DynamoDB Streams examples using Amazon CLI - Amazon Command Line Interface
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DynamoDB Streams examples using Amazon CLI

The following code examples show you how to perform actions and implement common scenarios by using the Amazon Command Line Interface with DynamoDB Streams.

Actions are code excerpts from larger programs and must be run in context. While actions show you how to call individual service functions, you can see actions in context in their related scenarios and cross-service examples.

Scenarios are code examples that show you how to accomplish a specific task by calling multiple functions within the same service.

Each example includes a link to GitHub, where you can find instructions on how to set up and run the code in context.

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The following code example shows how to use describe-stream.

Amazon CLI

To get information about a DynamoDB stream

The following describe-stream command displays information about the specific DynamoDB stream.

aws dynamodbstreams describe-stream \
    --stream-arn arn:aws:dynamodb:us-west-1:123456789012:table/Music/stream/2019-10-22T18:02:01.576

Output:

{
    "StreamDescription": {
        "StreamArn": "arn:aws:dynamodb:us-west-1:123456789012:table/Music/stream/2019-10-22T18:02:01.576",
        "StreamLabel": "2019-10-22T18:02:01.576",
        "StreamStatus": "ENABLED",
        "StreamViewType": "NEW_AND_OLD_IMAGES",
        "CreationRequestDateTime": 1571767321.571,
        "TableName": "Music",
        "KeySchema": [
            {
                "AttributeName": "Artist",
                "KeyType": "HASH"
            },
            {
                "AttributeName": "SongTitle",
                "KeyType": "RANGE"
            }
        ],
        "Shards": [
            {
                "ShardId": "shardId-00000001571767321804-697ce3d2",
                "SequenceNumberRange": {
                    "StartingSequenceNumber": "4000000000000642977831",
                    "EndingSequenceNumber": "4000000000000642977831"
                }
            },
            {
                "ShardId": "shardId-00000001571780995058-40810d86",
                "SequenceNumberRange": {
                    "StartingSequenceNumber": "757400000000005655171150"
                },
                "ParentShardId": "shardId-00000001571767321804-697ce3d2"
            }
        ]
    }
}

For more information, see Capturing Table Activity with DynamoDB Streams in the Amazon DynamoDB Developer Guide.

  • For API details, see DescribeStream in Amazon CLI Command Reference.

The following code example shows how to use get-records.

Amazon CLI

To get records from a Dynamodb stream

The following get-records command retrieves records using the specified Amazon DynamoDB shard iterator.

aws dynamodbstreams get-records \
    --shard-iterator "arn:aws:dynamodb:us-west-1:123456789012:table/Music/stream/2019-10-22T18:02:01.576|1|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"

Output:

{
    "Records": [
        {
            "eventID": "c3b5d798eef6215d42f8137b19a88e50",
            "eventName": "INSERT",
            "eventVersion": "1.1",
            "eventSource": "aws:dynamodb",
            "awsRegion": "us-west-1",
            "dynamodb": {
                "ApproximateCreationDateTime": 1571849028.0,
                "Keys": {
                    "Artist": {
                        "S": "No One You Know"
                    },
                    "SongTitle": {
                        "S": "Call Me Today"
                    }
                },
                "NewImage": {
                    "AlbumTitle": {
                        "S": "Somewhat Famous"
                    },
                    "Artist": {
                        "S": "No One You Know"
                    },
                    "Awards": {
                        "N": "1"
                    },
                    "SongTitle": {
                        "S": "Call Me Today"
                    }
                },
                "SequenceNumber": "700000000013256296913",
                "SizeBytes": 119,
                "StreamViewType": "NEW_AND_OLD_IMAGES"
            }
        },
        {
            "eventID": "878960a6967867e2da16b27380a27328",
            "eventName": "INSERT",
            "eventVersion": "1.1",
            "eventSource": "aws:dynamodb",
            "awsRegion": "us-west-1",
            "dynamodb": {
                "ApproximateCreationDateTime": 1571849029.0,
                "Keys": {
                    "Artist": {
                        "S": "Acme Band"
                    },
                    "SongTitle": {
                        "S": "Happy Day"
                    }
                },
                "NewImage": {
                    "AlbumTitle": {
                        "S": "Songs About Life"
                    },
                    "Artist": {
                        "S": "Acme Band"
                    },
                    "Awards": {
                        "N": "10"
                    },
                    "SongTitle": {
                        "S": "Happy Day"
                    }
                },
                "SequenceNumber": "800000000013256297217",
                "SizeBytes": 100,
                "StreamViewType": "NEW_AND_OLD_IMAGES"
            }
        },
        {
            "eventID": "520fabde080e159fc3710b15ee1d4daa",
            "eventName": "MODIFY",
            "eventVersion": "1.1",
            "eventSource": "aws:dynamodb",
            "awsRegion": "us-west-1",
            "dynamodb": {
                "ApproximateCreationDateTime": 1571849734.0,
                "Keys": {
                    "Artist": {
                        "S": "Acme Band"
                    },
                    "SongTitle": {
                        "S": "Happy Day"
                    }
                },
                "NewImage": {
                    "AlbumTitle": {
                        "S": "Updated Album Title"
                    },
                    "Artist": {
                        "S": "Acme Band"
                    },
                    "Awards": {
                        "N": "10"
                    },
                    "SongTitle": {
                        "S": "Happy Day"
                    }
                },
                "OldImage": {
                    "AlbumTitle": {
                        "S": "Songs About Life"
                    },
                    "Artist": {
                        "S": "Acme Band"
                    },
                    "Awards": {
                        "N": "10"
                    },
                    "SongTitle": {
                        "S": "Happy Day"
                    }
                },
                "SequenceNumber": "900000000013256687845",
                "SizeBytes": 170,
                "StreamViewType": "NEW_AND_OLD_IMAGES"
            }
        }
    ],
    "NextShardIterator": "arn:aws:dynamodb:us-west-1:123456789012:table/Music/stream/2019-10-23T16:41:08.740|1|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"
}

For more information, see Capturing Table Activity with DynamoDB Streams in the Amazon DynamoDB Developer Guide.

  • For API details, see GetRecords in Amazon CLI Command Reference.

The following code example shows how to use get-shard-iterator.

Amazon CLI

To get a shard iterator

The following get-shard-iterator command retrieves a shard iterator for the specified shard.

aws dynamodbstreams get-shard-iterator \
    --stream-arn arn:aws:dynamodb:us-west-1:12356789012:table/Music/stream/2019-10-22T18:02:01.576 \
    --shard-id shardId-00000001571780995058-40810d86 \
    --shard-iterator-type LATEST

Output:

{
    "ShardIterator": "arn:aws:dynamodb:us-west-1:123456789012:table/Music/stream/2019-10-22T18:02:01.576|1|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"
}

For more information, see Capturing Table Activity with DynamoDB Streams in the Amazon DynamoDB Developer Guide.

The following code example shows how to use list-streams.

Amazon CLI

To list DynamoDB streams

The following list-streams command lists all existing Amazon DynamoDB streams within the default Amazon Region.

aws dynamodbstreams list-streams

Output:

{
    "Streams": [
        {
            "StreamArn": "arn:aws:dynamodb:us-west-1:123456789012:table/Music/stream/2019-10-22T18:02:01.576",
            "TableName": "Music",
            "StreamLabel": "2019-10-22T18:02:01.576"
        }
    ]
}

For more information, see Capturing Table Activity with DynamoDB Streams in the Amazon DynamoDB Developer Guide.

  • For API details, see ListStreams in Amazon CLI Command Reference.