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hs-aws-dynamodb-streams's Introduction

Haskell Bindings for Amazon DynamoDb Streams

Amazon DynamoDb Streams API Reference

Installation

Assuming that the Haskell compiler GHC and the Haskell build tool cabal is already installed run the following command from the shell:

cabal install --enable-documentation

Example Usage

Here is a very simple example for making a call to DynamoDb Streams. For more ellaborate usage refer to the documentation of the AWS package. These bindings have extensive support for lenses and prisms; we do not incur a dependency on lens, but profunctors is required.

import Aws
import Aws.General
import Aws.DynamoDb.Streams

main ∷ IO ()
main = do
  awsConfiguration ← baseConfiguration
  let configuration = StreamsConfiguration UsEast1
  ListStreamsResponse{..} ← simpleAws awsConfiguration configuration listStreams
  DescribeStreamResponse StreamDescription{..} ←
    let Just streamArn = _sStreamArn $ head _lstrStreams
    in simpleAws awsConfiguration configuration $ describeStream streamArn

  GetShardIteratorResponse{..} ← simpleAws awsConfiguration configuration $
    let Just shardId = _shShardId $ head _sdShards
        Just streamArn = _sdStreamArn
    in getShardIterator streamArn shardId ShardIteratorLatest

  resp ← simpleAws awsConfiguration configuration $ getRecords _gsirShardIterator
  print resp

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