haskell-bee-pgmq (empty) → 0.1.0.0
raw patch · 7 files changed
+1246/−0 lines, 7 filesdep +aesondep +basedep +bytestring
Dependencies added: aeson, base, bytestring, containers, deepseq, haskell-bee, haskell-bee-pgmq, haskell-bee-tests, haskell-pgmq, hspec, mtl, postgresql-libpq, postgresql-simple, random-strings, safe, safe-exceptions, scientific, tasty, tasty-hspec, text, time, units, unix-time
Files
- LICENSE +661/−0
- README.md +28/−0
- bin/simple-worker/Main.hs +131/−0
- haskell-bee-pgmq.cabal +182/−0
- src/Async/Worker/Broker/PGMQ.hs +166/−0
- tests/Test/Integration/PGMQ.hs +53/−0
- tests/integration-tests.hs +25/−0
+ LICENSE view
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+ README.md view
@@ -0,0 +1,28 @@+# haskell-bee-pgmq++PostgreSQL/PGMQ broker implementation for [haskell-bee](https://github.com/garganscript/haskell-bee).++This package provides a PostgreSQL-backed message queue broker using [PGMQ](https://github.com/tembo-io/pgmq) (PostgreSQL Message Queue).++## Database initialization++Notice that upon broker initialization, this calls `PGMQ.initialize`+which tries very hard to create the pgmq schema for you.++If you also want to pre-create the database itself, with some given+user, you can try something like this:++```haskell+import Shelly qualified as SH++createDBIfNotExists :: Text -> Text -> IO ()+createDBIfNotExists connStr dbName = do+ -- For the \gexec trick, see:+ -- https://stackoverflow.com/questions/18389124/simulate-create-database-if-not-exists-for-postgresql+ (_res, _ec) <- SH.shelly $ SH.silently $ SH.escaping False $ do+ let sql = "\"SELECT 'CREATE DATABASE " <> dbName <> "' WHERE NOT EXISTS (SELECT FROM pg_database WHERE datname = '" <> dbName <> "')\\gexec\""+ result <- SH.run "echo" [sql, "|", "psql", "-d", "\"" <> connStr <> "\""]+ (result,) <$> SH.lastExitCode+ + return ()+```
+ bin/simple-worker/Main.hs view
@@ -0,0 +1,131 @@+{-# LANGUAGE QuasiQuotes #-}++{-+A very simple worker to test Database.PGMQ.Worker.+-}+ +module Main+where++import Async.Worker (sendJob', mkDefaultSendJob, mkDefaultSendJob', SendJob(..), run)+import Async.Worker.Broker.PGMQ (PGMQBroker, BrokerInitParams(PGMQBrokerInitParams))+import Async.Worker.Broker.Types (Broker, getMessage, toA, initBroker, renderQueue)+import Async.Worker.Types (State(..), PerformAction, getJob, formatStr, TimeoutStrategy(..), Job)+import Control.Applicative ((<|>))+import Control.Concurrent (forkIO, threadDelay)+import Control.Exception (Exception, throwIO)+import Control.Monad (void)+import Data.Aeson (FromJSON(..), ToJSON(..), object, (.=), (.:), withObject, withText)+import Data.Text qualified as T+import Database.PostgreSQL.Simple qualified as PSQL+import Database.PGMQ.Simple qualified as PGMQ+-- import Database.PGMQ.Worker qualified as PGMQW+++data SimpleException = SimpleException String+ deriving Show+instance Exception SimpleException+ ++data Message =+ Ping+ | Echo String+ | Wait Int+ | Error String+ deriving (Eq, Show)+instance ToJSON Message where+ toJSON Ping = toJSON ("ping" :: String)+ toJSON (Echo s) = toJSON $ object [ ("echo" .= s) ]+ toJSON (Wait s) = toJSON $ object [ ("wait" .= s) ]+ toJSON (Error e) = toJSON $ object [ ("error" .= e) ]+instance FromJSON Message where+ parseJSON v = parsePing v <|> parseEcho v <|> parseWait v <|> parseError v+ where+ parsePing = withText "Message (Ping)" $ \s -> do+ case s of+ "ping" -> pure Ping+ s' -> fail $ T.unpack s'+ parseEcho = withObject "Message (Echo)" $ \o -> do+ s <- o .: "echo"+ return $ Echo s+ parseWait = withObject "Message (Wait)" $ \o -> do+ s <- o .: "wait"+ return $ Wait s+ parseError = withObject "Message (Error)" $ \o -> do+ e <- o .: "error"+ return $ Error e++ +performAction' :: PerformAction PGMQBroker Message+performAction' s brokerMessage = do+ let job = toA $ getMessage brokerMessage+ case getJob job of+ Ping -> putStrLn $ formatStr s "ping"+ Echo str -> putStrLn $ formatStr s ("echo " <> str)+ Wait int -> do + putStrLn $ formatStr s ( "waiting " <> show int <> " seconds")+ threadDelay (int*second)+ Error err -> do+ putStrLn $ formatStr s ("error " <> err)+ throwIO $ SimpleException $ "Error " <> err++second :: Int+second = 1000000+ +main :: IO ()+main = do+ let connInfo = PSQL.defaultConnectInfo { PSQL.connectUser = "postgres"+ , PSQL.connectDatabase = "postgres" }+ let brokerInitParams = PGMQBrokerInitParams connInfo 10 :: BrokerInitParams PGMQBroker (Job Message)++ let queue = "simple_worker"+ + -- let workersLst = [1, 2, 3, 4] :: [Int]+ let workersLst = [1, 2] :: [Int]+ -- let tasksLst = [101, 102, 102, 103, 104, 105, 106, 107] :: [Int]+ let tasksLst = [101] :: [Int]+ -- let tasksLst = [] :: [Int]++ mapM_ (\idx -> do+ broker <- initBroker brokerInitParams :: IO (Broker PGMQBroker (Job Message))+ let state = State { broker+ , queueName = queue+ , name = "worker " <> show idx+ , performAction = performAction'+ , onMessageReceived = Nothing+ , onJobFinish = Nothing+ , onJobTimeout = Nothing+ , onJobError = Nothing+ , onWorkerKilledSafely = Nothing }+ forkIO $ run state+ ) workersLst+ + -- delay so that the worker can initialize and settle+ threadDelay second++ conn <- PSQL.connect connInfo+ broker <- initBroker brokerInitParams :: IO (Broker PGMQBroker (Job Message))++ -- SendJob wrapper+ let mkJob msg = mkDefaultSendJob' broker queue msg+ + mapM_ (\idx -> do+ void $ sendJob' $ mkJob $ Ping+ void $ sendJob' $ mkJob $ Wait 1+ void $ sendJob' $ mkJob $ Echo $ "hello " <> show idx+ void $ sendJob' $ mkJob $ Error $ "error " <> show idx+ ) tasksLst++ -- a job that will timeout+ let timedOut =+ (mkDefaultSendJob broker queue (Wait 5) 1)+ { toStrat = TSRepeatNElseArchive 3 }+ void $ sendJob' timedOut+ + threadDelay (10*second)++ metrics <- PGMQ.getMetrics conn (renderQueue queue)+ putStrLn $ "metrics: " <> show metrics++ return ()+
+ haskell-bee-pgmq.cabal view
@@ -0,0 +1,182 @@+cabal-version: 3.4+-- The cabal-version field refers to the version of the .cabal specification,+-- and can be different from the cabal-install (the tool) version and the+-- Cabal (the library) version you are using. As such, the Cabal (the library)+-- version used must be equal or greater than the version stated in this field.+-- Starting from the specification version 2.2, the cabal-version field must be+-- the first thing in the cabal file.++-- Initial package description 'haskell-pgmq' generated by+-- 'cabal init'. For further documentation, see:+-- http://haskell.org/cabal/users-guide/+--+-- The name of the package.+name: haskell-bee-pgmq++-- The package version.+-- See the Haskell package versioning policy (PVP) for standards+-- guiding when and how versions should be incremented.+-- https://pvp.haskell.org+-- PVP summary: +-+------- breaking API changes+-- | | +----- non-breaking API additions+-- | | | +--- code changes with no API change+version: 0.1.0.0++-- A short (one-line) description of the package.+synopsis: PostgreSQL/PGMQ broker implementation for haskell-bee+ +-- Extra doc files to be distributed with the package, such as a CHANGELOG or a README.+extra-doc-files: README.md++-- A longer description of the package.+description: + Please see the README on GitHub at <https://github.com/garganscript/haskell-bee/blob/master/haskell-bee-pgmq/README.md>+ +-- URL for the project homepage or repository.+homepage: https://gitlab.iscpif.fr/gargantext/haskell-bee++-- The license under which the package is released.+license: AGPL-3.0-or-later++-- The file containing the license text.+license-file: LICENSE++-- The package author(s).+author: Gargantext++-- An email address to which users can send suggestions, bug reports, and patches.+maintainer: gargantext@iscpif.fr++-- A copyright notice.+-- copyright:+category: Concurrency+build-type: Simple++-- Extra doc files to be distributed with the package, such as a CHANGELOG or a README.+-- extra-doc-files: CHANGELOG.md+-- , README.md++-- Extra source files to be distributed with the package, such as examples, or a tutorial module.+-- extra-source-files:++common warnings+ ghc-options: -Wall++library+ -- Import common warning flags.+ import: warnings++ -- Modules exported by the library.+ exposed-modules: Async.Worker.Broker.PGMQ++ -- Modules included in this library but not exported.+ -- other-modules:++ -- LANGUAGE extensions used by modules in this package.+ -- other-extensions:++ -- Other library packages from which modules are imported.+ build-depends: base >=4.17.2.0 && < 5+ , aeson >= 2.1 && < 2.3+ , bytestring >= 0.11 && < 0.13+ , containers >= 0.6.7 && < 0.8+ , deepseq >= 1.0.0.0 && < 1.7+ , haskell-pgmq >= 0.1.0.0 && < 0.2+ , postgresql-libpq >= 0.10 && <= 0.11+ , postgresql-simple >= 0.6 && < 0.8+ , safe >= 0.3 && < 0.4+ , safe-exceptions >= 0.1.7 && < 0.2+ , scientific >= 0.3.7.0 && < 0.4+ , text >= 1.2 && < 2.2+ , time >= 1.10 && < 1.15+ , units >= 2.4 && < 2.5+ , unix-time >= 0.4.11 && < 0.5+++ , haskell-bee ^>= 0.1.0.0++ -- Directories containing source files.+ hs-source-dirs: src++ -- Base language which the package is written in.+ default-language: Haskell2010++ default-extensions:+ DuplicateRecordFields+ GeneralizedNewtypeDeriving+ ImportQualifiedPost+ NamedFieldPuns+ NumericUnderscores+ OverloadedStrings+ RecordWildCards+ +executable simple-worker+ -- Import common warning flags.+ import: warnings++ build-depends: base >=4.17.2.0 && < 5+ , aeson >= 2.1 && < 2.3+ , haskell-pgmq >= 0.1.0.0 && < 0.2+ , mtl >= 2.2 && < 2.4+ , postgresql-simple >= 0.6 && < 0.8+ , text >= 1.2 && < 2.2+ + , haskell-bee ^>= 0.1.0.0+ , haskell-bee-pgmq++ -- Directories containing source files.+ hs-source-dirs: bin/simple-worker+ main-is: Main.hs++ -- Base language which the package is written in.+ default-language: Haskell2010++ default-extensions:+ DuplicateRecordFields+ GeneralizedNewtypeDeriving+ ImportQualifiedPost+ NamedFieldPuns+ OverloadedStrings+ RecordWildCards++ ghc-options: -threaded++test-suite pgmq-test-integration+ -- Import common warning flags.+ import: warnings+ + type: exitcode-stdio-1.0++ other-modules: Test.Integration.PGMQ+ + build-depends: base >=4.17.2.0 && < 5+ , aeson >= 2.1 && < 2.3+ , containers >= 0.6 && < 0.8+ , hspec >= 2.11 && < 3+ , postgresql-simple >= 0.6 && < 0.8+ , random-strings == 0.1.1.0+ , tasty >= 1.5 && < 1.6+ , tasty-hspec >= 1.2.0 && < 2+ , text >= 1.2 && < 2.2+ + , haskell-bee ^>= 0.1.0.0+ , haskell-bee-tests ^>= 0.1.0.0+ , haskell-bee-pgmq++ -- Directories containing source files.+ hs-source-dirs: tests+ main-is: integration-tests.hs++ -- Base language which the package is written in.+ default-language: Haskell2010++ default-extensions:+ DeriveGeneric+ DuplicateRecordFields+ GeneralizedNewtypeDeriving+ ImportQualifiedPost+ NamedFieldPuns+ OverloadedStrings+ RecordWildCards++ ghc-options: -threaded
+ src/Async/Worker/Broker/PGMQ.hs view
@@ -0,0 +1,166 @@+{-# LANGUAGE DeriveAnyClass #-}+{-# LANGUAGE DeriveGeneric #-}+{-# LANGUAGE DerivingStrategies #-}+{-# LANGUAGE StandaloneDeriving #-}+{-|+Module : Async.Worker.Broker.PGMQ+Description : PGMQ broker implementation+Copyright : (c) Gargantext, 2024-Present+License : AGPL+Maintainer : gargantext@iscpif.fr+Stability : experimental+Portability : POSIX+-}++{-# LANGUAGE FlexibleInstances #-}+{-# LANGUAGE MultiParamTypeClasses #-}+{-# LANGUAGE ScopedTypeVariables #-}+{-# LANGUAGE TypeFamilies #-}+{-# LANGUAGE ViewPatterns #-}+ +module Async.Worker.Broker.PGMQ+ ( PGMQBroker+ , BrokerInitParams(..) )+where++import Async.Worker.Broker.Types (MessageBroker(..), SerializableMessage, renderQueue, TimeoutS(..))+import Data.ByteString qualified as BS+import Control.Concurrent (threadDelay)+import Control.Concurrent.MVar (withMVar)+import Control.DeepSeq+import Data.Aeson (FromJSON(..), ToJSON(..), withScientific)+import Data.Scientific (floatingOrInteger)+import Database.PostgreSQL.LibPQ qualified as LibPQ+import Database.PostgreSQL.Simple qualified as PSQL+import Database.PostgreSQL.Simple.Internal qualified as PSQLInternal+import Database.PGMQ qualified as PGMQ+import GHC.Generics++data PGMQBroker++instance (SerializableMessage a, Show a) => MessageBroker PGMQBroker a where+ data Broker PGMQBroker a =+ PGMQBroker' {+ conn :: PSQL.Connection+ -- | This is the default visibility timeout.+ -- It is important to set this to something > 0, otherwise 2+ -- workers might get the same message at the same time.+ -- This value doesn't need to be large, because later you can specify+ -- 'timeout' setting in job metadata.+ -- See: https://tembo.io/pgmq/#visibility-timeout-vt+ , defaultVt :: PGMQ.VisibilityTimeout+ }+ newtype BrokerMessage PGMQBroker a = PGMQBM (PGMQ.Message a)+ deriving (Show)+ newtype Message PGMQBroker a = PGMQM a+ newtype MessageId PGMQBroker = PGMQMid Int+ deriving (Eq, Show, Ord, Generic)+ data BrokerInitParams PGMQBroker a =+ PGMQBrokerInitParams PSQL.ConnectInfo PGMQ.VisibilityTimeout+ | PGMQBrokerInitConnStr BS.ByteString PGMQ.VisibilityTimeout++ messageId (PGMQBM (PGMQ.Message { msgId })) = PGMQMid msgId+ getMessage (PGMQBM (PGMQ.Message { message })) = PGMQM message+ toMessage message = PGMQM message+ toA (PGMQM message) = message+ initBroker (PGMQBrokerInitParams connInfo defaultVt) = do+ initBroker (PGMQBrokerInitConnStr (PSQL.postgreSQLConnectionString connInfo) defaultVt)+ initBroker (PGMQBrokerInitConnStr connStr defaultVt) = do+ conn <- PSQL.connectPostgreSQL connStr+ -- PGMQ is quite verbose because of initialization. We can disable+ -- notices+ -- https://hackage.haskell.org/package/postgresql-simple-0.7.0.0/docs/src/Database.PostgreSQL.Simple.Internal.html#Connection+ -- https://hackage.haskell.org/package/postgresql-libpq-0.10.1.0/docs/Database-PostgreSQL-LibPQ.html#g:13+ -- https://www.postgresql.org/docs/current/libpq-notice-processing.html+ withMVar (PSQLInternal.connectionHandle conn) $ \c -> do+ LibPQ.disableNoticeReporting c+ PGMQ.initialize conn+ pure $ PGMQBroker' { conn, defaultVt }+ deinitBroker (PGMQBroker' { conn }) = PSQL.close conn+ + createQueue (PGMQBroker' { conn }) (renderQueue -> queue) = do+ PGMQ.createQueue conn queue++ dropQueue (PGMQBroker' { conn }) (renderQueue -> queue) = do+ PGMQ.dropQueue conn queue++ readMessageWaiting (PGMQBroker' { conn, defaultVt }) queue = loop+ where+ -- loop :: PGMQ.SerializableMessage a => IO (BrokerMessage PGMQBroker' a)+ loop = do+ -- NOTE readMessageWithPoll is not thread-safe, i.e. the+ -- blocking is outside of GHC (in PostgreSQL itself) and we+ -- can't reliably use it in a highly concurrent situation.+ + -- NOTE! This sets message visibility timeout so that other+ -- workers don't start this job at the same time!+ mMsg <- PGMQ.readMessage conn (renderQueue queue) defaultVt+ case mMsg of+ Nothing -> do+ -- wait a bit, then retry+ threadDelay (150 * 1000)+ loop+ Just msg -> do+ return $ PGMQBM msg++ popMessageWaiting q@(PGMQBroker' { conn }) queue = loop+ where+ -- loop :: PGMQ.SerializableMessage a => IO (BrokerMessage PGMQBroker' a)+ loop = do+ -- mMsg <- PGMQ.readMessageWithPoll conn queue 10 5 100+ mMsg <- PGMQ.popMessage conn (renderQueue queue)+ case mMsg of+ Nothing -> do+ -- wait a bit, then retry+ threadDelay (50 * 1000)+ popMessageWaiting q queue+ Just msg -> do+ -- TODO! we want to set message visibility timeout so that other workers don't start this job+ return $ PGMQBM msg++ setMessageTimeout (PGMQBroker' { conn }) (renderQueue -> queue) (PGMQMid msgId) (TimeoutS timeoutS) =+ PGMQ.setMessageVt conn queue msgId timeoutS++ sendMessage b queue message = do+ sendMessageDelayed b queue message (TimeoutS 0)++ sendMessageDelayed (PGMQBroker' { conn }) (renderQueue -> queue) (PGMQM message) (TimeoutS t) = do+ PGMQMid <$> PGMQ.safeSendMessage conn queue message t++ deleteMessage (PGMQBroker' { conn }) (renderQueue -> queue) (PGMQMid msgId) = do+ PGMQ.deleteMessage conn queue msgId++ archiveMessage (PGMQBroker' { conn }) (renderQueue -> queue) (PGMQMid msgId) = do+ PGMQ.archiveMessage conn queue msgId++ getQueueSize (PGMQBroker' { conn }) (renderQueue -> queue) = do+ -- NOTE: pgmq.metrics is NOT a proper way to deal with messages+ -- that have vt in the future+ -- (c.f. https://github.com/tembo-io/pgmq/issues/301)+ -- mMetrics <- PGMQ.getMetrics conn queue+ -- case mMetrics of+ -- Nothing -> return 0+ -- Just (PGMQ.Metrics { queueLength }) -> return queueLength+ PGMQ.queueAvailableLength conn queue++ getArchivedMessage (PGMQBroker' { conn }) (renderQueue -> queue) (PGMQMid msgId) = do+ mMsg <- PGMQ.readMessageFromArchive conn queue msgId+ pure $ PGMQBM <$> mMsg++ listPendingMessageIds (PGMQBroker' { conn }) (renderQueue -> queue) = do+ msgIds <- PGMQ.queueAvailableIds conn queue+ pure $ PGMQMid <$> msgIds++ getMessageById (PGMQBroker' { conn }) (renderQueue -> queue) (PGMQMid msgId) = do+ mMsg <- PGMQ.readMessageById conn queue msgId+ pure $ PGMQBM <$> mMsg++deriving anyclass instance NFData (MessageId PGMQBroker)++instance ToJSON (MessageId PGMQBroker) where+ toJSON (PGMQMid i) = toJSON i+instance FromJSON (MessageId PGMQBroker) where+ parseJSON = withScientific "PGMQMid" $ \n ->+ case floatingOrInteger n of+ Right i -> pure $ PGMQMid i+ Left (f :: Double) -> fail $ "Integer expected: " <> show f
+ tests/Test/Integration/PGMQ.hs view
@@ -0,0 +1,53 @@+module Test.Integration.PGMQ+ ( pgmqBrokerInitParams+ , pgmqWorkerBrokerInitParams )+where++import Async.Worker.Broker.PGMQ qualified as PGMQ+import Async.Worker.Broker.Types qualified as BT+import Async.Worker.Types (Job(..))+import Data.Maybe (fromMaybe)+import Database.PostgreSQL.Simple qualified as PSQL+import System.Environment (lookupEnv)+import Test.Integration.Broker qualified as TIB+import Test.Integration.Worker qualified as TIW++-- | Visibility timeout is a very important parameter for PGMQ. It is+-- mainly used when reading a job: it specifies for how many seconds+-- this job should be invisible for other workers. We need more tests+-- and setting this correctly, preferably in accordance with+-- 'Job.timeout'. Issue is that at the broker level we don't know+-- anything about 'Job'...+--+-- The lower the value, the more probable that some other worker will+-- pick up the same job at about the same time (before broker marks it+-- as invisible).+defaultPGMQVt :: Int+defaultPGMQVt = 1++-- | PSQL connect info that is fetched from env+getPSQLEnvConnectInfo :: IO PSQL.ConnectInfo+getPSQLEnvConnectInfo = do+ pgUser <- lookupEnv "POSTGRES_USER"+ pgDb <- lookupEnv "POSTGRES_DB"+ pgPass <- lookupEnv "POSTGRES_PASSWORD"+ pgHost <- lookupEnv "POSTGRES_HOST"+ -- https://hackage.haskell.org/package/postgresql-simple-0.7.0.0/docs/Database-PostgreSQL-Simple.html#t:ConnectInfo+ pure $ PSQL.defaultConnectInfo { PSQL.connectUser = fromMaybe "postgres" pgUser+ , PSQL.connectDatabase = fromMaybe "postgres" pgDb+ , PSQL.connectHost = fromMaybe "localhost" pgHost+ , PSQL.connectPassword = fromMaybe "postgres" pgPass }+++pgmqBrokerInitParams :: IO (BT.BrokerInitParams PGMQ.PGMQBroker TIB.Message)+pgmqBrokerInitParams = do+ conn <- getPSQLEnvConnectInfo+ return $ PGMQ.PGMQBrokerInitParams conn defaultPGMQVt+++++pgmqWorkerBrokerInitParams :: IO (BT.BrokerInitParams PGMQ.PGMQBroker (Job TIW.Message))+pgmqWorkerBrokerInitParams = do+ conn <- getPSQLEnvConnectInfo+ return $ PGMQ.PGMQBrokerInitParams conn defaultPGMQVt
+ tests/integration-tests.hs view
@@ -0,0 +1,25 @@+module Main where++import Test.Integration.Broker (brokerTests)+import Test.Integration.PGMQ (pgmqBrokerInitParams, pgmqWorkerBrokerInitParams)+import Test.Integration.Worker (workerTests, multiWorkerTests)+import Test.Tasty+import Test.Tasty.Hspec++++main :: IO ()+main = do+ pgmqBInitParams <- pgmqBrokerInitParams+ pgmqBrokerSpec <- testSpec "brokerTests" (brokerTests pgmqBInitParams)+ pgmqWBInitParams <- pgmqWorkerBrokerInitParams+ pgmqWorkerSpec <- testSpec "workerTests" (workerTests pgmqWBInitParams)+ pgmqMultiWorkerSpec <- testSpec "multiWorkerTests" (multiWorkerTests pgmqWBInitParams 5)++ defaultMain $ testGroup "PGMQ integration tests"+ [+ pgmqBrokerSpec+ , pgmqWorkerSpec+ , pgmqMultiWorkerSpec+ ]+