{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE DuplicateRecordFields #-}
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE StrictData #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE NoImplicitPrelude #-}
{-# OPTIONS_GHC -fno-warn-unused-binds #-}
{-# OPTIONS_GHC -fno-warn-unused-imports #-}
{-# OPTIONS_GHC -fno-warn-unused-matches #-}

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

-- |
-- Module      : Amazonka.DocumentDB.FailoverDBCluster
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Forces a failover for a cluster.
--
-- A failover for a cluster promotes one of the Amazon DocumentDB replicas
-- (read-only instances) in the cluster to be the primary instance (the
-- cluster writer).
--
-- If the primary instance fails, Amazon DocumentDB automatically fails
-- over to an Amazon DocumentDB replica, if one exists. You can force a
-- failover when you want to simulate a failure of a primary instance for
-- testing.
module Amazonka.DocumentDB.FailoverDBCluster
  ( -- * Creating a Request
    FailoverDBCluster (..),
    newFailoverDBCluster,

    -- * Request Lenses
    failoverDBCluster_dbClusterIdentifier,
    failoverDBCluster_targetDBInstanceIdentifier,

    -- * Destructuring the Response
    FailoverDBClusterResponse (..),
    newFailoverDBClusterResponse,

    -- * Response Lenses
    failoverDBClusterResponse_dbCluster,
    failoverDBClusterResponse_httpStatus,
  )
where

import qualified Amazonka.Core as Core
import qualified Amazonka.Core.Lens.Internal as Lens
import qualified Amazonka.Data as Data
import Amazonka.DocumentDB.Types
import qualified Amazonka.Prelude as Prelude
import qualified Amazonka.Request as Request
import qualified Amazonka.Response as Response

-- | Represents the input to FailoverDBCluster.
--
-- /See:/ 'newFailoverDBCluster' smart constructor.
data FailoverDBCluster = FailoverDBCluster'
  { -- | A cluster identifier to force a failover for. This parameter is not case
    -- sensitive.
    --
    -- Constraints:
    --
    -- -   Must match the identifier of an existing @DBCluster@.
    dbClusterIdentifier :: Prelude.Maybe Prelude.Text,
    -- | The name of the instance to promote to the primary instance.
    --
    -- You must specify the instance identifier for an Amazon DocumentDB
    -- replica in the cluster. For example, @mydbcluster-replica1@.
    targetDBInstanceIdentifier :: Prelude.Maybe Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'FailoverDBCluster' with all optional fields omitted.
--
-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
--
-- The following record fields are available, with the corresponding lenses provided
-- for backwards compatibility:
--
-- 'dbClusterIdentifier', 'failoverDBCluster_dbClusterIdentifier' - A cluster identifier to force a failover for. This parameter is not case
-- sensitive.
--
-- Constraints:
--
-- -   Must match the identifier of an existing @DBCluster@.
--
-- 'targetDBInstanceIdentifier', 'failoverDBCluster_targetDBInstanceIdentifier' - The name of the instance to promote to the primary instance.
--
-- You must specify the instance identifier for an Amazon DocumentDB
-- replica in the cluster. For example, @mydbcluster-replica1@.
newFailoverDBCluster ::
  FailoverDBCluster
newFailoverDBCluster =
  FailoverDBCluster'
    { dbClusterIdentifier =
        Prelude.Nothing,
      targetDBInstanceIdentifier = Prelude.Nothing
    }

-- | A cluster identifier to force a failover for. This parameter is not case
-- sensitive.
--
-- Constraints:
--
-- -   Must match the identifier of an existing @DBCluster@.
failoverDBCluster_dbClusterIdentifier :: Lens.Lens' FailoverDBCluster (Prelude.Maybe Prelude.Text)
failoverDBCluster_dbClusterIdentifier = Lens.lens (\FailoverDBCluster' {dbClusterIdentifier} -> dbClusterIdentifier) (\s@FailoverDBCluster' {} a -> s {dbClusterIdentifier = a} :: FailoverDBCluster)

-- | The name of the instance to promote to the primary instance.
--
-- You must specify the instance identifier for an Amazon DocumentDB
-- replica in the cluster. For example, @mydbcluster-replica1@.
failoverDBCluster_targetDBInstanceIdentifier :: Lens.Lens' FailoverDBCluster (Prelude.Maybe Prelude.Text)
failoverDBCluster_targetDBInstanceIdentifier = Lens.lens (\FailoverDBCluster' {targetDBInstanceIdentifier} -> targetDBInstanceIdentifier) (\s@FailoverDBCluster' {} a -> s {targetDBInstanceIdentifier = a} :: FailoverDBCluster)

instance Core.AWSRequest FailoverDBCluster where
  type
    AWSResponse FailoverDBCluster =
      FailoverDBClusterResponse
  request overrides =
    Request.postQuery (overrides defaultService)
  response =
    Response.receiveXMLWrapper
      "FailoverDBClusterResult"
      ( \s h x ->
          FailoverDBClusterResponse'
            Prelude.<$> (x Data..@? "DBCluster")
            Prelude.<*> (Prelude.pure (Prelude.fromEnum s))
      )

instance Prelude.Hashable FailoverDBCluster where
  hashWithSalt _salt FailoverDBCluster' {..} =
    _salt
      `Prelude.hashWithSalt` dbClusterIdentifier
      `Prelude.hashWithSalt` targetDBInstanceIdentifier

instance Prelude.NFData FailoverDBCluster where
  rnf FailoverDBCluster' {..} =
    Prelude.rnf dbClusterIdentifier
      `Prelude.seq` Prelude.rnf targetDBInstanceIdentifier

instance Data.ToHeaders FailoverDBCluster where
  toHeaders = Prelude.const Prelude.mempty

instance Data.ToPath FailoverDBCluster where
  toPath = Prelude.const "/"

instance Data.ToQuery FailoverDBCluster where
  toQuery FailoverDBCluster' {..} =
    Prelude.mconcat
      [ "Action"
          Data.=: ("FailoverDBCluster" :: Prelude.ByteString),
        "Version"
          Data.=: ("2014-10-31" :: Prelude.ByteString),
        "DBClusterIdentifier" Data.=: dbClusterIdentifier,
        "TargetDBInstanceIdentifier"
          Data.=: targetDBInstanceIdentifier
      ]

-- | /See:/ 'newFailoverDBClusterResponse' smart constructor.
data FailoverDBClusterResponse = FailoverDBClusterResponse'
  { dbCluster :: Prelude.Maybe DBCluster,
    -- | The response's http status code.
    httpStatus :: Prelude.Int
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'FailoverDBClusterResponse' with all optional fields omitted.
--
-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
--
-- The following record fields are available, with the corresponding lenses provided
-- for backwards compatibility:
--
-- 'dbCluster', 'failoverDBClusterResponse_dbCluster' - Undocumented member.
--
-- 'httpStatus', 'failoverDBClusterResponse_httpStatus' - The response's http status code.
newFailoverDBClusterResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  FailoverDBClusterResponse
newFailoverDBClusterResponse pHttpStatus_ =
  FailoverDBClusterResponse'
    { dbCluster =
        Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | Undocumented member.
failoverDBClusterResponse_dbCluster :: Lens.Lens' FailoverDBClusterResponse (Prelude.Maybe DBCluster)
failoverDBClusterResponse_dbCluster = Lens.lens (\FailoverDBClusterResponse' {dbCluster} -> dbCluster) (\s@FailoverDBClusterResponse' {} a -> s {dbCluster = a} :: FailoverDBClusterResponse)

-- | The response's http status code.
failoverDBClusterResponse_httpStatus :: Lens.Lens' FailoverDBClusterResponse Prelude.Int
failoverDBClusterResponse_httpStatus = Lens.lens (\FailoverDBClusterResponse' {httpStatus} -> httpStatus) (\s@FailoverDBClusterResponse' {} a -> s {httpStatus = a} :: FailoverDBClusterResponse)

instance Prelude.NFData FailoverDBClusterResponse where
  rnf FailoverDBClusterResponse' {..} =
    Prelude.rnf dbCluster
      `Prelude.seq` Prelude.rnf httpStatus