1. Sakai
,
- , 1-2 , 2008
Sakai 构
Xingtang Hu(Hu2@iupui.edu)
Lance Speelmon(lance@indiana.edu)
Michael Korcuska(mkorcuska@gmail.com)
/ SAKAI
1 21 , 2008

2. ,
,
2006 /
2006
2002
2001
Lance Speelmon,
Oncourse Sakai 构 ,
Michael Korcuska,
Sakai 运

3. • Sakai
• Sakai 构
– Tomcat (classloader)
– Spring (components
manager)
• Sakai 开
– (Tools and services)
– (WebApp structure)
• Sakai

4. Sakai
•
• , ,
•
•
• Java
•

5. Sakai

6. • AuthzGroupService
• SiteService
• ToolManager
• SessionManager
• ContentHostingService
•
CourseManagementService

7. Sakai
•
– UserDirectoryProvider – map your local user information
(eg in LDAP, IMS Enterprise, Kerberos) into Sakai
– GroupProvider
– CourseManagementProvider
– PortalHandler (new in Sakai 2.4) – register new top-level
handlers in the Sakai portal URL space
– EntityProducer – export primary entities handled by your service as
1st-class Sakai “Entities” (resolvable by URLs, addressible by Events, searchable)
• Sakai

8. Sakai
• Sakai J2EE (Servlet)
(container)
– Tomcat, WebSphere, WebLogic
• Sakai (tool) ,
Servlet
• Sakai (component) Sakai API ,
Spring Beans

9. ,
• Tools(web)
– (persistence)
– presentation (GUI)
• Services / Components(API/Impl)
– Must provide documented API
– presentation (not aware of HTML at all)
– , (not data models)
• Framework(Tomcat)
– tools and service
– common capabilities
– domain objects

10. Sakai
• 构
Presentation Services (SAF)
TOOLS
•
• 离 Abstract Tool Layout
•
SERVICES Tool Code (Java)
•
•
•
(APIs)
FRAMEWORK
• Application Services
•
•
Common Services
(SAF)
Kernel (SAF)

11. Sakai 构
Shared
Model Logic-api Public-api
(business logic) (service)
Components
Dao-api
(data access)
Logic-impl
(business logic)
Webapps
Dao-impl
Tool (data access)
(presentation)
URL: http://issues.sakaiproject.org/confluence/x/BGo

12. 构
构 3-tier architecture External
Presentation User
Business Logic Other Apps
Data Access Database

13. Presentation Layer
3-tier architecture •
• (GUI)
Presentation
(client view)
•
Business Logic business logic
data
access
Data Access

14. Logic Layer
3-tier architecture •
Presentation •
•
(presentation)
Business Logic (data
access)
Data Access

15. Data Access Layer
3-tier architecture •
Presentation •
•
Business Logic (presentation )
(business logic)
Data Access

16. 关
3-tier architecture • ,
减
Presentation •
Business Logic
Data Access

17. Sakai
Component Manager
• Spring bean
Sakai ,
•
• Sakai

18. Sakai
Component Manager

19. Tomcat (Container)
Tomcat – The Server
Services
Engine (Catalina)
Hosts Realm
AJP Connector Valves
Context
8009
SSL Connector Valves JSPs Servlets
8443
HTTP Connector Valves
8080

20. Tomcat (J2EE)
• Java ClassLoaders
• Servlet (container)
• Web (ClassLoaders)
,

21. Sakai (ClassLoaders)
APIs up here
Components in here
Tools in here Component1 Component2
• Sakai J2EE ClassLoader layout
• Sakai (webapps) Servlets
– URLClassLoader
–
•
– components.xml (Spring file), web web.xml
– , Servlet (dispatches)

22. Sakai (Tools)
• Sakai (Tools) Servlet
– RSF, JSF Velocity
– web (web.xml) file (tools/
toolname.xml)
• App Builder (Plugin)
– (applicationContext.xml)
Spring (context) , Sakai
(services) Spring
– Spring (JARs ) 份,
(Web application)

23. Spring (beans)
• Spring (
(Dependency Injection)/
IoC )
• Java
(getters ) (setters)
• Spring
( init() )

24. Springy
• web.xml
(ContextLoaderListener)
• (bean definitions)
• Sakai
(services)

25. Sakai 开
• Sakai (component)
– (API module)
• Java (interface definitions)
(constants)
• JAR (shared area)
– (Impl module)
• (API interfaces )
• Spring (components.xml )
Spring (context)
• WAR (components area)

26. Sakai (Services)
• Sakai (services) Spring
(context) Spring beans
• 每 Sakai (component) Spring
components.xml
• Sakai 启 ,
.

27. Spring Sakai (Services)
• Sakai (APIs) Java (interfaces)
• 每 Sakai (APIs)
• Sakai Spring (components.xml) Spring bean
• : Spring Sakai
(UserDirectoryService)
<bean id="org.sakaiproject.user.api.UserDirectoryService“
class="org.sakaiproject.user.impl.DbUserService"
init-method=“init”
destroy-method="destroy" singleton="true">
......
<property name="autoDdl“ value=“${auto.ddl}”/>
<property name="cacheMinutes“ value=“5”/>
</bean>

28. ComponentManager
mgr.get(“org.sakaiproject.site.api.SiteService”);
• Spring
(ApplicationContext)
• id Class

29. Sakai 构
• 4
– Api (interfaces)
• Logic - business logic and dao apis
• Model - POJOs (value/data objects)
• Public - Service API (if you have one)
• Hbm - Hibernate HBM files
– Impl (implementations)
• Dao - data access implementation
• Logic - business logic implementation
• Tests - programmatic tests (unit/integration)
– Pack (component definitions)
• Spring (Sakai components.xml)
– Tool (webapp)
• Java src/java - java classes used by your tool only
• 关 src/webapp - xml, jsp, html, other meta files
URL: http://issues.sakaiproject.org/confluence/x/BGo

30. 构
URL: http://issues.sakaiproject.org/confluence/x/BGo

31. Sakai 构
• org.sakaiproject - base package prefix
– You could also use your local prefix (e.g. uk.ac.cam.caret)
• org.sakaiproject.app-name
• Use something unique for app-name, long is good
– dao - data access
– hbm – hibernate mapping files
– Logic – business logic
– Model – value/data objects
– Service – public api
– Tool – webapp
• Add impl to represent implementations
URL: http://issues.sakaiproject.org/confluence/x/BGo

32. 构
URL: http://issues.sakaiproject.org/confluence/x/BGo

33. Sakai Java
:
• ( event service)
• ActiveMQ 构

35. 2
1
m_eventTrackingService = (EventTrackingService) 3
ComponentManager.get("org.sakaiproject.event.api.EventTracking
Service");

36. Sakai
Sakai

37. Sakai Java (Applications)
Sakai
关
Sakai 启
Sakai 启

38. http://java.sun.com/products/jsp/
JSF http://java.sun.com/javaee/javaserverfaces/
http://www2.caret.cam.ac.uk/rsfwiki/
http://java.sun.com/products/servlet/
http://jakarta.apache.org/velocity/
AJAX http://en.wikipedia.org/wiki/AJAX

39. Java Server Pages
• 开
• 启 ,
• Sakai 运
• ,
•

40. JSF
Java Server Faces
• Java APIs
(managing state), (handling
events), (defining
navigation)
• JSP 渲
– JSPs 渲
• (tag libraries)
• ,
URL: http://java.sun.com/javaee/javaserverfaces/

41. JSF
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<html>
<head><title>JSF sample</title></head>
<body>
<f:view>
<h1><h:outputText value=“Hello #{user.name}"/></h1>
<h:dataTable id=“items"
value="#{itemsBean.items}" var=“item">
<h:column>
<h:outputText value="#{item.value}" />
</h:column>
</h:dataTable>
</f:view>
</body>
</html>

42. Reasonable Server Faces
• Spring (web
programming framework)
• XHTML , UI
Code 离
• Lightweight
• AJAX Javascript
URL: http://jakarta.apache.org/velocity/

43. <html>
<head><title>RSF sample</title></head>
<body>
<h1>Hello <span rsf:id=“user-name”>User Name</span></h1>
Today is <span rsf:id=“current-date”>1/1/2006</span><br/>
<table>
<tr rsf:id=“items:”>
<td rsf:id=“item-value”>item value here</td>
</tr>
</table>
</body>
</html>

45. Oncourse CL ,迁
Su/Fall 04 Spring 05 Su/Fall 05 Spring 06 Su/Fall 06
We Are Here – December 2005
Oncourse 2
Fall ’05 by Web form request only
Pilot Period – Limited Release
CL 1.5 CL 2.0 CL 2.1 CL 2.x
Sakai 开 构
Indiana, Michigan, Stanford Oncourse CL
and MIT
05 Oncourse CL

46. Oncourse CL 构
(IUB):
(IUPUI):

47. Sakai
•
WEB SYS
INSTITUTION USERS SITES SERVE INTEGRATION
RS
Indiana* 121,468 53,979 16 PeopleSoft
UNISA 92,000 4 Novell, ActiveDirectory
Michigan 67,281 17,453 8 UMIAC, Kerebos
Yale 14,569 4 Banner, CAS
Fernando Pessoa 5,250 2,000
UCT 4,040 48 2 PeopleSoft, Novell Nsure
Etudes Alliance** 2,560 79
UC, Merced 1,230 305 1 Banner, uPortal
Totals 308,398 73,864 34
*Indiana University: 2006 , 108,190 Oncourse CL .
**Etudes Alliance : 200 , 450 (07 02 ). Sakai
(Oncourse)

48. Sakai
•
• COMMUNITY PROCESSES — Sakai contact Mark Norton, Sakai
Community Process WG Chair (markjnorton@earthlink.net).
• 开 DEVELOPMENT — 开 join Sakai-Dev DG; review existing projects,
requirements, feature requests or contribute new tools and/or services; contact Peter
Knoop, Project Coordinator (knoop@umich.edu), or Anthony Whyte, Sakai Technical
Liaison (arwhyte@umich.edu).
• INFRASTRUCTURE — QA servers, JIRA/Confluence
hosting, contact Peter Knoop.
• QA — join QA Work Group, contact Megan May, QA Coordinator
(mmmay@indiana.edu).
• REQUIREMENTS & USE CASE DEVELOPMENT — join the
Requirements WG; contact Mara Hancock, REQ WG chair
(mara@media.berkeley.edu).

49. ?
http://sakaiproject.org/

50. Sakai
,
- , 1-2 , 2008
!
(hu2@iupui.edu)
Sakai/Oncourse
http://www.sakaiproject.org/