This session describes the architecture and implementation of an embeddable, extensible enterprise content management core for Java EE and simpler platforms. The presentation starts by describing the general architectural concepts used as building blocks: • A schema and document model, reusing XML schemas and making good use of XML namespaces, where document types are built with several facets • A repository model, using hierarchy and versioning, with the Content Repository API for Java (JSR 170) being one of the possible back ends • A query model, based on the Java Persistence query language (JSR 220) and reusing the path-based concepts from Java Content Repositories (JCR) • A fine-grained security model, compatible with WebDAV concepts and designed to provide flexible security policies • An event model using synchronous and asynchronous events, allowing bridging through Java Message Service (JMS) or other systems to other event-enabled frameworks • A directory model, representing access to external data sources using the same concepts as for documents but taking advantage of the specificities of the data back ends Suitable abstraction layers are put in place to provide the required level of flexibility. One of the main architectural tasks is to find commonalities in all the systems used (or whose use is planned in the future) so framework users need to learn and use a minimal number of concepts. The result is a set of concepts that are fundamental to enterprise document management and are usable through direct Java technology-based APIs, Java EE APIs, or SOA. The presentation shows, for each of the main components, which challenges have been met and overcome when building a framework in which all components are designed to be improved and replaced by different implementations without sacrificing backward compatibility with existing ones. The described implementation, Nuxeo Core, can be embedded in a basic Java technology-based framework based on OSGi (such as Eclipse) or in one based on Java EE, according to the needs of the application using it. This means that the core has to function without relying on Java EE services but also has to take advantage of them when they are available (providing clustering, messaging, caching, remoting, and advanced deployment).

1. Building an Embeddable Enterprise Content
Management Core With the Latest Java™
Technologies
Florent Guillaume Arnaud Lefevre
Chief Scientist VP of Sales
Nuxeo
www.nuxeo.com
TS-4532
2007 JavaOneSM Conference | Session TS-4532 |

2. Goal of This Session
Learn how a Content Management core is built
Learn about the design and use of
Nuxeo™ 5, an embeddable, extensible
Enterprise Content Management framework
for Java™ Platform, Enterprise Edition
(Java™ EE platform) and other platforms.
2007 JavaOneSM Conference | Session TS-4532 | 2

3. Agenda
What Is Enterprise Content Management
What Do We Want to Achieve
Core Framework
Core and High-Level Services
UI Layers
Extensible and Pluggable
Using the Framework
2007 JavaOneSM Conference | Session TS-4532 | 3

4. Agenda
What Is Enterprise Content Management
What Do We Want to Achieve
Core Framework
Core and High-Level Services
UI Layers
Extensible and Pluggable
Using the Framework
2007 JavaOneSM Conference | Session TS-4532 | 4

5. What Is
Enterprise Content Management?
1990–2000…
Manufacturing
●
Supply Chain
●
HR
●
ERP
Unification
Accounting
●
Activity Management
●
Shipping
●
2007 JavaOneSM Conference | Session TS-4532 | 5

6. What Is
Enterprise Content Management?
2000–20...
Documents (Records, E-Mail, Media)
●
Acquisition
●
Search Engine
●
ECM
Archiving Unification
●
Collaboration
●
Web Publishing
●
Access Control
●
Compliance
●
2007 JavaOneSM Conference | Session TS-4532 | 6

7. What Is
Enterprise Content Management?
The technologies used to:
Capture
●
Create
●
Manage
●
Store
●
Preserve
●
Reuse
●
Deliver
●
content within the enterprise
2007 JavaOneSM Conference | Session TS-4532 | 7

8. Agenda
What Is Enterprise Content Management
What Do We Want to Achieve
Core Framework
Core and High-Level Services
UI Layers
Extensible and Pluggable
Using the Framework
2007 JavaOneSM Conference | Session TS-4532 | 8

9. What Do We Want to Achieve?
Create a Framework
●
Make It Extensible
●
Make It Multi-Platform
●
Use the Latest Technologies
●
Open Source
●
2007 JavaOneSM Conference | Session TS-4532 | 9

10. What Do We Want to Achieve?
Create a Framework
●
Set of Services
●
Software Bundles
●
Set of APIs
●
Open to other systems
●
Configuration
●
XML rather than code
●
2007 JavaOneSM Conference | Session TS-4532 | 10

11. What Do We Want to Achieve?
Create a Framework
●
Make It Extensible
●
New services
●
New backends to existing services
●
2007 JavaOneSM Conference | Session TS-4532 | 11

12. What Do We Want to Achieve?
Create a Framework
●
Make It Extensible
●
Make It Multi-Platform
●
POJOs
●
Java EE platform
●
Clusterable, distributable
●
Eclipse
●
Rich Client Platform (RCP)
●
Mix of those
●
RCP client, Java EE platform server
●
2007 JavaOneSM Conference | Session TS-4532 | 12

13. What Do We Want to Achieve?
Create a Framework
●
Make It Extensible
●
Make It Multi-Platform
●
Use the Latest Technologies
●
Java platform v.5, Java EE 5
●
OSGi
●
JCR (JSR-170, JSR-283), W3C XML Schemas
●
JavaServer Faces™ technology, Facelets
●
BPEL, WfMC
●
SOAP, WSDL
●
JSR = Java Specification Request
2007 JavaOneSM Conference | Session TS-4532 | 13

14. What Do We Want to Achieve?
Create a Framework
●
Make It Extensible
●
Make It Multi-Platform
●
Use the Latest Technologies
●
Open Source
●
LGPL, EPL
●
http://www.nuxeo.org
●
2007 JavaOneSM Conference | Session TS-4532 | 14

15. Agenda
What Is Enterprise Content Management
What Do We Want to Achieve
Core Framework
Core and High-Level Services
UI Layers
Extensible and Pluggable
Using the Framework
2007 JavaOneSM Conference | Session TS-4532 | 15

16. Core Framework
The basics
Schemas
●
Document Types
●
Life Cycle
●
Repository
●
Security
●
2007 JavaOneSM Conference | Session TS-4532 | 16

17. Core Framework
Schemas
●
Structure the documents
●
XML Schemas
●
Complex Types
●
Attached Files
●
2007 JavaOneSM Conference | Session TS-4532 | 17

18. Core Framework: Schema
DublinCore
<xs:schema>
<xs:element name=quot;titlequot; type=quot;xs:stringquot;/>
<xs:element name=quot;descriptionquot; type=quot;xs:stringquot;/>
<xs:element name=quot;rightsquot; type=quot;xs:stringquot;/>
<xs:element name=quot;createdquot; type=quot;xs:datequot;/>
<xs:element name=quot;modifiedquot; type=quot;xs:datequot;/>
<xs:element name=quot;issuedquot; type=quot;xs:datequot;/>
<xs:element name=quot;formatquot; type=quot;xs:stringquot;/>
<xs:element name=quot;languagequot; type=quot;xs:stringquot;/>
...
</xs:schema>
2007 JavaOneSM Conference | Session TS-4532 | 18

19. Core Framework: Schema Baddies
<xs:schema>
<xs:complexType name=quot;baddiequot;>
<xs:sequence>
<xs:element name=quot;surnamequot; type=quot;xs:stringquot;/>
<xs:element name=quot;levelquot; type=quot;xs:positiveIntegerquot;/>
<xs:element name=quot;birthquot; type=quot;xs:datequot;/>
</xs:sequence>
</xs:complexType>
<xs:complexType name=quot;baddiesquot;>
<xs:sequence>
<xs:element name=quot;baddiequot; type=quot;baddiequot;
minOccurs=quot;0quot; maxOccurs=quot;unboundedquot;/>
</xs:sequence>
</xs:complexType>
<xs:element name=quot;baddiesquot; type=quot;baddiesquot;/>
</xs:schema>
2007 JavaOneSM Conference | Session TS-4532 | 19

20. Core Framework: XML Equivalent
<baddies>
<baddie>
<surname>Sylar</surname>
<level>38</level>
<birth>1962-06-11</birth>
</baddie>
</baddies>
2007 JavaOneSM Conference | Session TS-4532 | 20

21. Core Framework
Schemas
●
Document Types
●
High-level name
●
Aggregate schemas
●
Facets
●
2007 JavaOneSM Conference | Session TS-4532 | 21

22. Core Framework: Document Type
<doctype name=quot;Notequot; extends=quot;Documentquot;>
<schema name=quot;dublincorequot;/>
<schema name=quot;notequot;/>
<facet name=quot;Commentablequot;/>
<facet name=quot;Versionablequot;/>
<facet name=quot;Publishablequot;/>
</doctype>
2007 JavaOneSM Conference | Session TS-4532 | 22

23. Core Framework
Schemas
●
Document Types
●
Life Cycle
●
States
●
Transitions
●
2007 JavaOneSM Conference | Session TS-4532 | 23

24. Core Framework: Life Cycle States
<lifecycle name=quot;defaultquot; initial=quot;projectquot;>
<states>
<state name=quot;projectquot;>
<transitions>
<transition>approve</transition>
</transitions>
</state>
<state name=quot;approvedquot;>
<transitions>
<transition>obsolete</transition>
</transitions>
</state>
<state name=quot;obsoletequot;/>
</states>
...
2007 JavaOneSM Conference | Session TS-4532 | 24

25. Core Framework: Life Cycle
Transitions
<lifecycle name=quot;defaultquot; initial=quot;projectquot;>
...
<transitions>
<transition name=quot;approvequot; destination=quot;approvedquot;>
<description>Approve the document</description>
</transition>
<transition name=quot;obsoletequot;
destination=quot;obsoletequot;>
<description>Obsolete the document</description>
</transition>
</transitions>
</lifecycle>
2007 JavaOneSM Conference | Session TS-4532 | 25

26. Core Framework
Schemas
●
Document Types
●
Life Cycle
●
Repository
●
Hierarchical
●
Versioning
●
Backend
●
API
●
2007 JavaOneSM Conference | Session TS-4532 | 26

27. Core Framework: Repository
Hierarchical
●
Servers, Domains
●
Tree of documents
●
Versioning
●
Save, View, Restore
●
Policy
●
Backend
●
JCR, SQL
●
API
●
Nuxeo 5, JCR 2 (JSR 283)
●
2007 JavaOneSM Conference | Session TS-4532 | 27

28. Core Framework
Schemas
●
Document Types
●
Life Cycle
●
Repository
●
Security
●
Users, Groups
●
Permissions
●
ACLs
●
2007 JavaOneSM Conference | Session TS-4532 | 28

29. Core Framework: Security ACLs
Basic Access Control Entry (ACE)
●
DENY Read to Anonymous
●
GRANT Write to group:Developers
●
Ordered List
●
Manipulated by different services
●
User assignment
●
Workflow
●
Record management locks
●
Placeful and Inherited
●
2007 JavaOneSM Conference | Session TS-4532 | 29

30. Agenda
What Is Enterprise Content Management
What Do We Want to Achieve
Core Framework
Core and High-Level Services
UI Layers
Extensible and Pluggable
Using the Framework
2007 JavaOneSM Conference | Session TS-4532 | 30

31. Core Services
Fundamental Services
Event System
●
Directories
●
User Manager
●
Query
●
2007 JavaOneSM Conference | Session TS-4532 | 31

32. Core Services
Event System
●
Synchronous Listeners
●
Low Level
●
Creation, Modification, Deletion
●
Move, Copy
●
Security Changes
●
Bridged to Java Message Service (JMS)
●
Asynchronous Handlers
●
Non-Core components can participate
●
2007 JavaOneSM Conference | Session TS-4532 | 32

33. Core Services
Event System
●
Directories
●
Tabular Data
●
Users and Groups
●
Vocabularies
●
Entries are placeless documents
●
2007 JavaOneSM Conference | Session TS-4532 | 33

34. Core Services: Directory
<directory name=quot;countryquot;>
<schema>vocabulary</schema>
<dataSource>java:/nxsqldirectory</dataSource>
<table>country</table>
<idField>id</idField>
<sqlScript>country.sql</sqlScript>
</directory>
<xs:schema>
<xs:element name=quot;idquot; type=quot;xs:stringquot;/>
<xs:element name=quot;labelquot; type=quot;xs:stringquot;/>
<xs:element name=quot;obsoletequot; type=quot;xs:booleanquot;/>
</xs:schema>
2007 JavaOneSM Conference | Session TS-4532 | 34

35. Core Services
Event System
●
Directories
●
User Manager
●
Bridge directories and user authentication
●
Interfaces with the application server
●
Global defaults
●
2007 JavaOneSM Conference | Session TS-4532 | 35

36. Core Services
Event System
●
Directories
●
User Manager
●
Query
●
Multiple Backends
●
Intelligent Dispatcher
●
Query Language: NXQL
●
2007 JavaOneSM Conference | Session TS-4532 | 36

37. Core Services: Query
SELECT * FROM Documents WHERE
dc:title LIKE 'JavaOne%'
SELECT * FROM Documents WHERE
dc:modified >= TIMESTAMP '2007-01-01T00:00:00'
SELECT * FROM Documents WHERE
ecm:path STARTSWITH '/customers/proposals'
2007 JavaOneSM Conference | Session TS-4532 | 37

38. High-Level Services
Advanced functionality
Audit and Logging
●
Comments
●
Transformations
●
Relations
●
Workflow
●
Action Manager
●
Mime Types
●
Scheduler
●
2007 JavaOneSM Conference | Session TS-4532 | 38

39. Layered Framework: Functional
View
Web App RCP App Flex App
Nuxeo Runtime
High-Level Services
Transform Audit Relation Indexing ...
JDBC™
OOo Jena Compass
Nuxeo Core Services
Storage Schemas Versions Security ...
Jackrabbit
JDBC™ = Java DataBase Connectivity
2007 JavaOneSM Conference | Session TS-4532 | 39

40. Layered Framework: Workflow
org.nuxeo.ecm.platform.workflow.api
org.nuxeo.ecm.platform.workflow.client
org.nuxeo.ecm.platform.workflow.core
org.nuxeo.ecm.platform.workflow.document
org.nuxeo.ecm.platform.workflow.document-api
org.nuxeo.ecm.platform.workflow.document-facade
org.nuxeo.ecm.platform.workflow.facade
org.nuxeo.ecm.platform.workflow.jbpm
2007 JavaOneSM Conference | Session TS-4532 | 40

41. Layered Framework: Workflow
EJB™
Seam WF Client
WF Facade Doc Facade
Workflow API WF Doc API Nuxeo Core API
WF
Core
Doc Core Nuxeo Core
jBPM
EJB™ = Enterprise JavaBeans™
2007 JavaOneSM Conference | Session TS-4532 | 41

42. DEMO
2007 JavaOneSM Conference | Session TS-4532 | 42

43. Agenda
What Is Enterprise Content Management
What Do We Want to Achieve
Core Framework
Core and High-Level Services
UI Layers
Extensible and Pluggable
Using the Framework
2007 JavaOneSM Conference | Session TS-4532 | 43

44. UI Layers
How the user interacts with the system
Web
●
JavaServer Faces technology, Ajax4jsf, Facelets
●
EJB specification Action Listeners
●
JBoss Seam
●
Theming Engine: NXThemes
●
Eclipse RCP
●
2007 JavaOneSM Conference | Session TS-4532 | 44

45. Nuxeo 5 Screenshot
2007 JavaOneSM Conference | Session TS-4532 | 45

46. Eclipse Screenshot
2007 JavaOneSM Conference | Session TS-4532 | 46

47. Agenda
What Is Enterprise Content Management
What Do We Want to Achieve
Core Framework
Core and High-Level Services
UI Layers
Extensible and Pluggable
Using the Framework
2007 JavaOneSM Conference | Session TS-4532 | 47

48. NXRuntime:
Extension Points
Nuxeo Core Blog Module
Comment Service Blog Extensions
Type Service
Storage Module
Storage Service Jackrabbit Storage
2007 JavaOneSM Conference | Session TS-4532 | 48

49. NXRuntime:
Extension Points
<component name=quot;core.TypeServicequot; version=quot;1.0quot;>
<implementation
class=quot;org.nuxeo.ecm.core.schema.TypeServicequot;/>
<extension-point name=quot;schemaquot;>
<object
class=quot;org.nuxeo.ecm.core.schema.SchemaBinding-
Descriptorquot;/>
</extension-point>
<extension-point name=quot;doctypequot;>
<object class=quot;org.nuxeo.ecm.core.schema.DocumentType-
Descriptorquot;/>
</extension-point>
</component>
2007 JavaOneSM Conference | Session TS-4532 | 49

50. NXRuntime:
Extension Point Contributions
<component name=quot;MyTypesquot; version=quot;1.0quot;>
<extension target=quot;core.TypeServicequot; point=quot;schemaquot;>
<schema name=quot;commonquot; src=quot;common.xsdquot;/>
<schema name=quot;dublincorequot; src=quot;dublincore.xsdquot;
prefix=quot;dcquot;/>
</extension>
<extension target=quot;core.TypeServicequot; point=quot;doctypequot;>
<doctype name=quot;Notequot; extends=quot;Documentquot;>
<schema name=quot;commonquot;/>
...
</doctype>
</extension>
</component>
2007 JavaOneSM Conference | Session TS-4532 | 50

51. Services Are Pluggable
One implementation isn’t always sufficient
Internal Service Provider Interfaces (SPI)
●
Repository Backend
●
Directory Backend
●
Workflow Service
●
Indexing Service
●
Relation Service
●
Transformation Service
●
2007 JavaOneSM Conference | Session TS-4532 | 51

52. Plug Into Different Platforms
Run anywhere
POJO Bundles
●
OSGi Dependencies
●
Extension Points
●
Generic Lookup Service
●
Java EE platform Deployment
●
JBoss
●
GlassFish
●
2007 JavaOneSM Conference | Session TS-4532 | 52

53. Plug Into Java EE Platform:
Problems
Modules hard to reuse on other platforms
●
XML module descriptors don’t allow
●
fragmentation
Hardcoded package names in code or XML
●
Cannot add functionality without redeploying
●
the entire application
No extension model (plugins)
●
2007 JavaOneSM Conference | Session TS-4532 | 53

54. Plug Into Java EE Platform:
Deployment
Deployment
●
Ordering
●
Dynamic Activation
●
Contributed XML descriptors
●
EAR: application.xml, jboss-app.xml
●
WAR: web.xml, faces-config.xml, pages.xml
●
Other: persistence.xml, datasources
●
L10n properties files
●
Services as MBeans
●
Lookup Service
●
2007 JavaOneSM Conference | Session TS-4532 | 54

55. Plug Into OSGi
OSGi as Basic Format
●
Java Archive (JAR)
●
Meta-Information
●
NXRuntime
●
Extension points
●
Definition
●
Contributions
●
Specialized Deployment
●
2007 JavaOneSM Conference | Session TS-4532 | 55

56. Agenda
What Is Enterprise Content Management
What Do We Want to Achieve
Core Framework
Core and High-Level Services
UI Layers
Extensible and Pluggable
Using the Framework
2007 JavaOneSM Conference | Session TS-4532 | 56

57. Using the Framework
How to build an application with it
Contribute to Extension Points
●
Schemas, Documents
●
Actions
●
Event Listeners
●
Directories
●
XHTML UI
●
JavaServer Faces technology
●
EJB specification Action Listeners
●
Seam
●
Deployment Rules
●
2007 JavaOneSM Conference | Session TS-4532 | 57

58. Using the Framework:
JavaServer Faces Technology
<h:outputText value=quot;#{messages['label.edit']}quot;
class=”top”/>
<h:form>
<h:panelGrid columns=quot;3quot; styleClass=quot;dataInputquot;
columnClasses=quot;labelColumn,fieldColumnquot;>
<h:outputText value=quot;#{messages['label.title']}quot;/>
<h:inputText
value=quot;#{currentDocument.dublincore.title}quot;
class=quot;dataInputTextquot; id=quot;titlequot; required=quot;truequot;>
<f:validateLength minimum=quot;5quot;/>
</h:inputText>
<h:message styleClass=quot;errorMessagequot; for=quot;titlequot;/>
<h:outputText value=quot;quot;/>
<h:commandButton value=quot;#{messages['label.save']}quot;
styleClass=quot;buttonquot; type=quot;submitquot;
action=quot;#{documentActions.updateCurrentDocument}quot;/>
</h:form>
2007 JavaOneSM Conference | Session TS-4532 | 58

59. Using the Framework:
Action Listener
@Stateless
@Name(quot;myActionsquot;)
public class MyActionsBean implements MyActions {
@In(required = true)
protected Document currentDocument;
public String doSubmit() throws ClientException {
String title =
currentDocument.getProperty(quot;dc:titlequot;);
title += quot; (Captured)quot;;
currentDocument.setProperty(quot;dc:titlequot;, title);
currentDocument.save();
return null;
}
}
2007 JavaOneSM Conference | Session TS-4532 | 59

60. Summary
Modular Framework
●
Flexible Backends
●
Platform Independent
●
Easy Extensions
●
Open Source
●
We Welcome Your Ideas and Contributions!
●
2007 JavaOneSM Conference | Session TS-4532 | 60

61. For More Information
http://www.nuxeo.org/
http://svn.nuxeo.org/
http://lists.nuxeo.com/mailman/listinfo/ecm
2007 JavaOneSM Conference | Session TS-4532 | 61

62. Q&A
Florent Guillaume
Chief Scientist
Arnaud Lefevre
VP of Sales
2007 JavaOneSM Conference | Session TS-4532 | 62

63. Building an Embeddable Enterprise Content
Management Core With the Latest Java™
Technologies
Florent Guillaume Arnaud Lefevre
Chief Scientist VP of Sales
Nuxeo
www.nuxeo.com
TS-4532
2007 JavaOneSM Conference | Session TS-4532 |