Download pdf - PLAT-7 Spring Web Scripts and Spring Surf

Spring Surf & Web Scripts!

Dave Draper – UI Engineer - @_DaveDraper!

2007 • Alfresco 2.0 introduces first REST API (early WebScripts concepts)!• Alfresco 2.1 introduces WebScripts!

• REST framework, JSR-311 (Jax-RS) URI Index!• Scriptable controllers (or backed by Spring Java Beans)!• FreeMarker template output (or Java output stream)!

2008 • Alfresco Web Framework demo-ware (model objects, JSP, FTL)!• Alfresco Page Render (WebScripts as components on a page)!• Combined, productised and renamed to Surf!• Alfresco Share 3.0, 3.1 – Alfresco collaboration and DM – modern XHTML and Ajax based interface!

History lesson...

Early 2009 • Alfresco Share 3.2!• First contact between Alfresco and Spring Source!

Late 2009 • Alfresco Surf and WebScripts integrated with Spring MVC!• Alfresco Surf and WebScripts contributed as Spring Extension – Spring WebScripts and Spring Surf!

• Alfresco Share 3.3 – refactored onto Spring WebScripts and Spring Surf!!

2010 • 3 Milestones and RC1 release!• Alfresco Share 3.4 – using SpringSurf RC1!

History lesson (cont)...

2011 • Alfresco Team!• New extensibility capabilities added!• Version 1.0.0 releases!• Alfresco Share 4.0!

History lesson (cont)...

What Are WebScripts? • Services bound to a URIs which respond to HTTP methods such as GET, POST, PUT and DELETE!

• Support multiple formats (HTML, JSON & XML)!• A framework for creating a REST API!• Made up of descriptor, controller, properties, configuration and presentation files!

WebScripts!• Descriptor (XML) • Controller (JavaScript/Java Spring Bean) • Response Formats (FreeMarker) • I18N properties (Text) • Configuration (XML)

Response Formats!•  Available formats

• HTML!• Text!• XML!• ATOM!• RSS!• JSON!

•  Set default in Descriptor (if more than one available) •  Request by:

• Extension (e.g. /script1.html, /script1.json, etc)!• Format request parameter (e.g. /script1?format=xml)!

Why Use Web Scripts? •  Rapid development (no server restarts) •  Separation of concerns (MVC) •  Localization •  Extensibility •  FreeMarker and JavaScript

But What Is Spring Surf ? •  An extension to Spring MVC •  A set of controllers, resolvers and views •  A way of breaking an HTML page into re-

usable composite parts •  An interface to the Alfresco Repository •  The framework that underpins Alfresco

Share

Example Spring Surf Objects •  Pages •  Template Instances •  Regions •  Chrome •  Components •  Sub-Components

Page Template-‐Instance

Region-‐Chrome Region Component Chrome

Component Sub-‐

Components

Mistakes were made… •  Chrome •  Scopes •  No Component nesting •  1-1 Region/Component binding •  Spring Roo •  Tools •  Difficult to match output to source

…but there is lots of good stuff ! •  Themes •  Model Object stores (file system, classpath, remote,

etc) •  Presets / object creation •  URI templates •  Remote connections •  Authentication •  Extensibility •  Endlessly configurable

What can you do with it? • Rapid web-tier view composition – Spring MVC View Resolver!

• FreeMarker, JSP, Groovy, PHP pages!• WebScript, FTL, JSP, Groovy, PHP components!• Simple JavaScript, Groovy controllers!• Remote API – REST request/response processing!

• WebScripts – standalone REST API tier!• Portlets!

What you SHOULD do with it?!

• Customize Alfresco Share!• Use WebScripts and FreeMarker!• Use JavaScript controllers!• Use Endpoints to contact an Alfresco Repository in standalone applications!

SOME USEFUL INFORMATION!

WebScript and Surf Object lookup!

Authentication (WebScripts & Surf Pages)!

• Use <authentication> element • Available types:

• “none”!• “guest”!• “user”!• “admin”!

•  Authenticates against Alfresco Repository •  Can use “runas” property with WebScripts only

URI Templates (WebScripts)!

•  Use tokens in URL • e.g. “/x/{token1}/y/{token2}/z”!

•  Can define multiple URLs in single descriptor •  Use “url.templateArgs” to access

• ${url.templateArgs.token1}!

URI Templates (Surf Pages)!

•  Define “uri-template” in <alfresco-config> (e.g. “share-config-custom.xml) • Include {pageid} token for Page mapping!• Or ensure Page exists (e.g. Created through Preset)!

•  Use page.url.templateArgs to access tokens • e.g. ${page.url.templateArgs.token1}!

Surf Configuration!

•  Configuration object • Site home page!• Site theme!

•  Surf.xml • Object type implementations (e.g. AdvancedComponent)!• User factories!• Site configuration!• Chrome!• Page type (e.g. Login)!• Module Deployment!

•  Spring Application Context • Services (configuration loading, user factories, persistence, remote access, etc)!• Controllers (login controllers, etc)!• Interceptors!

Custom Home Page!

•  From: http://blogs.alfresco.com/wp/ddraper/2011/11/01/advanced-share-customization-part-1/

•  Optionally override <site-configuration> in “surf.xml” • Default is “slingshot.site.configuration”!

•  Set <root-page> property in Configuration object

Custom Login Page!

•  From: http://blogs.alfresco.com/wp/ddraper/2011/11/03/advanced-share-customization-part-2/

•  Create Page and Template-Instance objects for custom login page

•  Define new default “login” Page-Type object

Regions and Components •  Regions define location into which Components can

be bound •  Binding done through region-id, source-id and

scope o  Forced 1-1 bindings o  Flawed concept for Component switching

•  Sub-Components introduced as a workaround •  Components SHOULD use ComponentType or

Processor but are “optimized” to use WebScript URL

• Connectors & Authenticators!• XML configure access to “endpoints” – obtained by id!

• Access HTTP methods through JavaScript controller or Ajax via proxy controller!

• Endpoints hide the URL stem from scripts – authentication encapsulated by connectors and authenticators!

• Connect to multiple REST sources; alfresco, wiki, search!

Remote API

Remote API – Example!var conn = remote.connect("alfresco"); var json = conn.get("/api/products/" + args.filter); if (json.status == 200) { // Create JavaScript objects from the response var obj = eval('(' + json + ')'); if (obj) { // Perform processing on the js objects // set results into the model for the template model.results = somearray; } }

• Persisters – read model object definitions from classpath, WEB-INF, JARs!

• Alfresco legacy locations and Spring “friendly” locations!o Migration of Alfresco Surf 3.2 apps!o New locations require less files, folders!

• Read and write to remote location and local file system!

• Example - Alfresco Share stores pages and components for dynamic dashboards in the repository!

Model Object Stores

Component .head.ftl template!

<link rel="stylesheet" type="text/css" href="${page.url.context}/products/products.css" />

<script src="${page.url.context}/products/products.js"></script>

•  Allow WebScripts to add JavaScript and CSS dependencies into HTML <head>

•  Use ${head} in Template Instance to output dependencies into <head>

•  Use <@script> to automatically switch between .js and –min.js

Useful Runtime Tools

•  /service/index o  Browse WebScripts

o  WebScript refresh

o  SurfBug toggle

Roadmap!

•  Forking from Spring back into Alfresco • Continued development (more extensibility

features, performance improvements) • Continued use in Alfresco projects • More blogging, forums and documentation

How do I use it?!

• You CAN SVN checkout, maven build: https://src.springframework.org/svn/se-surf/trunk!

• You SHOULD use Alfresco Community JARs when available!

Learn More!

• Blog posts: • http://blogs.alfresco.com/wp/ewinlof/!• http://blogs.alfresco.com/wp/kevinr/!• http://blogs.alfresco.com/wp/ddraper/!• http://mindthegab.com/!

• Alfresco Forum: “Surf Development”

Questions?!