public void run() {
      running = true;
      while (running) {
        lock.block();

        if (!running) return;

        if (commandQueue.size() > 0) {
          console.disableEditing();
          console.consoleOutputStream.enable();

          boolean completeCommand = true;
          int completeCommandStartOffset = -1;

          do {
            Command command = commandQueue.remove(0);
            if (completeCommandStartOffset == -1)
              completeCommandStartOffset = command.commandStartOffset;
            try {
              Timing tm = new Timing();
              tm.start();
              completeCommand = console.interpreter.execute(command.command);
              long duration = tm.duration();

              if (completeCommand) {
                console.printOutput(console.interpreter.getOutput());
                if (PRINTCOMMANDTIME) {
                  console.printOutput("Time taken: " + duration + "ms.\n");
                }
                completeCommandStartOffset = -1; // Reset offset.
              } else {
                console.printOutput();
              }
            } catch (CommandExecutionException ceex) {
              console.printOutput(ceex.getMessage());
              int errorOffset = ceex.getOffset();
              int errorLength = ceex.getLength();
              if (errorOffset != -1 && errorLength != -1) {
                console.setError(completeCommandStartOffset + errorOffset, errorLength);
              }
              completeCommand = true;
            } catch (TerminationException tex) {
              // Roll over and die.
              console.terminate();
              return;
            }
          } while (commandQueue.size() > 0);

          if (!running) return;

          console.consoleOutputStream.disable();

          if (completeCommand) {
            console.emitPrompt();
          } else {
            console.emitContinuationPrompt();
          }

          console.enableEditing();
        }
      }
    }
 public void terminate() {
   running = false;
   lock.wakeUp();
 }
 public void execute() {
   lock.wakeUp();
 }