
"kinesis.us-east-1.amazonaws.com") or a full URL, including the protocol
(ex: "https://kinesis.us-east-1.amazonaws.com"). If the protocol is not
specified here, the default protocol from this client's
ClientConfiguration will be used, which by default is HTTPS.
For more information on using AWS regions with the AWS SDK for Java, and a complete list of all available endpoints for all AWS services, see: http://developer.amazonwebservices.com/connect/entry.jspa?externalID= 3912
This method is not threadsafe. An endpoint should be configured when the client is created and before any service requests are made. Changing it afterwards creates inevitable race conditions for any service requests in transit or retrying.
endpoint - The endpoint (ex: "kinesis.us-east-1.amazonaws.com") or a full
URL, including the protocol (ex:
"https://kinesis.us-east-1.amazonaws.com") of the region specific
AWS endpoint this client will communicate with.void setRegion(Region region)
setEndpoint(String), sets the
regional endpoint for this client's service calls. Callers can use this
method to control which AWS region they want to work with.
By default, all service endpoints in all regions use the https protocol.
To use http instead, specify it in the ClientConfiguration
supplied at construction.
This method is not threadsafe. A region should be configured when the client is created and before any service requests are made. Changing it afterwards creates inevitable race conditions for any service requests in transit or retrying.
region - The region this client will communicate with. See
Region.getRegion(com.amazonaws.regions.Regions) for
accessing a given region. Must not be null and must be a region
where the service is available.Region.getRegion(com.amazonaws.regions.Regions),
Region.createClient(Class,
com.amazonaws.auth.AWSCredentialsProvider, ClientConfiguration),
Region.isServiceSupported(String)void addTagsToStream(AddTagsToStreamRequest addTagsToStreamRequest)
Adds or updates tags for the specified Amazon Kinesis stream. Each stream can have up to 10 tags.
If tags have already been assigned to the stream,
AddTagsToStream overwrites any existing tags that correspond
to the specified tag keys.
addTagsToStreamRequest - Represents the input for AddTagsToStream.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.ResourceInUseException - The resource is not available for this operation. For successful
operation, the resource needs to be in the ACTIVE
state.InvalidArgumentException - A specified parameter exceeds its restrictions, is not supported,
or can't be used. For more information, see the returned message.LimitExceededException - The requested resource exceeds the maximum number allowed, or the
number of concurrent stream requests exceeds the maximum number
allowed (5).void createStream(CreateStreamRequest createStreamRequest)
Creates an Amazon Kinesis stream. A stream captures and transports data records that are continuously emitted from different data sources or producers. Scale-out within a stream is explicitly supported by means of shards, which are uniquely identified groups of data records in a stream.
You specify and control the number of shards that a stream is composed of. Each shard can support reads up to 5 transactions per second, up to a maximum data read total of 2 MB per second. Each shard can support writes up to 1,000 records per second, up to a maximum data write total of 1 MB per second. You can add shards to a stream if the amount of data input increases and you can remove shards if the amount of data input decreases.
The stream name identifies the stream. The name is scoped to the AWS account used by the application. It is also scoped by region. That is, two streams in two different accounts can have the same name, and two streams in the same account, but in two different regions, can have the same name.
CreateStream is an asynchronous operation. Upon receiving a
CreateStream request, Amazon Kinesis immediately returns and
sets the stream status to CREATING. After the stream is
created, Amazon Kinesis sets the stream status to ACTIVE.
You should perform read and write operations only on an
ACTIVE stream.
You receive a LimitExceededException when making a
CreateStream request if you try to do one of the following:
CREATING state at any
point in time.For the default shard limit for an AWS account, see Streams Limits in the Amazon Kinesis Streams Developer Guide. If you need to increase this limit, contact AWS Support.
You can use DescribeStream to check the stream status, which
is returned in StreamStatus.
CreateStream has a limit of 5 transactions per second per account.
createStreamRequest - Represents the input for CreateStream.ResourceInUseException - The resource is not available for this operation. For successful
operation, the resource needs to be in the ACTIVE
state.LimitExceededException - The requested resource exceeds the maximum number allowed, or the
number of concurrent stream requests exceeds the maximum number
allowed (5).InvalidArgumentException - A specified parameter exceeds its restrictions, is not supported,
or can't be used. For more information, see the returned message.void createStream(String streamName, Integer shardCount)
createStream(CreateStreamRequest)void decreaseStreamRetentionPeriod(DecreaseStreamRetentionPeriodRequest decreaseStreamRetentionPeriodRequest)
Decreases the Amazon Kinesis stream's retention period, which is the length of time data records are accessible after they are added to the stream. The minimum value of a stream's retention period is 24 hours.
This operation may result in lost data. For example, if the stream's retention period is 48 hours and is decreased to 24 hours, any data already in the stream that is older than 24 hours is inaccessible.
decreaseStreamRetentionPeriodRequest - Represents the input for DecreaseStreamRetentionPeriod.ResourceInUseException - The resource is not available for this operation. For successful
operation, the resource needs to be in the ACTIVE
state.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.LimitExceededException - The requested resource exceeds the maximum number allowed, or the
number of concurrent stream requests exceeds the maximum number
allowed (5).InvalidArgumentException - A specified parameter exceeds its restrictions, is not supported,
or can't be used. For more information, see the returned message.void deleteStream(DeleteStreamRequest deleteStreamRequest)
Deletes an Amazon Kinesis stream and all its shards and data. You must
shut down any applications that are operating on the stream before you
delete the stream. If an application attempts to operate on a deleted
stream, it will receive the exception
ResourceNotFoundException.
If the stream is in the ACTIVE state, you can delete it.
After a DeleteStream request, the specified stream is in the
DELETING state until Amazon Kinesis completes the deletion.
Note: Amazon Kinesis might continue to accept data read and write
operations, such as PutRecord, PutRecords, and
GetRecords, on a stream in the DELETING state until
the stream deletion is complete.
When you delete a stream, any shards in that stream are also deleted, and any tags are dissociated from the stream.
You can use the DescribeStream operation to check the state of the
stream, which is returned in StreamStatus.
DeleteStream has a limit of 5 transactions per second per account.
deleteStreamRequest - Represents the input for DeleteStream.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.LimitExceededException - The requested resource exceeds the maximum number allowed, or the
number of concurrent stream requests exceeds the maximum number
allowed (5).void deleteStream(String streamName)
deleteStream(DeleteStreamRequest)DescribeStreamResult describeStream(DescribeStreamRequest describeStreamRequest)
Describes the specified Amazon Kinesis stream.
The information about the stream includes its current status, its Amazon Resource Name (ARN), and an array of shard objects. For each shard object, there is information about the hash key and sequence number ranges that the shard spans, and the IDs of any earlier shards that played in a role in creating the shard. A sequence number is the identifier associated with every record ingested in the stream. The sequence number is assigned when a record is put into the stream.
You can limit the number of returned shards using the Limit
parameter. The number of shards in a stream may be too large to return
from a single call to DescribeStream. You can detect this by
using the HasMoreShards flag in the returned output.
HasMoreShards is set to true when there is more
data available.
DescribeStream is a paginated operation. If there are more
shards available, you can request them using the shard ID of the last
shard returned. Specify this ID in the ExclusiveStartShardId
parameter in a subsequent request to DescribeStream.
There are no guarantees about the chronological order shards returned in
DescribeStream results. If you want to process shards in
chronological order, use ParentShardId to track lineage to
the oldest shard.
DescribeStream has a limit of 10 transactions per second per account.
describeStreamRequest - Represents the input for DescribeStream.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.LimitExceededException - The requested resource exceeds the maximum number allowed, or the
number of concurrent stream requests exceeds the maximum number
allowed (5).DescribeStreamResult describeStream(String streamName)
DescribeStreamResult describeStream(String streamName, String exclusiveStartShardId)
DescribeStreamResult describeStream(String streamName, Integer limit, String exclusiveStartShardId)
DisableEnhancedMonitoringResult disableEnhancedMonitoring(DisableEnhancedMonitoringRequest disableEnhancedMonitoringRequest)
Disables enhanced monitoring.
disableEnhancedMonitoringRequest - Represents the input for DisableEnhancedMonitoring.InvalidArgumentException - A specified parameter exceeds its restrictions, is not supported,
or can't be used. For more information, see the returned message.LimitExceededException - The requested resource exceeds the maximum number allowed, or the
number of concurrent stream requests exceeds the maximum number
allowed (5).ResourceInUseException - The resource is not available for this operation. For successful
operation, the resource needs to be in the ACTIVE
state.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.EnableEnhancedMonitoringResult enableEnhancedMonitoring(EnableEnhancedMonitoringRequest enableEnhancedMonitoringRequest)
Enables enhanced Amazon Kinesis stream monitoring for shard-level metrics.
enableEnhancedMonitoringRequest - Represents the input for EnableEnhancedMonitoring.InvalidArgumentException - A specified parameter exceeds its restrictions, is not supported,
or can't be used. For more information, see the returned message.LimitExceededException - The requested resource exceeds the maximum number allowed, or the
number of concurrent stream requests exceeds the maximum number
allowed (5).ResourceInUseException - The resource is not available for this operation. For successful
operation, the resource needs to be in the ACTIVE
state.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.GetRecordsResult getRecords(GetRecordsRequest getRecordsRequest)
Gets data records from an Amazon Kinesis stream's shard.
Specify a shard iterator using the ShardIterator parameter.
The shard iterator specifies the position in the shard from which you
want to start reading data records sequentially. If there are no records
available in the portion of the shard that the iterator points to,
GetRecords returns an empty list. Note that it might take multiple
calls to get to a portion of the shard that contains records.
You can scale by provisioning multiple shards per stream while
considering service limits (for more information, see Streams Limits in the Amazon Kinesis Streams Developer
Guide). Your application should have one thread per shard, each
reading continuously from its stream. To read from a stream continually,
call GetRecords in a loop. Use GetShardIterator to get the
shard iterator to specify in the first GetRecords call.
GetRecords returns a new shard iterator in
NextShardIterator. Specify the shard iterator returned in
NextShardIterator in subsequent calls to GetRecords.
Note that if the shard has been closed, the shard iterator can't return
more data and GetRecords returns null in
NextShardIterator. You can terminate the loop when the shard
is closed, or when the shard iterator reaches the record with the
sequence number or other attribute that marks it as the last record to
process.
Each data record can be up to 1 MB in size, and each shard can read up to
2 MB per second. You can ensure that your calls don't exceed the maximum
supported size or throughput by using the Limit parameter to
specify the maximum number of records that GetRecords can return.
Consider your average record size when determining this limit.
The size of the data returned by GetRecords varies depending on
the utilization of the shard. The maximum size of data that
GetRecords can return is 10 MB. If a call returns this amount of
data, subsequent calls made within the next 5 seconds throw
ProvisionedThroughputExceededException. If there is
insufficient provisioned throughput on the shard, subsequent calls made
within the next 1 second throw
ProvisionedThroughputExceededException. Note that
GetRecords won't return any data when it throws an exception. For
this reason, we recommend that you wait one second between calls to
GetRecords; however, it's possible that the application will get
exceptions for longer than 1 second.
To detect whether the application is falling behind in processing, you
can use the MillisBehindLatest response attribute. You can
also monitor the stream using CloudWatch metrics and other mechanisms
(see Monitoring in the Amazon Kinesis Streams Developer Guide).
Each Amazon Kinesis record includes a value,
ApproximateArrivalTimestamp, that is set when a stream
successfully receives and stores a record. This is commonly referred to
as a server-side timestamp, whereas a client-side timestamp is set when a
data producer creates or sends the record to a stream (a data producer is
any data source putting data records into a stream, for example with
PutRecords). The timestamp has millisecond precision. There are no
guarantees about the timestamp accuracy, or that the timestamp is always
increasing. For example, records in a shard or across a stream might have
timestamps that are out of order.
getRecordsRequest - Represents the input for GetRecords.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.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 for the stream 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 Streams Limits in the Amazon Kinesis Streams Developer
Guide, and Error Retries and Exponential Backoff in AWS in the AWS
General Reference.ExpiredIteratorException - The provided iterator exceeds the maximum age allowed.GetShardIteratorResult getShardIterator(GetShardIteratorRequest getShardIteratorRequest)
Gets an Amazon Kinesis shard iterator. A shard iterator expires five minutes after it is returned to the requester.
A shard iterator specifies the shard position from which to start reading data records sequentially. The position is specified using the sequence number of a data record in a shard. A sequence number is the identifier associated with every record ingested in the stream, and is assigned when a record is put into the stream. Each stream has one or more shards.
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. In the request, you can specify the shard iterator
type AT_TIMESTAMP to read records from an arbitrary point in
time, TRIM_HORIZON to cause ShardIterator to
point to the last untrimmed record in the shard in the system (the oldest
data record in the shard), or LATEST so that you always read
the most recent data in the shard.
When you read repeatedly from a stream, use a GetShardIterator
request to get the first shard iterator for use in your first
GetRecords request and for subsequent reads use the shard iterator
returned by the GetRecords request in
NextShardIterator. 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, and Streams Limits in the Amazon Kinesis Streams Developer Guide.
If the shard is closed, GetShardIterator returns a valid iterator for the last sequence number of the shard. Note that a shard can be closed as a result of using SplitShard or MergeShards.
GetShardIterator has a limit of 5 transactions per second per account per open shard.
getShardIteratorRequest - Represents the input for GetShardIterator.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.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 for the stream 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 Streams Limits in the Amazon Kinesis Streams Developer
Guide, and Error Retries and Exponential Backoff in AWS in the AWS
General Reference.GetShardIteratorResult getShardIterator(String streamName, String shardId, String shardIteratorType)
GetShardIteratorResult getShardIterator(String streamName, String shardId, String shardIteratorType, String startingSequenceNumber)
void increaseStreamRetentionPeriod(IncreaseStreamRetentionPeriodRequest increaseStreamRetentionPeriodRequest)
Increases the Amazon Kinesis stream's retention period, which is the length of time data records are accessible after they are added to the stream. The maximum value of a stream's retention period is 168 hours (7 days).
Upon choosing a longer stream retention period, this operation will increase the time period records are accessible that have not yet expired. However, it will not make previous data that has expired (older than the stream's previous retention period) accessible after the operation has been called. For example, if a stream's retention period is set to 24 hours and is increased to 168 hours, any data that is older than 24 hours will remain inaccessible to consumer applications.
increaseStreamRetentionPeriodRequest - Represents the input for IncreaseStreamRetentionPeriod.ResourceInUseException - The resource is not available for this operation. For successful
operation, the resource needs to be in the ACTIVE
state.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.LimitExceededException - The requested resource exceeds the maximum number allowed, or the
number of concurrent stream requests exceeds the maximum number
allowed (5).InvalidArgumentException - A specified parameter exceeds its restrictions, is not supported,
or can't be used. For more information, see the returned message.ListStreamsResult listStreams(ListStreamsRequest listStreamsRequest)
Lists your Amazon Kinesis streams.
The number of streams may be too large to return from a single call to
ListStreams. You can limit the number of returned streams
using the Limit parameter. If you do not specify a value for
the Limit parameter, Amazon Kinesis uses the default limit,
which is currently 10.
You can detect if there are more streams available to list by using the
HasMoreStreams flag from the returned output. If there are
more streams available, you can request more streams by using the name of
the last stream returned by the ListStreams request in the
ExclusiveStartStreamName parameter in a subsequent request
to ListStreams. The group of stream names returned by the
subsequent request is then added to the list. You can continue this
process until all the stream names have been collected in the list.
ListStreams has a limit of 5 transactions per second per account.
listStreamsRequest - Represents the input for ListStreams.LimitExceededException - The requested resource exceeds the maximum number allowed, or the
number of concurrent stream requests exceeds the maximum number
allowed (5).ListStreamsResult listStreams()
listStreams(ListStreamsRequest)ListStreamsResult listStreams(String exclusiveStartStreamName)
listStreams(ListStreamsRequest)ListStreamsResult listStreams(Integer limit, String exclusiveStartStreamName)
listStreams(ListStreamsRequest)ListTagsForStreamResult listTagsForStream(ListTagsForStreamRequest listTagsForStreamRequest)
Lists the tags for the specified Amazon Kinesis stream.
listTagsForStreamRequest - Represents the input for ListTagsForStream.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.InvalidArgumentException - A specified parameter exceeds its restrictions, is not supported,
or can't be used. For more information, see the returned message.LimitExceededException - The requested resource exceeds the maximum number allowed, or the
number of concurrent stream requests exceeds the maximum number
allowed (5).void mergeShards(MergeShardsRequest mergeShardsRequest)
Merges two adjacent shards in an Amazon Kinesis stream and combines them into a single shard to reduce the stream's capacity to ingest and transport data. 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.
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 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 DescribeStream to check the state of the stream, which
is returned in StreamStatus.
MergeShards is an asynchronous operation. Upon receiving a
MergeShards request, Amazon Kinesis immediately returns a
response and sets the StreamStatus to UPDATING.
After the operation is completed, Amazon Kinesis sets the
StreamStatus to ACTIVE. Read and write
operations continue to work while the stream is in the
UPDATING state.
You use DescribeStream 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 will receive a LimitExceededException
.
MergeShards has limit of 5 transactions per second per
account.
mergeShardsRequest - Represents the input for MergeShards.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.ResourceInUseException - The resource is not available for this operation. For successful
operation, the resource needs to be in the ACTIVE
state.InvalidArgumentException - A specified parameter exceeds its restrictions, is not supported,
or can't be used. For more information, see the returned message.LimitExceededException - The requested resource exceeds the maximum number allowed, or the
number of concurrent stream requests exceeds the maximum number
allowed (5).void mergeShards(String streamName, String shardToMerge, String adjacentShardToMerge)
mergeShards(MergeShardsRequest)PutRecordResult putRecord(PutRecordRequest putRecordRequest)
Writes a single data record into an Amazon Kinesis stream. Call
PutRecord to send data into the stream for real-time
ingestion and subsequent processing, one record at a time. Each shard can
support writes up to 1,000 records per second, up to a maximum data write
total of 1 MB per second.
You must specify the name of the stream that captures, stores, and transports the data; a partition key; and the data blob itself.
The data blob can be any type of data; for example, a segment from a log file, geographic/location data, website clickstream data, and so on.
The partition key is used by Amazon Kinesis to distribute data across shards. Amazon Kinesis segregates the data records that belong to a stream into multiple shards, using the partition key associated with each data record to determine which shard a given data record belongs to.
Partition keys are Unicode strings, with a maximum length limit of 256
characters for each key. An MD5 hash function is used to map partition
keys to 128-bit integer values and to map associated data records to
shards using the hash key ranges of the shards. You can override hashing
the partition key to determine the shard by explicitly specifying a hash
value using the ExplicitHashKey parameter. For more
information, see Adding Data to a Stream in the Amazon Kinesis Streams Developer
Guide.
PutRecord returns the shard ID of where the data record was
placed and the sequence number that was assigned to the data record.
Sequence numbers increase over time and are specific to a shard within a
stream, not across all shards within a stream. To guarantee strictly
increasing ordering, write serially to a shard and use the
SequenceNumberForOrdering parameter. For more information,
see Adding Data to a Stream in the Amazon Kinesis Streams Developer
Guide.
If a PutRecord request cannot be processed because of
insufficient provisioned throughput on the shard involved in the request,
PutRecord throws
ProvisionedThroughputExceededException.
Data records are accessible for only 24 hours from the time that they are added to a stream.
putRecordRequest - Represents the input for PutRecord.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.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 for the stream 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 Streams Limits in the Amazon Kinesis Streams Developer
Guide, and Error Retries and Exponential Backoff in AWS in the AWS
General Reference.PutRecordResult putRecord(String streamName, ByteBuffer data, String partitionKey)
putRecord(PutRecordRequest)PutRecordResult putRecord(String streamName, ByteBuffer data, String partitionKey, String sequenceNumberForOrdering)
putRecord(PutRecordRequest)PutRecordsResult putRecords(PutRecordsRequest putRecordsRequest)
Writes multiple data records into an Amazon Kinesis stream in a single
call (also referred to as a PutRecords request). Use this
operation to send data into the stream for data ingestion and processing.
Each PutRecords request can support up to 500 records. Each
record in the request can be as large as 1 MB, up to a limit of 5 MB for
the entire request, including partition keys. Each shard can support
writes up to 1,000 records per second, up to a maximum data write total
of 1 MB per second.
You must specify the name of the stream that captures, stores, and
transports the data; and an array of request Records, with
each record in the array requiring a partition key and data blob. The
record size limit applies to the total size of the partition key and data
blob.
The data blob can be any type of data; for example, a segment from a log file, geographic/location data, website clickstream data, and so on.
The partition key is used by Amazon Kinesis as input to a hash function that maps the partition key and associated data to a specific shard. An MD5 hash function is used to map partition keys to 128-bit integer values and to map associated data records to shards. As a result of this hashing mechanism, all data records with the same partition key map to the same shard within the stream. For more information, see Adding Data to a Stream in the Amazon Kinesis Streams Developer Guide.
Each record in the Records array may include an optional
parameter, ExplicitHashKey, which overrides the partition
key to shard mapping. This parameter allows a data producer to determine
explicitly the shard where the record is stored. For more information,
see Adding Multiple Records with PutRecords in the Amazon Kinesis
Streams Developer Guide.
The PutRecords response includes an array of response
Records. Each record in the response array directly
correlates with a record in the request array using natural ordering,
from the top to the bottom of the request and response. The response
Records array always includes the same number of records as
the request array.
The response Records array includes both successfully and
unsuccessfully processed records. Amazon Kinesis attempts to process all
records in each PutRecords request. A single record failure
does not stop the processing of subsequent records.
A successfully-processed record includes ShardId and
SequenceNumber values. The ShardId parameter
identifies the shard in the stream where the record is stored. The
SequenceNumber parameter is an identifier assigned to the
put record, unique to all records in the stream.
An unsuccessfully-processed record includes ErrorCode and
ErrorMessage values. ErrorCode reflects the
type of error and can be one of the following values:
ProvisionedThroughputExceededException or
InternalFailure. ErrorMessage provides more
detailed information about the
ProvisionedThroughputExceededException exception including
the account ID, stream name, and shard ID of the record that was
throttled. For more information about partially successful responses, see
Adding Multiple Records with PutRecords in the Amazon Kinesis
Streams Developer Guide.
By default, data records are accessible for only 24 hours from the time that they are added to an Amazon Kinesis stream. This retention period can be modified using the DecreaseStreamRetentionPeriod and IncreaseStreamRetentionPeriod operations.
putRecordsRequest - A PutRecords request.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.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 for the stream 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 Streams Limits in the Amazon Kinesis Streams Developer
Guide, and Error Retries and Exponential Backoff in AWS in the AWS
General Reference.void removeTagsFromStream(RemoveTagsFromStreamRequest removeTagsFromStreamRequest)
Removes tags from the specified Amazon Kinesis stream. Removed tags are deleted and cannot be recovered after this operation successfully completes.
If you specify a tag that does not exist, it is ignored.
removeTagsFromStreamRequest - Represents the input for RemoveTagsFromStream.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.ResourceInUseException - The resource is not available for this operation. For successful
operation, the resource needs to be in the ACTIVE
state.InvalidArgumentException - A specified parameter exceeds its restrictions, is not supported,
or can't be used. For more information, see the returned message.LimitExceededException - The requested resource exceeds the maximum number allowed, or the
number of concurrent stream requests exceeds the maximum number
allowed (5).void splitShard(SplitShardRequest splitShardRequest)
Splits a shard into two new shards in the Amazon Kinesis stream to
increase the stream's capacity to ingest and transport data.
SplitShard is called when there is a need to increase the
overall capacity of a stream because of an expected increase in the
volume of data records being ingested.
You can also use SplitShard when a shard appears to be
approaching its maximum utilization; for example, the producers sending
data into the specific shard are suddenly sending more than previously
anticipated. You can also call SplitShard to increase stream
capacity, so that more Amazon Kinesis applications can simultaneously
read data from the stream for real-time processing.
You must specify the shard to be split and the new hash key, which is the position in the shard where the shard gets split in two. In many cases, the new hash key might simply be the average of the beginning and ending hash key, but it can be any hash key value in the range being mapped into the shard. For more information about splitting shards, see Split a Shard in the Amazon Kinesis Streams Developer Guide.
You can use DescribeStream to determine the shard ID and hash key
values for the ShardToSplit and
NewStartingHashKey parameters that are specified in the
SplitShard request.
SplitShard is an asynchronous operation. Upon receiving a
SplitShard request, Amazon Kinesis immediately returns a
response and sets the stream status to UPDATING. After the
operation is completed, Amazon Kinesis sets the stream status to
ACTIVE. Read and write operations continue to work while the
stream is in the UPDATING state.
You can use DescribeStream to check the status of the
stream, which is returned in StreamStatus. If the stream is
in the ACTIVE state, you can call SplitShard.
If a stream is in CREATING or UPDATING or
DELETING states, DescribeStream returns a
ResourceInUseException.
If the specified stream does not exist, DescribeStream
returns a ResourceNotFoundException. If you try to create
more shards than are authorized for your account, you receive a
LimitExceededException.
For the default shard limit for an AWS account, see Streams Limits in the Amazon Kinesis Streams Developer Guide. If you need to increase this limit, contact AWS Support.
If you try to operate on too many streams simultaneously using
CreateStream, DeleteStream, MergeShards, and/or
SplitShard, you receive a LimitExceededException.
SplitShard has limit of 5 transactions per second per
account.
splitShardRequest - Represents the input for SplitShard.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.ResourceInUseException - The resource is not available for this operation. For successful
operation, the resource needs to be in the ACTIVE
state.InvalidArgumentException - A specified parameter exceeds its restrictions, is not supported,
or can't be used. For more information, see the returned message.LimitExceededException - The requested resource exceeds the maximum number allowed, or the
number of concurrent stream requests exceeds the maximum number
allowed (5).void splitShard(String streamName, String shardToSplit, String newStartingHashKey)
splitShard(SplitShardRequest)void shutdown()
ResponseMetadata getCachedResponseMetadata(AmazonWebServiceRequest request)
Response metadata is only cached for a limited period of time, so if you need to access this extra diagnostic information for an executed request, you should use this method to retrieve it as soon as possible after executing a request.
request - The originally executed request.Copyright © 2016. All rights reserved.