AWS via Haskell Part 4 (SimpleDB)

aws-via-haskell.cabal

name:                                       aws-via-haskell
version:                                    0.1.0.0
homepage:                                   https://github.com/rcook/aws-via-haskell#readme
license:                                    MIT
license-file:                               LICENSE
author:                                     Richard Cook
maintainer:                                 [email protected]
copyright:                                  2017 Richard Cook
category:                                   Command Line
build-type:                                 Simple
cabal-version:                              >= 1.10
extra-source-files:                         README.md

source-repository head
  type:                                     git
  location:                                 https://github.com/rcook/aws-via-haskell.git

library
  default-language:                         Haskell2010
  if os(darwin)
    cpp-options:                            -DOS_MACOS
  if os(linux)
    cpp-options:                            -DOS_LINUX
  if os(windows)
    cpp-options:                            -DOS_WINDOWS
  hs-source-dirs:                           lib
  ghc-options:                              -W -Wall -fwarn-incomplete-patterns -fwarn-unused-imports
  build-depends:                            amazonka
                                          , base >= 4.7 && < 5
                                          , bytestring
                                          , lens
                                          , resourcet
                                          , text
  exposed-modules:                          AWSViaHaskell
                                          , AWSViaHaskell.AWSInfo
                                          , AWSViaHaskell.Util

executable dynamodb-app
  default-language:                         Haskell2010
  if os(darwin)
    cpp-options:                            -DOS_MACOS
  if os(linux)
    cpp-options:                            -DOS_LINUX
  if os(windows)
    cpp-options:                            -DOS_WINDOWS
  hs-source-dirs:                           dynamodb
  main-is:                                  Main.hs
  ghc-options:                              -threaded -rtsopts -with-rtsopts=-N -W -Wall -fwarn-incomplete-patterns -fwarn-unused-imports
  build-depends:                            amazonka
                                          , amazonka-dynamodb
                                          , aws-via-haskell
                                          , base >= 4.7 && < 5
                                          , lens
                                          , text
                                          , unordered-containers

executable s3-app
  default-language:                         Haskell2010
  if os(darwin)
    cpp-options:                            -DOS_MACOS
  if os(linux)
    cpp-options:                            -DOS_LINUX
  if os(windows)
    cpp-options:                            -DOS_WINDOWS
  hs-source-dirs:                           s3
  main-is:                                  Main.hs
  ghc-options:                              -threaded -rtsopts -with-rtsopts=-N -W -Wall -fwarn-incomplete-patterns -fwarn-unused-imports
  build-depends:                            amazonka
                                          , amazonka-s3
                                          , aws-via-haskell
                                          , base >= 4.7 && < 5
                                          , bytestring
                                          , conduit-extra
                                          , lens
                                          , resourcet
                                          , text

executable sdb-app
  default-language:                         Haskell2010
  if os(darwin)
    cpp-options:                            -DOS_MACOS
  if os(linux)
    cpp-options:                            -DOS_LINUX
  if os(windows)
    cpp-options:                            -DOS_WINDOWS
  hs-source-dirs:                           sdb
  main-is:                                  Main.hs
  ghc-options:                              -threaded -rtsopts -with-rtsopts=-N -W -Wall -fwarn-incomplete-patterns -fwarn-unused-imports
  build-depends:                            amazonka
                                          , amazonka-sdb
                                          , aws-via-haskell
                                          , base >= 4.7 && < 5
                                          , lens
                                          , text

executable sqs-app
  default-language:                         Haskell2010
  if os(darwin)
    cpp-options:                            -DOS_MACOS
  if os(linux)
    cpp-options:                            -DOS_LINUX
  if os(windows)
    cpp-options:                            -DOS_WINDOWS
  hs-source-dirs:                           sqs
  main-is:                                  Main.hs
  ghc-options:                              -threaded -rtsopts -with-rtsopts=-N -W -Wall -fwarn-incomplete-patterns -fwarn-unused-imports
  build-depends:                            amazonka
                                          , amazonka-sqs
                                          , aws-via-haskell
                                          , base >= 4.7 && < 5
                                          , lens
                                          , text

AWSInfo.hs

{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE RecordWildCards #-}

module AWSViaHaskell.AWSInfo
    ( AWSInfo(..)
    , LoggingState(..)
    , ServiceEndpoint(..)
    , getAWSInfo
    , withAWS
    , withAWS'
    ) where

import           Control.Lens ((<&>), set)
import           Control.Monad.Trans.AWS
                    ( AWST'
                    , runAWST
                    )
import           Control.Monad.Trans.Resource
                    ( MonadBaseControl
                    , ResourceT
                    )
import           Data.ByteString (ByteString)
import           Control.Monad.Trans.AWS
                    ( Credentials(..)
                    , Env
                    , LogLevel(..)
                    , Region(..)
                    , Service
                    , envLogger
                    , newEnv
                    , newLogger
                    , reconfigure
                    , runResourceT
                    , setEndpoint
                    , within
                    )
import           System.IO (stdout)

type HostName = ByteString

type Port = Int

data AWSInfo = AWSInfo
    { env :: Env
    , region :: Region
    , service :: Service
    }

data LoggingState = LoggingEnabled | LoggingDisabled

data ServiceEndpoint = AWS Region | Local HostName Port

getAWSInfo :: LoggingState -> ServiceEndpoint -> Service -> IO AWSInfo
getAWSInfo loggingState serviceEndpoint service = do
    e <- getEnv loggingState
    let (r, s) = regionService serviceEndpoint service
    return $ AWSInfo e r s
    where
        -- Standard discovery mechanism for credentials, log to standard output
        getEnv LoggingEnabled = do
            logger <- newLogger Debug stdout
            newEnv Discover <&> set envLogger logger
        -- Standard discovery mechanism for credentials, no logging
        getEnv LoggingDisabled = newEnv Discover

        -- Run against a DynamoDB instance running on AWS in specified region
        regionService (AWS region) s = (region, s)
        -- Run against a local DynamoDB instance on a given host and port
        regionService (Local hostName port) s = (NorthVirginia, setEndpoint False hostName port s)

withAWS :: MonadBaseControl IO m =>
    AWST' Env (ResourceT m) a
    -> AWSInfo
    -> m a
withAWS action AWSInfo{..} =
    runResourceT . runAWST env . within region $ do
        reconfigure service action

withAWS' :: MonadBaseControl IO m =>
    AWSInfo
    -> AWST' Env (ResourceT m) a
    -> m a
withAWS' = flip withAWS

LICENSE

The MIT License (MIT)

Copyright (c) 2017 Richard Cook

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Main.hs

{-# LANGUAGE OverloadedStrings #-}

module Main (main) where

import           AWSViaHaskell
                    ( AWSInfo
                    , LoggingState(..)
                    , ServiceEndpoint(..)
                    , getAWSInfo
                    , withAWS
                    )
import           Control.Lens ((&), (^.), (.~))
import           Control.Monad (forM_, void)
import           Data.Monoid ((<>))
import           Data.Text (Text)
import qualified Data.Text.IO as Text
import           Network.AWS (send)
import           Network.AWS.SDB
                    ( aName
                    , aValue
                    , createDomain
                    , garsAttributes
                    , getAttributes
                    , ldrsDomainNames
                    , listDomains
                    , paAttributes
                    , putAttributes
                    , replaceableAttribute
                    , sdb
                    )

newtype DomainName = DomainName Text deriving Show

newtype ItemName = ItemName Text deriving Show

doCreateDomainIfNotExists :: DomainName -> AWSInfo -> IO ()
doCreateDomainIfNotExists (DomainName s) = withAWS $ do
    void $ send $ createDomain s

doListDomains :: AWSInfo -> IO [DomainName]
doListDomains = withAWS $ do
    result <- send $ listDomains
    return [ DomainName s | s <- result ^. ldrsDomainNames ]

doPutAttributes :: DomainName -> ItemName -> [(Text, Text)] -> AWSInfo -> IO ()
doPutAttributes (DomainName sDN) (ItemName sIN) attrs = withAWS $ do
    void $ send $ putAttributes sDN sIN
                    & paAttributes .~ map (uncurry replaceableAttribute) attrs

doGetAttributes :: DomainName -> ItemName -> AWSInfo -> IO [(Text, Text)]
doGetAttributes (DomainName sDN) (ItemName sIN) = withAWS $ do
    result <- send $ getAttributes sDN sIN
    return [ (attr ^. aName, attr ^. aValue) | attr <- result ^. garsAttributes ]

main :: IO ()
main = do
    -- Default port for simpledb-dev2
    awsInfo <- getAWSInfo LoggingDisabled (Local "localhost" 8080) sdb

    let domainName = DomainName "my-domain"
        itemName = ItemName "my-item"

    putStrLn "CreateDomain"
    doCreateDomainIfNotExists domainName awsInfo

    putStrLn "ListDomains"
    domainNames <- doListDomains awsInfo
    forM_ domainNames $ \dn ->
        putStrLn $ "  " <> show dn

    putStrLn "PutAttributes"
    doPutAttributes domainName itemName [ ("1", "aaa"), ("2", "bbb") ] awsInfo

    putStrLn "GetAttributes"
    attrs <- doGetAttributes domainName itemName awsInfo
    forM_ attrs $ \(k, v) ->
        Text.putStrLn $ "  " <> k <> " = " <> v