{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE DeriveGeneric      #-}
{-# LANGUAGE OverloadedStrings  #-}
{-# LANGUAGE RecordWildCards    #-}
{-# LANGUAGE TypeFamilies       #-}

{-# OPTIONS_GHC -fno-warn-unused-imports #-}
{-# OPTIONS_GHC -fno-warn-unused-binds   #-}
{-# OPTIONS_GHC -fno-warn-unused-matches #-}

-- Derived from AWS service descriptions, licensed under Apache 2.0.

-- |
-- Module      : Network.AWS.Kinesis.CreateStream
-- Copyright   : (c) 2013-2015 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay <brendan.g.hay@gmail.com>
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Creates a Amazon Kinesis stream. A stream captures and transports data
-- records that are continuously emitted from different data sources or
-- /producers/. Scale-out within an Amazon Kinesis stream is explicitly
-- supported by means of shards, which are uniquely identified groups of
-- data records in an Amazon Kinesis stream.
--
-- You specify and control the number of shards that a stream is composed
-- of. Each shard can support reads up to 5 transactions per second, up to
-- a maximum data read total of 2 MB per second. Each shard can support
-- writes up to 1,000 records per second, up to a maximum data write total
-- of 1 MB per second. You can add shards to a stream if the amount of data
-- input increases and you can remove shards if the amount of data input
-- decreases.
--
-- The stream name identifies the stream. The name is scoped to the AWS
-- account used by the application. It is also scoped by region. That is,
-- two streams in two different accounts can have the same name, and two
-- streams in the same account, but in two different regions, can have the
-- same name.
--
-- 'CreateStream' is an asynchronous operation. Upon receiving a
-- 'CreateStream' request, Amazon Kinesis immediately returns and sets the
-- stream status to 'CREATING'. After the stream is created, Amazon Kinesis
-- sets the stream status to 'ACTIVE'. You should perform read and write
-- operations only on an 'ACTIVE' stream.
--
-- You receive a 'LimitExceededException' when making a 'CreateStream'
-- request if you try to do one of the following:
--
-- -   Have more than five streams in the 'CREATING' state at any point in
--     time.
-- -   Create more shards than are authorized for your account.
--
-- For the default shard limit for an AWS account, see
-- <http://docs.aws.amazon.com/kinesis/latest/dev/service-sizes-and-limits.html Amazon Kinesis Limits>.
-- If you need to increase this limit,
-- <http://docs.aws.amazon.com/general/latest/gr/aws_service_limits.html contact AWS Support>.
--
-- You can use 'DescribeStream' to check the stream status, which is
-- returned in 'StreamStatus'.
--
-- CreateStream has a limit of 5 transactions per second per account.
--
-- /See:/ <http://docs.aws.amazon.com/kinesis/latest/APIReference/API_CreateStream.html AWS API Reference> for CreateStream.
module Network.AWS.Kinesis.CreateStream
    (
    -- * Creating a Request
      createStream
    , CreateStream
    -- * Request Lenses
    , csStreamName
    , csShardCount

    -- * Destructuring the Response
    , createStreamResponse
    , CreateStreamResponse
    ) where

import           Network.AWS.Kinesis.Types
import           Network.AWS.Kinesis.Types.Product
import           Network.AWS.Prelude
import           Network.AWS.Request
import           Network.AWS.Response

-- | Represents the input for 'CreateStream'.
--
-- /See:/ 'createStream' smart constructor.
data CreateStream = CreateStream'
    { _csStreamName :: !Text
    , _csShardCount :: !Nat
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'CreateStream' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'csStreamName'
--
-- * 'csShardCount'
createStream
    :: Text -- ^ 'csStreamName'
    -> Natural -- ^ 'csShardCount'
    -> CreateStream
createStream pStreamName_ pShardCount_ =
    CreateStream'
    { _csStreamName = pStreamName_
    , _csShardCount = _Nat # pShardCount_
    }

-- | A name to identify the stream. The stream name is scoped to the AWS
-- account used by the application that creates the stream. It is also
-- scoped by region. That is, two streams in two different AWS accounts can
-- have the same name, and two streams in the same AWS account, but in two
-- different regions, can have the same name.
csStreamName :: Lens' CreateStream Text
csStreamName = lens _csStreamName (\ s a -> s{_csStreamName = a});

-- | The number of shards that the stream will use. The throughput of the
-- stream is a function of the number of shards; more shards are required
-- for greater provisioned throughput.
--
-- DefaultShardLimit;
csShardCount :: Lens' CreateStream Natural
csShardCount = lens _csShardCount (\ s a -> s{_csShardCount = a}) . _Nat;

instance AWSRequest CreateStream where
        type Rs CreateStream = CreateStreamResponse
        request = postJSON kinesis
        response = receiveNull CreateStreamResponse'

instance ToHeaders CreateStream where
        toHeaders
          = const
              (mconcat
                 ["X-Amz-Target" =#
                    ("Kinesis_20131202.CreateStream" :: ByteString),
                  "Content-Type" =#
                    ("application/x-amz-json-1.1" :: ByteString)])

instance ToJSON CreateStream where
        toJSON CreateStream'{..}
          = object
              (catMaybes
                 [Just ("StreamName" .= _csStreamName),
                  Just ("ShardCount" .= _csShardCount)])

instance ToPath CreateStream where
        toPath = const "/"

instance ToQuery CreateStream where
        toQuery = const mempty

-- | /See:/ 'createStreamResponse' smart constructor.
data CreateStreamResponse =
    CreateStreamResponse'
    deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'CreateStreamResponse' with the minimum fields required to make a request.
--
createStreamResponse
    :: CreateStreamResponse
createStreamResponse = CreateStreamResponse'
