ScrapingInterceptor.ScrapingAwareHelper (Web-Harvest Core 2.1.0 API)

java.lang.Object
- org.webharvest.ioc.ScrapingInterceptor.ScrapingAwareHelper

Enclosing class:

ScrapingInterceptor
```
public static class ScrapingInterceptor.ScrapingAwareHelper
extends Object
```
Guice aware helper class that maintains collection of registered ScrapingAware listeners. It simplifies notification of all registered listeners about updates the instances of ScrapingAware are interested in. That is when new scraping scope is created or tore down. It has almost exactly the same methods ( onBeforeScraping(Harvester) and onAfterScraping(Harvester) as those introduced by ScrapingAware. However by contrast it does not implement this interface as there is a threat it would be automatically self-registered by Guice. The instance of this object is meant to be a singleton (especially for Guice).

Since:

2.1.0-SNAPSHOT

Version:

%I%, %G%

Author:

Robert Bala

See Also:

ScrapingAware

Constructor Summary

Constructors
Constructor Description

ScrapingAwareHelper()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addListener(ScrapingAware listener)`	Register `ScrapingAware` listener.
`void`	`onAfterScraping(Harvester harvester)`	Notify all registered listeners about scraping scope that is about the end.
`void`	`onBeforeScraping(Harvester harvester)`	Notify all registered listeners about new scraping scope.

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

- Constructor Detail
  - ScrapingAwareHelper
```
public ScrapingAwareHelper()
```
- Method Detail
  - addListener
```
public void addListener(ScrapingAware listener)
```
    Register ScrapingAware listener.
    
    Parameters:
    
    listener - reference to listener object.
  - onBeforeScraping
```
public void onBeforeScraping(Harvester harvester)
```
    Notify all registered listeners about new scraping scope.
    
    Parameters:
    
    harvester - reference to the Harvester the event applies to.
  - onAfterScraping
```
public void onAfterScraping(Harvester harvester)
```
    Notify all registered listeners about scraping scope that is about the end.
    
    Parameters:
    
    harvester - reference to the Harvester the event applies to.