1. 정 재 웅 선임연구원 jwchung@sslab.kaist.ac.kr
JEUS 2.0 소개
정 재 웅 선임연구원

2. JEUS 2.0
2001년 4월 25일
정 재 웅 선임연구원

3. Contents JEUS Architecture WebtoB web server Servlet/JSP container
EJB container
JTS
JMS
JNDI
Security
GUI-aided Configuration
Multi-node Management
GUI-aided Node Management
JEUS Roadmap
JEUS 2.0

4. System Architecture of JEUS
Naming Server
JDBC
Connection
Pooling
Clients
Database
HTML
HTTP
JSP Engine
EJB bean
EJB
Container
WebtoB
Adaptation Layer
Servlet TP
Monitor
(Tmax)
HTTP
JTA
Applet
Context
RMI/
IIOP
Context Group
EJB
Server
Servlet Engine
Directory
Server
JNDI
RMI/
IIOP
Client
Application
(Java,CORBA)
Other
ORB
JEUS Server
IIOP
Node Controller
Link Manager
Multi – Node System
JEUS 2.0

5. Structure of WebtoB WebtoB CGI Web Client PHP Handler Internet TCP/IP
Web Service
HTTP
Client
CGI
HTTP
Internet
TCP/IP
Client
Web Client
Handler
PHP
HTML
Client
Web Client
Listener
Web Client
Handler
HTTP
Servlet
HTTP
Web Client
Handler
Client
JSP
HTTP
Client
JEUS 2.0

6. JEUS Servlet Engine Load Balancing & Fail-over
Intelligent Thread Pooling
Powerful Administration
DB Connection Pooling
Session Management
JEUS 2.0

7. Load Balancing & Failover
Servlet
Engine
Handler
Handler
Node 1
response
Listener
thread
Handler
Requests
Web
Server
Thread Pool
Servlet
Engine
Servlet
Engine
Servlet
Engine
Node 2
JEUS 2.0

8. Engine Control Command
Powerful Administration
Suspend
Restart
Terminate
Reload
Update parameters
Engine Control Command
Administrator
Node
Servlet
Container
Manager
Context
State Information
Thread Pool Info.
Request Info.
System load
Context
Group
Servlet
Context
Servlet Engine
JEUS 2.0

9. DB Connection Pooling Servlet Engine Servlet Servlet
Administrator
Node
Servlet
Servlet
Oracle
Database
DB Connection Pool
Manager
Informix
Database
Servlet Engine
JEUS 2.0

10. Session Management - Application 단위의 세션관리 - 컨텍스트 그룹 단위의 세션관리
* 각 Web Application 단위인 컨텍스트 단위로 세션관리
- 컨텍스트 그룹 단위의 세션관리
* 컨텍스트 그룹내의 컨텍스트간의 세션 공유지원
- Session Clustering
* 로드밸런싱, 장애대책을 위하여 여러 웹 컨테이너들을 클러스터링 * 클러스터링된 컨테이너들 사이의 세션 객체 공유
JEUS 2.0

11. EJB Server for Business Modules
Enterprise JavaBeans
Specification for java-based distributed object computing
Naming Server
Registration
lookup
EJB
home
EJB
home
EJB Container
EJB Container
EJB bean
EJB bean
clients
EJB remote
EJB remote
EJB remote
EJB bean
EJB remote
EJB bean
Method
invocation
EJB Server
JEUS 2.0

12. Object Management Client request Auto Removal By A.R. timeout
Passivation
By P. timeout
Removed
bean
JEUS
File DB
Passivated
bean
Session bean
DataBase
Active
bean
Entity bean
EJB bean
Session
Pool
Bean & Context
Pool
EJB context
EJB remote
JEUS 2.0

13. Communication Protocol
JNDI
Class FTP
Server
JRMP
IIOP
CosNaming
RMI registry
Thread
Pool
RMI client
Skeleton
Stub
EJB
home
EJB Container
Tie
RMI Runtime
Skeleton
EJB bean
CORBA client
EJB remote
Tie
Stub
Server-size
ORB
EJB Server
Client-side ORB
JEUS 2.0

14. Transaction Service Bean-Managed Transaction
* UserTransaction Interface
Container-Managed Transaction
* Deploy 파일에 트랜잭션 특성을 선언하여 컨테이너가 트랜잭션 처리
* NotSupported, Required, Supports, RequiredNew, Mandatory, Naver
Client-Managed Transaction
* 빈의 서비스를 이용하는 클라이언트에서 트랜잭션 처리 …
InitialContext ctx = new InitialContext();
User Transaction ut = (UserTransaction) ctx.lookup(“jeus_UserTransaction”);
JEUS 2.0

15. Security Service Security Context Propagation
Programmatic Security Service
javax.ejb.EJBContext.getCallerPrincipal()
javax.ejb.EJBContext.isCallerInRole()
Declarative Security Service …
<assembly-descriptor>
<security-role>
<description/>
<role-name>ROLENAME</role-name>
</security-role>
<method-permission>
<method>
<ejb-name>EJBNAME</ejb-name>
<method-name>*</method-name>
</method>
<method-params/>
</method-permission> ….
JEUS 2.0

16. Other Functionality Runtime Service Control
Suspend, Resume, Undeployment
Runtime Service Modification
Reload for parameter tuning or class modification
Easy to deploy beans
Module-level deployment
Full-deployment, Fast-deployment, Pre-deployment
DB Connection sharing
Serialization of SQL requests
Engine Architecture option
EXCLUSIVE_ACCESS, SINGLE_OBJECT, MULTIPLE_OBJECT
SQL control option
JEUS 2.0

17. JTS(Java Transaction Service)
JTA(Java Transaction API)
UserTransaction, TransactionManager, Transaction, Synchronization, XAResource, XID interface
XAConnection
Pool
XADataSource
(JDBC Driver)
Application Program
Connection
Containers
Transaction
TransactionManager
Transaction
TransactionManager
UserTransaction
Synchronization XAResource
JTA Mapper between JEUS Transaction Manager and Application Server
Communication Manager (RMI or IIOP)
JEUS Transaction
Manager
Transaction Context Propagation
< JEUS Transaction System >
JEUS 2.0

18. JMS (Java Message Service)
Interfaces that define how a JMS client accesses Enterprise Message System
Application A
Application A DB
Persistent data
JMS API
JMS API
JEUS JMS Server
JEUS JMS runtime
message
JEUS JMS runtime
message
JEUS 2.0

19. JNDI(Java Naming & Directory Interface)
JNDI (Java Naming & Directory Interface) Support
Specialized Naming Service in Multi-node Environment
Replicating into Clusters
Auto-Initialing at Joining into Clusters
Caching into JVMs
Connection Management
Replicated
Not Replicated
Local
Naming Server
Naming Server
JVM
JVM
SPI
SPI
SPI
SPI
Client
Client
Client
Client
Clusters
Local Node
JEUS 2.0

20. Resource Access Control
Security Manager
Web Security
SSL support for Web client
EJB, Servlet Security API support
Multi-node Security Management
Realm management
Resource Access Control
JEUS Security Manager
Realm Control
Resource Access Control
Realm
User
Group
RoleMap
Role
RoleRef
Resource
ACL
Resource
ACL
Resource
ACL
JEUS 2.0

21. GUI-aided Configuration
JEUS 2.0

22. GUI-aided Node Management
JEUS 2.0

23. Multi-node Management
Fault tolerance
Engine fail-over by JEUS Server
Multi-node monitoring network based on ‘Ring’ topology
Node fail-over by initiation of backup engines
Auto-rejoining at resurrection of the failed node
JEUS Server
Servlet
Engine
EJB
failure
Auto restarting
Fail-over
detected
JEUS 2.0

24. Multi-node Management
Failure
Rejoining of The failed node
Periodic checking For resurrection
Failure detect
Backup engines
started
Initially ring
Dynamic scale-up by adding a node at runtime
System scaled
dynamically
Changing
Node information
By sending join signal
JEUS 2.0

25. JEUS Roadmap JEUS JEUS 2.0 Spec. (2001.04) JEUS 3.0 Spec. (2001.08)
Dev.
Test
Release
Version
Q1’01
Q2’01
Q3’01
Q4’01 1 2 3 4 5 6 7 8 9 10 11 12
JEUS
2.0
3.0
JEUS 2.0 Spec. ( )
JEUS 3.0 Spec. ( )
EJB (1.1 full, 2.0 partially)
Servlet (2.2 full)
JSP (1.1 full)
JMS (1.0.3 partially)
JNDI (1.2.1 partially)
JAXP (1.1)
JTA (1.0.1)
RMI compiler(1.7)
Security(realm management, SSL for web clients)
JDBC Connection Pool Administration/Deployment tool
Failover & load balancing in a cluster
EJB (2.0)
Servlet (2.3)
JSP (1.2)
JMS (1.0.3)
JNDI (1.2.1)
XSL
Security(JAAS 1.0, SSL over a cluster) Connector (1.0)
Administration/Deployment tool
Web Administration
JEUS 2.0