ejava.examples.asyncmarket.ejb

Class BuyerMDB

java.lang.Object

ejava.examples.asyncmarket.ejb.BuyerMDB

All Implemented Interfaces:

MessageListener

public class BuyerMDB
extends Object
implements MessageListener

This class will listen for market events and cause further bidding to occur. Note that this is mostly a technology demonstration and not a great architectural demonstration. It would be best to restrict this class to only the async/JMS interface and move all detailed processing and business logic to lower level classes. Architecturally, MDBs should be restricted to just interface adaption. If you place too much business logic here it becomes harder to test and reuse.

Field Summary

Fields

Modifier and Type	Field and Description
private AuctionItemDAO	auctionItemDAO
private AuctionMgmtLocal	auctionMgmt
private BuyerLocal	buyer
private MessageDrivenContext	ctx
private EntityManager	em
private static org.apache.commons.logging.Log	log
private OrderDAO	orderDAO

Constructor Summary

Constructors

Constructor and Description
BuyerMDB()

Method Summary

Modifier and Type	Method and Description
void	init()
void	onMessage(Message message)
protected void	processAuctionItem(long itemId)
protected void	processOrder(Order order)

Methods inherited from class java.lang.Object

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

Field Detail

log

private static final org.apache.commons.logging.Log log

buyer

private BuyerLocal buyer

auctionMgmt

private AuctionMgmtLocal auctionMgmt

em

private EntityManager em

auctionItemDAO

private AuctionItemDAO auctionItemDAO

orderDAO

private OrderDAO orderDAO

ctx

private MessageDrivenContext ctx

Constructor Detail

BuyerMDB

public BuyerMDB()

Method Detail

init

@PostConstruct
public void init()

onMessage

@PermitAll
public void onMessage(Message message)

Specified by:

onMessage in interface MessageListener

processAuctionItem

protected void processAuctionItem(long itemId)

processOrder

protected void processOrder(Order order)