Ticketing_system_with_synchronized_method.java

class TicketingSystem {
  static final Ticket number1 = new Ticket("Number1", "open");
  static final Ticket number2 = new Ticket("Number2", "open");
  
  static Ticket[] numberList = new Ticket[] {number1, number2};
  
  public static synchronized String getNextAvailableTicket() {
    String availableNumber = null;
    try {
      for (Ticket number: numberList) {
        if(number.getStatus() == "open") {
          number.setStatus("pending"); // changing the state of the object
          
          System.out.printf("Thread name %s - number found %s \n",Thread.currentThread().getName(), number.getName());
          Thread.sleep(5000); // assume processing some business logic
          number.setStatus("open"); // decide to put it back due to some error
          
          availableNumber = number.getName();
          break;
        }
      }
    } catch (InterruptedException e) {
      e.printStackTrace();
    }

    return availableNumber;
  }
}