var testNLP = function() {
  counter++;
  var testString = null;
    
  switch (counter) {
    case 1 : testString = "Bill Clinton was president from 1992 to 2000.  He is not the president any more."; break;
    case 2 : testString = "Santa Claus is coming to town."; break;
    case 3 : console.log("NLP server status: ", nlpServer.getStatus().getState());
             events.publish(SERVER_AVAILABLE); 
             break;
    case 4 : nlpServer.stop(); break;
  }

  // Process the string using the NLP library and print the result.
  // Then fire another event to trigger the function again.
  if (testString) {
    nlpServer.process(testString,
      function(result) {
        console.log(JSON.stringify(JSON.parse(result), null, "  "));
        events.publish(SERVER_AVAILABLE);
      });
  }
}

nlpServer.start(function() {
  events.publish(SERVER_AVAILABLE);
});