### Home Classes Methods

### In Files

- lib/taskjuggler/daemon/ProcessIntercom.rb

### Methods

- #checkKey
- #connect
- #disconnect
- #generateAuthKey
- #initIntercom
- #restartTimer
- #startTerminator
- #terminate
- #timerExpired?

### Included Modules

- TaskJuggler::MessageHandler

### Files

- CHANGELOG
- COPYING
- README.rdoc

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No matching classes.

# TaskJuggler::ProcessIntercom

### Public Instance Methods

checkKey(authKey, command) click to toggle source

    # File lib/taskjuggler/daemon/ProcessIntercom.rb, line 125
    def checkKey(authKey, command)
      if authKey == @authKey
        debug('', "Accepted authentication key for command '#{command}'")
      else
        warning('auth_key_rejected',
                "Rejected wrong authentication key #{authKey}" +
                "for command '#{command}'")
        return false
      end
      true
    end

connect(stdout, stderr, stdin, silent) click to toggle source

    # File lib/taskjuggler/daemon/ProcessIntercom.rb, line 91
    def connect(stdout, stderr, stdin, silent)
      # Set the client lock.
      @clientConnection.lock
      debug('', 'Rerouting ProjectServer standard IO to client')
      # Make sure that all output to STDOUT and STDERR is sent to the client.
      # Input is read from the client STDIN.  We save a copy of the old file
      # handles so we can restore then later again.
      @stdout = $stdout
      @stderr = $stderr
      @stdin = $stdin
      $stdout = stdout if stdout
      $stderr = stderr if stdout
      $stdin = stdin if stdin
      debug('', 'IO is now routed to the client')
      Log.silent = silent
      true
    end

disconnect() click to toggle source

    # File lib/taskjuggler/daemon/ProcessIntercom.rb, line 109
    def disconnect
      debug('', 'Restoring IO')
      Log.silent = true
      $stdout = @stdout if @stdout
      $stderr = @stderr if @stderr
      $stdin = @stdin if @stdin
      debug('', 'Standard IO has been restored')
      # Release the client lock
      @clientConnection.unlock
      true
    end

generateAuthKey() click to toggle source

    # File lib/taskjuggler/daemon/ProcessIntercom.rb, line 121
    def generateAuthKey
      rand(1000000000).to_s
    end

initIntercom() click to toggle source

    # File lib/taskjuggler/daemon/ProcessIntercom.rb, line 69
    def initIntercom
      # This is the authentication key that clients will need to provide to
      # execute DRb methods.
      @authKey = generateAuthKey

      # This flag will be set to true by DRb method calls to terminate the
      # process.
      @terminate = false

      # This mutex is locked while a client is connected.
      @clientConnection = Mutex.new
      # This lock protects the @timerStart
      @timeLock = Monitor.new
      # The time stamp of the last client interaction.
      @timerStart = nil
    end

restartTimer() click to toggle source

This function must be called after each client interaction to restart the client connection timer.

    # File lib/taskjuggler/daemon/ProcessIntercom.rb, line 139
    def restartTimer
      @timeLock.synchronize do
        debug('', 'Reseting client connection timer')
        @timerStart = Time.new
      end
    end

startTerminator() click to toggle source

This method starts a new thread and waits for the @terminate variable to be true. If that happens, it waits for the @clientConnection lock or forces an exit after the timeout has been reached. It shuts down the DRb server.

    # File lib/taskjuggler/daemon/ProcessIntercom.rb, line 160
    def startTerminator
      Thread.new do
        loop do
          if @terminate
            # We wait for the client to propery disconnect. In case this does
            # not happen, we'll wait for the timeout and exit anyway.
            restartTimer
            while @clientConnection.locked? && !timerExpired? do
              sleep 1
            end
            if timerExpired?
              warning('drb_timeout_shutdown',
                      'Shutting down DRb server due to timeout')
            else
              debug('', 'Shutting down the DRb server')
            end
            DRb.stop_service
            break
          else
            sleep 1
          end
        end
      end
    end

terminate() click to toggle source

    # File lib/taskjuggler/daemon/ProcessIntercom.rb, line 86
    def terminate
      debug('', 'Terminating on external request')
      @terminate = true
    end

timerExpired?() click to toggle source

Check if the client interaction timer has already expired.

    # File lib/taskjuggler/daemon/ProcessIntercom.rb, line 147
    def timerExpired?
      res = nil
      @timeLock.synchronize do
        # We should see client interaction every 2 minutes.
        res = (Time.new > @timerStart + 2 * 60)
      end
      res
    end

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