Rapid JCR applications development with Sling

Rapid JCR applications development with Apache Sling Bertrand Delacrétaz Senior R&D Developer, Day Software, www.day.com Member and Director, ASF bdelacretaz@apache.org blog at http:/ /grep.codeconsult.ch twitter: @bdelacretaz Slides revision: 2009-03- 20 Slides theme design: David Nuescheler Wednesday, March 25, 2009

Rapid JCR applications development with Apache Sling Bertrand Delacrétaz Senior R&D Developer, Day Software, www.day.com Member and Director, ASF bdelacretaz@apache.org blog at http:/ /grep.codeconsult.ch twitter: @bdelacretaz Slides revision: 2009-03- 20 Slides theme design: David Nuescheler is thi busy s slide enou gh? Wednesday, March 25, 2009

Intro to JCR JCR = Java Content Repository API JSR-170 / JSR283 - Everything Is Content - and JCR manages it as trees of Nodes and Properties, using rich data types. Wednesday, March 25, 2009

Intro to JCR JCR = Java Content Repository API JSR-170 / JSR283 - silve r Everything Is Content - and JCR manages it as trees of Nodes and Properties, using rich data types. Wednesday, March 25, 2009

What’s JCR? JSR-170 Content Repository for JavaTM technology API Spec-Lead: Day Software Status: Final Release 17-jun-2005 Expert Group: Wednesday, March 25, 2009

What’s JCR? JSR-170 JSR-283 Content Repository for JavaTM technology API v2.0 Spec-Lead: Day Software Status: Public Review Closed sep-2007 Expert Group: Wednesday, March 25, 2009

Wednesday, March 25, 2009

What’s JCR? Wednesday, March 25, 2009

What’s JCR? “The API should be a standard, implementation independent, way to access content bi-directionally on a granular level to a content repository.” Wednesday, March 25, 2009

What’s JCR? “The API should be a standard, implementation independent, way to access content bi-directionally on a granular level to a content repository.” ? Wednesday, March 25, 2009

Best of both worlds. data base ﬁle s ys t e m hier- archi integ rity re es structu read streams tx write access query locking control multi- value ning obser- versio un-structured “full-text” sort vation order content repo sit or y Wednesday, March 25, 2009

Known compliant Repositories Wednesday, March 25, 2009

Known compliant Repositories * using third party connector * * Apache Exo Microsoft OpenText Jackrabbit Oracle XML DB ECMS Platform Sharepoint Livelink * Xythos Day CRX IBM FileNet P8 Repository Alfresco ECM Vignette V7 * * any ors ow mvendd? H S e +hun dre DBMou ne R do y Interwoven EMC TCKsds of regis Repository IBM CM Documentum tered Wednesday, March 25, 2009

Some known JCR Applications Wednesday, March 25, 2009

Some known JCR Applications Fast Enterprise BEA Portal Sun Oracle Portal Interface 21Search OpenPortal JBoss Portal Day Spring Communique Framework DAM Day magnolia WCMS Apache Sling Communique Alfresco ECMS Mindquarry ApacheCollab Collaboration Tapestry QSLabs Day Apache Compliance Communiqué IBM FileNet Cocoon WCMS Artifactory medic-2-medic WebSiteManage r Apache James Maven Proxy mapofmedicine Exo GX ECMS Platform TYPO3 WebManager v5.0 WCM InfoQ Liferay Online Hippo Enterprise Nuxeo ECM Community CMS Portal Jahia Sakai Percussion Framework E-learning Rhythmix QuickWCM Sourcemix WCMS Lutece Sourcemix Portal Wednesday, March 25, 2009

JCR code excerpt Repository repository = new TransientRepository(); Session session = repository.login(...); / Create content / Node root = session.getRootNode(); Node hello = root.addNode(quot;helloquot;); Node world = hello.addNode(quot;worldquot;); world.setProperty(quot;messagequot;, quot;Hello, World!quot;); session.save(); / Retrieve content / Node node = root.getNode(quot;hello/worldquot;); print(node.getPath()); print(node.getProperty(quot;messagequot;).getString()); Wednesday, March 25, 2009

On to Sling Wednesday, March 25, 2009

Sling builds on top of JCR Scriptable applications layer on top of JCR OSGi-based industrial-strength framework Simple, powerful, JCR inside Runs on Apache Jackrabbit by default http:/ /incubator.apache.org/sling Wednesday, March 25, 2009

Sling builds on top of JCR Scriptable applications layer on top of JCR OSGi-based industrial-strength framework Simple, powerful, JCR inside Runs on Apache Jackrabbit by default http:/ /incubator.apache.org/sling join t he fun! Wednesday, March 25, 2009

Sling == REST over JCR Wednesday, March 25, 2009

Sling == REST over JCR REST -> Roy T. Fielding scheler JCR: David Nue 2005 rele a 1.0 r v ele ased sed y 162 p 2k +300 pages ages Wednesday, March 25, 2009

Reclaiming the web. Sling URL decomposition. /cars/audi/s4.details.html Wednesday, March 25, 2009

Reclaiming the web. Sling URL decomposition. /cars/audi/s4.details.html Repository Wednesday, March 25, 2009

Reclaiming the web. Sling URL decomposition. /cars/audi/s4.details.html Content Repository epository Path R Wednesday, March 25, 2009

Reclaiming the web. Sling URL decomposition. /cars/audi/s4.details.html Content ...selects a Repository epository Path R particular scrip t Wednesday, March 25, 2009

Sling architecture HTTP debugger ﬁlesystem browser standard custom servlets WebDAV Sling OSGi servlets and components server console javascript resource servlet/script OSGi bundles JSR 223 JSP Ruby resolution resolution scripting OSGi framework Velocity etc.. (Apache Felix) OSGi webapp JSR-170 API JCR repository Wednesday, March 25, 2009

Sling architecture HTTP sling.js debugger ﬁlesystem browser utilit y POST, V json GE T WebDA access standard custom servlets WebDAV Sling OSGi servlets and components server console javascript resource servlet/script OSGi bundles JSR 223 JSP Ruby resolution resolution scripting OSGi framework Velocity etc.. (Apache Felix) OSGi webapp ESP de se r ver-si t ip JSR-170 API javascr JCR repository Wednesday, March 25, 2009

A minimalone .esp script blog Consisting of Sling cat /Volumes/localhost/apps/blog/blog.esp | wc -l 54 Wednesday, March 25, 2009

from e code : ge t th ay.com dev.d url.com/ /tiny 6 ht tp:/ gblog4 slin A minimalone .esp script blog Consisting of Sling cat /Volumes/localhost/apps/blog/blog.esp | wc -l 54 Wednesday, March 25, 2009

Sling POST servlet # POST to Sling curl -F title=hello http://localhost:8888/foo -> 200 OK # GET created node in json format curl http:/ /localhost:8888/foo.tidy.json { quot;jcr:primaryTypequot;: quot;nt:unstructuredquot;, quot;titlequot;: quot;helloquot; } Wednesday, March 25, 2009

Sling POST servlet # POST to Sling curl -F title=hello http://localhost:8888/foo -> 200 OK POST se t e ters s # GET created node in json format param opertie curl http:/ /localhost:8888/foo.tidy.json node pr { quot;jcr:primaryTypequot;: quot;nt:unstructuredquot;, quot;titlequot;: quot;helloquot; } Wednesday, March 25, 2009

blog step 1: create content ! <form method=quot;POSTquot;> ! Title: ! <input type=quot;textquot; name=quot;titlequot; style=quot;width:100%quot;/> ! ! Text: ! <textarea style=quot;width:100%quot; name=quot;textquot;></textarea> ! ! <input type=quot;submitquot; value=quot;savequot;/> ! ! <input type=quot;hiddenquot; name=quot;:redirectquot; value=quot;*quot;/> ! </form> Wednesday, March 25, 2009

blog step 1: create content ! <form method=quot;POSTquot;> ! Title: ! <input type=quot;textquot; name=quot;titlequot; style=quot;width:100%quot;/> ! ! Text: ! <textarea style=quot;width:100%quot; name=quot;textquot;></textarea> ! ! <input type=quot;submitquot; value=quot;savequot;/> ! ! <input type=quot;hiddenquot; name=quot;:redirectquot; value=quot;*quot;/> ! </form> dri ve fields t Form onten the c el mod Wednesday, March 25, 2009

blog step 2: retrieve content <script src=quot;/system/sling.jsquot;></script>! <form method=quot;POSTquot;> ... </form>  <script>Sling.wizard();</script> Wednesday, March 25, 2009

blog step 2: retrieve content <script src=quot;/system/sling.jsquot;></script>! <form method=quot;POSTquot;> ... </form>  <script>Sling.wizard();</script> U(D) Inst ant CR Wednesday, March 25, 2009

blog step 3: navigation <ul> <li> <a href=quot;/content/blog/*quot;> [Create new post]</a> </li> ! <script> ! var posts = Sling.getContent(quot;/content/blogquot;, 2); ! for(var post in posts) { ! ! document.write( quot;<li><a href=’” + post + quot;'>quot; + posts[post].title + quot;</a></li>quot;); ! } ! </script> </ul> Wednesday, March 25, 2009

we got a blog! html form + Sling.wizard() + Sling.getContent() Wednesday, March 25, 2009

The ESP blog sample ESP scripting + java + javascript OSGi bundle, initial content, WebDAV, observation, RAD Wednesday, March 25, 2009

The ESP blog sample ESP scripting + java + javascript OSGi bundle, initial content, WebDAV, observation, RAD mples ng/sa / der sli rl.com de un inyu Co ht tp:/ t logesp / slingb Wednesday, March 25, 2009

ESP blog in action create retrieve thumbnails update Wednesday, March 25, 2009

ESPblog demo Wednesday, March 25, 2009

ESP blog source ﬁles admin.esp pom.xml edit.esp ThumbnailGeneratorService.java html.esp ThumbnailGeneratorServiceImpl.java list.esp espblog.css menu.esp sling-logo.png xml.esp (RSS feed) constants.esp header.esp Wednesday, March 25, 2009

ESP blog source ﬁles admin.esp pom.xml edit.esp ThumbnailGeneratorService.java html.esp ThumbnailGeneratorServiceImpl.java list.esp espblog.css menu.esp sling-logo.png xml.esp (RSS feed) constants.esp source log re s to espb oint header.esp t ype p ripts those sc Wednesday, March 25, 2009

ESP blog content structure JSON dump WebDAV view Wednesday, March 25, 2009

<% ESP blog edit script pageTitle = currentNode.title; load(quot;header.espquot;); %> <body> <form method=quot;POSTquot; action=quot;<%= currentNode %>quot;> <p><label>Title</label> <input name=quot;titlequot; type=quot;textquot; value=quot;<%= currentNode.title %>quot;></p> ... <input type=quot;hiddenquot; name=quot;createdquot;/> <input name=quot;:redirectquot; type=quot;hiddenquot; value=quot;/content/espblog/posts.admin.htmlquot;/> <input type=quot;submitquot; value=quot;Postquot; class=quot;buttonquot;> </form> ... Wednesday, March 25, 2009

ESP blog thumbnails: OSGi service /** * Observe the espblog content for changes, and generate * thumbnails when images are added. * * maven-scr-plugin uses annotations to generate the OSGi * Declarative Services XML conﬁguration ﬁles * @scr.service * @scr.component immediate=quot;truequot; * */ public class ThumbnailGeneratorServiceImpl implements ThumbnailGeneratorService, EventListener { Wednesday, March 25, 2009

ESP blog thumbnails: observation /** @scr.reference (framework injects it automatically) */ private SlingRepository repository; /** called by framework when service is activated */ protected void activate(ComponentContext context) { Session s = repository.loginAdministrative(null); / Listen for nt:ﬁle NODE_ADDED repository events / ObservationManager m = s.getWorkspace().getObservationManager(); ! String[] types = { quot;nt:ﬁlequot; }; ! m.addEventListener( this, Event.NODE_ADDED, contentPath, ...); Wednesday, March 25, 2009

ESP blog thumbnails: NODE_ADDED /** Called by JCR Observation manager for events that this * EventListener registered for */ public void onEvent(EventIterator it) { while (it.hasNext()) { Event event = it.nextEvent(); if (event.getType() == Event.NODE_ADDED && !(event.getPath().contains(quot;thumbnailsquot;))) { String p = event.getPath(); Node n = session.getRootNode().getNode(p); createThumbnails(addedNode); } } ... Wednesday, March 25, 2009

We got a typical Sling application! JCR features: WebDAV, observation, nt:unstructured. Sling goodies: simple script mappings (BYOL), POST servlet, RESTful interface. OSGi bundle, code + initial content, Maven plugins. Wednesday, March 25, 2009

We got a typical Sling application! JCR features: WebDAV, observation, nt:unstructured. Sling goodies: simple script mappings (BYOL), POST servlet, RESTful interface. ource blog s under ESP found es ode is ampl OSGi bundle, code + initial c sling/s content, Maven plugins. Wednesday, March 25, 2009

Where is Sling going? Wednesday, March 25, 2009

Where is Sling going? (aka conclusion) First web framework designed for JCR. Embrace the web, act like a very clever web server! Intelligent HTTP/JSON storage? OSGi, organic app growth. Growing community, graduate in 2009? http://incubator.apache.org/sling http://dev.day.com http://contentcentric.org/ Wednesday, March 25, 2009

Where is Sling going? (aka conclusion) First web framework designed for JCR. Embrace the web, act like a very clever web server! Intelligent HTTP/JSON storage? not a web OSGi, organic app growth. “Sling is s ation a applic k, it’s fram e wor Growing community, graduate ame work” in 2009? w eb f r http://incubator.apache.org/sling http://dev.day.com join t hehttp://contentcentric.org/ fun! Wednesday, March 25, 2009

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Rapid JCR applications development with Sling

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