HeartbeatTimer (Alluxio Core - Common Utilities 295 API)

All Superinterfaces:

Reconfigurable

All Known Implementing Classes:

ScheduledTimer, SleepingTimer
```
public interface HeartbeatTimer
extends Reconfigurable
```
An interface for heartbeat timers. The HeartbeatThread calls the tick() method.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`long`	`tick()`	Waits until next heartbeat should be executed.
`default void`	`update()`	When this object needs to be reconfigured due to external configuration change etc., this function will be invoked.

- Method Detail
  - update
```
default void update()
```
    When this object needs to be reconfigured due to external configuration change etc., this function will be invoked.
    
    Specified by:
    
    update in interface Reconfigurable
  - tick
```
long tick()
   throws java.lang.InterruptedException
```
    Waits until next heartbeat should be executed.
    
    Returns:
    
    time limit in milliseconds for this heartbeat action to run for before the next heartbeat is due.
    
    Throws:
    
    java.lang.InterruptedException - if the thread is interrupted while waiting