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1 J2EE EJB3.0 EoD

2 EoD J2EE

4 Container Component

5 Container Component DI Annotation

6 Container Create Passivate Component Remove Activate

8 Remote Bank.java public interface Bank extends EJBObject { public void transfertosaving(double amount) throws RemoteException, InsufficientBalanceException;... Home BankHome.java public interface BankHome extends EJBHome { public Bank create(string id) throws RemoteException, CreateException; } EJB BankBean.java public class BankBean implements SessionBean { public void transfertosaving(double amount) {...

9 EJB Home create public class BankBean implements SessionBean { public void transfertosaving(double amount) {... Remote EJB transfertosaving

10 public String sayhello() throws RemoteException {... // HelloEJB helloejb = (HelloEJB)... ;... // container.preinvoke(...); // String s = helloejb.sayhello(); // container.postinvoke(...);... return s; }

11 EJB2.1 AOP Syntax Sugar

12 AOP AOP

13 AOP Joinpoint Advice Jointpoint Pointcut Advice Jointpoint

14 AOP before Pointcut Joinpoint Advice after Joinpoint Joinpoint

15 EJB EJB2.1 CMP (Container Managed Persistency)

16 EJB2.1 CMP Abstract Home Finder EJB Deployment Descriptor SQL Syntax Sugar

17 ejb-jar.xml <query> <query-method> <method-name>ejbselectsports </method-name> <method-params> <method-param>team.localplayer </method-param> </method-params> </query-method> <ejb-ql> select distinct t.league.sport from Player p, in (p.teams) as t where p =?1 </ejb-ql> </query>

18 Entity Beans Session Beans CMP BMP

19 J2EE Alternative

Expert One-on-One J2EE Design and Development by Rod Johnson 2002/10 Implications of Using EJB Using EJB makes applications harder to test Using EJB makes

20 Expert One-on-One J2EE Design and Development by Rod Johnson 2002/10 Implications of Using EJB Using EJB makes applications harder to test Using EJB makes applications harder to deploy Using EJB with remote interfaces may hamper practicing OO design Using EJB may make simple things hard Reduced choice of application servers

Expert One-on-One J2EE Development without EJB by Rod Johnson 2004/07 J2EE at a Crossroads J2EE applications are usually too expensive to develop.

21 Expert One-on-One J2EE Development without EJB by Rod Johnson 2004/07 J2EE at a Crossroads J2EE applications are usually too expensive to develop. J2EE has significant issues with ease of development. J2EE applications tend to be unnecessarily complex. There is a growing movement in the J2EE community toward simpler solutions and less use of EJB.

Inversion of Control Containers and the Dependency Injection pattern Martin Fowler 2004/01 One of the entertaining things about the enterprise Java world is the huge amount of activity in building

22 Inversion of Control Containers and the Dependency Injection pattern Martin Fowler 2004/01 One of the entertaining things about the enterprise Java world is the huge amount of activity in building alternatives to the mainstream J2EE technologies, much of it happening in open source. Much of this is a reaction to the heavyweight complexity of much in the mainstream J2EE world, but much of it is also exploring alternatives and coming up with creative ideas.

23 J2EE Alternative Spring O/R Hibernate AOP JBoss

24 EJB2.1 Container Component

25 EJB3.0 Container Context Component Inverse of Control Dependency Injection

26 EJB3.0 DI Annotaion on Setter public void setgreeting(string greeting){ } _greeting = greeting; <ejb-server jndi-name="java:comp/env/ejb"> <bean type="qa.testbean"> <init greeting="hello, World from web.xml"/> </bean> </ejb-server> Resin configuration-file

27 J2EE5.0

28 J2EE5.0 J2EE Ease of Development Ease of Development Ease of Development Ease of Development Ease of Development...

29 J2EE5.0 J2EE5.0 = JSF1.0 + EJB3.0 ( + JSTL1.1 + JSP2.1 + JAXB2.0 + JAX-RPC2.0 ) J2EE5.0 EoD = GUI J2EE Annotation

30 EJB3.0 Annotation Configuration by exception Dependency injection mechanisms POJO / POJI Elimination of Home interface Simplified CMP...

31 EJB3.0 Home Local Remote create remove find select Deployment descriptor

32 Entity Beans

33 courses id 1 course Java teacher 2 XML 3 SQL

34 courses SQL CREATE TABLE courses ( id INTEGER PRIMARY KEY auto_increment, course VARCHAR(250), teacher VARCHAR(250) ); INSERT INTO courses VALUES( Java, ); INSERT INTO courses VALUES( XML, ); INSERT INTO courses VALUES( SQL, );

35 courses EntityBean EntityBean courses id course teacher

36 courses name="course generator=javax.ejb.generatortype. AUTO

37 EJB3.0 CourseBean.java (name="courses ) public class CourseBean { private int _id; private String _course; private String ( generator=generatortype.auto ) (name="id") public int getid() { return _id; } public void setid(int id) { _id = id; } courses id

38 EJB3.0 CourseBean.java public String getcourse() { return _course; } public void setcourse(string course) { _course = course; public String getteacher() { return _teacher; } public void setteacher(string teacher) { _teacher = teacher; } course teacher

39 EJB3.0 find

40 Java XML

41 EJB3.0?

42 Many-to-One

43 Seminar seminar_id name

44 EJB3.0 Seminar.java

45 Student student_id name id seminar_id

46 EJB3.0 Student.java

47 EJB3.0

49 EJB3.0

51 Many-to-Many

52 Student Course 1 1 J2EE 2 m : n 2 Jini 3 3 P2P/JXTA 4 4 SOAP 5 student_course_map m : 1 n :

53 Course.java

54 Student.java

56 J2EE Jini Jini P2P/JXTA P2P/JXTA SOAP

57 Annotation

58 JSR Web Services Metadata for Java name= ExampleWebService, RPC/literal targetnamespace= ExampleWebService style=soapbinding.style.rpc, use=soapbinding.use.literal) public class ExampleWebServiceImpl action= urn:login name= Token ) public LoginToken name= UserName ) String name= Password ) String password) { //... } //... }

59 BottomUp Java WSDL. <message name="login"> <part name="username" type="s:string"/> <part name= Password type= s:string /> </message> <message name="loginresponse"> <part name="token" type="logintoken"/> </message> <porttype name="examplewebservice"> <operation name= login > <input message= tns:login /> <output message= tns:loginresponse @WebMethod

60 Annotation JSR181) Java WSDL Java annotation WSDL

61 JSR Enterprise JavaBeans 3.0 public class ( name="student_id ) public long public String targetentity="course ( table=@javax.ejb.table (name="student_course_map"), joincolumns=@javax.ejb.joincolumn (name="student_id")", inversejoincolumns=@javax.ejb.joincolumn (name="course_id") ) public Collection getcourses() }

62 @javax.ejb.associationtable

63 Annotation JSR220) Java Java annotation

64 JSR The Java Architecture for XML Binding (JAXB) 2.0 public class Trade String getsymbol(); void int getquantity(); void setquantity(int); } <xsd:complextype name="trade"> <xsd:sequence> <xsd:attribute name="symbol" type ="xsd:string"/> <xsd:element name="quantity" type ="xsd:int"/> </sequence> </xsd:complextype>

65 Annotation JSR222) Java XML Document Java annotation XML Document

66 Annotation Java Entity Java annotation Entity Annotation = Semantic Sugar

67 Annotation Program Annotation POJO Meta Annotation Annotation Program

68 Annotation Annotation Annotation Annotation Annotation

PowerPoint プレゼンテーション

PowerPoint プレゼンテーション Java J2EE Spring Spring Dependency Injection AOP Java J2EE 2 4 Application Java Enterprise API 5 6 mod_jk2 AJP13 Coyote/JK2 Connector Session Apache2 Tomcat5-a AJP13 Coyote/JK2 Connector Session Tomcat5-b