DynamoDBStreams

Client

class DynamoDBStreams.Client

A low-level client representing Amazon DynamoDB Streams:

client = session.create_client('dynamodbstreams')

These are the available methods:

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
  • StreamArn (string) --

    [REQUIRED]

    The Amazon Resource Name (ARN) for the stream.

  • Limit (integer) -- The maximum number of shard objects to return. The upper limit is 100.
  • ExclusiveStartShardId (string) -- The shard ID of the first item that this operation will evaluate. Use the value that was returned for LastEvaluatedShardId in the previous operation.
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

  • (dict) --

    Represents the output of a DescribeStream operation.

    • StreamDescription (dict) --

      A complete description of the stream, including its creation date and time, the DynamoDB table associated with the stream, the shard IDs within the stream, and the beginning and ending sequence numbers of stream records within the shards.

      • StreamArn (string) --

        The Amazon Resource Name (ARN) for the stream.

      • StreamLabel (string) --

        A timestamp, in ISO 8601 format, for this stream.

        Note that LatestStreamLabel is not a unique identifier for the stream, because it is possible that a stream from another table might have the same timestamp. However, the combination of the following three elements is guaranteed to be unique:

        • the AWS customer ID.
        • the table name
        • the StreamLabel
      • StreamStatus (string) --

        Indicates the current status of the stream:

        • ENABLING - Streams is currently being enabled on the DynamoDB table.
        • ENABLED - the stream is enabled.
        • DISABLING - Streams is currently being disabled on the DynamoDB table.
        • DISABLED - the stream is disabled.
      • StreamViewType (string) --

        Indicates the format of the records within this stream:

        • KEYS_ONLY - only the key attributes of items that were modified in the DynamoDB table.
        • NEW_IMAGE - entire items from the table, as they appeared after they were modified.
        • OLD_IMAGE - entire items from the table, as they appeared before they were modified.
        • NEW_AND_OLD_IMAGES - both the new and the old images of the items from the table.
      • CreationRequestDateTime (datetime) --

        The date and time when the request to create this stream was issued.

      • TableName (string) --

        The DynamoDB table with which the stream is associated.

      • KeySchema (list) --

        The key attribute(s) of the stream's DynamoDB table.

        • (dict) --

          Represents a single element of a key schema. A key schema specifies the attributes that make up the primary key of a table, or the key attributes of an index.

          A KeySchemaElement represents exactly one attribute of the primary key. For example, a simple primary key would be represented by one KeySchemaElement (for the partition key). A composite primary key would require one KeySchemaElement for the partition key, and another KeySchemaElement for the sort key.

          A KeySchemaElement must be a scalar, top-level attribute (not a nested attribute). The data type must be one of String, Number, or Binary. The attribute cannot be nested within a List or a Map.

          • AttributeName (string) --

            The name of a key attribute.

          • KeyType (string) --

            The role that this key attribute will assume:

            • HASH - partition key
            • RANGE - sort key

            Note

            The partition key of an item is also known as its hash attribute . The term "hash attribute" derives from DynamoDB's usage of an internal hash function to evenly distribute data items across partitions, based on their partition key values.

            The sort key of an item is also known as its range attribute . The term "range attribute" derives from the way DynamoDB stores items with the same partition key physically close together, in sorted order by the sort key value.

      • Shards (list) --

        The shards that comprise the stream.

        • (dict) --

          A uniquely identified group of stream records within a stream.

          • ShardId (string) --

            The system-generated identifier for this shard.

          • SequenceNumberRange (dict) --

            The range of possible sequence numbers for the shard.

            • StartingSequenceNumber (string) --

              The first sequence number for the stream records contained within a shard. String contains numeric characters only.

            • EndingSequenceNumber (string) --

              The last sequence number for the stream records contained within a shard. String contains numeric characters only.

          • ParentShardId (string) --

            The shard ID of the current shard's parent.

      • LastEvaluatedShardId (string) --

        The shard ID of the item where the operation stopped, inclusive of the previous result set. Use this value to start a new operation, excluding this value in the new request.

        If LastEvaluatedShardId is empty, then the "last page" of results has been processed and there is currently no more data to be retrieved.

        If LastEvaluatedShardId is not empty, it does not necessarily mean that there is more data in the result set. The only way to know when you have reached the end of the result set is when LastEvaluatedShardId is empty.

Exceptions

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
  • ClientMethod (string) -- The client method to presign for
  • Params (dict) -- The parameters normally passed to ClientMethod.
  • ExpiresIn (int) -- The number of seconds the presigned url is valid for. By default it expires in an hour (3600 seconds)
  • HttpMethod (string) -- The http method to use on the generated url. By default, the http method is whatever is used in the method's model.
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
  • ShardIterator (string) --

    [REQUIRED]

    A shard iterator that was retrieved from a previous GetShardIterator operation. This iterator can be used to access the stream records in this shard.

  • Limit (integer) -- The maximum number of records to return from the shard. The upper limit is 1000.
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

  • (dict) --

    Represents the output of a GetRecords operation.

    • Records (list) --

      The stream records from the shard, which were retrieved using the shard iterator.

      • (dict) --

        A description of a unique event within a stream.

        • eventID (string) --

          A globally unique identifier for the event that was recorded in this stream record.

        • eventName (string) --

          The type of data modification that was performed on the DynamoDB table:

          • INSERT - a new item was added to the table.
          • MODIFY - one or more of an existing item's attributes were modified.
          • REMOVE - the item was deleted from the table
        • eventVersion (string) --

          The version number of the stream record format. This number is updated whenever the structure of Record is modified.

          Client applications must not assume that eventVersion will remain at a particular value, as this number is subject to change at any time. In general, eventVersion will only increase as the low-level DynamoDB Streams API evolves.

        • eventSource (string) --

          The AWS service from which the stream record originated. For DynamoDB Streams, this is aws:dynamodb .

        • awsRegion (string) --

          The region in which the GetRecords request was received.

        • dynamodb (dict) --

          The main body of the stream record, containing all of the DynamoDB-specific fields.

          • ApproximateCreationDateTime (datetime) --

            The approximate date and time when the stream record was created, in UNIX epoch time format.

          • Keys (dict) --

            The primary key attribute(s) for the DynamoDB item that was modified.

            • (string) --

              • (dict) --

                Represents the data for an attribute.

                Each attribute value is described as a name-value pair. The name is the data type, and the value is the data itself.

                For more information, see Data Types in the Amazon DynamoDB Developer Guide .

                • S (string) --

                  An attribute of type String. For example:

                  "S": "Hello"

                • N (string) --

                  An attribute of type Number. For example:

                  "N": "123.45"

                  Numbers are sent across the network to DynamoDB as strings, to maximize compatibility across languages and libraries. However, DynamoDB treats them as number type attributes for mathematical operations.

                • B (bytes) --

                  An attribute of type Binary. For example:

                  "B": "dGhpcyB0ZXh0IGlzIGJhc2U2NC1lbmNvZGVk"

                • SS (list) --

                  An attribute of type String Set. For example:

                  "SS": ["Giraffe", "Hippo" ,"Zebra"]

                  • (string) --
                • NS (list) --

                  An attribute of type Number Set. For example:

                  "NS": ["42.2", "-19", "7.5", "3.14"]

                  Numbers are sent across the network to DynamoDB as strings, to maximize compatibility across languages and libraries. However, DynamoDB treats them as number type attributes for mathematical operations.

                  • (string) --
                • BS (list) --

                  An attribute of type Binary Set. For example:

                  "BS": ["U3Vubnk=", "UmFpbnk=", "U25vd3k="]

                  • (bytes) --
                • M (dict) --

                  An attribute of type Map. For example:

                  "M": {"Name": {"S": "Joe"}, "Age": {"N": "35"}}

                  • (string) --

                    • (dict) --

                      Represents the data for an attribute.

                      Each attribute value is described as a name-value pair. The name is the data type, and the value is the data itself.

                      For more information, see Data Types in the Amazon DynamoDB Developer Guide .

                • L (list) --

                  An attribute of type List. For example:

                  "L": [ {"S": "Cookies"} , {"S": "Coffee"}, {"N", "3.14159"}]

                  • (dict) --

                    Represents the data for an attribute.

                    Each attribute value is described as a name-value pair. The name is the data type, and the value is the data itself.

                    For more information, see Data Types in the Amazon DynamoDB Developer Guide .

                • NULL (boolean) --

                  An attribute of type Null. For example:

                  "NULL": true

                • BOOL (boolean) --

                  An attribute of type Boolean. For example:

                  "BOOL": true

          • NewImage (dict) --

            The item in the DynamoDB table as it appeared after it was modified.

            • (string) --

              • (dict) --

                Represents the data for an attribute.

                Each attribute value is described as a name-value pair. The name is the data type, and the value is the data itself.

                For more information, see Data Types in the Amazon DynamoDB Developer Guide .

                • S (string) --

                  An attribute of type String. For example:

                  "S": "Hello"

                • N (string) --

                  An attribute of type Number. For example:

                  "N": "123.45"

                  Numbers are sent across the network to DynamoDB as strings, to maximize compatibility across languages and libraries. However, DynamoDB treats them as number type attributes for mathematical operations.

                • B (bytes) --

                  An attribute of type Binary. For example:

                  "B": "dGhpcyB0ZXh0IGlzIGJhc2U2NC1lbmNvZGVk"

                • SS (list) --

                  An attribute of type String Set. For example:

                  "SS": ["Giraffe", "Hippo" ,"Zebra"]

                  • (string) --
                • NS (list) --

                  An attribute of type Number Set. For example:

                  "NS": ["42.2", "-19", "7.5", "3.14"]

                  Numbers are sent across the network to DynamoDB as strings, to maximize compatibility across languages and libraries. However, DynamoDB treats them as number type attributes for mathematical operations.

                  • (string) --
                • BS (list) --

                  An attribute of type Binary Set. For example:

                  "BS": ["U3Vubnk=", "UmFpbnk=", "U25vd3k="]

                  • (bytes) --
                • M (dict) --

                  An attribute of type Map. For example:

                  "M": {"Name": {"S": "Joe"}, "Age": {"N": "35"}}

                  • (string) --

                    • (dict) --

                      Represents the data for an attribute.

                      Each attribute value is described as a name-value pair. The name is the data type, and the value is the data itself.

                      For more information, see Data Types in the Amazon DynamoDB Developer Guide .

                • L (list) --

                  An attribute of type List. For example:

                  "L": [ {"S": "Cookies"} , {"S": "Coffee"}, {"N", "3.14159"}]

                  • (dict) --

                    Represents the data for an attribute.

                    Each attribute value is described as a name-value pair. The name is the data type, and the value is the data itself.

                    For more information, see Data Types in the Amazon DynamoDB Developer Guide .

                • NULL (boolean) --

                  An attribute of type Null. For example:

                  "NULL": true

                • BOOL (boolean) --

                  An attribute of type Boolean. For example:

                  "BOOL": true

          • OldImage (dict) --

            The item in the DynamoDB table as it appeared before it was modified.

            • (string) --

              • (dict) --

                Represents the data for an attribute.

                Each attribute value is described as a name-value pair. The name is the data type, and the value is the data itself.

                For more information, see Data Types in the Amazon DynamoDB Developer Guide .

                • S (string) --

                  An attribute of type String. For example:

                  "S": "Hello"

                • N (string) --

                  An attribute of type Number. For example:

                  "N": "123.45"

                  Numbers are sent across the network to DynamoDB as strings, to maximize compatibility across languages and libraries. However, DynamoDB treats them as number type attributes for mathematical operations.

                • B (bytes) --

                  An attribute of type Binary. For example:

                  "B": "dGhpcyB0ZXh0IGlzIGJhc2U2NC1lbmNvZGVk"

                • SS (list) --

                  An attribute of type String Set. For example:

                  "SS": ["Giraffe", "Hippo" ,"Zebra"]

                  • (string) --
                • NS (list) --

                  An attribute of type Number Set. For example:

                  "NS": ["42.2", "-19", "7.5", "3.14"]

                  Numbers are sent across the network to DynamoDB as strings, to maximize compatibility across languages and libraries. However, DynamoDB treats them as number type attributes for mathematical operations.

                  • (string) --
                • BS (list) --

                  An attribute of type Binary Set. For example:

                  "BS": ["U3Vubnk=", "UmFpbnk=", "U25vd3k="]

                  • (bytes) --
                • M (dict) --

                  An attribute of type Map. For example:

                  "M": {"Name": {"S": "Joe"}, "Age": {"N": "35"}}

                  • (string) --

                    • (dict) --

                      Represents the data for an attribute.

                      Each attribute value is described as a name-value pair. The name is the data type, and the value is the data itself.

                      For more information, see Data Types in the Amazon DynamoDB Developer Guide .

                • L (list) --

                  An attribute of type List. For example:

                  "L": [ {"S": "Cookies"} , {"S": "Coffee"}, {"N", "3.14159"}]

                  • (dict) --

                    Represents the data for an attribute.

                    Each attribute value is described as a name-value pair. The name is the data type, and the value is the data itself.

                    For more information, see Data Types in the Amazon DynamoDB Developer Guide .

                • NULL (boolean) --

                  An attribute of type Null. For example:

                  "NULL": true

                • BOOL (boolean) --

                  An attribute of type Boolean. For example:

                  "BOOL": true

          • SequenceNumber (string) --

            The sequence number of the stream record.

          • SizeBytes (integer) --

            The size of the stream record, in bytes.

          • StreamViewType (string) --

            The type of data from the modified DynamoDB item that was captured in this stream record:

            • KEYS_ONLY - only the key attributes of the modified item.
            • NEW_IMAGE - the entire item, as it appeared after it was modified.
            • OLD_IMAGE - the entire item, as it appeared before it was modified.
            • NEW_AND_OLD_IMAGES - both the new and the old item images of the item.
        • userIdentity (dict) --

          Items that are deleted by the Time to Live process after expiration have the following fields:

          • Records[].userIdentity.type "Service"
          • Records[].userIdentity.principalId "dynamodb.amazonaws.com"
          • PrincipalId (string) --

            A unique identifier for the entity that made the call. For Time To Live, the principalId is "dynamodb.amazonaws.com".

          • Type (string) --

            The type of the identity. For Time To Live, the type is "Service".

    • NextShardIterator (string) --

      The next position in the shard from which to start sequentially reading stream records. If set to null , the shard has been closed and the requested iterator will not return any more data.

Exceptions

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
  • StreamArn (string) --

    [REQUIRED]

    The Amazon Resource Name (ARN) for the stream.

  • ShardId (string) --

    [REQUIRED]

    The identifier of the shard. The iterator will be returned for this shard ID.

  • ShardIteratorType (string) --

    [REQUIRED]

    Determines how the shard iterator is used to start reading stream records from the shard:

    • AT_SEQUENCE_NUMBER - Start reading exactly from the position denoted by a specific sequence number.
    • AFTER_SEQUENCE_NUMBER - Start reading right after the position denoted by a specific sequence number.
    • TRIM_HORIZON - Start reading at the last (untrimmed) stream record, which is the oldest record in the 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.
    • LATEST - Start reading just after the most recent stream record in the shard, so that you always read the most recent data in the shard.
  • SequenceNumber (string) -- The sequence number of a stream record in the shard from which to start reading.
Return type

dict

Returns

Response Syntax

{
    'ShardIterator': 'string'
}

Response Structure

  • (dict) --

    Represents the output of a GetShardIterator operation.

    • ShardIterator (string) --

      The position in the shard from which to start reading stream records sequentially. A shard iterator specifies this position using the sequence number of a stream record in a shard.

Exceptions

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)

Returns an object that can wait for some condition.

Parameters
waiter_name (str) -- The name of the waiter to get. See the waiters section of the service docs for a list of available waiters.
Returns
The specified waiter object.
Return type
botocore.waiter.Waiter
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
  • TableName (string) -- If this parameter is provided, then only the streams associated with this table name are returned.
  • Limit (integer) -- The maximum number of streams to return. The upper limit is 100.
  • ExclusiveStartStreamArn (string) -- The ARN (Amazon Resource Name) of the first item that this operation will evaluate. Use the value that was returned for LastEvaluatedStreamArn in the previous operation.
Return type

dict

Returns

Response Syntax

{
    'Streams': [
        {
            'StreamArn': 'string',
            'TableName': 'string',
            'StreamLabel': 'string'
        },
    ],
    'LastEvaluatedStreamArn': 'string'
}

Response Structure

  • (dict) --

    Represents the output of a ListStreams operation.

    • Streams (list) --

      A list of stream descriptors associated with the current account and endpoint.

      • (dict) --

        Represents all of the data describing a particular stream.

        • StreamArn (string) --

          The Amazon Resource Name (ARN) for the stream.

        • TableName (string) --

          The DynamoDB table with which the stream is associated.

        • StreamLabel (string) --

          A timestamp, in ISO 8601 format, for this stream.

          Note that LatestStreamLabel is not a unique identifier for the stream, because it is possible that a stream from another table might have the same timestamp. However, the combination of the following three elements is guaranteed to be unique:

          • the AWS customer ID.
          • the table name
          • the StreamLabel
    • LastEvaluatedStreamArn (string) --

      The stream ARN of the item where the operation stopped, inclusive of the previous result set. Use this value to start a new operation, excluding this value in the new request.

      If LastEvaluatedStreamArn is empty, then the "last page" of results has been processed and there is no more data to be retrieved.

      If LastEvaluatedStreamArn is not empty, it does not necessarily mean that there is more data in the result set. The only way to know when you have reached the end of the result set is when LastEvaluatedStreamArn is empty.

Exceptions

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': {
        '...': '...',
    },
}

Client Exceptions

Client exceptions are available on a client instance via the exceptions property. For more detailed instructions and examples on the exact usage of client exceptions, see the error handling user guide.

The available client exceptions are:

class DynamoDBStreams.Client.exceptions.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.

Example

try:
  ...
except client.exceptions.ExpiredIteratorException as e:
  print(e.response)
response

The parsed error response. All exceptions have a top level Error key that provides normalized access to common exception atrributes. All other keys are specific to this service or exception class.

Syntax

{
    'message': 'string',
    'Error': {
        'Code': 'string',
        'Message': 'string'
    }
}

Structure

  • (dict) --

    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.

    • message (string) --

      The provided iterator exceeds the maximum age allowed.

    • Error (dict) -- Normalized access to common exception attributes.

      • Code (string) -- An identifier specifying the exception type.
      • Message (string) -- A descriptive message explaining why the exception occured.
class DynamoDBStreams.Client.exceptions.InternalServerError

An error occurred on the server side.

Example

try:
  ...
except client.exceptions.InternalServerError as e:
  print(e.response)
response

The parsed error response. All exceptions have a top level Error key that provides normalized access to common exception atrributes. All other keys are specific to this service or exception class.

Syntax

{
    'message': 'string',
    'Error': {
        'Code': 'string',
        'Message': 'string'
    }
}

Structure

  • (dict) --

    An error occurred on the server side.

    • message (string) --

      The server encountered an internal error trying to fulfill the request.

    • Error (dict) -- Normalized access to common exception attributes.

      • Code (string) -- An identifier specifying the exception type.
      • Message (string) -- A descriptive message explaining why the exception occured.
class DynamoDBStreams.Client.exceptions.LimitExceededException

There is no limit to the number of daily on-demand backups that can be taken.

Up to 50 simultaneous table operations are allowed per account. These operations include CreateTable , UpdateTable , DeleteTable ,``UpdateTimeToLive`` , RestoreTableFromBackup , and RestoreTableToPointInTime .

The only exception is when you are creating a table with one or more secondary indexes. You can have up to 25 such requests running at a time; however, if the table or index specifications are complex, DynamoDB might temporarily reduce the number of concurrent operations.

There is a soft account quota of 256 tables.

Example

try:
  ...
except client.exceptions.LimitExceededException as e:
  print(e.response)
response

The parsed error response. All exceptions have a top level Error key that provides normalized access to common exception atrributes. All other keys are specific to this service or exception class.

Syntax

{
    'message': 'string',
    'Error': {
        'Code': 'string',
        'Message': 'string'
    }
}

Structure

  • (dict) --

    There is no limit to the number of daily on-demand backups that can be taken.

    Up to 50 simultaneous table operations are allowed per account. These operations include CreateTable , UpdateTable , DeleteTable ,``UpdateTimeToLive`` , RestoreTableFromBackup , and RestoreTableToPointInTime .

    The only exception is when you are creating a table with one or more secondary indexes. You can have up to 25 such requests running at a time; however, if the table or index specifications are complex, DynamoDB might temporarily reduce the number of concurrent operations.

    There is a soft account quota of 256 tables.

    • message (string) --

      Too many operations for a given subscriber.

    • Error (dict) -- Normalized access to common exception attributes.

      • Code (string) -- An identifier specifying the exception type.
      • Message (string) -- A descriptive message explaining why the exception occured.
class DynamoDBStreams.Client.exceptions.ResourceNotFoundException

The operation tried to access a nonexistent table or index. The resource might not be specified correctly, or its status might not be ACTIVE .

Example

try:
  ...
except client.exceptions.ResourceNotFoundException as e:
  print(e.response)
response

The parsed error response. All exceptions have a top level Error key that provides normalized access to common exception atrributes. All other keys are specific to this service or exception class.

Syntax

{
    'message': 'string',
    'Error': {
        'Code': 'string',
        'Message': 'string'
    }
}

Structure

  • (dict) --

    The operation tried to access a nonexistent table or index. The resource might not be specified correctly, or its status might not be ACTIVE .

    • message (string) --

      The resource which is being requested does not exist.

    • Error (dict) -- Normalized access to common exception attributes.

      • Code (string) -- An identifier specifying the exception type.
      • Message (string) -- A descriptive message explaining why the exception occured.
class DynamoDBStreams.Client.exceptions.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.

Example

try:
  ...
except client.exceptions.TrimmedDataAccessException as e:
  print(e.response)
response

The parsed error response. All exceptions have a top level Error key that provides normalized access to common exception atrributes. All other keys are specific to this service or exception class.

Syntax

{
    'message': 'string',
    'Error': {
        'Code': 'string',
        'Message': 'string'
    }
}

Structure

  • (dict) --

    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.
    • message (string) --

      "The data you are trying to access has been trimmed.

    • Error (dict) -- Normalized access to common exception attributes.

      • Code (string) -- An identifier specifying the exception type.
      • Message (string) -- A descriptive message explaining why the exception occured.

Paginators

The available paginators are: