{-# 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.SWF.RespondActivityTaskCompleted
-- 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)
--
-- Used by workers to tell the service that the ActivityTask identified by
-- the 'taskToken' completed successfully with a 'result' (if provided).
-- The 'result' appears in the 'ActivityTaskCompleted' event in the
-- workflow history.
--
-- If the requested task does not complete successfully, use
-- RespondActivityTaskFailed instead. If the worker finds that the task is
-- canceled through the 'canceled' flag returned by
-- RecordActivityTaskHeartbeat, it should cancel the task, clean up and
-- then call RespondActivityTaskCanceled.
--
-- A task is considered open from the time that it is scheduled until it is
-- closed. Therefore a task is reported as open while a worker is
-- processing it. A task is closed after it has been specified in a call to
-- RespondActivityTaskCompleted, RespondActivityTaskCanceled,
-- RespondActivityTaskFailed, or the task has
-- <http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-basic.html#swf-dev-timeout-types timed out>.
--
-- __Access Control__
--
-- You can use IAM policies to control this action\'s access to Amazon SWF
-- resources as follows:
--
-- -   Use a 'Resource' element with the domain name to limit the action to
--     only specified domains.
-- -   Use an 'Action' element to allow or deny permission to call this
--     action.
-- -   You cannot use an IAM policy to constrain this action\'s parameters.
--
-- If the caller does not have sufficient permissions to invoke the action,
-- or the parameter values fall outside the specified constraints, the
-- action fails. The associated event attribute\'s __cause__ parameter will
-- be set to OPERATION_NOT_PERMITTED. For details and example IAM policies,
-- see
-- <http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dev-iam.html Using IAM to Manage Access to Amazon SWF Workflows>.
--
-- /See:/ <http://docs.aws.amazon.com/amazonswf/latest/apireference/API_RespondActivityTaskCompleted.html AWS API Reference> for RespondActivityTaskCompleted.
module Network.AWS.SWF.RespondActivityTaskCompleted
    (
    -- * Creating a Request
      respondActivityTaskCompleted
    , RespondActivityTaskCompleted
    -- * Request Lenses
    , ratcResult
    , ratcTaskToken

    -- * Destructuring the Response
    , respondActivityTaskCompletedResponse
    , RespondActivityTaskCompletedResponse
    ) where

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

-- | /See:/ 'respondActivityTaskCompleted' smart constructor.
data RespondActivityTaskCompleted = RespondActivityTaskCompleted'
    { _ratcResult    :: !(Maybe Text)
    , _ratcTaskToken :: !Text
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'RespondActivityTaskCompleted' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'ratcResult'
--
-- * 'ratcTaskToken'
respondActivityTaskCompleted
    :: Text -- ^ 'ratcTaskToken'
    -> RespondActivityTaskCompleted
respondActivityTaskCompleted pTaskToken_ =
    RespondActivityTaskCompleted'
    { _ratcResult = Nothing
    , _ratcTaskToken = pTaskToken_
    }

-- | The result of the activity task. It is a free form string that is
-- implementation specific.
ratcResult :: Lens' RespondActivityTaskCompleted (Maybe Text)
ratcResult = lens _ratcResult (\ s a -> s{_ratcResult = a});

-- | The 'taskToken' of the ActivityTask.
--
-- 'taskToken' is generated by the service and should be treated as an
-- opaque value. If the task is passed to another process, its 'taskToken'
-- must also be passed. This enables it to provide its progress and respond
-- with results.
ratcTaskToken :: Lens' RespondActivityTaskCompleted Text
ratcTaskToken = lens _ratcTaskToken (\ s a -> s{_ratcTaskToken = a});

instance AWSRequest RespondActivityTaskCompleted
         where
        type Rs RespondActivityTaskCompleted =
             RespondActivityTaskCompletedResponse
        request = postJSON sWF
        response
          = receiveNull RespondActivityTaskCompletedResponse'

instance ToHeaders RespondActivityTaskCompleted where
        toHeaders
          = const
              (mconcat
                 ["X-Amz-Target" =#
                    ("SimpleWorkflowService.RespondActivityTaskCompleted"
                       :: ByteString),
                  "Content-Type" =#
                    ("application/x-amz-json-1.0" :: ByteString)])

instance ToJSON RespondActivityTaskCompleted where
        toJSON RespondActivityTaskCompleted'{..}
          = object
              (catMaybes
                 [("result" .=) <$> _ratcResult,
                  Just ("taskToken" .= _ratcTaskToken)])

instance ToPath RespondActivityTaskCompleted where
        toPath = const "/"

instance ToQuery RespondActivityTaskCompleted where
        toQuery = const mempty

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

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