Table of Contents
DynamoDBStreams.Client¶A low-level client representing Amazon DynamoDB Streams:
client = session.create_client('dynamodbstreams')
These are the available methods:
can_paginate()describe_stream()generate_presigned_url()get_paginator()get_records()get_shard_iterator()get_waiter()list_streams()can_paginate(operation_name)¶Check if an operation can be paginated.
| Parameters: | operation_name (string) – The operation name. This is the same name
as the method name on the client. For example, if the
method name is create_foo, and you’d normally invoke the
operation as client.create_foo(**kwargs), if the
create_foo operation can be paginated, you can use the
call client.get_paginator("create_foo"). |
|---|---|
| Returns: | True if the operation can be paginated,
False otherwise. |
describe_stream(**kwargs)¶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.
Note
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.
See also: AWS API Documentation
Request Syntax
response = client.describe_stream(
StreamArn='string',
Limit=123,
ExclusiveStartShardId='string'
)
| Parameters: |
|
|---|---|
| Return type: | dict |
| Returns: | Response Syntax {
'StreamDescription': {
'StreamArn': 'string',
'StreamLabel': 'string',
'StreamStatus': 'ENABLING'|'ENABLED'|'DISABLING'|'DISABLED',
'StreamViewType': 'NEW_IMAGE'|'OLD_IMAGE'|'NEW_AND_OLD_IMAGES'|'KEYS_ONLY',
'CreationRequestDateTime': datetime(2015, 1, 1),
'TableName': 'string',
'KeySchema': [
{
'AttributeName': 'string',
'KeyType': 'HASH'|'RANGE'
},
],
'Shards': [
{
'ShardId': 'string',
'SequenceNumberRange': {
'StartingSequenceNumber': 'string',
'EndingSequenceNumber': 'string'
},
'ParentShardId': 'string'
},
],
'LastEvaluatedShardId': 'string'
}
}
Response Structure
|
Examples
The following example describes a stream with a given stream ARN.
response = client.describe_stream(
StreamArn='arn:aws:dynamodb:us-west-2:111122223333:table/Forum/stream/2015-05-20T20:51:10.252',
)
print(response)
Expected Output:
{
'StreamDescription': {
'CreationRequestDateTime': datetime(2015, 5, 20, 13, 51, 10, 2, 140, -1),
'KeySchema': [
{
'AttributeName': 'ForumName',
'KeyType': 'HASH',
},
{
'AttributeName': 'Subject',
'KeyType': 'RANGE',
},
],
'Shards': [
{
'SequenceNumberRange': {
'EndingSequenceNumber': '20500000000000000910398',
'StartingSequenceNumber': '20500000000000000910398',
},
'ShardId': 'shardId-00000001414562045508-2bac9cd2',
},
{
'ParentShardId': 'shardId-00000001414562045508-2bac9cd2',
'SequenceNumberRange': {
'EndingSequenceNumber': '820400000000000001192334',
'StartingSequenceNumber': '820400000000000001192334',
},
'ShardId': 'shardId-00000001414576573621-f55eea83',
},
{
'ParentShardId': 'shardId-00000001414576573621-f55eea83',
'SequenceNumberRange': {
'EndingSequenceNumber': '1683700000000000001135967',
'StartingSequenceNumber': '1683700000000000001135967',
},
'ShardId': 'shardId-00000001414592258131-674fd923',
},
{
'ParentShardId': 'shardId-00000001414592258131-674fd923',
'SequenceNumberRange': {
'StartingSequenceNumber': '2574600000000000000935255',
},
'ShardId': 'shardId-00000001414608446368-3a1afbaf',
},
],
'StreamArn': 'arn:aws:dynamodb:us-west-2:111122223333:table/Forum/stream/2015-05-20T20:51:10.252',
'StreamLabel': '2015-05-20T20:51:10.252',
'StreamStatus': 'ENABLED',
'StreamViewType': 'NEW_AND_OLD_IMAGES',
'TableName': 'Forum',
},
'ResponseMetadata': {
'...': '...',
},
}
generate_presigned_url(ClientMethod, Params=None, ExpiresIn=3600, HttpMethod=None)¶Generate a presigned url given a client, its method, and arguments
| Parameters: |
|
|---|---|
| Returns: | The presigned url |
get_paginator(operation_name)¶Create a paginator for an operation.
| Parameters: | operation_name (string) – The operation name. This is the same name
as the method name on the client. For example, if the
method name is create_foo, and you’d normally invoke the
operation as client.create_foo(**kwargs), if the
create_foo operation can be paginated, you can use the
call client.get_paginator("create_foo"). |
|---|---|
| Raises: | OperationNotPageableError – Raised if the operation is not
pageable. You can use the client.can_paginate method to
check if an operation is pageable. |
| Return type: | L{botocore.paginate.Paginator} |
| Returns: | A paginator object. |
get_records(**kwargs)¶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.
Note
GetRecords can retrieve a maximum of 1 MB of data or 1000 stream records, whichever comes first.
See also: AWS API Documentation
Request Syntax
response = client.get_records(
ShardIterator='string',
Limit=123
)
| Parameters: |
|
|---|---|
| Return type: | dict |
| Returns: | Response Syntax {
'Records': [
{
'eventID': 'string',
'eventName': 'INSERT'|'MODIFY'|'REMOVE',
'eventVersion': 'string',
'eventSource': 'string',
'awsRegion': 'string',
'dynamodb': {
'ApproximateCreationDateTime': datetime(2015, 1, 1),
'Keys': {
'string': {
'S': 'string',
'N': 'string',
'B': b'bytes',
'SS': [
'string',
],
'NS': [
'string',
],
'BS': [
b'bytes',
],
'M': {
'string': {'... recursive ...'}
},
'L': [
{'... recursive ...'},
],
'NULL': True|False,
'BOOL': True|False
}
},
'NewImage': {
'string': {
'S': 'string',
'N': 'string',
'B': b'bytes',
'SS': [
'string',
],
'NS': [
'string',
],
'BS': [
b'bytes',
],
'M': {
'string': {'... recursive ...'}
},
'L': [
{'... recursive ...'},
],
'NULL': True|False,
'BOOL': True|False
}
},
'OldImage': {
'string': {
'S': 'string',
'N': 'string',
'B': b'bytes',
'SS': [
'string',
],
'NS': [
'string',
],
'BS': [
b'bytes',
],
'M': {
'string': {'... recursive ...'}
},
'L': [
{'... recursive ...'},
],
'NULL': True|False,
'BOOL': True|False
}
},
'SequenceNumber': 'string',
'SizeBytes': 123,
'StreamViewType': 'NEW_IMAGE'|'OLD_IMAGE'|'NEW_AND_OLD_IMAGES'|'KEYS_ONLY'
},
'userIdentity': {
'PrincipalId': 'string',
'Type': 'string'
}
},
],
'NextShardIterator': 'string'
}
Response Structure
|
Examples
The following example retrieves all the stream records from a shard.
response = client.get_records(
ShardIterator='arn:aws:dynamodb:us-west-2:111122223333:table/Forum/stream/2015-05-20T20:51:10.252|1|AAAAAAAAAAEvJp6D+zaQ... <remaining characters omitted> ...',
)
print(response)
Expected Output:
{
'NextShardIterator': 'arn:aws:dynamodb:us-west-2:111122223333:table/Forum/stream/2015-05-20T20:51:10.252|1|AAAAAAAAAAGQBYshYDEe ... <remaining characters omitted> ...',
'Records': [
{
'awsRegion': 'us-west-2',
'dynamodb': {
'ApproximateCreationDateTime': datetime(2016, 6, 1, 18, 41, 0, 2, 153, 0),
'Keys': {
'ForumName': {
'S': 'DynamoDB',
},
'Subject': {
'S': 'DynamoDB Thread 3',
},
},
'SequenceNumber': '300000000000000499659',
'SizeBytes': 41,
'StreamViewType': 'KEYS_ONLY',
},
'eventID': 'e2fd9c34eff2d779b297b26f5fef4206',
'eventName': 'INSERT',
'eventSource': 'aws:dynamodb',
'eventVersion': '1.0',
},
{
'awsRegion': 'us-west-2',
'dynamodb': {
'ApproximateCreationDateTime': datetime(2016, 6, 1, 18, 21, 10, 2, 153, 0),
'Keys': {
'ForumName': {
'S': 'DynamoDB',
},
'Subject': {
'S': 'DynamoDB Thread 1',
},
},
'SequenceNumber': '400000000000000499660',
'SizeBytes': 41,
'StreamViewType': 'KEYS_ONLY',
},
'eventID': '4b25bd0da9a181a155114127e4837252',
'eventName': 'MODIFY',
'eventSource': 'aws:dynamodb',
'eventVersion': '1.0',
},
{
'awsRegion': 'us-west-2',
'dynamodb': {
'ApproximateCreationDateTime': datetime(2016, 6, 1, 18, 41, 0, 2, 153, 0),
'Keys': {
'ForumName': {
'S': 'DynamoDB',
},
'Subject': {
'S': 'DynamoDB Thread 2',
},
},
'SequenceNumber': '500000000000000499661',
'SizeBytes': 41,
'StreamViewType': 'KEYS_ONLY',
},
'eventID': '740280c73a3df7842edab3548a1b08ad',
'eventName': 'REMOVE',
'eventSource': 'aws:dynamodb',
'eventVersion': '1.0',
},
],
'ResponseMetadata': {
'...': '...',
},
}
get_shard_iterator(**kwargs)¶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.
Note
A shard iterator expires 15 minutes after it is returned to the requester.
See also: AWS API Documentation
Request Syntax
response = client.get_shard_iterator(
StreamArn='string',
ShardId='string',
ShardIteratorType='TRIM_HORIZON'|'LATEST'|'AT_SEQUENCE_NUMBER'|'AFTER_SEQUENCE_NUMBER',
SequenceNumber='string'
)
| Parameters: |
|
|---|---|
| Return type: | dict |
| Returns: | Response Syntax {
'ShardIterator': 'string'
}
Response Structure
|
Examples
The following example returns a shard iterator for the provided stream ARN and shard ID.
response = client.get_shard_iterator(
ShardId='00000001414576573621-f55eea83',
ShardIteratorType='TRIM_HORIZON',
StreamArn='arn:aws:dynamodb:us-west-2:111122223333:table/Forum/stream/2015-05-20T20:51:10.252',
)
print(response)
Expected Output:
{
'ShardIterator': 'arn:aws:dynamodb:us-west-2:111122223333:table/Forum/stream/2015-05-20T20:51:10.252|1|AAAAAAAAAAEvJp6D+zaQ... <remaining characters omitted> ...',
'ResponseMetadata': {
'...': '...',
},
}
get_waiter(waiter_name)¶list_streams(**kwargs)¶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.
Note
You can call ListStreams at a maximum rate of 5 times per second.
See also: AWS API Documentation
Request Syntax
response = client.list_streams(
TableName='string',
Limit=123,
ExclusiveStartStreamArn='string'
)
| Parameters: |
|
|---|---|
| Return type: | dict |
| Returns: | Response Syntax {
'Streams': [
{
'StreamArn': 'string',
'TableName': 'string',
'StreamLabel': 'string'
},
],
'LastEvaluatedStreamArn': 'string'
}
Response Structure
|
Examples
The following example lists all of the stream ARNs.
response = client.list_streams(
)
print(response)
Expected Output:
{
'Streams': [
{
'StreamArn': 'arn:aws:dynamodb:us-wesst-2:111122223333:table/Forum/stream/2015-05-20T20:51:10.252',
'StreamLabel': '2015-05-20T20:51:10.252',
'TableName': 'Forum',
},
{
'StreamArn': 'arn:aws:dynamodb:us-west-2:111122223333:table/Forum/stream/2015-05-20T20:50:02.714',
'StreamLabel': '2015-05-20T20:50:02.714',
'TableName': 'Forum',
},
{
'StreamArn': 'arn:aws:dynamodb:us-west-2:111122223333:table/Forum/stream/2015-05-19T23:03:50.641',
'StreamLabel': '2015-05-19T23:03:50.641',
'TableName': 'Forum',
},
],
'ResponseMetadata': {
'...': '...',
},
}
The available paginators are: