Pollable

All Known Implementing Classes:

CTAPICardTerminal, CTAPICardTerminalFactory, CTAPIWithKeyboardCardTerminal, SmartCardIOFactory, SmartCardIOTerminal
```
public interface Pollable
```
This interface must be implemented by implementations of CardTerminal if they do not generate events when a card is inserted in or removed from the card terminal.

Author:

Peter Trommler (trp@zurich.ibm.com), Mike Wendler (mwendler@de.ibm.com)

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  void poll()
  Checks the status of the underlying terminal device.

- Method Detail
  - poll
```
void poll()
   throws CardTerminalException
```
    Checks the status of the underlying terminal device. Must generate a CardTerminalEvent if a card is being inserted or removed by calling CardTerminal.cardInserted() or CardTerminal.cardRemoved(). Alternatively the terminal could perform status checks itsself, e.g. by handling interrupts. Implementation Note: the CardTerminalRegistry calls this method of all registered Pollable terminals periodically. So the implementation of this method should not carry out lengthy operations but return as quickly as possible.
    
    Throws:
    
    CardTerminalException - Thrown when error occurred in poll-mechanism.