dbus-0.10.13: examples/export.hs

{-# LANGUAGE OverloadedStrings #-}

-- Copyright (C) 2009-2011 John Millikin <john@john-millikin.com>
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program.  If not, see <http://www.gnu.org/licenses/>.

module Main (main) where

import           Control.Concurrent (threadDelay)
import           Control.Monad
import           System.Exit

import           DBus.Client

onFoo :: String -> String -> IO (String, String)
onFoo x y = do
    putStrLn ("Foo " ++ show x ++ " " ++ show y)
    return (x, y)

onBar :: String -> String -> IO (String, String)
onBar x y = do
    putStrLn ("Bar " ++ show x ++ " " ++ show y)
    throwError "com.example.ErrorBar" "Bar failed" []

main :: IO ()
main = do
    -- Connect to the bus
    client <- connectSession

    -- Request a unique name on the bus.
    requestResult <- requestName client "com.example.exporting" []
    when (requestResult /= NamePrimaryOwner) $ do
        putStrLn "Another service owns the \"com.example.exporting\" bus name"
        exitFailure

    -- Export two example objects
    export client "/a"
        [ autoMethod "test.iface_1" "Foo" (onFoo "hello" "a")
        , autoMethod "test.iface_1" "Bar" (onBar "hello" "a")
        ]
    export client "/b"
        [ autoMethod "test.iface_1" "Foo" (onFoo "hello")
        , autoMethod "test.iface_1" "Bar" (onBar "hello")
        ]

    putStrLn "Exported objects /a and /b to bus name com.example.exporting"

    -- Wait forever for method calls
    forever (threadDelay 50000)