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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/Network/Fluent/Logger.hs b/Network/Fluent/Logger.hs new file mode 100644 --- /dev/null +++ b/Network/Fluent/Logger.hs @@ -0,0 +1,192 @@ +-- +-- Copyright (C) 2012 Noriyuki OHKAWA +-- +-- Licensed under the Apache License, Version 2.0 (the "License"); +-- you may not use this file except in compliance with the License. +-- You may obtain a copy of the License at +-- +-- http://www.apache.org/licenses/LICENSE-2.0 +-- +-- Unless required by applicable law or agreed to in writing, software +-- distributed under the License is distributed on an "AS IS" BASIS, +-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +-- See the License for the specific language governing permissions and +-- limitations under the License. +-- +{-# LANGUAGE OverloadedStrings #-} +{-# LANGUAGE DoRec #-} +-- | Fluent Logger for Haskell +module Network.Fluent.Logger + ( -- * Logger + FluentLogger + , withFluentLogger + , newFluentLogger + , closeFluentLogger + -- * Settings + , FluentSettings(..) + , defaultFluentSettings + -- * Post + , post + , postWithTime + ) where + +import qualified Data.ByteString as BS +import Data.ByteString.Char8 ( unpack ) +import qualified Data.ByteString.Lazy as LBS +import Data.Monoid ( mconcat ) +import Data.Time ( getCurrentTime, formatTime ) +import qualified Network.Socket as NS +import Network.Socket.Options ( setRecvTimeout, setSendTimeout ) +import Network.Socket.ByteString.Lazy ( sendAll ) +import Control.Monad ( void, forever, when ) +import Control.Applicative ( (<$>) ) +import Control.Concurrent ( ThreadId, forkIO, killThread ) +import Control.Concurrent.STM ( atomically + , TChan, newTChanIO, readTChan, peekTChan, writeTChan + , TVar, newTVarIO, readTVar, modifyTVar ) +import Control.Exception ( SomeException, handle, bracket, throwIO ) +import System.Locale ( defaultTimeLocale ) +import Data.MessagePack ( Packable, pack ) +import Data.Int ( Int64 ) + +-- | Fluent logger settings +-- +-- Since 0.1.0.0 +-- +data FluentSettings = + FluentSettings + { fluentSettingsTag :: BS.ByteString + , fluentSettingsHost :: BS.ByteString + , fluentSettingsPort :: Int + , fluentSettingsTimeout :: Double + , fluentSettingsBufferLimit :: Int64 + } + +-- | Default fluent logger settings +-- +-- Since 0.1.0.0 +-- +defaultFluentSettings :: FluentSettings +defaultFluentSettings = + FluentSettings + { fluentSettingsTag = BS.empty + , fluentSettingsHost = "localhost" + , fluentSettingsPort = 24224 + , fluentSettingsTimeout = 3.0 + , fluentSettingsBufferLimit = 1024*1024 + } + +-- | Fluent logger +-- +-- Since 0.1.0.0 +-- +data FluentLogger = + FluentLogger + { fluentLoggerChan :: TChan LBS.ByteString + , fluentLoggerBuffered :: TVar Int64 + , fluentLoggerSettings :: FluentSettings + , fluentLoggerThread :: ThreadId + } + +getSocket :: BS.ByteString -> Int -> Int64 -> IO NS.Socket +getSocket host port timeout = do + let hints = NS.defaultHints { NS.addrFlags = [NS.AI_ADDRCONFIG] + , NS.addrSocketType = NS.Stream + } + (addr:_) <- NS.getAddrInfo (Just hints) (Just $ unpack host) (Just $ show port) + sock <- NS.socket (NS.addrFamily addr) (NS.addrSocketType addr) (NS.addrProtocol addr) + setRecvTimeout sock timeout + setSendTimeout sock timeout + let onErr :: SomeException -> IO a + onErr e = NS.sClose sock >> throwIO e + handle onErr $ do + NS.connect sock $ NS.addrAddress addr + return sock + +sender :: FluentLogger -> IO () +sender logger = forever $ connectFluent logger >>= sendFluent logger + +connectFluent :: FluentLogger -> IO NS.Socket +connectFluent logger = handle (retry logger) (getSocket host port timeout) + where + host = fluentSettingsHost $ fluentLoggerSettings logger + port = fluentSettingsPort $ fluentLoggerSettings logger + timeout = round $ fluentSettingsTimeout (fluentLoggerSettings logger) * 1000000 + retry :: FluentLogger -> SomeException -> IO NS.Socket + retry = const . connectFluent + +sendFluent :: FluentLogger -> NS.Socket -> IO () +sendFluent logger sock = handle (done sock) $ do + entry <- atomically $ peekTChan chan + sendAll sock entry + atomically $ do + void $ readTChan chan + modifyTVar buffered (subtract $ LBS.length entry) + sendFluent logger sock + where + chan = fluentLoggerChan logger + buffered = fluentLoggerBuffered logger + done :: NS.Socket -> SomeException -> IO () + done = const . NS.sClose + +-- | Create a fluent logger +-- +-- Since 0.1.0.0 +-- +newFluentLogger :: FluentSettings -> IO FluentLogger +newFluentLogger set = do + tchan <- newTChanIO + tvar <- newTVarIO 0 + let mkLogger tid = FluentLogger { fluentLoggerChan = tchan + , fluentLoggerBuffered = tvar + , fluentLoggerSettings = set + , fluentLoggerThread = tid + } + rec logger <- mkLogger <$> forkIO (sender logger) + return logger + +-- | Close logger +-- +-- Since 0.1.0.0 +-- +closeFluentLogger :: FluentLogger -> IO () +closeFluentLogger = killThread . fluentLoggerThread + +-- | Create a fluent logger and run given action. +-- +-- Since 0.1.0.0 +-- +withFluentLogger :: FluentSettings -> (FluentLogger -> IO a) -> IO a +withFluentLogger set = bracket (newFluentLogger set) closeFluentLogger + +getCurrentEpochTime :: IO Int +getCurrentEpochTime = + read . formatTime defaultTimeLocale "%s" <$> getCurrentTime + +-- | Post a message. +-- +-- Since 0.1.0.0 +-- +post :: Packable a => FluentLogger -> BS.ByteString -> a -> IO () +post logger label obj = do + time <- getCurrentEpochTime + postWithTime logger label time obj + +-- | Post a message with given time. +-- +-- Since 0.1.0.0 +-- +postWithTime :: Packable a => FluentLogger -> BS.ByteString -> Int -> a -> IO () +postWithTime logger label time obj = atomically $ do + s <- readTVar buffered + when (s + len <= limit) $ do + writeTChan chan entry + modifyTVar buffered (+ len) + where + tag = fluentSettingsTag $ fluentLoggerSettings logger + lbl = if BS.null label then tag else mconcat [ tag, ".", label ] + entry = pack ( lbl, time, obj ) + len = LBS.length entry + chan = fluentLoggerChan logger + buffered = fluentLoggerBuffered logger + limit = fluentSettingsBufferLimit $ fluentLoggerSettings logger diff --git a/Setup.hs b/Setup.hs new file mode 100644 --- /dev/null +++ b/Setup.hs @@ -0,0 +1,2 @@ +import Distribution.Simple +main = defaultMain diff --git a/benchmark/benchmark.hs b/benchmark/benchmark.hs new file mode 100644 --- /dev/null +++ b/benchmark/benchmark.hs @@ -0,0 +1,14 @@ +{-# LANGUAGE OverloadedStrings #-} +import Network.Fluent.Logger +import Criterion.Main + +set :: FluentSettings +set = defaultFluentSettings { fluentSettingsTag = "debug" + , fluentSettingsHost = "127.0.0.1" + } + +main :: IO () +main = withFluentLogger set $ \logger -> do + defaultMain [ bgroup "post" [ bench "1 to 1000" $ nfIO $ mapM_ (post logger "loop") [1..1000::Int] + ] + ] diff --git a/fluent-logger.cabal b/fluent-logger.cabal new file mode 100644 --- /dev/null +++ b/fluent-logger.cabal @@ -0,0 +1,56 @@ +name: fluent-logger +version: 0.1.0.0 +synopsis: A structured logger for Fluentd (Haskell) +description: A structured logger for Fluentd (Haskell) +license: OtherLicense +license-file: LICENSE +author: Noriyuki OHKAWA +maintainer: Noriyuki OHKAWA +copyright: Copyright (c) 2012, Noriyuki OHKAWA +category: Network +build-type: Simple +cabal-version: >=1.8 +tested-with: GHC ==7.4.2 + +source-repository head + type: git + location: https://github.com/notogawa/fluent-logger-haskell.git + +library + exposed-modules: Network.Fluent.Logger + ghc-options: -Wall + build-depends: base ==4.* + , bytestring + , network >=2.3.0.13 && <2.5 + , network-socket-options >=0.1 && <0.3 + , time >=1.2.0.3 + , old-locale + , msgpack >=0.7.1 && <0.8 + , stm >=2.3 + +test-suite fluent-logger-spec + hs-source-dirs: test + type: exitcode-stdio-1.0 + main-is: Spec.hs + other-modules: MockServer + , Network.Fluent.LoggerSpec + build-depends: base ==4.* + , fluent-logger + , network + , msgpack + , network-conduit + , conduit + , bytestring + , transformers + , hspec + , attoparsec + , old-locale + , time + +benchmark fluent-logger-benchmark + hs-source-dirs: benchmark + type: exitcode-stdio-1.0 + main-is: benchmark.hs + build-depends: base ==4.* + , fluent-logger + , criterion diff --git a/test/MockServer.hs b/test/MockServer.hs new file mode 100644 --- /dev/null +++ b/test/MockServer.hs @@ -0,0 +1,68 @@ +{-# LANGUAGE OverloadedStrings #-} +module MockServer + ( + MockServer + , mockServerHost + , mockServerPort + , withMockServer + , recvMockServer + ) where + +import Data.Conduit +import Data.Conduit.Network +import Data.ByteString ( ByteString ) +import Control.Concurrent +import Control.Monad.IO.Class +import Control.Exception +import Data.MessagePack ( Unpackable, get ) +import Data.Attoparsec +import Data.Monoid + +data MockServer a = MockServer { mockServerChan :: Chan a + , mockServerThread :: ThreadId + } + +mockServerHost :: ByteString +mockServerHost = "127.0.0.1" + +mockServerPort :: Int +mockServerPort = 24224 + +mockServerSettings :: ServerSettings IO +mockServerSettings = serverSettings mockServerPort HostAny + +app :: (MonadIO m, Unpackable a) => Chan a -> AppData m -> m () +app chan ad = appSource ad $$ sinkChan chan "" + +sinkChan :: (MonadIO m, Unpackable a) => Chan a -> ByteString -> Sink ByteString m () +sinkChan chan carry = do + mx <- await + case mx of + Nothing -> return () + Just x -> parseAsPossible chan (carry <> x) >>= sinkChan chan + +parseAsPossible :: (MonadIO m, Unpackable a) => Chan a -> ByteString -> m ByteString +parseAsPossible chan src = + case parse get src of + Done t r -> liftIO (writeChan chan r) >> parseAsPossible chan t + _ -> return src + +withMockServer :: Unpackable a => (MockServer a -> IO ()) -> IO () +withMockServer = bracket runMockServer stopMockServer + +recvMockServer :: Unpackable a => MockServer a -> IO a +recvMockServer server = readChan (mockServerChan server) + +runMockServer :: Unpackable a => IO (MockServer a) +runMockServer = do + chan <- newChan + tid <- forkIO $ runTCPServer mockServerSettings $ app chan + threadDelay 10000 + return MockServer { mockServerChan = chan + , mockServerThread = tid + } + +stopMockServer :: Unpackable a => MockServer a -> IO () +stopMockServer server = do + killThread $ mockServerThread server + threadDelay 10000 diff --git a/test/Network/Fluent/LoggerSpec.hs b/test/Network/Fluent/LoggerSpec.hs new file mode 100644 --- /dev/null +++ b/test/Network/Fluent/LoggerSpec.hs @@ -0,0 +1,114 @@ +{-# LANGUAGE OverloadedStrings #-} +module Network.Fluent.LoggerSpec ( spec ) where + +import Control.Applicative +import Control.Concurrent +import Control.Monad +import Data.ByteString ( ByteString ) +import Data.MessagePack +import Data.Time ( getCurrentTime, formatTime ) +import System.Locale ( defaultTimeLocale ) +import Test.Hspec + +import Network.Fluent.Logger +import MockServer + +spec :: Spec +spec = do + describe "post" $ do + it "posts a message" postPostsMessage + it "keeps message order" postKeepsMessageOrder + it "buffers message if server down" postBuffersMessageIfServerDown + -- it "buffers message if lost connection" postBuffersMessageIfLostConnection + -- it "losts message if buffer is over" postLostsMessageIfBufferIsOver + describe "postWithTime" $ do + it "posts a message with given time" postWithTimePostsMessageWithGivenTime + + +postSettings = + defaultFluentSettings { fluentSettingsTag = "post" + , fluentSettingsHost = mockServerHost + , fluentSettingsPort = mockServerPort + } + +postWithTimeSettings = + defaultFluentSettings { fluentSettingsTag = "postWithTime" + , fluentSettingsHost = mockServerHost + , fluentSettingsPort = mockServerPort + } + +getCurrentEpochTime :: IO Int +getCurrentEpochTime = + read . formatTime defaultTimeLocale "%s" <$> getCurrentTime + +postPostsMessage :: IO () +postPostsMessage = + withFluentLogger postSettings $ \logger -> do + let label = "PostsMessage" + withMockServer $ \server -> do + preTime <- getCurrentEpochTime + post logger label ( "test" :: String ) + postTime <- getCurrentEpochTime + (tag, time, content) <- recvMockServer server :: IO (ByteString, Int, String) + tag `shouldBe` "post.PostsMessage" + content `shouldBe` "test" + +postKeepsMessageOrder :: IO () +postKeepsMessageOrder = + withFluentLogger postSettings $ \logger -> do + let label = "KeepsMessageOrder" + withMockServer $ \server -> do + let xs = [1..1024::Int] + mapM_ (post logger label) xs + forM_ xs $ \n -> do + (_, _, content) <- recvMockServer server :: IO (ByteString, Int, Int) + content `shouldBe` n + +postBuffersMessageIfServerDown :: IO () +postBuffersMessageIfServerDown = + withFluentLogger postSettings $ \logger -> do + let label = "BuffersMessageIfServerDown" + post logger label ( 1 :: Int ) + withMockServer $ \server -> do + post logger label ( 2 :: Int ) + (_, _, content) <- recvMockServer server :: IO (ByteString, Int, Int) + content `shouldBe` 1 + (_, _, content) <- recvMockServer server + content `shouldBe` 2 + +postBuffersMessageIfLostConnection :: IO () +postBuffersMessageIfLostConnection = + withFluentLogger postSettings $ \logger -> do + let label = "BuffersMessageIfLostConnection" + withMockServer $ \server -> do + post logger label ( 1 :: Int ) + (_, _, content) <- recvMockServer server :: IO (ByteString, Int, Int) + content `shouldBe` 1 + post logger label ( 2 :: Int ) + withMockServer $ \server -> do + post logger label ( 3 :: Int ) + (_, _, content) <- recvMockServer server :: IO (ByteString, Int, Int) + content `shouldBe` 2 + (_, _, content) <- recvMockServer server :: IO (ByteString, Int, Int) + content `shouldBe` 3 + +postLostsMessageIfBufferIsOver :: IO () +postLostsMessageIfBufferIsOver = + withFluentLogger postSettings $ \logger -> do + let label = "LostsMessageIfBufferIsOver" + post logger label ( 1 :: Int ) + withMockServer $ \server -> do + post logger label ( 2 :: Int ) + (_, _, content) <- recvMockServer server :: IO (ByteString, Int, Int) + content `shouldBe` 2 + +postWithTimePostsMessageWithGivenTime :: IO () +postWithTimePostsMessageWithGivenTime = + withFluentLogger postWithTimeSettings $ \logger -> do + let label = "PostsMessageWithGivenTime" + withMockServer $ \server -> do + postWithTime logger label 123456 ( "test" :: String ) + (tag, time, content) <- recvMockServer server :: IO (ByteString, Int, String) + tag `shouldBe` "postWithTime.PostsMessageWithGivenTime" + time `shouldBe` 123456 + content `shouldBe` "test" diff --git a/test/Spec.hs b/test/Spec.hs new file mode 100644 --- /dev/null +++ b/test/Spec.hs @@ -0,0 +1,1 @@ +{-# OPTIONS_GHC -F -pgmF cabal-dev/bin/hspec-discover #-}