com.neurosys.ecom.cart.service

Class CartUpdateStockChangeListener<P extends Product>

java.lang.Object

com.neurosys.ecom.cart.service.CartUpdateStockChangeListener<P>

All Implemented Interfaces:

ChangeListener<Object>, Serializable, EventListener

public class CartUpdateStockChangeListener<P extends Product>
extends Object
implements ChangeListener<Object>

A Listener that can be plugged into CartService; that ensures SaleStrategy locks products selected by a user for the CartService.CART_TYPE_SHOPPING so that other users may not purchase the same product that is in the shoppers cart.
Expects - Object[]{String cartType, Cart, sessionId as String} as the param
The locking mechanism is based purely on sessionId. So multiple users in different instances will be part of different locks.

Author:

Arjun Dhar

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
CartUpdateStockChangeListener(SaleStrategy saleStrategy)

Method Summary

Modifier and Type	Method and Description
void	onChange(ChangeGenerator<Object> cartService, Object param)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CartUpdateStockChangeListener

public CartUpdateStockChangeListener(SaleStrategy saleStrategy)

Method Detail

onChange

public void onChange(ChangeGenerator<Object> cartService,
                     Object param)

Specified by:

onChange in interface ChangeListener<Object>

Parameters:

cartService - as the generator that caused the change. Specially useful if the Listener is subscribing to multiple ChangeGenerators

param - as the model change communicated