add event statistics, fix CronTask

- add for EventEnv a timeStartup field
- cha EventListener and EventListenerManager
  - add for EventListener a method executeFilter used to manager if an event should be run. This replaced the condition statement inside the EventListenerManager
  - add for EventListener a method atEventPost, this will run at current event listener is on complete
- add for MornyConfig a reportZone field
  - can be set by `--report-zone`
  - used for controlling Morny Report daemon uses the zoned time to send report. default is system default time zone.
- add for MornyReport new EventStatistics and DailyReportTask
- add for MornyInformation command new subcommand `event` to manually show MornyReport.EventStatistics info.
- add WatchDog and MornyCoeur.watchDog, used for checking if the machine is in sleep mode and notify the MornyCoeur.tasks to avoid timing problem
- fix CronTask frequency got initialize problem
- add slf4j-nop for project

build.gradle

@@ -83,20 +83,25 @@ dependencies {
 	
 	implementation group: 'cc.sukazyo', name: 'messiva', version: lib_messiva_v
 	implementation group: 'cc.sukazyo', name: 'resource-tools', version: lib_resourcetools_v
-	testImplementation group: 'cc.sukazyo', name: 'resource-tools', version: lib_resourcetools_v
 	
 	implementation group: 'com.github.pengrad', name: 'java-telegram-bot-api', version: lib_javatelegramapi_v
 	implementation group: 'com.softwaremill.sttp.client3', name: scala('core'), version: lib_sttp_v
 	implementation group: 'com.softwaremill.sttp.client3', name: scala('okhttp-backend'), version: lib_sttp_v
-	implementation group: 'com.squareup.okhttp3', name: 'okhttp', version: lib_okhttp_v
+	runtimeOnly group: 'com.squareup.okhttp3', name: 'okhttp', version: lib_okhttp_v
 	implementation group: 'com.google.code.gson', name: 'gson', version: lib_gson_v
 	implementation group: 'com.cronutils', name: 'cron-utils', version: lib_cron_utils_v
 	
+	// used for disable slf4j
+	// due to the slf4j api have been used in the following libraries:
+	//  - cron-utils
+	runtimeOnly group: 'org.slf4j', name: 'slf4j-nop', version: lib_slf4j_v
+	testRuntimeOnly group: 'org.slf4j', name: 'slf4j-nop', version: lib_slf4j_v
+	
+	testImplementation group: 'cc.sukazyo', name: 'resource-tools', version: lib_resourcetools_v
 	testImplementation group: 'org.scalatest', name: scala('scalatest'), version: lib_scalatest_v
 	testImplementation group: 'org.scalatest', name: scala('scalatest-freespec'), version: lib_scalatest_v
 	testRuntimeOnly group: 'org.scala-lang.modules', name: scala('scala-xml'), version: lib_scalamodule_xml_v
-	
-	// for generating HTML report // required by gradle-scalatest plugin
+	// for generating HTML report: required by gradle-scalatest plugin
 	testRuntimeOnly group: 'com.vladsch.flexmark', name: 'flexmark-all', version: '0.64.6'
 	
 }

gradle.properties

@@ -5,7 +5,7 @@ MORNY_ARCHIVE_NAME = morny-coeur
 MORNY_CODE_STORE = https://github.com/Eyre-S/Coeur-Morny-Cono
 MORNY_COMMIT_PATH = https://github.com/Eyre-S/Coeur-Morny-Cono/commit/%s
 
-VERSION = 1.3.0-dev2
+VERSION = 1.3.0-dev3
 
 USE_DELTA = false
 VERSION_DELTA =
@@ -19,6 +19,7 @@ lib_scalamodule_xml_v = 2.2.0
 
 lib_messiva_v = 0.2.0
 lib_resourcetools_v = 0.2.2
+lib_slf4j_v = 2.0.9
 
 lib_javatelegramapi_v = 6.2.0
 

src/main/scala/cc/sukazyo/cono/morny/MornyCoeur.scala

@@ -9,9 +9,11 @@ import cc.sukazyo.cono.morny.bot.event.{MornyEventListeners, MornyOnInlineQuery,
 import cc.sukazyo.cono.morny.bot.query.MornyQueries
 import cc.sukazyo.cono.morny.util.schedule.Scheduler
 import cc.sukazyo.cono.morny.util.EpochDateTime.EpochMillis
+import cc.sukazyo.cono.morny.util.time.WatchDog
 import com.pengrad.telegrambot.TelegramBot
 import com.pengrad.telegrambot.request.GetMe
 
+import scala.annotation.unused
 import scala.util.boundary
 import scala.util.boundary.break
 
@@ -64,10 +66,10 @@ class MornyCoeur (using val config: MornyConfig) {
 	/** [[account]]'s telegram user id */
 	val userid: Long = __loginResult.userid
 	
-	/** current Morny's [[MornyTrusted]] instance */
-	val trusted: MornyTrusted = MornyTrusted()
 	/** Morny's task [[Scheduler]] */
 	val tasks: Scheduler = Scheduler()
+	/** current Morny's [[MornyTrusted]] instance */
+	val trusted: MornyTrusted = MornyTrusted()
 	
 	val daemons: MornyDaemons = MornyDaemons()
 	//noinspection ScalaWeakerAccess
@@ -80,6 +82,15 @@ class MornyCoeur (using val config: MornyConfig) {
 	eventManager register MornyOnInlineQuery(using queries)
 	//noinspection ScalaUnusedSymbol
 	val events: MornyEventListeners = MornyEventListeners(using eventManager)
+	eventManager register daemons.reporter.EventStatistics.EventInfoCatcher
+	@unused
+	val watchDog: WatchDog = WatchDog("watch-dog", 1000, 1500, { (consumed, _) =>
+		import cc.sukazyo.cono.morny.util.CommonFormat.formatDuration as f
+		logger warn
+			s"""Can't keep up! is the server overloaded or host machine fall asleep?
+			   |  current tick takes ${f(consumed)} to complete.""".stripMargin
+		tasks.notifyIt()
+	})
 	
 	///>>> BLOCK START instance configure & startup stage 2
 	

src/main/scala/cc/sukazyo/cono/morny/MornyConfig.java

@@ -6,6 +6,7 @@ import java.lang.annotation.*;
 import java.time.ZoneOffset;
 import java.util.HashSet;
 import java.util.Set;
+import java.util.TimeZone;
 
 public class MornyConfig {
 	
@@ -109,6 +110,18 @@ public class MornyConfig {
 	 */
 	public final long reportToChat;
 	
+	/**
+	 * 控制 Morny Coeur 系统的报告的基准时间.
+	 * <p> 
+	 * 仅会用于 {@link cc.sukazyo.cono.morny.daemon.MornyReport} 内的时间敏感的报告，
+	 * 不会用于 {@code /info} 命令等位置。
+	 * <p>
+	 * 默认使用 {@link TimeZone#getDefault()}.
+	 * 
+	 * @since 1.3.0
+	 */
+	@Nonnull public final TimeZone reportZone;
+	
 	/* ======================================= *
 	 *  function: dinner query tool            *
 	 * ======================================= */
@@ -144,6 +157,7 @@ public class MornyConfig {
 		this.dinnerTrustedReaders = prototype.dinnerTrustedReaders;
 		this.dinnerChatId = prototype.dinnerChatId;
 		this.reportToChat = prototype.reportToChat;
+		this.reportZone = prototype.reportZone;
 		this.medicationNotifyToChat = prototype.medicationNotifyToChat;
 		this.medicationTimerUseTimezone = prototype.medicationTimerUseTimezone;
 		prototype.medicationNotifyAt.forEach(i -> { if (i < 0 || i > 23) throw new CheckFailure.UnavailableTimeInMedicationNotifyAt(); });
@@ -173,6 +187,7 @@ public class MornyConfig {
 		@Nonnull public final Set<Long> dinnerTrustedReaders = new HashSet<>();
 		public long dinnerChatId = -1L;
 		public long reportToChat = -1L;
+		@Nonnull public TimeZone reportZone = TimeZone.getDefault();
 		public long medicationNotifyToChat = -1L;
 		@Nonnull public ZoneOffset medicationTimerUseTimezone = ZoneOffset.UTC;
 		@Nonnull public final Set<Integer> medicationNotifyAt = new HashSet<>();

src/main/scala/cc/sukazyo/cono/morny/ServerMain.scala

@@ -51,6 +51,7 @@ object ServerMain {
 				case "--master" | "-mm" => i+=1 ; config.trustedMaster = args(i)toLong
 				case "--trusted-chat" | "-trs" => i+=1 ; config.trustedChat = args(i)toLong
 				case "--report-to" => i+=1; config.reportToChat = args(i)toLong
+				case "--report-zone" => i+=1; config.reportZone = TimeZone.getTimeZone(args(i))
 				
 				case "--trusted-reader-dinner" | "-trsd" => i+=1 ; config.dinnerTrustedReaders add (args(i)toLong)
 				case "--dinner-chat" | "-chd" => i+=1 ; config.dinnerChatId = args(i)toLong

src/main/scala/cc/sukazyo/cono/morny/bot/api/EventEnv.scala

@@ -1,5 +1,6 @@
 package cc.sukazyo.cono.morny.bot.api
 
+import cc.sukazyo.cono.morny.util.EpochDateTime.EpochMillis
 import com.pengrad.telegrambot.model.Update
 
 import scala.collection.mutable
@@ -12,6 +13,7 @@ class EventEnv (
 	
 	private var _isOk: Int = 0
 	private val variables: mutable.HashMap[Class[?], Any] = mutable.HashMap.empty
+	val timeStartup: EpochMillis = System.currentTimeMillis
 	
 	def isEventOk: Boolean = _isOk > 0
 	

src/main/scala/cc/sukazyo/cono/morny/bot/api/EventListener.scala

@@ -2,6 +2,25 @@ package cc.sukazyo.cono.morny.bot.api
 
 trait EventListener () {
 	
+	/** Determine if this event listener should be processed.
+	  *
+	  * Default implementation is it only be [[true]] when the event
+	  * is not ok yet (when [[EventEnv.isEventOk]] is false).
+	  *
+	  * Notice that: You should not override this method to filter some
+	  * affair level conditions (such as if this update contains a text
+	  * message), you should write them to the listener function! This
+	  * method is just for event low-level controls.
+	  *
+	  * @param env The [[EventEnv event variable]].
+	  * @return [[true]] if this event listener should run; [[false]]
+	  *         if it should not run.
+	  */
+	def executeFilter (using env: EventEnv): Boolean =
+		if env.isEventOk then false else true
+	
+	def atEventPost (using EventEnv): Unit = {}
+	
 	def onMessage (using EventEnv): Unit = {}
 	def onEditedMessage (using EventEnv): Unit = {}
 	def onChannelPost (using EventEnv): Unit = {}

src/main/scala/cc/sukazyo/cono/morny/bot/api/EventListenerManager.scala

@@ -32,7 +32,9 @@ class EventListenerManager (using coeur: MornyCoeur) extends UpdatesListener {
 		override def run (): Unit = {
 			given env: EventEnv = EventEnv(update)
 			boundary { for (i <- listeners) {
-				try {
+				
+				if (i.executeFilter) try {
+					
 					updateThreadName("message")
 					if update.message ne null then i.onMessage
 					updateThreadName("edited-message")
@@ -61,6 +63,10 @@ class EventListenerManager (using coeur: MornyCoeur) extends UpdatesListener {
 					if update.chatMember ne null then i.onChatMemberUpdated
 					updateThreadName("chat-join-request")
 					if update.chatJoinRequest ne null then i.onChatJoinRequest
+					
+					updateThreadName("#post")
+					i.atEventPost
+					
 				} catch case e => {
 					val errorMessage = StringBuilder()
 					errorMessage ++= "Event throws unexpected exception:\n"
@@ -75,7 +81,7 @@ class EventListenerManager (using coeur: MornyCoeur) extends UpdatesListener {
 					logger error errorMessage.toString
 					coeur.daemons.reporter.exception(e, "on event running")
 				}
-				if env.isEventOk then boundary.break()
+				
 			}}
 		}
 		

src/main/scala/cc/sukazyo/cono/morny/bot/command/MornyInformation.scala

@@ -23,11 +23,12 @@ class MornyInformation (using coeur: MornyCoeur) extends ITelegramCommand {
 		val VERSION = "version"
 		val VERSION_2 = "v"
 		val TASKS = "tasks"
+		val EVENTS = "event"
 	}
 	
 	override val name: String = "info"
 	override val aliases: Array[ICommandAlias]|Null = null
-	override val paramRule: String = "[(version|runtime|stickers[.IDs]|tasks)]"
+	override val paramRule: String = "[(version|runtime|stickers[.IDs]|tasks|event)]"
 	override val description: String = "输出当前 Morny 的各种信息"
 	
 	override def execute (using command: InputCommand, event: Update): Unit = {
@@ -44,6 +45,7 @@ class MornyInformation (using coeur: MornyCoeur) extends ITelegramCommand {
 			case Subs.RUNTIME => echoRuntime
 			case Subs.VERSION | Subs.VERSION_2 => echoVersion
 			case Subs.TASKS => echoTasksStatus
+			case Subs.EVENTS => echoEventStatistics
 			case _ => echo404
 		}
 		
@@ -159,6 +161,16 @@ class MornyInformation (using coeur: MornyCoeur) extends ITelegramCommand {
 		).parseMode(ParseMode.HTML).replyToMessageId(update.message.messageId)
 	}
 	
+	private def echoEventStatistics (using update: Update): Unit = {
+		coeur.account exec SendMessage(
+			update.message.chat.id,
+			// language=html
+			s"""<b>Event Statistics :</b>
+			   |in today
+			   |${coeur.daemons.reporter.EventStatistics.eventStatisticsHTML}""".stripMargin
+		).parseMode(ParseMode.HTML).replyToMessageId(update.message.messageId)
+	}
+	
 	private def echo404 (using event: Update): Unit =
 		coeur.account exec new SendSticker(
 			event.message.chat.id,

src/main/scala/cc/sukazyo/cono/morny/daemon/MornyDaemons.scala

@@ -13,8 +13,8 @@ class MornyDaemons (using val coeur: MornyCoeur) {
 		
 		logger notice "ALL Morny Daemons starting..."
 		
-		//		TrackerDataManager.init();
 		medicationTimer.start()
+		reporter.start()
 		
 		logger notice "Morny Daemons started."
 		
@@ -24,9 +24,8 @@ class MornyDaemons (using val coeur: MornyCoeur) {
 		
 		logger notice "stopping All Morny Daemons..."
 		
-		//		TrackerDataManager.DAEMON.interrupt();
 		medicationTimer.stop()
-		//		TrackerDataManager.trackingLock.lock();
+		reporter.stop()
 		
 		logger notice "stopped ALL Morny Daemons."
 	}

src/main/scala/cc/sukazyo/cono/morny/daemon/MornyReport.scala

@@ -2,17 +2,26 @@ package cc.sukazyo.cono.morny.daemon
 
 import cc.sukazyo.cono.morny.{MornyCoeur, MornyConfig}
 import cc.sukazyo.cono.morny.Log.{exceptionLog, logger}
+import cc.sukazyo.cono.morny.bot.api.{EventEnv, EventListener}
 import cc.sukazyo.cono.morny.data.MornyInformation.getVersionAllFullTagHTML
+import cc.sukazyo.cono.morny.util.statistics.NumericStatistics
 import cc.sukazyo.cono.morny.util.tgapi.event.EventRuntimeException
 import cc.sukazyo.cono.morny.util.tgapi.formatting.TelegramFormatter.*
 import cc.sukazyo.cono.morny.util.tgapi.formatting.TelegramParseEscape.escapeHtml as h
 import cc.sukazyo.cono.morny.util.tgapi.TelegramExtensions.Bot.exec
+import cc.sukazyo.cono.morny.util.EpochDateTime.DurationMillis
+import cc.sukazyo.cono.morny.util.schedule.CronTask
+import com.cronutils.builder.CronBuilder
+import com.cronutils.model.Cron
+import com.cronutils.model.definition.CronDefinitionBuilder
 import com.google.gson.GsonBuilder
 import com.pengrad.telegrambot.model.request.ParseMode
 import com.pengrad.telegrambot.model.User
 import com.pengrad.telegrambot.request.{BaseRequest, SendMessage}
 import com.pengrad.telegrambot.response.BaseResponse
 
+import java.time.ZoneId
+
 class MornyReport (using coeur: MornyCoeur) {
 	
 	private val enabled = coeur.config.reportToChat != -1
@@ -67,10 +76,12 @@ class MornyReport (using coeur: MornyCoeur) {
 			// language=html
 			s"""<b>▌Morny Logged in</b>
 			   |-v $getVersionAllFullTagHTML
-			   |as user @${coeur.username}
+			   |Logged into user: @${coeur.username}
 			   |
 			   |as config fields:
-			   |${sectionConfigFields(coeur.config)}"""
+			   |${sectionConfigFields(coeur.config)}
+			   |
+			   |Report Daemon will use TimeZone <code>${coeur.config.reportZone.getDisplayName}</code> for following report."""
 			.stripMargin
 		).parseMode(ParseMode HTML))
 	}
@@ -120,4 +131,91 @@ class MornyReport (using coeur: MornyCoeur) {
 		).parseMode(ParseMode HTML))
 	}
 	
+	object EventStatistics {
+		
+		private var eventTotal = 0
+		private val runningTime: NumericStatistics[DurationMillis] = NumericStatistics()
+		
+		def reset (): Unit = {
+			eventTotal = 0; runningTime.reset()
+		}
+		
+		private def runningTimeStatisticsHTML: String =
+			runningTime.value match
+				// language=html
+				case None => "<i><u>&lt;no-statistics&gt;</u></i>"
+				case Some(value) =>
+					import cc.sukazyo.cono.morny.util.CommonFormat.formatDuration as f
+					s""" - <i>average</i>: <code>${f(value.total / value.count)}</code>
+					   | - <i>max time</i>: <code>${f(value.max)}</code>
+					   | - <i>min time</i>: <code>${f(value.min)}</code>
+					   | - <i>total</i>: <code>${f(value.total)}</code>""".stripMargin
+		
+		def eventStatisticsHTML: String =
+			import cc.sukazyo.cono.morny.util.UseMath.percentageOf as p
+			val processed = runningTime.count
+			val ignored = eventTotal - processed
+			// language=html
+			s""" - <i>total event received</i>: <code>$eventTotal</code>
+			   | - <i>event processed</i>: (<code>${eventTotal p processed}%</code>) <code>$processed</code>
+			   | - <i>event ignored</i>: (<code>${eventTotal p ignored}%</code>) <code>$ignored</code>
+			   | - <i>processed time usage</i>:
+			   |${runningTimeStatisticsHTML.indent(3)}""".stripMargin
+		
+		object EventInfoCatcher extends EventListener {
+			override def executeFilter (using EventEnv): Boolean = true
+			//noinspection ScalaWeakerAccess
+			case class EventTimeUsed (it: DurationMillis)
+			override def atEventPost (using event: EventEnv): Unit = {
+				eventTotal += 1
+				if event.isEventOk then {
+					val timeUsed = EventTimeUsed(System.currentTimeMillis - event.timeStartup)
+					event provide timeUsed
+					logger debug s"event consumed ${timeUsed.it}ms"
+					runningTime ++ timeUsed.it
+				}
+			}
+		}
+		
+	}
+	
+	private object DailyReportTask extends CronTask {
+		
+		import com.cronutils.model.field.expression.FieldExpressionFactory.*
+		
+		override val name: String = "reporter#event"
+		override val cron: Cron = CronBuilder.cron(
+			CronDefinitionBuilder.defineCron
+				.withHours.and
+				.instance
+		).withHour(on(0)).instance
+		override val zone: ZoneId = coeur.config.reportZone.toZoneId
+		
+		//noinspection TypeAnnotation
+		override def main = {
+			
+			executeReport(SendMessage(
+				coeur.config.reportToChat,
+				// language=html
+				s"""▌Morny Daily Report
+				   |
+				   |<b>Event Statistics :</b>
+				   |${EventStatistics.eventStatisticsHTML}""".stripMargin
+			).parseMode(ParseMode.HTML))
+			
+			// daily reset
+			EventStatistics.reset()
+			
+		}
+		
+	}
+	
+	def start (): Unit = {
+		coeur.tasks ++ DailyReportTask
+	}
+	
+	def stop (): Unit = {
+		coeur.tasks % DailyReportTask
+	}
+	
 }

src/main/scala/cc/sukazyo/cono/morny/util/UseMath.scala

@@ -16,4 +16,9 @@ object UseMath {
 		def ** (other: Int): Double = Math.pow(self, other)
 	}
 	
+	extension (base: Int) {
+		def percentageOf (another: Int): Int =
+			Math.round((another.toDouble/base)*100).toInt
+	}
+	
 }

src/main/scala/cc/sukazyo/cono/morny/util/schedule/CronTask.scala

@@ -9,7 +9,7 @@ import scala.jdk.OptionConverters.*
 
 trait CronTask extends RoutineTask {
 	
-	private transparent inline def cronCalc = ExecutionTime.forCron(cron)
+	private lazy val cronCalc = ExecutionTime.forCron(cron)
 	
 	def cron: Cron
 	

src/main/scala/cc/sukazyo/cono/morny/util/schedule/RoutineTask.scala

@@ -13,14 +13,20 @@ import cc.sukazyo.cono.morny.util.EpochDateTime.EpochMillis
   */
 trait RoutineTask extends Task {
 	
-	private[schedule] var currentScheduledTimeMillis: EpochMillis = firstRoutineTimeMillis
+	private[schedule] var currentScheduledTimeMillis: Option[EpochMillis] = None
 	
 	/** Next running time of this task.
 	  *
-	  * Should be auto generated from [[firstRoutineTimeMillis]] and
-	  * [[nextRoutineTimeMillis]].
+	  * Should be auto generated from [[firstRoutineTimeMillis]] when this method
+	  * is called at first time, and then from [[nextRoutineTimeMillis]] for following
+	  * routines controlled by [[Scheduler]].
 	  */
-	override def scheduledTimeMillis: EpochMillis = currentScheduledTimeMillis
+	override def scheduledTimeMillis: EpochMillis =
+		currentScheduledTimeMillis match
+			case Some(time) => time
+			case None =>
+				currentScheduledTimeMillis = Some(firstRoutineTimeMillis)
+				currentScheduledTimeMillis.get
 	
 	/** The task scheduled time at initial.
 	  *

src/main/scala/cc/sukazyo/cono/morny/util/schedule/Scheduler.scala

@@ -63,8 +63,7 @@ class Scheduler {
 	private val taskList: mutable.TreeSet[Task] = mutable.TreeSet.empty
 	private var exitAtNextRoutine = false
 	private var waitForDone = false
-	private var currentRunning: Task|Null = _
-	private var currentRunning_isScheduledCancel = false
+//	private var currentRunning: Task|Null = _
 	private var runtimeStatus = State.INIT
 	private val runtime: Thread = new Thread {
 		
@@ -76,20 +75,19 @@ class Scheduler {
 						if taskList.isEmpty then true
 						else false
 				else false
-			while (!willExit) {
+			taskList.synchronized { while (!willExit) {
 				
 				runtimeStatus = State.PREPARE_RUN
 				
-				val nextMove: Task|EpochMillis|"None" = taskList.synchronized {
+				val nextMove: Task|EpochMillis|"None" =
 					taskList.headOption match
 						case Some(_readyToRun) if System.currentTimeMillis >= _readyToRun.scheduledTimeMillis =>
 							taskList -= _readyToRun
-							currentRunning = _readyToRun
+//							currentRunning = _readyToRun
 							_readyToRun
 						case Some(_notReady) =>
 							_notReady.scheduledTimeMillis - System.currentTimeMillis
 						case None => "None"
-				}
 				
 				nextMove match
 					case readyToRun: Task =>
@@ -104,31 +102,33 @@ class Scheduler {
 						runtimeStatus = State.RUNNING_POST
 						this setName s"${readyToRun.name}#post"
 						
-						if currentRunning_isScheduledCancel then {}
+						// this if is used for check if post effect need to be
+						//  run. It is useless since the wait/notify changes.
+						if false then {}
 						else {
-							currentRunning match
+							readyToRun match
 								case routine: RoutineTask =>
-									routine.nextRoutineTimeMillis(routine.currentScheduledTimeMillis) match
+									routine.nextRoutineTimeMillis(routine.currentScheduledTimeMillis.get) match
 										case next: EpochMillis =>
-											routine.currentScheduledTimeMillis = next
-											if (!currentRunning_isScheduledCancel) schedule(routine)
+											routine.currentScheduledTimeMillis = Some(next)
+											schedule(routine)
 										case _ =>
 								case _ =>
 						}
 						
-						currentRunning = null
+//						currentRunning = null
 						this setName runnerName
 						
 					case needToWaitMillis: EpochMillis =>
 						runtimeStatus = State.WAITING
-						try Thread.sleep(needToWaitMillis)
-						catch case _: InterruptedException => {}
+						try taskList.wait(needToWaitMillis)
+						catch case _: (InterruptedException|IllegalArgumentException) => {}
 					case _: "None" =>
 						runtimeStatus = State.WAITING_EMPTY
-						try Thread.sleep(Long.MaxValue)
+						try taskList.wait()
 						catch case _: InterruptedException => {}
 				
-			}
+			}}
 			runtimeStatus = State.END
 		}
 		
@@ -154,9 +154,9 @@ class Scheduler {
 	  * @return [[true]] if the task is added.
 	  */
 	def schedule (task: Task): Boolean =
-		try taskList.synchronized:
-			taskList add task
-		finally runtime.interrupt()
+		taskList.synchronized:
+			try taskList add task
+			finally taskList.notifyAll()
 	
 	/** Remove the task from scheduler task queue.
 	  *
@@ -172,23 +172,16 @@ class Scheduler {
 		this
 	/** Remove the task from scheduler task queue.
 	  *
-	  * If the removal task is running, the current run will be done, but will
-	  * not do the post effect of the task (like schedule the next routine
-	  * of [[RoutineTask]]).
+	  * If the removal task is running, the method will wait for the current run
+	  * complete (and current run post effect complete), then do remove.
 	  *
 	  * @return [[true]] if the task is in task queue or is running, and have been
 	  *         succeed removed from task queue.
 	  */
 	def cancel (task: Task): Boolean =
-		try {
-			val succeed = taskList.synchronized { taskList remove task }
-			if succeed then succeed
-			else if task == currentRunning then
-				currentRunning_isScheduledCancel = true
-				true
-			else false
-		}
-		finally runtime.interrupt()
+		taskList synchronized:
+			try taskList remove task
+			finally taskList.notifyAll()
 	
 	/** Count of tasks in the task queue.
 	  *
@@ -205,6 +198,19 @@ class Scheduler {
 	def runnerState: Thread.State =
 		runtime.getState
 	
+	/** Manually update the task scheduler.
+	  * 
+	  * If the inner state of the scheduler somehow changed and cannot automatically
+	  * update schedule states to schedule the new state, you can call this method
+	  * to manually let the task scheduler reschedule it.
+	  * 
+	  * You can also use it with some tick-guard like [[cc.sukazyo.cono.morny.util.time.WatchDog]]
+	  * to make the scheduler avoid fails when machine fall asleep or some else conditions.
+	  */
+	def notifyIt(): Unit =
+		taskList synchronized:
+			taskList.notifyAll()
+	
 	/** Stop the scheduler's runner, no matter how much task is not run yet.
 	  * 
 	  * After call this, it will immediately give a signal to the runner for
@@ -217,8 +223,9 @@ class Scheduler {
 	  * runner is stopped. If you want a sync version, see [[waitForStop]].
 	  */
 	def stop (): Unit =
-		exitAtNextRoutine = true
-		runtime.interrupt()
+		taskList synchronized:
+			exitAtNextRoutine = true
+			taskList.notifyAll()
 	
 	/** Stop the scheduler's runner, no matter how much task is not run yet,
 	  * and wait for the runner stopped.
@@ -251,8 +258,9 @@ class Scheduler {
 	  */
 	//noinspection ScalaWeakerAccess
 	def tagStopAtAllDone (): Unit =
-		waitForDone = true
-		runtime.interrupt()
+		taskList synchronized:
+			waitForDone = true
+			taskList.notifyAll()
 	
 	/** Tag this scheduler runner stop when all of the scheduler's task in task
 	  * queue have been stopped, and wait for the runner stopped.
@@ -264,6 +272,7 @@ class Scheduler {
 	  *                              thread. The interrupted status of the current
 	  *                              thread is cleared when this exception is thrown.
 	  */
+	@throws[InterruptedException]
 	def waitForStopAtAllDone(): Unit =
 		tagStopAtAllDone()
 		runtime.join()

src/main/scala/cc/sukazyo/cono/morny/util/statistics/NumericStatistics.scala

@@ -0,0 +1,101 @@
+package cc.sukazyo.cono.morny.util.statistics
+
+import scala.annotation.targetName
+
+/** Statistics for numbers.
+  *
+  * Gives a easy way to get amount of numbers min/max/sum value.
+  *
+  * Use [[++]] to collect a value to statistics, use [[value]] to
+  * get the statistic results.
+  *
+  * @param role The [[Numeric]] implementation of the given number type,
+  *             required for numeric calculation.
+  * @tparam T The exactly number type
+  */
+class NumericStatistics [T] (using role: Numeric[T]) {
+	
+	/** Statistic state values.
+	  *
+	  * This class instance should only be used in the statistics manager.
+	  * You need to converted it to [[State.Immutable]] version when expose
+	  * it (use its [[readonly]] method).
+	  *
+	  * @param total The sum of all data collected.
+	  * @param min The minimal value in the collected data.
+	  * @param max The maximize value in the collected data.
+	  * @param count total collected data count.
+	  */
+	class State (
+		var min: T,
+		var max: T,
+		var total: T,
+		var count: Int
+	) {
+		/** Generate the [[State.Immutable]] readonly copy for this. */
+		def readonly: State.Immutable = State.Immutable(this)
+	}
+	object State:
+		/** The immutable (readonly) version [[State]]. */
+		class Immutable (source: State):
+			/** @see [[State.min]] */
+			val min: T = source.min
+			/** @see [[State.max]] */
+			val max: T = source.max
+			/** @see [[State.total]] */
+			val total: T = source.total
+			/** @see [[State.count]] */
+			val count: Int = source.count
+	
+	private var state: Option[State] = None
+	
+	/** Collect a new data to the statistic.
+	  * @return The [[NumericStatistics]] itself for chained call.
+	  */
+	@targetName("collect")
+	def ++ (newOne: T): this.type =
+		state match
+			case Some(current) =>
+				if (role.lt(newOne, current.min)) current.min = newOne
+				if (role.gt(newOne, current.max)) current.max = newOne
+				current.total = role.plus(current.total, newOne)
+				current.count = current.count + 1
+			case None =>
+				state = Some(new State (
+					min = newOne,
+					max = newOne,
+					total = newOne,
+					count = 1
+				))
+		this
+	
+	/** Reset the statistics to the initial state.
+	  *
+	  * All the collected data will be drop.
+	  */
+	def reset (): Unit =
+		state = None
+	
+	/** Get the statistic values.
+	  *
+	  * @return An [[Option]] contains one [[State.Immutable]] object
+	  *         which refers the statistic state when call this method.
+	  *         If the statistic have no data recorded, then it will
+	  *         be [[None]]
+	  */
+	def value: Option[State.Immutable] =
+		state match
+			case Some(v) => Some(v.readonly)
+			case None => None
+	
+	/** The number counts in the statistics.
+	  *
+	  * It will always returns a [[Int]] value, regardless if the
+	  * statistic is collected some data.
+	  */
+	def count: Int =
+		state match
+			case Some(value) => value.count
+			case None => 0
+	
+}

src/main/scala/cc/sukazyo/cono/morny/util/time/WatchDog.scala

@@ -0,0 +1,67 @@
+package cc.sukazyo.cono.morny.util.time
+
+import cc.sukazyo.cono.morny.util.EpochDateTime.{DurationMillis, EpochMillis}
+
+trait WatchDog (val isDaemonIt: Boolean = true) extends Thread {
+	
+	val threadName: String = "watch-dog"
+	val tickSpeedMillis: DurationMillis = 1000
+	val overloadMillis: DurationMillis = tickSpeedMillis + (tickSpeedMillis/2)
+	private var previousTickTimeMillis: Option[EpochMillis] = None
+	
+	this setName threadName
+	this setDaemon isDaemonIt
+	
+	this.start()
+	
+	override def run(): Unit = {
+		while (!this.isInterrupted) {
+			val currentMillis = System.currentTimeMillis()
+			previousTickTimeMillis match
+				case Some(_previousMillis) =>
+					val consumedMillis = currentMillis - _previousMillis
+					if consumedMillis > overloadMillis then
+						this.overloaded(consumedMillis, consumedMillis - _previousMillis)
+					previousTickTimeMillis = Some(currentMillis)
+				case _ =>
+					previousTickTimeMillis = Some(currentMillis)
+			try Thread.sleep(tickSpeedMillis)
+			catch case _: InterruptedException =>
+				this.interrupt()
+		}
+	}
+	
+	def overloaded(consumed: DurationMillis, delayed: DurationMillis): Unit
+	
+}
+
+object WatchDog {
+	
+	def apply (
+		_threadName: String, _tickSpeedMillis: DurationMillis, _overloadMillis: DurationMillis,
+		overloadedCallback: (DurationMillis, DurationMillis) => Unit
+	): WatchDog =
+		new WatchDog:
+			override val threadName: String = _threadName
+			override val tickSpeedMillis: DurationMillis = _tickSpeedMillis
+			override val overloadMillis: DurationMillis = _overloadMillis
+			override def overloaded (consumed: DurationMillis, delayed: DurationMillis): Unit = overloadedCallback(consumed, delayed)
+	
+	def apply (
+		_threadName: String, _tickSpeedMillis: DurationMillis,
+		overloadedCallback: (DurationMillis, DurationMillis) => Unit
+	): WatchDog =
+		new WatchDog:
+			override val threadName: String = _threadName
+			override val tickSpeedMillis: DurationMillis = _tickSpeedMillis
+			override def overloaded (consumed: DurationMillis, delayed: DurationMillis): Unit = overloadedCallback(consumed, delayed)
+	
+	def apply (
+		_threadName: String,
+		overloadedCallback: (DurationMillis, DurationMillis) => Unit
+	): WatchDog =
+		new WatchDog:
+			override val threadName: String = _threadName
+			override def overloaded (consumed: DurationMillis, delayed: DurationMillis): Unit = overloadedCallback(consumed, delayed)
+	
+}