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AccountBean class, 236 EntityBeanProtocol interface, 241 EJBResolver aspect business tier improvements using AOP, 251 description, 258 EJBs Account EJB, 233 239 AOP advantages for business tier, 227 entity EJBs, 213 214 implementation of session facade pattern, 232 POJO implementation, 215 sample application business tier overview, 206 ejbStore method AccountBean class, 236 EntityBeanProtocol interface, 241 empty methods, 246 endTx method, 268 entity EJBs J2EE design patterns, 233 EntityBean interface implementing business object pattern, 239, 240 EntityBeanProtocol interface, 240 error handling benefits of implementing contracts, 172 EventHandle class ApplicationClient project, 218 exception handler creating pointcuts, JAC, 68 exception handlers application internationalization, 293 chaining, 81 introduction feature, JAC, 80 81 exception joinpoint type comparing AOP tools, 141 exceptions advice code, AspectJ, 46 introduction mechanism, AspectJ, 48 joinpoint types, 15 executedTx method resolving object references, 250 TxControllerBean class, 230 execution joinpoint joinpoint types, AspectJ, 36, 42 execution keyword, JBoss AOP JBoss pointcuts, 92 method- and constructor-execution pointcuts, 97 explicit ordering aspect ordering, AspectJ, 51 expr parameter AnnotationIntroductionDef annotation, JBoss APO, 111 extendability

/** * @ejb.create-method */ public void ejbCreate( String id ) { setID( id ); } /**

public FlushModeType getFlushMode(); public void refresh(Object entity);

public Query createQuery(String jpqlString); public Query createNamedQuery(String name); public Query createNativeQuery(String sqlString); public Query createNativeQuery(String sqlString, Class result Class); public Query createNativeQuery(String sqlString, String resultSetMapping); public void close();

* @ejb.interface-method * @ejb.persistence * @ejb.pk-field */ public abstract String getID(); /** * @ejb.interface-method */ public abstract String getType(); /** * @ejb.interface-method */ public abstract String setType(); }

Closes an application-managed EntityManager. Checks whether an EntityManager is open. Retrieves a transaction object that can be used to manually start or end a transaction. Asks an EntityManager to join an existing JTA transaction.

OOP (object-oriented programming), 3 extensions acc (.acc) extension, 75 jac (.jac) extension, 78

public boolean isOpen();

public EntityTransaction getTransaction(); public void joinTransaction();

In addition, you need to add the subtask <valueobject/> to your build.xml file in order for XDoclet to know it should generate the new class.

messaging. Among other things, this tends to promote loose coupling between systems. In our example, the Turtle server would know about the format of the XML message and not the ShippingRequest object itself. The problem is that XML tends to bloat the size of the message, significantly degrading MOM performance. In certain circumstances, it might even be the right choice to use binary streams in the message payload, which puts the least amount of demand on MOM processing as well as memory consumption. Be wary of poison messages. Imagine that a message is handed to you that your MDB was not able to consume. Using our example, let s assume that we receive a message that s not an ObjectMessage. As you can see from this code snippet, if this happens the cast in onMessage will throw a java.lang.ClassCastException:

factory class, JBoss AOP instantiating an aspect, 109 Factory design pattern aspects and, 170 field pointcuts, JBoss AOP, 97 field read/write joinpoint types comparing AOP tools, 141 FieldInvocation class joinpoint introspection, JBoss AOP, 102 FileSaver class implementing Command pattern with AspectJ, 163 filter object pattern using AOP in web presentation tier, 308 filtering declarative configuration of filters, 306 joinpoints, AspectJ, 39 filtering operators joinpoints, AspectJ, 38 40 findByCustomerId method resolving object references, 247 findByPrimaryKey method resolving object references, 247 Fleury, Marc, 91 framework approach comparing AOP tools, 137, 146 frameworks Spring Framework, 113 120 front controller pattern using AOP in web presentation tier, 298 302 FrontController class, 299 aspectized implementation of, 301 function coverage analysis, 181 functional requirements business concerns, 10 functional tests, 180

try { ObjectMessage objectMessage = (ObjectMessage)message; ShippingRequest shippingRequest = (ShippingRequest)objectMessage.getObject(); processShippingRequest(shippingRequest); } catch (JMSException jmse) { jmse.printStackTrace(); context.setRollBackOnly(); }

Listing 2.9 contains the generated value object class (including comments), reformatted for this chapter.