{-# 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.RespondActivityTaskCanceled
-- 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' was successfully canceled. Additional 'details' can be
-- optionally provided using the 'details' argument.
--
-- These 'details' (if provided) appear in the 'ActivityTaskCanceled' event
-- added to the workflow history.
--
-- Only use this operation if the 'canceled' flag of a
-- RecordActivityTaskHeartbeat request returns 'true' and if the activity
-- can be safely undone or abandoned.
--
-- 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_RespondActivityTaskCanceled.html AWS API Reference> for RespondActivityTaskCanceled.
module Network.AWS.SWF.RespondActivityTaskCanceled
    (
    -- * Creating a Request
      respondActivityTaskCanceled
    , RespondActivityTaskCanceled
    -- * Request Lenses
    , rDetails
    , rTaskToken

    -- * Destructuring the Response
    , respondActivityTaskCanceledResponse
    , RespondActivityTaskCanceledResponse
    ) 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:/ 'respondActivityTaskCanceled' smart constructor.
data RespondActivityTaskCanceled = RespondActivityTaskCanceled'
    { _rDetails   :: !(Maybe Text)
    , _rTaskToken :: !Text
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'RespondActivityTaskCanceled' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'rDetails'
--
-- * 'rTaskToken'
respondActivityTaskCanceled
    :: Text -- ^ 'rTaskToken'
    -> RespondActivityTaskCanceled
respondActivityTaskCanceled pTaskToken_ =
    RespondActivityTaskCanceled'
    { _rDetails = Nothing
    , _rTaskToken = pTaskToken_
    }

-- | /Optional./ Information about the cancellation.
rDetails :: Lens' RespondActivityTaskCanceled (Maybe Text)
rDetails = lens _rDetails (\ s a -> s{_rDetails = 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.
rTaskToken :: Lens' RespondActivityTaskCanceled Text
rTaskToken = lens _rTaskToken (\ s a -> s{_rTaskToken = a});

instance AWSRequest RespondActivityTaskCanceled where
        type Sv RespondActivityTaskCanceled = SWF
        type Rs RespondActivityTaskCanceled =
             RespondActivityTaskCanceledResponse
        request = postJSON
        response
          = receiveNull RespondActivityTaskCanceledResponse'

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

instance ToJSON RespondActivityTaskCanceled where
        toJSON RespondActivityTaskCanceled'{..}
          = object
              ["details" .= _rDetails, "taskToken" .= _rTaskToken]

instance ToPath RespondActivityTaskCanceled where
        toPath = const "/"

instance ToQuery RespondActivityTaskCanceled where
        toQuery = const mempty

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

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