src/Pure/System/session.scala
author wenzelm
Fri Aug 09 11:18:36 2013 +0200 (2013-08-09 ago)
changeset 52931 ac6648c0c0fb
parent 52800 1baa5d19ac44
child 53054 8365d7fca3de
permissions -rw-r--r--
cancel_query via direct access to the exec_id of the running query process;
wenzelm@36676
     1
/*  Title:      Pure/System/session.scala
wenzelm@36676
     2
    Author:     Makarius
wenzelm@38221
     3
    Options:    :folding=explicit:collapseFolds=1:
wenzelm@36676
     4
wenzelm@43651
     5
Main Isabelle/Scala session, potentially with running prover process.
wenzelm@36676
     6
*/
wenzelm@34777
     7
wenzelm@34871
     8
package isabelle
wenzelm@34777
     9
wenzelm@44733
    10
wenzelm@43520
    11
import java.lang.System
wenzelm@44733
    12
import java.util.{Timer, TimerTask}
wenzelm@34777
    13
wenzelm@44733
    14
import scala.collection.mutable
wenzelm@46771
    15
import scala.collection.immutable.Queue
wenzelm@34820
    16
import scala.actors.TIMEOUT
wenzelm@34777
    17
import scala.actors.Actor._
wenzelm@34777
    18
wenzelm@34815
    19
wenzelm@34791
    20
object Session
wenzelm@34791
    21
{
wenzelm@34813
    22
  /* events */
wenzelm@34813
    23
wenzelm@43716
    24
  //{{{
wenzelm@50697
    25
  case class Statistics(props: Properties.T)
wenzelm@50117
    26
  case class Global_Options(options: Options)
wenzelm@44805
    27
  case object Caret_Focus
wenzelm@49196
    28
  case class Raw_Edits(edits: List[Document.Edit_Text])
wenzelm@52531
    29
  case class Dialog_Result(id: Document_ID.Generic, serial: Long, result: String)
wenzelm@47027
    30
  case class Commands_Changed(
wenzelm@47027
    31
    assignment: Boolean, nodes: Set[Document.Node.Name], commands: Set[Command])
wenzelm@39630
    32
wenzelm@39630
    33
  sealed abstract class Phase
wenzelm@39630
    34
  case object Inactive extends Phase
wenzelm@39701
    35
  case object Startup extends Phase  // transient
wenzelm@39701
    36
  case object Failed extends Phase
wenzelm@39630
    37
  case object Ready extends Phase
wenzelm@39701
    38
  case object Shutdown extends Phase  // transient
wenzelm@43716
    39
  //}}}
wenzelm@52111
    40
wenzelm@52111
    41
wenzelm@52111
    42
  /* protocol handlers */
wenzelm@52111
    43
wenzelm@52111
    44
  type Prover = Isabelle_Process with Protocol
wenzelm@52111
    45
wenzelm@52111
    46
  abstract class Protocol_Handler
wenzelm@52111
    47
  {
wenzelm@52111
    48
    def stop(prover: Prover): Unit = {}
wenzelm@52111
    49
    val functions: Map[String, (Prover, Isabelle_Process.Output) => Boolean]
wenzelm@52111
    50
  }
wenzelm@52111
    51
wenzelm@52111
    52
  class Protocol_Handlers(
wenzelm@52111
    53
    handlers: Map[String, Session.Protocol_Handler] = Map.empty,
wenzelm@52111
    54
    functions: Map[String, Isabelle_Process.Output => Boolean] = Map.empty)
wenzelm@52111
    55
  {
wenzelm@52111
    56
    def add(prover: Prover, name: String): Protocol_Handlers =
wenzelm@52111
    57
    {
wenzelm@52111
    58
      val (handlers1, functions1) =
wenzelm@52111
    59
        handlers.get(name) match {
wenzelm@52111
    60
          case Some(old_handler) =>
wenzelm@52111
    61
            System.err.println("Redefining protocol handler: " + name)
wenzelm@52111
    62
            old_handler.stop(prover)
wenzelm@52111
    63
            (handlers - name, functions -- old_handler.functions.keys)
wenzelm@52111
    64
          case None => (handlers, functions)
wenzelm@52111
    65
        }
wenzelm@52111
    66
wenzelm@52111
    67
      val (handlers2, functions2) =
wenzelm@52111
    68
        try {
wenzelm@52111
    69
          val new_handler = Class.forName(name).newInstance.asInstanceOf[Protocol_Handler]
wenzelm@52111
    70
          val new_functions =
wenzelm@52111
    71
            for ((a, f) <- new_handler.functions.toList) yield
wenzelm@52111
    72
              (a, (output: Isabelle_Process.Output) => f(prover, output))
wenzelm@52111
    73
wenzelm@52111
    74
          val dups = for ((a, _) <- new_functions if functions1.isDefinedAt(a)) yield a
wenzelm@52111
    75
          if (!dups.isEmpty) error("Duplicate protocol functions: " + commas_quote(dups))
wenzelm@52111
    76
wenzelm@52111
    77
          (handlers1 + (name -> new_handler), functions1 ++ new_functions)
wenzelm@52111
    78
        }
wenzelm@52111
    79
        catch {
wenzelm@52111
    80
          case exn: Throwable =>
wenzelm@52111
    81
            System.err.println("Failed to initialize protocol handler: " +
wenzelm@52111
    82
              name + "\n" + Exn.message(exn))
wenzelm@52111
    83
            (handlers1, functions1)
wenzelm@52111
    84
        }
wenzelm@52111
    85
wenzelm@52111
    86
      new Protocol_Handlers(handlers2, functions2)
wenzelm@52111
    87
    }
wenzelm@52111
    88
wenzelm@52111
    89
    def invoke(output: Isabelle_Process.Output): Boolean =
wenzelm@52111
    90
      output.properties match {
wenzelm@52111
    91
        case Markup.Function(a) if functions.isDefinedAt(a) =>
wenzelm@52111
    92
          try { functions(a)(output) }
wenzelm@52111
    93
          catch {
wenzelm@52111
    94
            case exn: Throwable =>
wenzelm@52111
    95
              System.err.println("Failed invocation of protocol function: " +
wenzelm@52111
    96
                quote(a) + "\n" + Exn.message(exn))
wenzelm@52111
    97
            false
wenzelm@52111
    98
          }
wenzelm@52111
    99
        case _ => false
wenzelm@52111
   100
      }
wenzelm@52113
   101
wenzelm@52113
   102
    def stop(prover: Prover): Protocol_Handlers =
wenzelm@52113
   103
    {
wenzelm@52113
   104
      for ((_, handler) <- handlers) handler.stop(prover)
wenzelm@52113
   105
      new Protocol_Handlers()
wenzelm@52113
   106
    }
wenzelm@52111
   107
  }
wenzelm@34791
   108
}
wenzelm@34791
   109
wenzelm@34777
   110
wenzelm@48870
   111
class Session(val thy_load: Thy_Load)
wenzelm@34777
   112
{
wenzelm@47653
   113
  /* global flags */
wenzelm@47653
   114
wenzelm@47653
   115
  @volatile var timing: Boolean = false
wenzelm@47653
   116
  @volatile var verbose: Boolean = false
wenzelm@47653
   117
wenzelm@47653
   118
wenzelm@49288
   119
  /* tuning parameters */
wenzelm@49288
   120
wenzelm@49288
   121
  def output_delay: Time = Time.seconds(0.1)  // prover output (markup, common messages)
wenzelm@52800
   122
  def message_delay: Time = Time.seconds(0.1)  // prover input/output messages
wenzelm@49293
   123
  def prune_delay: Time = Time.seconds(60.0)  // prune history -- delete old versions
wenzelm@49293
   124
  def prune_size: Int = 0  // size of retained history
wenzelm@49293
   125
  def syslog_limit: Int = 100
wenzelm@49524
   126
  def reparse_limit: Int = 0
wenzelm@37849
   127
wenzelm@37849
   128
wenzelm@34809
   129
  /* pervasive event buses */
wenzelm@34809
   130
wenzelm@50433
   131
  val statistics = new Event_Bus[Session.Statistics]
wenzelm@50117
   132
  val global_options = new Event_Bus[Session.Global_Options]
wenzelm@44805
   133
  val caret_focus = new Event_Bus[Session.Caret_Focus.type]
wenzelm@49196
   134
  val raw_edits = new Event_Bus[Session.Raw_Edits]
wenzelm@43716
   135
  val commands_changed = new Event_Bus[Session.Commands_Changed]
wenzelm@43716
   136
  val phase_changed = new Event_Bus[Session.Phase]
wenzelm@46772
   137
  val syslog_messages = new Event_Bus[Isabelle_Process.Output]
wenzelm@46772
   138
  val raw_output_messages = new Event_Bus[Isabelle_Process.Output]
wenzelm@46774
   139
  val all_messages = new Event_Bus[Isabelle_Process.Message]  // potential bottle-neck
wenzelm@43716
   140
wenzelm@34809
   141
wenzelm@34809
   142
wenzelm@38841
   143
  /** buffered command changes (delay_first discipline) **/
wenzelm@38841
   144
wenzelm@43716
   145
  //{{{
wenzelm@38841
   146
  private case object Stop
wenzelm@38841
   147
wenzelm@44722
   148
  private val (_, commands_changed_buffer) =
wenzelm@44722
   149
    Simple_Thread.actor("commands_changed_buffer", daemon = true)
wenzelm@38841
   150
  {
wenzelm@38841
   151
    var finished = false
wenzelm@38841
   152
    while (!finished) {
wenzelm@44722
   153
      receive {
wenzelm@39630
   154
        case Stop => finished = true; reply(())
wenzelm@44722
   155
        case changed: Session.Commands_Changed => commands_changed.event(changed)
wenzelm@44722
   156
        case bad => System.err.println("commands_changed_buffer: ignoring bad message " + bad)
wenzelm@38841
   157
      }
wenzelm@38841
   158
    }
wenzelm@38841
   159
  }
wenzelm@38841
   160
  //}}}
wenzelm@38841
   161
wenzelm@38841
   162
wenzelm@45635
   163
  /** pipelined change parsing **/
wenzelm@45635
   164
wenzelm@45635
   165
  //{{{
wenzelm@45635
   166
  private case class Text_Edits(
wenzelm@45635
   167
    previous: Future[Document.Version],
wenzelm@45635
   168
    text_edits: List[Document.Edit_Text],
wenzelm@45635
   169
    version_result: Promise[Document.Version])
wenzelm@45635
   170
wenzelm@45635
   171
  private val (_, change_parser) = Simple_Thread.actor("change_parser", daemon = true)
wenzelm@45635
   172
  {
wenzelm@45635
   173
    var finished = false
wenzelm@45635
   174
    while (!finished) {
wenzelm@45635
   175
      receive {
wenzelm@45635
   176
        case Stop => finished = true; reply(())
wenzelm@45635
   177
wenzelm@47629
   178
        case Text_Edits(previous, text_edits, version_result) =>
wenzelm@45635
   179
          val prev = previous.get_finished
wenzelm@47653
   180
          val (doc_edits, version) =
wenzelm@50566
   181
            Timing.timeit("Thy_Load.text_edits", timing) {
wenzelm@50566
   182
              thy_load.text_edits(reparse_limit, prev, text_edits)
wenzelm@47653
   183
            }
wenzelm@45635
   184
          version_result.fulfill(version)
wenzelm@47629
   185
          sender ! Change(doc_edits, prev, version)
wenzelm@45635
   186
wenzelm@45635
   187
        case bad => System.err.println("change_parser: ignoring bad message " + bad)
wenzelm@45635
   188
      }
wenzelm@45635
   189
    }
wenzelm@45635
   190
  }
wenzelm@45635
   191
  //}}}
wenzelm@45635
   192
wenzelm@38841
   193
wenzelm@47653
   194
wenzelm@38841
   195
  /** main protocol actor **/
wenzelm@34809
   196
wenzelm@43651
   197
  /* global state */
wenzelm@43644
   198
wenzelm@46771
   199
  private val syslog = Volatile(Queue.empty[XML.Elem])
wenzelm@49416
   200
  def current_syslog(): String = cat_lines(syslog().iterator.map(XML.content))
wenzelm@39626
   201
wenzelm@39630
   202
  @volatile private var _phase: Session.Phase = Session.Inactive
wenzelm@39633
   203
  private def phase_=(new_phase: Session.Phase)
wenzelm@39630
   204
  {
wenzelm@39630
   205
    _phase = new_phase
wenzelm@39701
   206
    phase_changed.event(new_phase)
wenzelm@39630
   207
  }
wenzelm@43716
   208
  def phase = _phase
wenzelm@43553
   209
  def is_ready: Boolean = phase == Session.Ready
wenzelm@39630
   210
wenzelm@45248
   211
  private val global_state = Volatile(Document.State.init)
wenzelm@43719
   212
  def current_state(): Document.State = global_state()
wenzelm@46944
   213
wenzelm@46944
   214
  def recent_syntax(): Outer_Syntax =
wenzelm@46944
   215
  {
wenzelm@46944
   216
    val version = current_state().recent_finished.version.get_finished
wenzelm@48870
   217
    if (version.is_init) thy_load.base_syntax
wenzelm@46944
   218
    else version.syntax
wenzelm@46944
   219
  }
wenzelm@34816
   220
wenzelm@44960
   221
  def snapshot(name: Document.Node.Name = Document.Node.Name.empty,
wenzelm@44960
   222
      pending_edits: List[Text.Edit] = Nil): Document.Snapshot =
wenzelm@43719
   223
    global_state().snapshot(name, pending_edits)
wenzelm@43716
   224
wenzelm@43651
   225
wenzelm@43651
   226
  /* theory files */
wenzelm@43651
   227
wenzelm@48707
   228
  def header_edit(name: Document.Node.Name, header: Document.Node.Header): Document.Edit_Text =
wenzelm@44442
   229
  {
wenzelm@48707
   230
    val header1 =
wenzelm@48870
   231
      if (thy_load.loaded_theories(name.theory))
wenzelm@48707
   232
        header.error("Attempt to update loaded theory " + quote(name.theory))
wenzelm@48707
   233
      else header
wenzelm@48707
   234
    (name, Document.Node.Deps(header1))
wenzelm@44442
   235
  }
wenzelm@44442
   236
wenzelm@43651
   237
wenzelm@43651
   238
  /* actor messages */
wenzelm@43651
   239
wenzelm@48870
   240
  private case class Start(args: List[String])
wenzelm@52931
   241
  private case class Cancel_Exec(exec_id: Document_ID.Exec)
wenzelm@47629
   242
  private case class Change(
wenzelm@43722
   243
    doc_edits: List[Document.Edit_Command],
wenzelm@43722
   244
    previous: Document.Version,
wenzelm@43722
   245
    version: Document.Version)
wenzelm@44733
   246
  private case class Messages(msgs: List[Isabelle_Process.Message])
wenzelm@52084
   247
  private case class Update_Options(options: Options)
wenzelm@41534
   248
wenzelm@39572
   249
  private val (_, session_actor) = Simple_Thread.actor("session_actor", daemon = true)
wenzelm@38639
   250
  {
wenzelm@43648
   251
    val this_actor = self
wenzelm@34809
   252
wenzelm@52111
   253
    var protocol_handlers = new Session.Protocol_Handlers()
wenzelm@44676
   254
wenzelm@52111
   255
    var prune_next = System.currentTimeMillis() + prune_delay.ms
wenzelm@49470
   256
wenzelm@34809
   257
wenzelm@44733
   258
    /* buffered prover messages */
wenzelm@44733
   259
wenzelm@44733
   260
    object receiver
wenzelm@44733
   261
    {
wenzelm@44733
   262
      private var buffer = new mutable.ListBuffer[Isabelle_Process.Message]
wenzelm@44733
   263
wenzelm@52800
   264
      private def flush(): Unit = synchronized {
wenzelm@44733
   265
        if (!buffer.isEmpty) {
wenzelm@44733
   266
          val msgs = buffer.toList
wenzelm@44733
   267
          this_actor ! Messages(msgs)
wenzelm@44733
   268
          buffer = new mutable.ListBuffer[Isabelle_Process.Message]
wenzelm@44733
   269
        }
wenzelm@44733
   270
      }
wenzelm@44733
   271
      def invoke(msg: Isabelle_Process.Message): Unit = synchronized {
wenzelm@44733
   272
        msg match {
wenzelm@52800
   273
          case _: Isabelle_Process.Input =>
wenzelm@52800
   274
            buffer += msg
wenzelm@46772
   275
          case output: Isabelle_Process.Output =>
wenzelm@52800
   276
            if (output.is_protocol && output.properties == Markup.Flush) flush()
wenzelm@52800
   277
            else {
wenzelm@52800
   278
              buffer += msg
wenzelm@52800
   279
              if (output.is_syslog)
wenzelm@52800
   280
                syslog >> (queue =>
wenzelm@52800
   281
                  {
wenzelm@52800
   282
                    val queue1 = queue.enqueue(output.message)
wenzelm@52800
   283
                    if (queue1.length > syslog_limit) queue1.dequeue._2 else queue1
wenzelm@52800
   284
                  })
wenzelm@52800
   285
            }
wenzelm@44733
   286
        }
wenzelm@44733
   287
      }
wenzelm@44733
   288
wenzelm@44733
   289
      private val timer = new Timer("session_actor.receiver", true)
wenzelm@44733
   290
      timer.schedule(new TimerTask { def run = flush }, message_delay.ms, message_delay.ms)
wenzelm@44733
   291
wenzelm@44733
   292
      def cancel() { timer.cancel() }
wenzelm@44733
   293
    }
wenzelm@44733
   294
wenzelm@52111
   295
    var prover: Option[Session.Prover] = None
wenzelm@44733
   296
wenzelm@44733
   297
wenzelm@44722
   298
    /* delayed command changes */
wenzelm@44722
   299
wenzelm@46570
   300
    object delay_commands_changed
wenzelm@44722
   301
    {
wenzelm@47027
   302
      private var changed_assignment: Boolean = false
wenzelm@44722
   303
      private var changed_nodes: Set[Document.Node.Name] = Set.empty
wenzelm@44722
   304
      private var changed_commands: Set[Command] = Set.empty
wenzelm@44722
   305
wenzelm@44722
   306
      private var flush_time: Option[Long] = None
wenzelm@44722
   307
wenzelm@44722
   308
      def flush_timeout: Long =
wenzelm@44722
   309
        flush_time match {
wenzelm@44722
   310
          case None => 5000L
wenzelm@44722
   311
          case Some(time) => (time - System.currentTimeMillis()) max 0
wenzelm@44722
   312
        }
wenzelm@44722
   313
wenzelm@44722
   314
      def flush()
wenzelm@44722
   315
      {
wenzelm@47027
   316
        if (changed_assignment || !changed_nodes.isEmpty || !changed_commands.isEmpty)
wenzelm@47027
   317
          commands_changed_buffer !
wenzelm@47027
   318
            Session.Commands_Changed(changed_assignment, changed_nodes, changed_commands)
wenzelm@47027
   319
        changed_assignment = false
wenzelm@44722
   320
        changed_nodes = Set.empty
wenzelm@44722
   321
        changed_commands = Set.empty
wenzelm@44722
   322
        flush_time = None
wenzelm@44722
   323
      }
wenzelm@44722
   324
wenzelm@47027
   325
      def invoke(assign: Boolean, commands: List[Command])
wenzelm@44722
   326
      {
wenzelm@47027
   327
        changed_assignment |= assign
wenzelm@47027
   328
        for (command <- commands) {
wenzelm@47027
   329
          changed_nodes += command.node_name
wenzelm@47027
   330
          changed_commands += command
wenzelm@47027
   331
        }
wenzelm@44722
   332
        val now = System.currentTimeMillis()
wenzelm@44722
   333
        flush_time match {
wenzelm@44722
   334
          case None => flush_time = Some(now + output_delay.ms)
wenzelm@44722
   335
          case Some(time) => if (now >= time) flush()
wenzelm@44722
   336
        }
wenzelm@44722
   337
      }
wenzelm@44722
   338
    }
wenzelm@44722
   339
wenzelm@44722
   340
wenzelm@52649
   341
    /* raw edits */
wenzelm@52649
   342
wenzelm@52649
   343
    def handle_raw_edits(edits: List[Document.Edit_Text])
wenzelm@52649
   344
    //{{{
wenzelm@52649
   345
    {
wenzelm@52649
   346
      prover.get.discontinue_execution()
wenzelm@52649
   347
wenzelm@52649
   348
      val previous = global_state().history.tip.version
wenzelm@52649
   349
      val version = Future.promise[Document.Version]
wenzelm@52649
   350
      val change = global_state >>> (_.continue_history(previous, edits, version))
wenzelm@52649
   351
wenzelm@52649
   352
      raw_edits.event(Session.Raw_Edits(edits))
wenzelm@52649
   353
      change_parser ! Text_Edits(previous, edits, version)
wenzelm@52649
   354
    }
wenzelm@52649
   355
    //}}}
wenzelm@52649
   356
wenzelm@52649
   357
wenzelm@43716
   358
    /* resulting changes */
wenzelm@34809
   359
wenzelm@47629
   360
    def handle_change(change: Change)
wenzelm@38221
   361
    //{{{
wenzelm@34809
   362
    {
wenzelm@43722
   363
      val previous = change.previous
wenzelm@43722
   364
      val version = change.version
wenzelm@43722
   365
      val doc_edits = change.doc_edits
wenzelm@38366
   366
wenzelm@44383
   367
      def id_command(command: Command)
wenzelm@43720
   368
      {
wenzelm@44582
   369
        if (!global_state().defined_command(command.id)) {
wenzelm@46687
   370
          global_state >> (_.define_command(command))
wenzelm@44644
   371
          prover.get.define_command(command)
wenzelm@43720
   372
        }
wenzelm@43720
   373
      }
wenzelm@44383
   374
      doc_edits foreach {
wenzelm@44383
   375
        case (_, edit) =>
wenzelm@44383
   376
          edit foreach { case (c1, c2) => c1 foreach id_command; c2 foreach id_command }
wenzelm@44383
   377
      }
wenzelm@43722
   378
wenzelm@44479
   379
      val assignment = global_state().the_assignment(previous).check_finished
wenzelm@46687
   380
      global_state >> (_.define_version(version, assignment))
wenzelm@44481
   381
      prover.get.update(previous.id, version.id, doc_edits)
wenzelm@34809
   382
    }
wenzelm@38221
   383
    //}}}
wenzelm@34809
   384
wenzelm@34809
   385
wenzelm@46772
   386
    /* prover output */
wenzelm@34809
   387
wenzelm@46772
   388
    def handle_output(output: Isabelle_Process.Output)
wenzelm@38221
   389
    //{{{
wenzelm@34809
   390
    {
wenzelm@51662
   391
      def bad_output()
wenzelm@43716
   392
      {
wenzelm@43716
   393
        if (verbose)
wenzelm@46772
   394
          System.err.println("Ignoring prover output: " + output.message.toString)
wenzelm@43716
   395
      }
wenzelm@43716
   396
wenzelm@52531
   397
      def accumulate(state_id: Document_ID.Generic, message: XML.Elem)
wenzelm@51662
   398
      {
wenzelm@51662
   399
        try {
wenzelm@51662
   400
          val st = global_state >>> (_.accumulate(state_id, message))
wenzelm@51662
   401
          delay_commands_changed.invoke(false, List(st.command))
wenzelm@51662
   402
        }
wenzelm@51662
   403
        catch {
wenzelm@51662
   404
          case _: Document.State.Fail => bad_output()
wenzelm@51662
   405
        }
wenzelm@51662
   406
      }
wenzelm@51662
   407
wenzelm@52111
   408
      if (output.is_protocol) {
wenzelm@52111
   409
        val handled = protocol_handlers.invoke(output)
wenzelm@52111
   410
        if (!handled) {
wenzelm@52111
   411
          output.properties match {
wenzelm@52111
   412
            case Markup.Protocol_Handler(name) =>
wenzelm@52111
   413
              protocol_handlers = protocol_handlers.add(prover.get, name)
wenzelm@46122
   414
wenzelm@52111
   415
            case Protocol.Command_Timing(state_id, timing) =>
wenzelm@52111
   416
              val message = XML.elem(Markup.STATUS, List(XML.Elem(Markup.Timing(timing), Nil)))
wenzelm@52111
   417
              accumulate(state_id, prover.get.xml_cache.elem(message))
wenzelm@46122
   418
wenzelm@52563
   419
            case Markup.Assign_Update =>
wenzelm@52111
   420
              XML.content(output.body) match {
wenzelm@52563
   421
                case Protocol.Assign_Update(id, update) =>
wenzelm@52111
   422
                  try {
wenzelm@52563
   423
                    val cmds = global_state >>> (_.assign(id, update))
wenzelm@52111
   424
                    delay_commands_changed.invoke(true, cmds)
wenzelm@52111
   425
                  }
wenzelm@52111
   426
                  catch { case _: Document.State.Fail => bad_output() }
wenzelm@52111
   427
                case _ => bad_output()
wenzelm@52111
   428
              }
wenzelm@52111
   429
              // FIXME separate timeout event/message!?
wenzelm@52111
   430
              if (prover.isDefined && System.currentTimeMillis() > prune_next) {
wenzelm@52111
   431
                val old_versions = global_state >>> (_.prune_history(prune_size))
wenzelm@52111
   432
                if (!old_versions.isEmpty) prover.get.remove_versions(old_versions)
wenzelm@52111
   433
                prune_next = System.currentTimeMillis() + prune_delay.ms
wenzelm@47629
   434
              }
wenzelm@52111
   435
wenzelm@52111
   436
            case Markup.Removed_Versions =>
wenzelm@52111
   437
              XML.content(output.body) match {
wenzelm@52111
   438
                case Protocol.Removed(removed) =>
wenzelm@52111
   439
                  try {
wenzelm@52111
   440
                    global_state >> (_.removed_versions(removed))
wenzelm@52111
   441
                  }
wenzelm@52111
   442
                  catch { case _: Document.State.Fail => bad_output() }
wenzelm@52111
   443
                case _ => bad_output()
wenzelm@52111
   444
              }
wenzelm@52111
   445
wenzelm@52111
   446
            case Markup.ML_Statistics(props) =>
wenzelm@52111
   447
              statistics.event(Session.Statistics(props))
wenzelm@52111
   448
wenzelm@52111
   449
            case Markup.Task_Statistics(props) =>
wenzelm@52111
   450
              // FIXME
wenzelm@52111
   451
wenzelm@51662
   452
            case _ => bad_output()
wenzelm@44661
   453
          }
wenzelm@52111
   454
        }
wenzelm@52111
   455
      }
wenzelm@52111
   456
      else {
wenzelm@52111
   457
        output.properties match {
wenzelm@52111
   458
          case Position.Id(state_id) =>
wenzelm@52111
   459
            accumulate(state_id, output.message)
wenzelm@46122
   460
wenzelm@52111
   461
          case _ if output.is_init =>
wenzelm@52111
   462
            phase = Session.Ready
wenzelm@46122
   463
wenzelm@52111
   464
          case Markup.Return_Code(rc) if output.is_exit =>
wenzelm@52111
   465
            if (rc == 0) phase = Session.Inactive
wenzelm@52111
   466
            else phase = Session.Failed
wenzelm@50255
   467
wenzelm@52766
   468
          case _ => raw_output_messages.event(output)
wenzelm@52111
   469
        }
wenzelm@43748
   470
      }
wenzelm@34809
   471
    }
wenzelm@38221
   472
    //}}}
wenzelm@34809
   473
wenzelm@34820
   474
wenzelm@39630
   475
    /* main loop */
wenzelm@34809
   476
wenzelm@43716
   477
    //{{{
wenzelm@38639
   478
    var finished = false
wenzelm@38639
   479
    while (!finished) {
wenzelm@46570
   480
      receiveWithin(delay_commands_changed.flush_timeout) {
wenzelm@46570
   481
        case TIMEOUT => delay_commands_changed.flush()
wenzelm@44722
   482
wenzelm@48870
   483
        case Start(args) if prover.isEmpty =>
wenzelm@39701
   484
          if (phase == Session.Inactive || phase == Session.Failed) {
wenzelm@39701
   485
            phase = Session.Startup
wenzelm@48020
   486
            prover = Some(new Isabelle_Process(receiver.invoke _, args) with Protocol)
wenzelm@39701
   487
          }
wenzelm@38841
   488
wenzelm@39701
   489
        case Stop =>
wenzelm@39701
   490
          if (phase == Session.Ready) {
wenzelm@52113
   491
            protocol_handlers = protocol_handlers.stop(prover.get)
wenzelm@46687
   492
            global_state >> (_ => Document.State.init)  // FIXME event bus!?
wenzelm@39701
   493
            phase = Session.Shutdown
wenzelm@43649
   494
            prover.get.terminate
wenzelm@43717
   495
            prover = None
wenzelm@39701
   496
            phase = Session.Inactive
wenzelm@39701
   497
          }
wenzelm@39630
   498
          finished = true
wenzelm@44733
   499
          receiver.cancel()
wenzelm@39630
   500
          reply(())
wenzelm@38850
   501
wenzelm@52084
   502
        case Update_Options(options) if prover.isDefined =>
wenzelm@52649
   503
          if (is_ready) {
wenzelm@52649
   504
            prover.get.options(options)
wenzelm@52649
   505
            handle_raw_edits(Nil)
wenzelm@52649
   506
          }
wenzelm@52084
   507
          global_options.event(Session.Global_Options(options))
wenzelm@52084
   508
          reply(())
wenzelm@50117
   509
wenzelm@52931
   510
        case Cancel_Exec(exec_id) if prover.isDefined =>
wenzelm@52931
   511
          prover.get.cancel_exec(exec_id)
wenzelm@52931
   512
wenzelm@52649
   513
        case Session.Raw_Edits(edits) if prover.isDefined =>
wenzelm@52649
   514
          handle_raw_edits(edits)
wenzelm@43718
   515
          reply(())
wenzelm@43718
   516
wenzelm@50500
   517
        case Session.Dialog_Result(id, serial, result) if prover.isDefined =>
wenzelm@50500
   518
          prover.get.dialog_result(serial, result)
wenzelm@50501
   519
          handle_output(new Isabelle_Process.Output(Protocol.Dialog_Result(id, serial, result)))
wenzelm@50498
   520
wenzelm@44733
   521
        case Messages(msgs) =>
wenzelm@44733
   522
          msgs foreach {
wenzelm@44733
   523
            case input: Isabelle_Process.Input =>
wenzelm@46774
   524
              all_messages.event(input)
wenzelm@43721
   525
wenzelm@46772
   526
            case output: Isabelle_Process.Output =>
wenzelm@48999
   527
              if (output.is_stdout || output.is_stderr) raw_output_messages.event(output)
wenzelm@48999
   528
              else handle_output(output)
wenzelm@46772
   529
              if (output.is_syslog) syslog_messages.event(output)
wenzelm@46774
   530
              all_messages.event(output)
wenzelm@44733
   531
          }
wenzelm@43716
   532
wenzelm@47629
   533
        case change: Change
wenzelm@45635
   534
        if prover.isDefined && global_state().is_assigned(change.previous) =>
wenzelm@45635
   535
          handle_change(change)
wenzelm@45635
   536
wenzelm@47629
   537
        case bad if !bad.isInstanceOf[Change] =>
wenzelm@45635
   538
          System.err.println("session_actor: ignoring bad message " + bad)
wenzelm@34777
   539
      }
wenzelm@34777
   540
    }
wenzelm@43716
   541
    //}}}
wenzelm@34777
   542
  }
wenzelm@34777
   543
wenzelm@34809
   544
wenzelm@43716
   545
  /* actions */
wenzelm@34809
   546
wenzelm@48870
   547
  def start(args: List[String])
wenzelm@50117
   548
  {
wenzelm@50117
   549
    session_actor ! Start(args)
wenzelm@50117
   550
  }
wenzelm@45076
   551
wenzelm@50117
   552
  def stop()
wenzelm@50117
   553
  {
wenzelm@50117
   554
    commands_changed_buffer !? Stop
wenzelm@50117
   555
    change_parser !? Stop
wenzelm@50117
   556
    session_actor !? Stop
wenzelm@50117
   557
  }
wenzelm@38841
   558
wenzelm@52931
   559
  def cancel_exec(exec_id: Document_ID.Exec) { session_actor ! Cancel_Exec(exec_id) }
wenzelm@52931
   560
wenzelm@50363
   561
  def update(edits: List[Document.Edit_Text])
wenzelm@50745
   562
  { if (!edits.isEmpty) session_actor !? Session.Raw_Edits(edits) }
wenzelm@50498
   563
wenzelm@52084
   564
  def update_options(options: Options)
wenzelm@52084
   565
  { session_actor !? Update_Options(options) }
wenzelm@52084
   566
wenzelm@52531
   567
  def dialog_result(id: Document_ID.Generic, serial: Long, result: String)
wenzelm@50500
   568
  { session_actor ! Session.Dialog_Result(id, serial, result) }
wenzelm@34777
   569
}