The document discusses various features of the Spring framework including EJB support, creating custom beans, JNDI lookup, remoting, JMS, and mail support. Spring can simplify creation of EJB session and message-driven beans. Custom beans can implement interfaces to define business logic. Spring supports lookup of resources through JNDI and exposing services via remoting protocols like RMI, HTTP invoker, and JMS. It also provides utilities for sending mail.

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