FrOScamp Zurich: Introducing JCR - 2010
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This document introduces JCR (JSR-170 and JSR-283), including: 1. An overview of JSR-170 and the development of JCR 1.0. 2. Details about JCR 2.0 such as backwards compatibility, reorganization, and new features like access control management, retention policies, and versioning. 3. Descriptions of implementations of JCR standards like Apache Jackrabbit and frameworks built on top of it like Apache Sling.
FrOScamp Zurich: Introducing JCR - 2010
- 2. Introductions David Nuescheler Chief Technology Officer [email protected] David Nuescheler JSR-170 Spec Lead [email protected] David Nuescheler Jackrabbit Committer / Member [email protected] David Nuescheler TC Member / CMIS-JCR Liaison [email protected]
- 3. Day Software
- 4. Introducing JCR 1.0 Beyond the Spec History, Adoption, Usage. Real-life use... 1 2 3 JCR 2.0 Evolution, What’s new?
- 5. JCR. “The API should be a standard, implementation independent, way to access content bi- directionally on a granular level to a content repository.”
- 6. A Content Repository!? CONTENT REPOSITORY FEATURES OF AN FEATURES OF A RDBMS FILESYSTEM Transactions, Query, Structure, Integrity Binaries, Hierarchy, Locking, Access Control + ALL THE OTHER GOOD STUFF YOU ALWAYS WANTED Data First, Versioning, Full-text, Multi-Value, Sort-Order, Observation
- 7. When to use? permissions binaries search JCR read-most versions unstructured 7
- 8. Reality Check! Task write a “JSP snippet” that lists all the documents in a folder by “title”. ...Code Snipp ets courtesy JSR- 70 Ex 1 of the early pert-Group :
- 9. Reality Check List all documents in a folder ession); <% new LAPI_DOCUMENTS(s LAPI_D OCUMENTS documents = new LLValue(); LLValue childTable = , s(volumeID, folderID <% documents.ListObject UMENTS.P ERM_SEE, childTable); null, null, LAPI_DOC lues(); childCount = node.getContent ildTable.enumerateVa Count(); Enum eration children = ch for(int i=0;i<childCount;i reElements()) { ++) { while(children.hasMo alue)e.nextElement() ; IContent child = node.getC LLValue child = (LLV JCR API ontent(i); toString("Name"); Property title = child.get PropertyByName("Title"); String title = child. %><%= title.getValue() %>< % br/><% %><%= title %><br/>< } %> <% } <% NodeIterator children = node.getNodes(); %> <% fndocs = new IFnObj while (children.hasNext()) { ile erator children = page.getPages(); PageIt wh (chi fnfold (idmFo lderCo Set er.get DualProxy( Conten ts Node child = children.nextNode();ldren.hasNext()) extPage(); Page child = children .n { int nu derCon Property title = child.getProperty("Title"); mDocs ntent. Container toplevel = for (i = fndo idmFol child.getContent(); nt i = cs.get tentDo Atom title = toplevel Count( .getAtom("Title"); 1; IFnDoc i <= numDocs ); umentD %><%=ntitle %><br /><% } %><%= title %><br /><% cume t )); ual fn ; i++) { new IF nD IFnPro ocumentDualP = pertie doc roxy(f } %> = %> tItem(new I IFnPro sD ndocs. pertyD ual propset ge Stri ng tit ual id fndo %><%= le = i mTitleProp = c.getPropert nteger(i))); ti dmTi pr ies ; if (co tle %><br/>< tleProp.getV opset<% etIte (); .g er.getDocuments()) mClean % alue() m("Tit cuments = new IDocumentsProxy(bind cleane up) ; ocuments dole"); ID r.rele { } ase(fn documents.cache(); (); +800 } doc); documents.getCount in t documentCount = { %> documentCount; i++) ByIndex(i)); for (int i = 0; i< ocumentProxy (documents.getItem document = new ID ment.getTitle() String title = docu ><% %><%= title %><br/ } %>
- 10. Beyond the Spec RI & TCK The S 300 pec: Apache Jackrabbit: Pages more than a reference implementation y nolog ility Kit: T ch atib e Comp 0 T sts e +100 10
- 11. JSR-170: Some Specifics Took about 4 years Investment for Day ~30 man years of work to complete (Spec, TCK & RI) First JSR in History of the JCP with a true Open Source License (Apache Style) Star Spec-Lead Award for process excellence The OSS Reference Implementation “Jackrabbit” graduated to a Top Level Apache Project
- 12. Java Only? Question? “A Content Repository Standard, sure, but why Java ‘only’?”
- 13. Why Java… …because of its standardizing body: The JCP. Good track record with respect to implementations and finished specifications Reference Implementations and Technology Compatibility Kit are mandatory Efficient Specification Cycles A lot of the JCR specification can still be applied other environments and languages
- 14. Introducing JCR Catalyst WEB apache JCR APP sling
- 15. The Web and Content? REST -> Roy T. Fielding ly JCR: Yours tru d 2005 rele a v1.0 rele ase ages sed y 162 p 2k +300 p ages
- 16. Industry Standards 170 283 16
- 17. Tracking success 17
- 18. Known Compliant Repositories (* partially using 3rd party connectors) Exo Microsoft Apache Jackrabbit Oracle XML DB ECMS Platform Sharepoint OpenText Livelink Day CRX IBM FileNet P8 Xythos Repository Alfresco ECM Vignette V7 Interwoven Saperion +hund reds o Repository IBM CM / Domino EMC Documentum Archive registe f TCKs red
- 19. Some known JCR Applications Fast BEA Portal Sun Oracle WebCenter Enterprise Search JBoss Portal Interface 21 OpenPortal Day Communique Spring Framework magnolia WCMS DAM Apache Sling Day Communique Alfresco ECMS Mindquarry Collab Collaboration Apache Tapestry QSLabs Apache Compliance Day Communiqué Cocoon WCMS IBM FileNet Artifactory medic-2-medic WebSiteManager Apache James Maven Proxy mapofmedicine Exo ECMS Platform TYPO3 GX WebManager v5.0 WCM InfoQ Hippo Liferay Nuxeo ECM Online Community CMS Enterprise Portal Jahia Sakai Percussion Framework E-learning Rhythmix QuickWCM Sourcemix WCMS Lutece Sourcemix Portal
- 20. Introducing JCR 1.0 Beyond the Spec History, Adoption, Usage. Real-life use... 1 2 3 JCR 2.0 Evolution, What’s new?
- 21. JSR-283: Some Specifics Took about 4 years Investment for Day ~30 man years of work to complete (Spec, TCK & RI) Star Spec-Lead Award for process excellence The OSS Reference Implementation “Apache Jackrabbit” Top Level Project
- 22. Backwards Compatible. NEW 100% & IMP BACKWA ROVE D COMPAT RDS IBLE Binary Compatible JSR-170 (JCR v1.0) Applications do not require modification Mixed environment supported (1.0 & 2.0 Apps)
- 23. Reorganized. NEW 100DEL & BINDING & IMP BACKWA ROVE D D % COMPAT RDS IMP ROVE & IBLE NEW MO Completely re-organized and clarified Specification Separate Content Repository model section Removed a lot of the Java Language specification
- 24. Bundled. NEW 100DEL & BINDING & IMP BACKWA ROVE D D % COMPAT RDS IMP ROVE & IBLE NEW MO NEW & IMPROVED OSGI BUNDLE Shipped jcr-2.0.jar is an OSGI Bundle Ready to deploy in an OSGI Container
- 25. Favorites. 10
- 26. Query extensions AQM JQOM NEW #1 QUER & IMP ROVE SQL 2.0 D Y Abstract Query Model Java Query Object Model (Java Binding) SQL Bindings
- 27. Query extensions +JOIN NEW & IMP #1 QUER ROVE 2.0 D Revamped Result-Set to allow for multiple nodes Y New and Improved query capabilities
- 28. Query extensions -XPATH *well, still available but deprecated * NEW & IMP Not enough support from the EG #1 QUER ROVE 2.0 D JQOM allows for many implementations Y Jackrabbit / CRX will support XPATH
- 29. Access Control Management +ACL +POLICY NEW & IM PROVED #2 ACL 2.0 Allows to set ACL and Access Control Policies
- 30. Retention Policy & Hold +RETENTION +LEGAL HOLD NEW & IMP ROVE #3 RM 2.0 D Support for interaction with RM systems Allows setting and introspection of Retention Policies and Holds
- 31. Simple versioning +LINEAR VERSIONING 2.0 ED NEW & IMPROV #4 SIMPLE Simplified Versioning Model to allow VERSIONING for ease of adoption.
- 32. Lifecycle Management +BPM Allows to express and introspect Lifecycle status NEW & IM and transitions. PROVED #5 LIFECYCLE 2.0
- 33. Nodetype Registration +REGISTER NODETYPES NEW & IMP ROVE #6 NODE 2.0 D MANAGE TYPE MENT Standardized way of registering new and modify registered Nodetypes
- 34. New property & nodetypes +mix:title +URL +mix:created +mix:lastModified +WEAK REFERENCE +mix:language +DECIMAL +mix:etag +nt:address NEW & IMPROVED #7 NEW PROPERTY & NODETYPES 2.0 Things we missed in JCR 1.0 applications
- 35. Workspace Management +CREATE & REMOVE WS 2.0 PROVED NEW & IM #8 WORKSPACE Standardized way of create and remove MANAGEMENT workspaces
- 36. Shareable nodes +GRAPH Multi-filing. Nodes can have multiple parents. 2.0 NEW & IMPROVED #9 SHAREABLE NODES
- 37. Journalling Observation +DELTA SINCE? NEW & IMP what changed since I last checked? #10 JOU ROVE 2.0 D RNALLIN OBSERVA G TION
- 38. Introducing JCR 1.0 Beyond the Spec History, Adoption, Usage. Real-life use... 1 2 3 JCR 2.0 Evolution, What’s new?
- 39. Beyond the Spec. NEW & IMP APACHE ROVE NEW & PJACKRABBIT 2.0 D ROVEN ;) Robust Code base Fully JCR 2.0 Compliant ;) More tooling than ever Established eco-system
- 40. Beyond the Spec. NEW & IMP APACHE ROVE NEW & PJACKRABBIT 2.0 D ROVEN ;) YST ATAL ING! C JCR APACHE SL Restful Web Framework Running on top of JCR Never build a JCR WebApp without it. Seriously!