Engine.icl 11.7 KB
Newer Older
1
implementation module iTasks.Engine
2

3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
import Data.Func
import Data.Functor
import Data.Queue
import Internet.HTTP
import StdEnv
import System.CommandLine
import System.Directory
import System.File
import System.FilePath
import System.GetOpt
import System.OS
import Text
import iTasks.Internal.Distributed.Symbols
import iTasks.Internal.EngineTasks
import iTasks.Internal.IWorld
import iTasks.Internal.SDS
import iTasks.Internal.SDSService
import iTasks.Internal.TaskServer
import iTasks.Internal.TaskStore
import iTasks.Internal.Util
import iTasks.SDS.Sources.System
24
import iTasks.WF.Combinators.Common
25 26
import iTasks.WF.Definition
import iTasks.WF.Tasks.SDS
27
import iTasks.WF.Tasks.System
28

29
import qualified Data.Map as DM
30

31 32
from TCPIP import :: Timeout
from StdFunc import :: St, seqList
33

Mart Lubbers's avatar
Mart Lubbers committed
34 35
MAX_EVENTS 		        :== 5

36
derive class iTask EngineOptions
37

38 39
doTasks :: a !*World -> *World | Startable a
doTasks startable world = doTasksWithOptions defaultEngineCLIOptions startable world
40

41
doTasksWithOptions :: ([String] EngineOptions -> MaybeError [String] EngineOptions) a !*World -> *World | Startable a
42
doTasksWithOptions initFun startable world
43 44 45 46 47 48 49 50 51
	# (cli,world)                = getCommandLine world
	# (options,world)            = defaultEngineOptions world
	# mbOptions                  = initFun cli options
	| mbOptions =:(Error _)      = show (fromError mbOptions) world
	# options                    = fromOk mbOptions
	# iworld                     = createIWorld options world
	# (res,iworld)               = initJSCompilerState iworld
	| res =:(Error _)            = show ["Fatal error: " +++ fromError res] (destroyIWorld iworld)
	# (symbolsResult, iworld)    = initSymbolsShare options.distributed options.appName iworld
Haye Böhm's avatar
Haye Böhm committed
52
	| symbolsResult =: (Error _) = show ["Error reading symbols while required: " +++ fromError symbolsResult] (destroyIWorld iworld)
Mart Lubbers's avatar
Mart Lubbers committed
53
	# iworld                     = serve (startupTasks options) (tcpTasks options.serverPort options.keepaliveTime) (timeout options.timeout) iworld
54
	= destroyIWorld iworld
55
where
56
    webTasks = [t \\ WebTask t <- toStartable startable]
57
	startupTasks {distributed, sdsPort}
Mart Lubbers's avatar
cleanup  
Mart Lubbers committed
58
		//If distributed, start sds service task
59
		=  (if distributed [startTask (sdsServiceTask sdsPort)] [])
60 61 62
		++ [startTask flushWritesWhenIdle
		//If there no webtasks, stop when stable, otherwise cleanup old sessions
		   ,startTask if (webTasks =: []) stopOnStable removeOutdatedSessions
Mart Lubbers's avatar
cleanup  
Mart Lubbers committed
63
		//Start all startup tasks
64
		   :[t \\ StartupTask t <- toStartable startable]]
Mart Lubbers's avatar
cleanup  
Mart Lubbers committed
65

66
	startTask t = {StartupTask|attributes=defaultValue,task=TaskWrapper t}
Mart Lubbers's avatar
cleanup  
Mart Lubbers committed
67

Haye Böhm's avatar
Haye Böhm committed
68
	initSymbolsShare False _ iworld = (Ok (), iworld)
Haye Böhm's avatar
Haye Böhm committed
69
	initSymbolsShare True appName iworld = case storeSymbols (IF_WINDOWS (appName +++ ".exe") appName) iworld of
Haye Böhm's avatar
Haye Böhm committed
70
		(Error (e, s), iworld) = (Error s, iworld)
71
		(Ok noSymbols, iworld) = (Ok (),  {iworld & world = show ["Read number of symbols: " +++ toString noSymbols] iworld.world})
Haye Böhm's avatar
Haye Böhm committed
72

73 74 75 76 77
	//Only run a webserver if there are tasks that are started through the web
	tcpTasks serverPort keepaliveTime
		| webTasks =: [] = []
		| otherwise
			= [(serverPort,httpServer serverPort keepaliveTime (engineWebService webTasks) taskOutput)]
78

79
	// The iTasks engine consist of a set of HTTP Web services
80
	engineWebService :: [WebTask] -> [WebService (Map InstanceNo TaskOutput) (Map InstanceNo TaskOutput)]
81 82 83 84 85 86 87 88 89 90 91 92 93
	engineWebService webtasks =
		[taskUIService webtasks
		,documentService
		,staticResourceService [path \\ {WebTask|path} <- webtasks]
		]

	show :: ![String] !*World -> *World
	show lines world
		# (console,world)	= stdio world
		# console			= seqSt (\s c -> fwrites (s +++ OS_NEWLINE) c) lines console
		# (_,world)			= fclose console world
		= world

94
defaultEngineCLIOptions :: [String] EngineOptions -> MaybeError [String] EngineOptions
95 96 97 98 99 100 101 102 103 104
defaultEngineCLIOptions [argv0:argv] defaults
	# (settings, positionals, errs) = getOpt Permute opts argv
	| not (errs =: []) = Error errs
	| not (positionals =: []) = Error ["Positional arguments not allowed"]
	= case foldl (o) id settings (Just defaults) of
		Nothing = (Error [usageInfo ("Usage " +++ argv0 +++ "[OPTIONS]") opts])
		Just settings = Ok settings
where
	opts :: [OptDescr ((Maybe EngineOptions) -> Maybe EngineOptions)]
	opts =
105
		[ Option ['?'] ["help"] (NoArg (\_->Nothing))
106 107
			"Display this message"
		, Option ['p'] ["port"] (ReqArg (\p->fmap \o->{o & serverPort=toInt p}) "PORT")
108
			("Specify the HTTP port (default: " +++ toString defaults.serverPort +++ ")")
109 110 111 112
		, Option [] ["timeout"] (OptArg (\mp->fmap \o->{o & timeout=fmap toInt mp}) "MILLISECONDS")
			"Specify the timeout in ms (default: 500)\nIf not given, use an indefinite timeout."
		, Option [] ["keepalive"] (ReqArg (\p->fmap \o->{o & keepaliveTime={tv_sec=toInt p,tv_nsec=0}}) "SECONDS")
			"Specify the keepalive time in seconds (default: 300)"
113 114
		, Option [] ["maxevents"] (ReqArg (\p->fmap \o->{o & maxEvents=toInt p}) "NUM")
			"Specify the maximum number of events to process per loop (default: 5)"
115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132
		, Option [] ["sessiontime"] (ReqArg (\p->fmap \o->{o & sessionTime={tv_sec=toInt p,tv_nsec=0}}) "SECONDS")
			"Specify the expiry time for a session in seconds (default: 60)"
		, Option [] ["autolayout"] (NoArg (fmap \o->{o & autoLayout=True}))
			"Enable autolayouting (default)"
		, Option [] ["no-autolayout"] (NoArg (fmap \o->{o & autoLayout=False}))
			"Disable autolayouting"
		, Option [] ["persist-tasks"] (NoArg (fmap \o->{o & persistTasks=True}))
			"Enable the persistence of tasks"
		, Option [] ["no-persist-tasks"] (NoArg (fmap \o->{o & persistTasks=False}))
			"Disable the persistence of tasks (default)"
		, Option [] ["webdir"] (ReqArg (\p->fmap \o->{o & webDirPath=p}) "PATH")
			("Specify the folder containing static web content\ndefault: " +++ defaults.webDirPath)
		, Option [] ["storedir"] (ReqArg (\p->fmap \o->{o & storeDirPath=p}) "PATH")
			("Specify the folder containing the data stores\ndefault: " +++ defaults.storeDirPath)
		, Option [] ["tempdir"] (ReqArg (\p->fmap \o->{o & tempDirPath=p}) "PATH")
			("Specify the folder containing the temporary files\ndefault: " +++ defaults.tempDirPath)
		, Option [] ["sapldir"] (ReqArg (\p->fmap \o->{o & saplDirPath=p}) "PATH")
			("Specify the folder containing the sapl files\ndefault: " +++ defaults.saplDirPath)
133 134
		, Option [] ["distributed"] (NoArg (fmap \o->{o & distributed=True}))
			"Enable distributed mode (populate the symbols share)"
135 136
		, Option ['s'] ["sdsPort"] (ReqArg (\p->fmap \o->{o & sdsPort=toInt p}) "SDSPORT")
			("Specify the SDS port (default: " +++ toString defaults.sdsPort +++ ")")
137
		]
138

139 140
onStartup :: (Task a) -> StartableTask | iTask a
onStartup task = StartupTask {StartupTask|attributes = defaultValue, task = TaskWrapper task}
141

142 143 144 145 146 147 148 149
onRequest :: String (Task a) -> StartableTask | iTask a
onRequest path task = WebTask {WebTask|path = path, task = WebTaskWrapper (const task)}

onStartupWithAttributes :: (Task a) TaskAttributes -> StartableTask | iTask a
onStartupWithAttributes task attributes = StartupTask {StartupTask|attributes = attributes, task = TaskWrapper task}

onRequestFromRequest :: String (HTTPRequest -> Task a) -> StartableTask | iTask a
onRequestFromRequest path task = WebTask {WebTask|path = path, task = WebTaskWrapper task}
150 151

class Startable a
Bas Lijnse's avatar
Bas Lijnse committed
152
where
153 154 155
	toStartable :: !a -> [StartableTask]

instance Startable (Task a) | iTask a //Default as web task
156
where
157
	toStartable task =
158 159
		[onStartup viewWebServerInstructions
		,onRequest "/" task
160
		]
161

162
instance Startable (HTTPRequest -> Task a) | iTask a //As web task
163
where
164
	toStartable task =
165 166
		[onStartup viewWebServerInstructions
		,onRequestFromRequest "/" task
167
		]
168

169
instance Startable StartableTask
170
where
171
	toStartable task = [task]
172

173
instance Startable [StartableTask]
174
where
175
	toStartable list = list
176

177 178 179 180
instance Startable (a,b) | Startable a & Startable b
where
	toStartable (x,y) = toStartable x ++ toStartable y

181 182 183 184 185 186 187 188 189 190 191 192
viewWebServerInstructions :: Task String
viewWebServerInstructions
	=   get applicationOptions
	>>- \{EngineOptions|appName,serverPort} ->
			traceValue (join OS_NEWLINE
				["*** " +++ appName +++ " HTTP server ***"
				,""
				,"Running at http://localhost" +++
					if (serverPort == 80)
						"/"
						(":" +++ toString serverPort +++ "/")
				])
193

194 195
defaultEngineOptions :: !*World -> (!EngineOptions,!*World)
defaultEngineOptions world
196
	# (appPath,world)    = determineAppPath world
197 198 199
	# (appVersion,world) = determineAppVersion appPath world
	# appDir             = takeDirectory appPath
	# appName            = (dropExtension o dropDirectory) appPath
200
	# options =
201 202 203 204 205
		{ appName        = appName
		, appPath        = appPath
		, appVersion     = appVersion
		, serverPort     = IF_POSIX_OR_WINDOWS 8080 80
		, serverUrl      = "http://localhost/"
206
		, allowedHosts   = ["127.0.0.1"]
207 208 209 210 211 212 213
		, keepaliveTime  = {tv_sec=300,tv_nsec=0} // 5 minutes
		, sessionTime    = {tv_sec=60,tv_nsec=0}  // 1 minute, (the client pings every 10 seconds by default)
		, persistTasks   = False
		, autoLayout     = True
		, distributed    = False
		, maxEvents      = 5
		, sdsPort        = 9090
Mart Lubbers's avatar
Mart Lubbers committed
214
		, timeout        = Nothing//Just 500
215 216 217 218
		, webDirPath     = appDir </> appName +++ "-www"
		, storeDirPath   = appDir </> appName +++ "-data" </> "stores"
		, tempDirPath    = appDir </> appName +++ "-data" </> "tmp"
		, saplDirPath    = appDir </> appName +++ "-sapl"
219 220 221
		}
	= (options,world)

ecrombag's avatar
ecrombag committed
222
// Determines the server executables path
223
determineAppPath :: !*World -> (!FilePath, !*World)
ecrombag's avatar
ecrombag committed
224
determineAppPath world
225
	# ([arg:_],world) = getCommandLine world
226
	| dropDirectory arg <> "ConsoleClient.exe"	= toCanonicalPath arg world
227 228 229
	//Using dynamic linker:
	# (res, world)				= getCurrentDirectory world
	| isError res				= abort "Cannot get current directory."
230
	# currentDirectory			= fromOk res
231 232
	# (res, world)				= readDirectory currentDirectory world
	| isError res				= abort "Cannot read current directory."
233
	# batchfiles				= [f \\ f <- fromOk res | takeExtension f == "bat" ]
234 235 236 237 238
	| isEmpty batchfiles		= abort "No dynamic linker batch file found."
	# (infos, world)			= seqList (map getFileInfo batchfiles) world
	| any isError infos	 		= abort "Cannot get file information."
	= (currentDirectory </> (fst o hd o sortBy cmpFileTime) (zip2 batchfiles infos), world)
	where
239
		cmpFileTime (_,Ok {FileInfo | lastModifiedTime = x})
240
					(_,Ok {FileInfo | lastModifiedTime = y}) = timeGm x > timeGm y
241

242
//By default, we use the modification time of the application executable as version id
243
determineAppVersion :: !FilePath!*World -> (!String,!*World)
244 245
determineAppVersion appPath world
	# (res,world)       = getFileInfo appPath world
246
	| res =: (Error _)  = ("unknown",world)
247 248 249
	# tm				= (fromOk res).lastModifiedTime
	# version           = strfTime "%Y%m%d-%H%M%S" tm
	= (version,world)
250 251 252 253 254 255 256 257 258 259 260 261

timeout :: !(Maybe Timeout) !*IWorld -> (!Maybe Timeout,!*IWorld)
timeout mt iworld = case read taskEvents EmptyContext iworld of
	//No events
	(Ok (ReadingDone (Queue [] [])),iworld=:{sdsNotifyRequests,world})
		# (ts, world) = nsTime world
		= ( minListBy lesser [mt:flatten (map (getTimeoutFromClock ts) ('DM'.elems sdsNotifyRequests))]
		  , {iworld & world = world})
	(Ok (ReadingDone (Queue _ _)), iworld)               = (Just 0,iworld)   //There are still events, don't wait
	(Error _,iworld)            = (Just 500,iworld) //Keep retrying, but not too fast
where
	lesser (Just x) (Just y) = x < y
262 263
	lesser (Just _) Nothing  = True
	lesser _        _        = False
264 265 266 267 268 269 270 271 272 273 274 275 276

	getTimeoutFromClock :: Timespec (Map SDSNotifyRequest Timespec) -> [Maybe Timeout]
	getTimeoutFromClock now requests = map getTimeoutFromClock` ('DM'.toList requests)
	where
		getTimeoutFromClock` :: (!SDSNotifyRequest, !Timespec) -> Maybe Timeout
		getTimeoutFromClock` (snr=:{cmpParam=(ts :: ClockParameter Timespec)}, reqTimespec)
			| startsWith "$IWorld:timespec$" snr.reqSDSId && ts.interval <> zero
				# fire = iworldTimespecNextFire now reqTimespec ts
				= Just (max 0 (toMs fire - toMs now))
			= mt
		getTimeoutFromClock` _ = mt

	toMs x = x.tv_sec * 1000 + x.tv_nsec / 1000000