{-# 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.StorageGateway.DescribeCache
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Returns information about the cache of a gateway. This operation is only
-- supported in the cached volume, tape, and file gateway types.
--
-- The response includes disk IDs that are configured as cache, and it
-- includes the amount of cache allocated and used.
module Amazonka.StorageGateway.DescribeCache
  ( -- * Creating a Request
    DescribeCache (..),
    newDescribeCache,

    -- * Request Lenses
    describeCache_gatewayARN,

    -- * Destructuring the Response
    DescribeCacheResponse (..),
    newDescribeCacheResponse,

    -- * Response Lenses
    describeCacheResponse_cacheAllocatedInBytes,
    describeCacheResponse_cacheDirtyPercentage,
    describeCacheResponse_cacheHitPercentage,
    describeCacheResponse_cacheMissPercentage,
    describeCacheResponse_cacheUsedPercentage,
    describeCacheResponse_diskIds,
    describeCacheResponse_gatewayARN,
    describeCacheResponse_httpStatus,
  )
where

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

-- | /See:/ 'newDescribeCache' smart constructor.
data DescribeCache = DescribeCache'
  { gatewayARN :: Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'DescribeCache' 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:
--
-- 'gatewayARN', 'describeCache_gatewayARN' - Undocumented member.
newDescribeCache ::
  -- | 'gatewayARN'
  Prelude.Text ->
  DescribeCache
newDescribeCache pGatewayARN_ =
  DescribeCache' {gatewayARN = pGatewayARN_}

-- | Undocumented member.
describeCache_gatewayARN :: Lens.Lens' DescribeCache Prelude.Text
describeCache_gatewayARN = Lens.lens (\DescribeCache' {gatewayARN} -> gatewayARN) (\s@DescribeCache' {} a -> s {gatewayARN = a} :: DescribeCache)

instance Core.AWSRequest DescribeCache where
  type
    AWSResponse DescribeCache =
      DescribeCacheResponse
  request overrides =
    Request.postJSON (overrides defaultService)
  response =
    Response.receiveJSON
      ( \s h x ->
          DescribeCacheResponse'
            Prelude.<$> (x Data..?> "CacheAllocatedInBytes")
            Prelude.<*> (x Data..?> "CacheDirtyPercentage")
            Prelude.<*> (x Data..?> "CacheHitPercentage")
            Prelude.<*> (x Data..?> "CacheMissPercentage")
            Prelude.<*> (x Data..?> "CacheUsedPercentage")
            Prelude.<*> (x Data..?> "DiskIds" Core..!@ Prelude.mempty)
            Prelude.<*> (x Data..?> "GatewayARN")
            Prelude.<*> (Prelude.pure (Prelude.fromEnum s))
      )

instance Prelude.Hashable DescribeCache where
  hashWithSalt _salt DescribeCache' {..} =
    _salt `Prelude.hashWithSalt` gatewayARN

instance Prelude.NFData DescribeCache where
  rnf DescribeCache' {..} = Prelude.rnf gatewayARN

instance Data.ToHeaders DescribeCache where
  toHeaders =
    Prelude.const
      ( Prelude.mconcat
          [ "X-Amz-Target"
              Data.=# ( "StorageGateway_20130630.DescribeCache" ::
                          Prelude.ByteString
                      ),
            "Content-Type"
              Data.=# ( "application/x-amz-json-1.1" ::
                          Prelude.ByteString
                      )
          ]
      )

instance Data.ToJSON DescribeCache where
  toJSON DescribeCache' {..} =
    Data.object
      ( Prelude.catMaybes
          [Prelude.Just ("GatewayARN" Data..= gatewayARN)]
      )

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

instance Data.ToQuery DescribeCache where
  toQuery = Prelude.const Prelude.mempty

-- | /See:/ 'newDescribeCacheResponse' smart constructor.
data DescribeCacheResponse = DescribeCacheResponse'
  { -- | The amount of cache in bytes allocated to a gateway.
    cacheAllocatedInBytes :: Prelude.Maybe Prelude.Integer,
    -- | The file share\'s contribution to the overall percentage of the
    -- gateway\'s cache that has not been persisted to Amazon Web Services. The
    -- sample is taken at the end of the reporting period.
    cacheDirtyPercentage :: Prelude.Maybe Prelude.Double,
    -- | Percent of application read operations from the file shares that are
    -- served from cache. The sample is taken at the end of the reporting
    -- period.
    cacheHitPercentage :: Prelude.Maybe Prelude.Double,
    -- | Percent of application read operations from the file shares that are not
    -- served from cache. The sample is taken at the end of the reporting
    -- period.
    cacheMissPercentage :: Prelude.Maybe Prelude.Double,
    -- | Percent use of the gateway\'s cache storage. This metric applies only to
    -- the gateway-cached volume setup. The sample is taken at the end of the
    -- reporting period.
    cacheUsedPercentage :: Prelude.Maybe Prelude.Double,
    -- | An array of strings that identify disks that are to be configured as
    -- working storage. Each string has a minimum length of 1 and maximum
    -- length of 300. You can get the disk IDs from the ListLocalDisks API.
    diskIds :: Prelude.Maybe [Prelude.Text],
    gatewayARN :: Prelude.Maybe Prelude.Text,
    -- | The response's http status code.
    httpStatus :: Prelude.Int
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'DescribeCacheResponse' 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:
--
-- 'cacheAllocatedInBytes', 'describeCacheResponse_cacheAllocatedInBytes' - The amount of cache in bytes allocated to a gateway.
--
-- 'cacheDirtyPercentage', 'describeCacheResponse_cacheDirtyPercentage' - The file share\'s contribution to the overall percentage of the
-- gateway\'s cache that has not been persisted to Amazon Web Services. The
-- sample is taken at the end of the reporting period.
--
-- 'cacheHitPercentage', 'describeCacheResponse_cacheHitPercentage' - Percent of application read operations from the file shares that are
-- served from cache. The sample is taken at the end of the reporting
-- period.
--
-- 'cacheMissPercentage', 'describeCacheResponse_cacheMissPercentage' - Percent of application read operations from the file shares that are not
-- served from cache. The sample is taken at the end of the reporting
-- period.
--
-- 'cacheUsedPercentage', 'describeCacheResponse_cacheUsedPercentage' - Percent use of the gateway\'s cache storage. This metric applies only to
-- the gateway-cached volume setup. The sample is taken at the end of the
-- reporting period.
--
-- 'diskIds', 'describeCacheResponse_diskIds' - An array of strings that identify disks that are to be configured as
-- working storage. Each string has a minimum length of 1 and maximum
-- length of 300. You can get the disk IDs from the ListLocalDisks API.
--
-- 'gatewayARN', 'describeCacheResponse_gatewayARN' - Undocumented member.
--
-- 'httpStatus', 'describeCacheResponse_httpStatus' - The response's http status code.
newDescribeCacheResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  DescribeCacheResponse
newDescribeCacheResponse pHttpStatus_ =
  DescribeCacheResponse'
    { cacheAllocatedInBytes =
        Prelude.Nothing,
      cacheDirtyPercentage = Prelude.Nothing,
      cacheHitPercentage = Prelude.Nothing,
      cacheMissPercentage = Prelude.Nothing,
      cacheUsedPercentage = Prelude.Nothing,
      diskIds = Prelude.Nothing,
      gatewayARN = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | The amount of cache in bytes allocated to a gateway.
describeCacheResponse_cacheAllocatedInBytes :: Lens.Lens' DescribeCacheResponse (Prelude.Maybe Prelude.Integer)
describeCacheResponse_cacheAllocatedInBytes = Lens.lens (\DescribeCacheResponse' {cacheAllocatedInBytes} -> cacheAllocatedInBytes) (\s@DescribeCacheResponse' {} a -> s {cacheAllocatedInBytes = a} :: DescribeCacheResponse)

-- | The file share\'s contribution to the overall percentage of the
-- gateway\'s cache that has not been persisted to Amazon Web Services. The
-- sample is taken at the end of the reporting period.
describeCacheResponse_cacheDirtyPercentage :: Lens.Lens' DescribeCacheResponse (Prelude.Maybe Prelude.Double)
describeCacheResponse_cacheDirtyPercentage = Lens.lens (\DescribeCacheResponse' {cacheDirtyPercentage} -> cacheDirtyPercentage) (\s@DescribeCacheResponse' {} a -> s {cacheDirtyPercentage = a} :: DescribeCacheResponse)

-- | Percent of application read operations from the file shares that are
-- served from cache. The sample is taken at the end of the reporting
-- period.
describeCacheResponse_cacheHitPercentage :: Lens.Lens' DescribeCacheResponse (Prelude.Maybe Prelude.Double)
describeCacheResponse_cacheHitPercentage = Lens.lens (\DescribeCacheResponse' {cacheHitPercentage} -> cacheHitPercentage) (\s@DescribeCacheResponse' {} a -> s {cacheHitPercentage = a} :: DescribeCacheResponse)

-- | Percent of application read operations from the file shares that are not
-- served from cache. The sample is taken at the end of the reporting
-- period.
describeCacheResponse_cacheMissPercentage :: Lens.Lens' DescribeCacheResponse (Prelude.Maybe Prelude.Double)
describeCacheResponse_cacheMissPercentage = Lens.lens (\DescribeCacheResponse' {cacheMissPercentage} -> cacheMissPercentage) (\s@DescribeCacheResponse' {} a -> s {cacheMissPercentage = a} :: DescribeCacheResponse)

-- | Percent use of the gateway\'s cache storage. This metric applies only to
-- the gateway-cached volume setup. The sample is taken at the end of the
-- reporting period.
describeCacheResponse_cacheUsedPercentage :: Lens.Lens' DescribeCacheResponse (Prelude.Maybe Prelude.Double)
describeCacheResponse_cacheUsedPercentage = Lens.lens (\DescribeCacheResponse' {cacheUsedPercentage} -> cacheUsedPercentage) (\s@DescribeCacheResponse' {} a -> s {cacheUsedPercentage = a} :: DescribeCacheResponse)

-- | An array of strings that identify disks that are to be configured as
-- working storage. Each string has a minimum length of 1 and maximum
-- length of 300. You can get the disk IDs from the ListLocalDisks API.
describeCacheResponse_diskIds :: Lens.Lens' DescribeCacheResponse (Prelude.Maybe [Prelude.Text])
describeCacheResponse_diskIds = Lens.lens (\DescribeCacheResponse' {diskIds} -> diskIds) (\s@DescribeCacheResponse' {} a -> s {diskIds = a} :: DescribeCacheResponse) Prelude.. Lens.mapping Lens.coerced

-- | Undocumented member.
describeCacheResponse_gatewayARN :: Lens.Lens' DescribeCacheResponse (Prelude.Maybe Prelude.Text)
describeCacheResponse_gatewayARN = Lens.lens (\DescribeCacheResponse' {gatewayARN} -> gatewayARN) (\s@DescribeCacheResponse' {} a -> s {gatewayARN = a} :: DescribeCacheResponse)

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

instance Prelude.NFData DescribeCacheResponse where
  rnf DescribeCacheResponse' {..} =
    Prelude.rnf cacheAllocatedInBytes
      `Prelude.seq` Prelude.rnf cacheDirtyPercentage
      `Prelude.seq` Prelude.rnf cacheHitPercentage
      `Prelude.seq` Prelude.rnf cacheMissPercentage
      `Prelude.seq` Prelude.rnf cacheUsedPercentage
      `Prelude.seq` Prelude.rnf diskIds
      `Prelude.seq` Prelude.rnf gatewayARN
      `Prelude.seq` Prelude.rnf httpStatus