Spring J2EE

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* Podporované technologie
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  • 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.Sunday 13 May 2012 1
  • 2. Java EE Kurz jak používat Java EE a nezbláznit se z tohoSunday 13 May 2012 2
  • 3. Co Spring nabízí • EJB • JMS • JNDI • JCA • Remoting • Napojení na službySunday 13 May 2012 3
  • 4. EJB • Zjednoduššené vytváření EJB • SLSB, SLFB, MDB • AbstractStatelessSessionBean • AbstractStatefulSessionBean • AbstractJmsMessageDrivenBeanSunday 13 May 2012 4
  • 5. Jak na vlastní beanuSunday 13 May 2012 5
  • 6. Vlastní business rozhraní public interface ReservationService { public boolean reserveBook(Long bookId, Date from, Date to, User user); }Sunday 13 May 2012 6
  • 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 doesnt exist"); } return true; } }Sunday 13 May 2012 7Spring bean, mozno testovat
  • 8. EJB facadeSunday 13 May 2012 8
  • 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); } }Sunday 13 May 2012 9-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 { }Sunday 13 May 2012 10
  • 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>Sunday 13 May 2012 11- kazda instance beany si vytvari vlastni kontext.
  • 12. JNDISunday 13 May 2012 12
  • 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">Sunday 13 May 2012 13
  • 14. RemotingSunday 13 May 2012 14
  • 15. Podporované protokoly • Client/Server • RMI • Hessian/Burlap • HttpInvoker • JAX-RPC, JAX-WSSunday 13 May 2012 15
  • 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>Sunday 13 May 2012 16
  • 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>Sunday 13 May 2012 17
  • 18. JMSSunday 13 May 2012 18
  • 19. Podporované typy • MDB • AbstractJmsMessageDrivenBean • Spring MDB • ClientSunday 13 May 2012 19
  • 20. MailSunday 13 May 2012 20
  • 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>Sunday 13 May 2012 21org.springframework.mail.javamail.MimeMessageHelper