Z21HeartBeat (JMRI API)

java.lang.Object
- jmri.jmrix.roco.z21.Z21HeartBeat

All Implemented Interfaces:

java.util.EventListener, AbstractMRListener, Z21Listener
```
public class Z21HeartBeat
extends java.lang.Object
implements Z21Listener
```
Z21 specific class to send heartbeat messages to the Z21. Heartbeat messages are only required if no other messages are sent for a specific period of time, so any outgoing message should restart the timer.

Constructor Summary

Constructors
Constructor Description

Z21HeartBeat(Z21SystemConnectionMemo memo)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`dispose()`
`void`	`message(Z21Message msg)`	Member function that will be invoked by a z21Interface implementation to forward a z21 message sent to the layout.
`void`	`reply(Z21Reply msg)`	Member function that will be invoked by a z21Interface implementation to forward a z21 message from the layout.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Z21HeartBeat
```
public Z21HeartBeat(Z21SystemConnectionMemo memo)
```
- Method Detail
  - dispose
```
public void dispose()
```
  - reply
```
public void reply(Z21Reply msg)
```
    Member function that will be invoked by a z21Interface implementation to forward a z21 message from the layout.
    
    Specified by:
    
    reply in interface Z21Listener
    
    Parameters:
    
    msg - The received z21 reply. Note that this same object may be presented to multiple users. It should not be modified here.
  - message
```
public void message(Z21Message msg)
```
    Member function that will be invoked by a z21Interface implementation to forward a z21 message sent to the layout. Normally, this function will do nothing.
    
    Specified by:
    
    message in interface Z21Listener
    
    Parameters:
    
    msg - The received z21 message. Note that this same object may be presented to multiple users. It should not be modified here.