This document outlines an agenda for a presentation on building content applications with the Java Content Repository (JCR) and OSGi. The presentation will cover getting to know the JCR API, common implementations like Jackrabbit and Apache Sling, developing RESTful applications on JCR with OSGi, and future developments like JCR 333 and Jackrabbit 3. Hands-on examples will also be provided to demonstrate server-side OSGi development and using the Apache Sling Scripting Engine.

1. Building Content Applications with JCR and OSGi
Cédric Hüsler | Enterprise Platform Evangelist
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2. Yours truly
§ from Basel, Switzerland
§ Enterprise Platform Evangelist
at Adobe
§ Open web technologies and scaling
architecture / infrastructure.
§ Twi er: @keepthebyte
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3. A few questions…
§ Played around with JCR API in the past?
§ Using the JCR API today?
§ Develops OSGi-based apps?
§ Develop RESTful web applications?
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4. Agenda
§ Ge ing to know JSR-283 - the Content Repository API
§ Usage of JCR in the wild
§ 3 in 1: Jackrabbit + Felix + Sling [Hands-on]
§ Supported protocols and APIs
§ Server-side OSGi with Apache Felix [Hands-on]
§ Develop RESTful web application on JCR [Hands-on]
§ Having fun with the Apache Sling Script Engine [Hands-on]
§ Future outlook: JCR 333 and Jackrabbit 3
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5. Everything is Content
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6. Roy Fielding / Principal Scientist - Chief Scientist
Roy T. Fielding
Apache
Apache
Apache Software
WebServer Foundation License REST HTTP URL
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7. Content Repository Structure (simpli ed)
parent
node
type nt:folder nt: le nt:unstructured rep:User rep:ACL nt:nodeType …
mixins mix:versionable mix:lockable sling:VanityPath cq:Taggable ….
key = value string long date path binary ….
key = values[] string long date path binary …
nodes
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8. On the Java Content Repository API
“It’s a database that looks like a javax.jcr
le system and features all the - Node
good stuff like unstructured, - Property
versioning, observation, access - Repository
control…” - Workspace
javax.jcr.lock
javax.jcr.nodetype
javax.jcr.observation
javax.jcr.query
javax.jcr.query.qom
javax.jcr.retention
JSR-170 (2002-2005) javax.jcr.security
JSR-283 (2005-2009) javax.jcr.util
JSR-333 (2010-....) javax.jcr.version
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9. Open Source Implementations in the Wild
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10. 3 in 1: Content Application Platform
• Application layer for JCR repositories
• OSGi-based
• script=servlet
• Powerful default servlets
h p://sling.apache.org • “any” scripting language thanks to JSR-223
• Implements OSGi Service Platform - Version 4.2
h p://felix.apache.org
• Reference Implementation of JSR 170 and JSR 283
• WebDAV built-in
• Remoting via RIM and HTTP
h p://jackrabbit.apache.org
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11. Content Repository – Built-in Protocols/APIs
Add, consume, managed content with these interfaces:
§ Java Content Repository API – complete JCR 2.0 implementation
§ Content Management Interoperability Services - CMIS 1.0
§ WebDAV – with versioning, access control and search
§ Windows Network File Share – CIFS/SMB
§ RESTful Web API for JavaScript and Flash/Flex
§ Java Remoting with RMI and HTTP
§ LDAP and any JAAS plug-in
§ Native repository interface via Virtual Repository – e.g. Microso SharePoint
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12. Play with it now?
• Download Sling Standalone Application
(the 100% Open Source distribution)
h p://bit.ly/apachesling
• Download CRX from Adobe
(commercial package with web-based IDE and DB-less persistence)
h p://bit.ly/crxdownload
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13. RESTful Content Rendering Example (with Apache Sling)
GET /products/english/18846.html
Repository Path Render Code
Resource Type
Resolution
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14. RESTful Content Editing Example (with Apache Sling)
POST /products/english/18846/comments/*
Repository Path
Title as node
name
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15. Managed Java services in OSGi Container
Security
Bundle B
V2.1.0
Services Bundle A Bundle B
V1.1.0 V2.0.0
Bundle A Bundle B Bundle C
Service Registry V1.0.0 V1.0.0 V1.0.0
Life Cycle Class Loading
OSGi Container in Content Repository
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16. Sling and Scripting Language Support (JSR 233)
Add language support via OSGi bundle
§ JavaScript & JSP included by default
§ Scala: h ps://cwiki.apache.org/SLING/using-scala-with-sling.html
§ Groovy: h p://sling.apache.org/site/groovy-support.html &
h p://groovy.codehaus.org/Download
§ Python
§ Ruby
§ more see Sling SVN
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17. Typical Developer Setup with Content Repository
QA PROD
Sub- App Packages App
version CR CR
Load
Balancer
Package &
Share HTTP
Accelerator
App
App CR
CR CRXDE
LDAP, CRM, Billing, ECM Repositories
Any IDE Vault
DEV
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18. Content Repository Clustering (Share Nothing vs. Share DataStore)
Node 1 Node 2
Your Application Your Application
Content Repository Open connection for 2-way
Content Repository
[Master] communication to fetch
changes from master & get
noti cations.
Index Data Data Index
TarPM Forward writes TarPM
Store Store
Read/write Binaries Read Binaries
DataStore
Shared FS / S3
Install Content Repository on Amazon EC2 – check out: h p://dev.day.com/installcrxonec2
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19. What up next?
§ Jackrabbit 3
§ h p://wiki.apache.org/jackrabbit/RoadMap
§ Join the discussion on the mailing list
§ JSR 333
§ h p://www.jcp.org/en/jsr/detail?id=333
1. Ease of API use: Make simple, things simple.
2. Lower entry barriers for implementers and application developers.
3. Scripting support of the API.
4. Client-server awareness.
5. Protocol and SPI bindings. Binding and liaison to OASIS / CMIS.
6. Maintenance and feedback container for implementers, users and non-users. Gauge real-world
interoperability.
7. Node type library.
8. Internationalization.
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20. © 2011 Adobe Systems Incorporated. All Rights Reserved. Adobe Con dential.