IndexerListener (pdl API)

All Superinterfaces:

Configurable

All Known Implementing Classes:

DefaultIndexerListener, ExtentIndexerListener, ExternalIndexerListener, ExternalPreferredListener, ReliableIndexerListener
```
public interface IndexerListener
extends Configurable
```
Listen for notifications that the index has changed.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`int`	`getMaxTries()`	An indexer that generates a IndexerEvent will attempt to deliver the event at most this many times, if the listener throws an Exception while processing.
`long`	`getTimeout()`	A IndexerListener has this many milliseconds to process an event before being interrupted.
`void`	`onIndexerEvent(IndexerEvent change)`	This method is called when the indexer makes a change to the ProductIndex.

Methods inherited from interface gov.usgs.util.Configurable
configure, getName, setName, shutdown, startup

- Method Detail
  - onIndexerEvent
```
void onIndexerEvent(IndexerEvent change)
             throws java.lang.Exception
```
    This method is called when the indexer makes a change to the ProductIndex.
    
    Parameters:
    
    change - description of the change.
    
    Throws:
    
    java.lang.Exception - if error occurs
  - getMaxTries
```
int getMaxTries()
```
    An indexer that generates a IndexerEvent will attempt to deliver the event at most this many times, if the listener throws an Exception while processing.
    
    Returns:
    
    A value of less than one means never attempt to deliver.
  - getTimeout
```
long getTimeout()
```
    A IndexerListener has this many milliseconds to process an event before being interrupted.
    
    Returns:
    
    number of milliseconds before timing out. A value of 0 or less means never time out.