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README
yesod-job-queue

Background jobs library for Yesod.
- There are API and Web UI for managing the job.
- Queue backend is Redis.
- Multithreaded.
Web interface
Usage
Prepare the JobState to manage the running jobs
import Yesod.JobQueue
data App = App {
appConnPool :: ConnectionPool
, appDBConf :: SqliteConf
, appJobState :: JobState
}
-- e.g. In makeFoundation
main = do
jobState <- newJobState -- create JobState
let app = App pool dbConf jobState
Make the routes for API & Manager UI
mkYesod "App" [parseRoutes|
/ HomeR GET
/job JobQueueR JobQueue getJobQueue -- ^ JobQueue API and Manager
|]
Define the job. And, to the setting of JobQueue
-- Your job type
data MyJobType = AggregationUser
| PushNotification
| HelloJob String
deriving (Show, Read, Generic)
-- JobQueue settings
instance YesodJobQueue App where
type JobType App = MyJobType
getJobState = appJobState
threadNumber _ = 2
runDBJob action = do -- Required if you use the DB in the job
app <- ask
runSqlPool action $ appConnPool app
-- Your Job code
runJob _ AggregationUser = do
us <- runDBJob $ selectList ([] :: [Filter Person]) []
liftIO $ threadDelay $ 10 * 1000 * 1000
print us
putStrLn "complate job!"
runJob _ PushNotification = do
putStrLn "sent norification!"
runJob _ (HelloJob name) = do
putStrLn . pack $ "Hello " ++ name
Please see example
Configration queue backend (Redis)
The default is to connect to redis localhost:6379
.
And, you can change connect info by queueConnectInfo
Build package
stack build
build javascripts (required when app/* was editted)
cd app
npm install
npm run build-js
# need again `stack build`
developping app/*
You can edit app/app.js without re-build package
npm run watch-js ## watch app/*.js for changes, automatically build.
npm run bs ## serving app.bundle.js at `http://localhost:3001/dist/app.bundle.js` for test
in example/Main.hs
. to use test version of app.bundle.js.
jobManagerJSUrl _ = "http://localhost:3001/dist/app.bundle.js"
Run example
stack build --flag yesod-job-queue:example && stack exec yesod-job-queue-example
You can access Web UI: http://localhost:3000/job/manager