{-# 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.SQS.DeleteMessage
-- Copyright   : (c) 2013-2016 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)
--
-- Deletes the specified message from the specified queue. You specify the
-- message by using the message\'s 'receipt handle' and not the
-- 'message ID' you received when you sent the message. Even if the message
-- is locked by another reader due to the visibility timeout setting, it is
-- still deleted from the queue. If you leave a message in the queue for
-- longer than the queue\'s configured retention period, Amazon SQS
-- automatically deletes it.
--
-- The receipt handle is associated with a specific instance of receiving
-- the message. If you receive a message more than once, the receipt handle
-- you get each time you receive the message is different. When you request
-- 'DeleteMessage', if you don\'t provide the most recently received
-- receipt handle for the message, the request will still succeed, but the
-- message might not be deleted.
--
-- It is possible you will receive a message even after you have deleted
-- it. This might happen on rare occasions if one of the servers storing a
-- copy of the message is unavailable when you request to delete the
-- message. The copy remains on the server and might be returned to you
-- again on a subsequent receive request. You should create your system to
-- be idempotent so that receiving a particular message more than once is
-- not a problem.
module Network.AWS.SQS.DeleteMessage
    (
    -- * Creating a Request
      deleteMessage
    , DeleteMessage
    -- * Request Lenses
    , dmQueueURL
    , dmReceiptHandle

    -- * Destructuring the Response
    , deleteMessageResponse
    , DeleteMessageResponse
    ) where

import           Network.AWS.Lens
import           Network.AWS.Prelude
import           Network.AWS.Request
import           Network.AWS.Response
import           Network.AWS.SQS.Types
import           Network.AWS.SQS.Types.Product

-- | /See:/ 'deleteMessage' smart constructor.
data DeleteMessage = DeleteMessage'
    { _dmQueueURL      :: !Text
    , _dmReceiptHandle :: !Text
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DeleteMessage' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dmQueueURL'
--
-- * 'dmReceiptHandle'
deleteMessage
    :: Text -- ^ 'dmQueueURL'
    -> Text -- ^ 'dmReceiptHandle'
    -> DeleteMessage
deleteMessage pQueueURL_ pReceiptHandle_ =
    DeleteMessage'
    { _dmQueueURL = pQueueURL_
    , _dmReceiptHandle = pReceiptHandle_
    }

-- | The URL of the Amazon SQS queue to take action on.
dmQueueURL :: Lens' DeleteMessage Text
dmQueueURL = lens _dmQueueURL (\ s a -> s{_dmQueueURL = a});

-- | The receipt handle associated with the message to delete.
dmReceiptHandle :: Lens' DeleteMessage Text
dmReceiptHandle = lens _dmReceiptHandle (\ s a -> s{_dmReceiptHandle = a});

instance AWSRequest DeleteMessage where
        type Rs DeleteMessage = DeleteMessageResponse
        request = postQuery sqs
        response = receiveNull DeleteMessageResponse'

instance Hashable DeleteMessage

instance ToHeaders DeleteMessage where
        toHeaders = const mempty

instance ToPath DeleteMessage where
        toPath = const "/"

instance ToQuery DeleteMessage where
        toQuery DeleteMessage'{..}
          = mconcat
              ["Action" =: ("DeleteMessage" :: ByteString),
               "Version" =: ("2012-11-05" :: ByteString),
               "QueueUrl" =: _dmQueueURL,
               "ReceiptHandle" =: _dmReceiptHandle]

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

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