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/*
* Copyright 2011-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"). You may not
* use this file except in compliance with the License. A copy of the License is
* located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed on
* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
package com.amazonaws.services.dynamodbv2;
import com.amazonaws.*;
import com.amazonaws.regions.*;
import com.amazonaws.services.dynamodbv2.model.*;
/**
* Interface for accessing Amazon DynamoDB Streams.
*
* Amazon DynamoDB
*
* Amazon DynamoDB Streams provides API actions for accessing streams and
* processing stream records. To learn more about application development with
* Streams, see Capturing Table Activity with DynamoDB Streams in the Amazon DynamoDB
* Developer Guide.
*
*
* The following are short descriptions of each low-level DynamoDB Streams
* action:
*
*
* -
*
* DescribeStream - Returns detailed information about a particular
* stream.
*
*
* -
*
* GetRecords - Retrieves the stream records from within a shard.
*
*
* -
*
* GetShardIterator - Returns information on how to retrieve the streams
* record from a shard with a given shard ID.
*
*
* -
*
* ListStreams - Returns a list of all the streams associated with the
* current AWS account and endpoint.
*
*
*
*/
public interface AmazonDynamoDBStreams {
/**
* The region metadata service name for computing region endpoints. You can
* use this value to retrieve metadata (such as supported regions) of the
* service.
*
* @see RegionUtils#getRegionsForService(String)
*/
String ENDPOINT_PREFIX = "streams.dynamodb";
/**
* Overrides the default endpoint for this client
* ("https://streams.dynamodb.us-east-1.amazonaws.com"). Callers can use
* this method to control which AWS region they want to work with.
*
* Callers can pass in just the endpoint (ex:
* "streams.dynamodb.us-east-1.amazonaws.com") or a full URL, including the
* protocol (ex: "https://streams.dynamodb.us-east-1.amazonaws.com"). If the
* protocol is not specified here, the default protocol from this client's
* {@link 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.
*
* @param endpoint
* The endpoint (ex: "streams.dynamodb.us-east-1.amazonaws.com") or a
* full URL, including the protocol (ex:
* "https://streams.dynamodb.us-east-1.amazonaws.com") of the region
* specific AWS endpoint this client will communicate with.
*/
void setEndpoint(String endpoint);
/**
* An alternative to {@link AmazonDynamoDBStreams#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 {@link 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.
*
* @param region
* The region this client will communicate with. See
* {@link 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.
*
* @see Region#getRegion(com.amazonaws.regions.Regions)
* @see Region#createClient(Class,
* com.amazonaws.auth.AWSCredentialsProvider, ClientConfiguration)
* @see Region#isServiceSupported(String)
*/
void setRegion(Region region);
/**
*
* Returns information about a stream, including the current status of the
* stream, its Amazon Resource Name (ARN), the composition of its shards,
* and its corresponding DynamoDB table.
*
*
*
* You can call DescribeStream at a maximum rate of 10 times per
* second.
*
*
*
* Each shard in the stream has a SequenceNumberRange
* associated with it. If the SequenceNumberRange has a
* StartingSequenceNumber but no
* EndingSequenceNumber, then the shard is still open (able to
* receive more stream records). If both StartingSequenceNumber
* and EndingSequenceNumber are present, then that shard is
* closed and can no longer receive more data.
*
*
* @param describeStreamRequest
* Represents the input of a DescribeStream operation.
* @return Result of the DescribeStream operation returned by the service.
* @throws ResourceNotFoundException
* The operation tried to access a nonexistent stream.
* @throws InternalServerErrorException
* An error occurred on the server side.
* @sample AmazonDynamoDBStreams.DescribeStream
*/
DescribeStreamResult describeStream(
DescribeStreamRequest describeStreamRequest);
/**
*
* Retrieves the stream records from a given 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 stream records sequentially. If there are no stream
* 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 stream
* records.
*
*
*
* GetRecords can retrieve a maximum of 1 MB of data or 1000
* stream records, whichever comes first.
*
*
*
* @param getRecordsRequest
* Represents the input of a GetRecords operation.
* @return Result of the GetRecords operation returned by the service.
* @throws ResourceNotFoundException
* The operation tried to access a nonexistent stream.
* @throws LimitExceededException
* Your request rate is too high. The AWS SDKs for DynamoDB
* automatically retry requests that receive this exception. Your
* request is eventually successful, unless your retry queue is too
* large to finish. Reduce the frequency of requests and use
* exponential backoff. For more information, go to Error Retries and Exponential Backoff in the Amazon
* DynamoDB Developer Guide.
* @throws InternalServerErrorException
* An error occurred on the server side.
* @throws ExpiredIteratorException
* The shard iterator has expired and can no longer be used to
* retrieve stream records. A shard iterator expires 15 minutes
* after it is retrieved using the GetShardIterator action.
* @throws TrimmedDataAccessException
* The operation attempted to read past the oldest stream record in
* a shard.
*
* In DynamoDB Streams, there is a 24 hour limit on data retention.
* Stream records whose age exceeds this limit are subject to
* removal (trimming) from the stream. You might receive a
* TrimmedDataAccessException if:
*
*
* -
*
* You request a shard iterator with a sequence number older than
* the trim point (24 hours).
*
*
* -
*
* You obtain a shard iterator, but before you use the iterator in a
* GetRecords request, a stream record in the shard exceeds
* the 24 hour period and is trimmed. This causes the iterator to
* access a record that no longer exists.
*
*
* @sample AmazonDynamoDBStreams.GetRecords
*/
GetRecordsResult getRecords(GetRecordsRequest getRecordsRequest);
/**
*
* Returns a shard iterator. A shard iterator provides information about how
* to retrieve the stream records from within a shard. Use the shard
* iterator in a subsequent GetRecords request to read the
* stream records from the shard.
*
*
*
* A shard iterator expires 15 minutes after it is returned to the
* requester.
*
*
*
* @param getShardIteratorRequest
* Represents the input of a GetShardIterator operation.
* @return Result of the GetShardIterator operation returned by the service.
* @throws ResourceNotFoundException
* The operation tried to access a nonexistent stream.
* @throws InternalServerErrorException
* An error occurred on the server side.
* @throws TrimmedDataAccessException
* The operation attempted to read past the oldest stream record in
* a shard.
*
* In DynamoDB Streams, there is a 24 hour limit on data retention.
* Stream records whose age exceeds this limit are subject to
* removal (trimming) from the stream. You might receive a
* TrimmedDataAccessException if:
*
*
* -
*
* You request a shard iterator with a sequence number older than
* the trim point (24 hours).
*
*
* -
*
* You obtain a shard iterator, but before you use the iterator in a
* GetRecords request, a stream record in the shard exceeds
* the 24 hour period and is trimmed. This causes the iterator to
* access a record that no longer exists.
*
*
* @sample AmazonDynamoDBStreams.GetShardIterator
*/
GetShardIteratorResult getShardIterator(
GetShardIteratorRequest getShardIteratorRequest);
/**
*
* Returns an array of stream ARNs associated with the current account and
* endpoint. If the TableName parameter is present, then
* ListStreams will return only the streams ARNs for that table.
*
*
*
* You can call ListStreams at a maximum rate of 5 times per second.
*
*
*
* @param listStreamsRequest
* Represents the input of a ListStreams operation.
* @return Result of the ListStreams operation returned by the service.
* @throws ResourceNotFoundException
* The operation tried to access a nonexistent stream.
* @throws InternalServerErrorException
* An error occurred on the server side.
* @sample AmazonDynamoDBStreams.ListStreams
*/
ListStreamsResult listStreams(ListStreamsRequest listStreamsRequest);
/**
* Shuts down this client object, releasing any resources that might be held
* open. This is an optional method, and callers are not expected to call
* it, but can if they want to explicitly release any open resources. Once a
* client has been shutdown, it should not be used to make any more
* requests.
*/
void shutdown();
/**
* Returns additional metadata for a previously executed successful request,
* typically used for debugging issues where a service isn't acting as
* expected. This data isn't considered part of the result data returned by
* an operation, so it's available through this separate, diagnostic
* interface.
*
* 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.
*
* @param request
* The originally executed request.
*
* @return The response metadata for the specified request, or null if none
* is available.
*/
ResponseMetadata getCachedResponseMetadata(AmazonWebServiceRequest request);
}