2. 2 목차 n WebLogic Architecture n J2EE Spec PreView n WebLogic Basic n Weblogic JDBC n Weblogic JNDI n Weblogic EJB Architecture n Weblogic EJB Deployment n Weblogic EJB Transaction n Weblogic Servlet n Weblogic JSP

3. 3 RDBMS ODBMS BEA Web Logic Architecture BEA WebLogic WebLogic as Web Server WebLogic as Application Server

4. 4 RDBMS ODBMS BEA Web Logic Architecture BEA 웹로직 Directory Server Transaction Manager (Tuxedo) Web Server NSAPI, ISAPI 플러그인기능 C/C++ CORBA (M3,IONA,VISIBROKER 등 ) COM Socket JSP Servlets EJB HTTP HTTPS TCP/IP SSL RMI IIOP COM Events JNI JTS JDBC COM CORBA JNDI HTTP 관리콘솔 htmlKona RMI JOLT JOLT 서버 JMS Timing

5. 5 J2EE Architecture J2SE Applet client Applet container Application colient Application container J2SE JMSJMS JNDIJNDI RMIIIOPRMIIIOP JDBCJDBC Web Container JSP Servlet J2SE EJB Container JMSJMS JNDIJNDI JTAJTA J A V A Mail RMIRMI J2SE EJB DBMS JMSJMS JNDIJNDI JTAJTA J A V A Mail RMIRMI JDBCJDBC JDBCJDBC

6. 6 J2EE Architecture n Java Platform for the Enterprise (JPE) l Java Naming and Directory Service (JNDI) l Java Database Connectivity (JDBC) l Remote Method Invocation (RMI) l Enterprise Java Beans (EJB) l Java Transaction Service (JTS) l Java Transaction Architecture(JTA) l Servlets /JHTML l Java Server Page (JSP) l Java Interface Definition Language(Java IDL) l Java Mail l JavaBeans Activation Framework(JAF) l Java Message Service(JMS) l Extended Markup Language(XML)

7. 7 J2EE Architecture n JNDI(Java Naming and Directory Service) Application Code JNDI API Naming Manager JNDI Server Provider Interface LDAP Driver File System Driver DNS Driver Other LDAP Server File System DNS Server Other

8. 8 J2EE Architecture n JDBC(Java Database Connectivity) DB API JDBC Driver JDBC API Application Code DBMS Type 1~Type 4

9. 9 Transport Layer Remote Reference Layer J2EE Architecture n RMI (Remote Method Invocation) Skeleton Class Stub Classes Client Application Remote Object

10. 10 J2EE Architecture n EJB(Enterprise Java Beans) Application Sever(Container) DBMS EJB

11. 11 J2EE Architecture n JTS (Java Transaction Service) l CORBA Transaction Service 기반 l JTS defines the Interface between Application / Transaction Manger Application Server / Transaction Manager Resource Manager / Transaction Manager Transaction Manger /CRM

12. 12 J2EE Architecture n JTA (Java Transaction Architecture) Transaction Monitor Implementation JAVA Transaction API EJB JDBC JMS

13. 13 J2EE Architecture n Java Servlets  provide request/response service  can be invoked by HTTP commnads  are deployed on web servers  look like web pages to client browsers  can strore client data in a local session Servlet WebServer DataBase

14. 14 J2EE Architecture n JSP(Java Server Pages)  are text-based, editable types of servlets  are converted and executed as a servlet by webserver  employ special tags to hold Java code JSP WebServer DataBase

15. 15 J2EE Architecture n Java IDL (Java Interface Definition Language)  is used to integrete Java & CORBA  Language Independent interface  Is the basis for CORBA stubs & skeletons n JAVA Mail  is a Java API for accessing mail server  available for SMTP & IMAP n JAF  Integrate support for MIME data type into the Java platform  is used JavaMail n JMS  Java API for accessing message oriented middleware n XML

16. 16 Weblogic Basic n Application Server Configuration Fire Wall Client Application Client Application WWW Internet Internal Network Local Client Application Fire Wall Application server DBMS

17. 17 Weblogic Basic n Application Server Configuration Client Application WWW Internet Internal Network Application server DBMS Application server Application server Proxy server

18. 18 Weblogic Basic n Application Server Configuration Client Application WebLogic Server Message Queue Web Client Thread Pool Deployed Application

19. 19 Weblogic Basic n Directory Structure [root directory] weblogic bin classes lib myserver examples license

20. 20 Weblogic JDBC RDBMS Client Java Application JDBC API JDBC-ODBC Bridge JDBC-Native Bridge JDBC-Net Bridge All JDBC Driver ODBC Driver Native API (C, C++) NetWork Server (Type 1) (Type 2) (Type 3) (Type 4)

21. 21 Weblogic JDBC Client Java Application JDBC API JDBC-ODBCBridge ODBC Driver Server DBMS n Type 1 Driver JDBC-ODBC Bridge 사용 Client 에 ODBC Driver 필요 Sun Mycrosystems 에서만 배포

22. 22 Weblogic JDBC Client Java Application JDBC API JDBC-Native Bridge Native Driver Server DBMS n Type 2 Driver DBMS Native Driver 필요 각 Client 에 Native Driver 배포 JDBC Driver 가 client 요청을 Native API 로 변경해서 호출

23. 23 Weblogic JDBC Client Java Application JDBC API JDBC-Net Driver Network Server DBMS n Type 3 Driver DBMS Native Driver 필요 각 Client 에 Native Driver 배포 JDBC Driver 가 client 요청을 Native API 로 변경해서 호출 DBMS

24. 24 Weblogic JDBC Client Java Application JDBC API JDBC Driver n Type 4 Driver Pure Java 를 이용한 JDBC Driver 각 Client 에서는 Client side configuration 이 필요 없음 DBMS

25. 25 Weblogic JDBC n WebLogic Connection Pools Setting up connections at server startup dynamic growth/shrinkage of the pools DBMS RS/6 000 IB M WebLogic Server Client Connection Pool

26. 26 Weblogic JNDI n WebLogic JNDI Structure Application Code JNDI API Naming Manager JNDI Server Provider Interface LDAP File System DNS RMI NIS CORBA

27. 27 Weblogic JNDI n WebLogic JNDI Tree Initial context 다른 context 와 연결된 Context 다른 두개의 context 와 연결된 하나의 객체 Binding 은 logical name 과 context 를 가진 객체 간의 연결을 의미한다.

28. 28 Weblogic EJB Architecture n EJB(Enterprise JavaBeans) Application Architecture Dynamic HTML DBMS Java Applet Java Client Web Server JSP/Servlet Application Server IIOP/RMI HTTP Transaction,security, naming service

29. 29 Weblogic EJB Architecture n EJB Design Architecture 3 basic design approach for building EJB  Stateless server approach  Session-oriented approach  Persistent object approach EJB specification  Stateless session bean  Stateful session bean  Entity bean

30. 30 Weblogic EJB Architecture(Session) n Stateless Session EJB  Client 의 상태 정보를 저장하고 있지 않음  EJB server 가 Fail 났을 경우 EJB 내의 정보도 삭제  하나의 session bean 에서 생성된 두 instance 는 상호 독립적 n Stateful Session EJB  Client 와 EJB 는 conversational 모델  Client 의 상태 정보를 저장  EJB server 가 Fail 났을 경우 EJB 내의 정보도 삭제  각 Instance 는 Single Thread 사용

31. 31 Weblogic EJB Architecture (Session) n Stateless VS Stateful Session EJB client

32. 32 Weblogic EJB Architecture(Entity) n Entity EJB  영구적인 데이터를 참조  EJB server 가 Fail 이 되어도 데이터는 보존됨  Multiple client 는 동일한 데이터를 참조할 수 있음  EJB instance 는 데이터 저장소의 데이터를 참조

33. 33 Weblogic EJB Architecture (Entity) n Shared Entity EJBs client Persistent store

34. 34 Weblogic EJB Architecture (Entity) n Type of Persistence client Persistent store  CMP (Container-Managed Persistence)  BMP (Bean-Managed Persistence) CMP BMP

35. 35 Weblogic EJB Architecture n WebLogic Pooling/Passivation client Free Pool Cache Passivated Objects

36. 36 Weblogic EJB Architecture n EJB Interface Home Interface  EJB 생성  EJB 삭제  EJB Meta 정보를 저장  EJB Clients 가 공유  Weblogic Startup 시 JNDI 에서 Stub 정보를 포함 Remote Interface  EJB 의 business logic 정보를 저장

37. 37 Weblogic EJB Architecture n EJB Processing Client

38. 38 Weblogic EJB Deployment n EJB Deployment EJB Class File Jar utility META-INF\ejb-jar.xml Com.beans.MyBean.class Com.beans.MyBeanHome.class Com.beans.MyBeanBean.class Com.beans.MyPK.class ejb-jar.xml Weblogic-ejb-jar.xml naked jar file weblogic ejbc compiler Deployable jar file

39. 39 Weblogic EJB Deployment n XML ejb-jar.xml weblogic-ejb-jar.xml weblogic-rdbms-jar.xml <!DOCTYPE weblogic-rdbms-bean PUBLIC '-//BEA Systems, Inc.//DTD WebLogic 5.1.0 EJB RDBMS Persistence//EN' 'http://www.bea.com/servers/wls510/dtd/weblogic-rdbms-persistence.dtd'>

40. 40 Weblogic EJB Transaction n Transaction Interactions  dirty reads – the reading of uncommitted chages  Non-repeatable reads – the reading of uncommitted and then changed data  phantom reads – the reading of new rows for the same where clause

41. 41 Weblogic EJB Transaction n EJB Transaction Attributes  TX_NOT_SUPPORTED  TX_SUPPORTS  TX_MANDATORY  TX_REQUIRED  TX_REQUIRED_NEW  TX_BEAN_MANAGED

42. 42 Weblogic EJB Transaction n TX_NOT_SUPPORTED 1-begin 2-method 3-commit Container EJB Client

43. 43 Weblogic EJB Transaction n TX_SUPPORTS 1-begin 2-method 3-commit Container EJB Client

44. 44 Weblogic EJB Transaction n TX_MANDATORY 1-begin 2-method 3-commit Container EJB Client TransactionRequired Exception

45. 45 Weblogic EJB Transaction n TX_REQUIRED 1-begin 2-method 3-commit Container EJB Client 1-begin 2-method 3-commit

46. 46 Weblogic EJB Transaction n TX_REQUIRES_NEW 1-begin 2-method 3-commit Container EJB Client 1-begin 2-method 3-commit 1-begin 2-method 3-commit

47. 47 Weblogic EJB Transaction n TX_BEAN_MANAGED 1-begin 2-method 3-commit Container EJB Client 1-begin 2-method 3-commit 1-begin 2-method 3-commit

48. 48 Weblogic EJB Transaction n TRANSACTION_READ_UNCOMMITTED allow dirty reads allow phantom reads allow non-repeatable reads n TRANSACTION_READ_COMMITTED prevents dirty reads allow phantom reads allow non-repeatable reads

49. 49 Weblogic EJB Transaction n TRANSACTION_REPETABLE_READ prevents dirty reads prevents phantom reads allow non-repeatable reads n TRANSACTION_SERIALIZABLE prevents dirty reads prevents phantom reads prevents non-repeatable reads

50. 50 Weblogic Servlets Servlet 지원 n 웹로직 서버에서 제공하는 HTTP Servlets l Session tracking l Database access l Multihoming l Configuration and management l Security l Logging and report generation l Integrated services

51. 51 Weblogic Servlets Servlet Access Model n Model #1 RDBMS ODBMS EJB BEA 웹로직 Servlets Req Res JDBC RMI HTTP

52. 52 Weblogic Servlets Servlet Access Model n Model #2 RDBMS ODBMS EJB BEA 웹로직 Servlets Req Res JDBC RMI Servlets Requester/Browser HTTP

53. 53 n 서블릿은 concurrent 요청에 대해 다중 핸들이 가능해야 한다. Weblogic Servlets Multithreading Client Program Execute Thread Servlet Instance Web Server / Servlet Engine

54. 54 n singleThreadModel 인터페이스 구현시 구조 Weblogic Servlets SingleThreading Client Program Execute Thread Servlet Instance Web Server / Servlet Engine Block and wait for first thread to complete Each request gets its own instance

55. 55 n 브라우저에 웹 서버의 정보들을 저장 n 브라우저에 의해 삭제 n 보안상 위험성 있음 Weblogic Servlets Cookie

56. 56 Weblogic Servlets Cookie RS/6 000 Web Server URL : http://www.daou.co.kr/index.html Browser Client Cookie persistently stored on the browser

57. 57 n Session Sharing Weblogic Servlets Session Servlet Client1 Session Web Server / Servlet Engine Client2 Session Client2 Client1

58. 58 Weblogic Servlets Interservlet Communication n Servlet Forwarding RDBMS ODBMS EJB BEA 웹로직 Servlets Req Res JDBC RMI Servlets Requester/Browser HTTP

59. 59 Weblogic Servlets Interservlet Communication n Servlet Including RDBMS ODBMS EJB BEA 웹로직 Servlets Req JDBC RMI Servlets Requester/Browser HTTP Res

60. 60 Weblogic JSP What is a JSP? n Servlet 에 비해 JSP 의 장점 l Write once, run anywhere l IDE 들과 통합가능 (dreamweaver…) l 사용자가 tag 확장가능 l 디자인과 로직 분리

61. 61 Weblogic JSP JSP Translation Process JSP (text document) Output Servlet (.java) Servlet (.class) Translated Compiled Loaded/executed No changes since last translation

62. 62 Weblogic Servlets Programming Model n Simple Model RDBMS ODBMS EJB BEA 웹로직 JSP Req Res JDBC RMI HTTP

63. 63 Weblogic Servlets Programming Model n Forwarding Delegation Model RDBMS ODBMS EJB BEA 웹로직 JSP Req Res JDBC RMI JSP Requester/Browser HTTP Res JSP Req Res Req Done via forward action

64. 64 Weblogic Servlets Programming Model n Forwarding Delegation Model RDBMS ODBMS EJB BEA 웹로직 JSP Req Res JDBC RMI JSP Requester/Browser HTTP JSP Done via forward action out