* Podporované technologie * Integrace s EJB

1. Spring framework
Motto: Musíte rozbít vejce když chcete udělat omeletu
Spring framework training materials by Roman Pichlík is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.
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2. Java EE
Kurz jak používat Java EE a nezbláznit se z toho
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3. Co Spring nabízí
• EJB
• JMS
• JNDI
• JCA
• Remoting
• Napojení na služby
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4. EJB
• Zjednoduššené vytváření EJB
• SLSB, SLFB, MDB
• AbstractStatelessSessionBean
• AbstractStatefulSessionBean
• AbstractJmsMessageDrivenBean
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5. Jak na vlastní beanu
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6. Vlastní business rozhraní
public interface ReservationService {
public boolean reserveBook(Long bookId, Date from, Date to, User user);
}
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7. Implementace
@Service(value="reservationService")
public class ReservationServiceImpl implements ReservationService {
@Autowired
private BookService bookService;
public boolean reserveBook(Long bookId, Date from, Date to, User user) {
Book book = bookService.getBook(bookId);
if(book == null) {
throw new RuntimeException("Sorry, the book doesn't exist");
}
return true;
}
}
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Spring bean, mozno testovat

8. EJB facade
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9. Vlastní fasáda
Předek, zaručující Spring EJB má stejné rozhraní
podport jako Spring beana
public class ReservationServiceEJBFacade extends
AbstractStatelessSessionBean implements ReservationService {
private static final long serialVersionUID = 1L;
private ReservationService reservationService; Získání spring
@Override beany
protected void onEjbCreate() throws CreateException {
reservationService = getBeanFactory().getBean("reservationService");
}
public boolean reserveBook(Long bookId, Date from, Date to, User user) {
return reservationService.reserveBook(bookId, from, to, user);
}
}
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-stejny business interface nam umuznuje delegovat volani

10. Home a Local Interface
import javax.ejb.CreateException;
import javax.ejb.EJBLocalHome;
public interface ReservationServiceHome extends EJBLocalHome {
public ReservationServiceLocal create() throws CreateException;
}
import javax.ejb.EJBLocalObject;
import cz.sweb.pichlik.ReservationService;
public interface ReservationServiceLocal extends EJBLocalObject, ReservationService {
}
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11. Jak se Spring startuje
<ejb-jar xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/
XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/ejb-
jar_2_1.xsd"
version="2.1" id="ejb-jar_ID">
<description>Book service EJB facade</description>
<display-name>ejbs</display-name> Určuje kontext, který se bude
<enterprise-beans> bootovat
<session>
<description>Book service EJB facade</description>
<ejb-name>ReservationServiceEJBFacade</ejb-name>
<local-home>cz.sweb.pichlik.ejb.ReservationServiceHome</local-home>
<local>cz.sweb.pichlik.ejb.ReservationServiceLocal</local>
<ejb-class>cz.sweb.pichlik.ejb.ReservationServiceEJBFacade</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>
<env-entry>
<env-entry-name>ejb/BeanFactoryPath</env-entry-name>
<env-entry-type>java.lang.String</env-entry-type>
<env-entry-value>classpath*:META-INF/businessContext.xml</env-entry-value>
</env-entry>
</session>
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- kazda instance beany si vytvari vlastni kontext.

12. JNDI
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13. Lookup generic, local&remote
<jee:jndi-lookup id="simple"
jndi-name="jdbc/MyDataSource"
cache="true"
resource-ref="true"
lookup-on-startup="false"
expected-type=""
proxy-interface="com.myapp.Foo"/>
<jee:local-slsb id="complexLocalEjb"
jndi-name="ejb/RentalServiceBean"
business-interface="com.foo.service.RentalService"
cache-home="true"
lookup-home-on-startup="true"
resource-ref="true">
<jee:remote-slsb id="complexRemoteEjb"
jndi-name="ejb/MyRemoteBean"
business-interface="com.foo.service.RentalService"
cache-home="true"
lookup-home-on-startup="true"
resource-ref="true"
home-interface="com.foo.service.RentalService"
refresh-home-on-connect-failure="true">
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14. Remoting
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15. Podporované protokoly
• Client/Server
• RMI
• Hessian/Burlap
• HttpInvoker
• JAX-RPC, JAX-WS
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16. HttpInvoker service
<servlet>
web.xml
<servlet-name>remoting</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>remoting</servlet-name>
<url-pattern>/remoting/*</url-pattern>
</servlet-mapping>
remoting-servlet.xml
<bean name="/ReservationService"
class="org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter">
<property name="service" ref="web.reservationService"/>
<property name="serviceInterface" value="cz.sweb.pichlik.ReservationService"/>
</bean>
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17. HttpInvoker client
<bean id="client.reservationService"
class="org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean">
<property name="serviceUrl" value="http://localhost:8080/servlet/remoting/ReservationService"/>
<property name="serviceInterface" value="cz.sweb.pichlik.ReservationService"/>
</bean>
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18. JMS
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19. Podporované typy
• MDB
• AbstractJmsMessageDrivenBean
• Spring MDB
• Client
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20. Mail
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21. import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.MailSender;
@Service
public class EmailExample {
@Autowired
private MailSender mailSender;
@Autowired
private SimpleMailMessage templateMessage;
public void sayHello() {
SimpleMailMessage msg = new SimpleMailMessage(this.templateMessage);
msg.setTo(order.getCustomer().getEmailAddress());
msg.setText(“HelloWorld”);
this.mailSender.send(msg);
}
}
<bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
<property name="host" value="mail.mycompany.com"/>
</bean>
<!-- this is a template message that we can pre-load with default state -->
<bean id="templateMessage" class="org.springframework.mail.SimpleMailMessage">
<property name="from" value="customerservice@mycompany.com"/>
<property name="subject" value="Your order"/>
</bean>
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org.springframework.mail.javamail.MimeMessageHelp
er