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In depth presentation on ICEfaces/JSF on GlassFish. Also includes how to JSF 2.0 will apply to ICEfaces
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www.icefaces.org
www.icefaces.org
ICEfaces is…
Easy Ajax for Java developers
ICEfaces is an Ajax framework that allows developers to easily create rich Internet applications (RIA) in pure Java.
• Open source
• Standards-based
• Extends JavaServer Faces
• Develop rich Web Applications in pure Java, not JavaScript
• Integrated with GlassFish and Friends– Provides NetBeans IDE Plugin
• Endorsed migration for Woodstock users
– Supports Ajax Push applications via Grizzly
– Leverages enterprise capabilities of GlassFish• Security, Scalability: Clustering, Load Balancing and Failover
– Integrates with 3rd Party frameworks and middleware• WebSpace, WebStack
www.icefaces.org
Agenda
• Ajax Push Overview
• Application Programming Basics
• On the Wire
• Code Walkthrough
• Asynchronous Request Processing
• Security
• Custom Components (JSF 1.2 and JSF 2.0)
• JSF 2.0 Ajax
• JSF 2.0 Notable Enhancements
• Summary
www.icefaces.org
Multi-user AuctionMonitor
www.icefaces.org
Multi-user AuctionMonitor
www.icefaces.org
Multi-user AuctionMonitor
www.icefaces.org
Multi-user Locking
Ted selects record for editing
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Multi-user Locking
Joe selects same record, requests lock
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Multi-user Locking
Ted responds, and accepts or denies
www.icefaces.org
Push in Portlets
Portal page with three portlets
www.icefaces.org
Push in Portlets
Joe searches for a city
www.icefaces.org
Push in Portlets
All three portlets are updated
www.icefaces.org
Ajax Push Illustrated
Ted
Deryk
Server
www.icefaces.org
Ajax Push Illustrated
Ted
Deryk
Server
AjaxRequest
www.icefaces.org
Server
Ajax Push Illustrated
Ted
Deryk
JSF Lifecycle +DOM diff
www.icefaces.org
Ajax Push Illustrated
AjaxResponse
Deryk
Server
AjaxPush
Ted
www.icefaces.org
What is Ajax Push For?
• Distance learning• Collaborative authoring• Auctions• Shared WebDAV filesystem• Blogging and reader comments• SIP-coordinated mobile applications• Hybrid chat/email/discussion forums• Customer assistance on sales/support pages• Multi-step business process made collaborative• Shared trip planner or restaurant selector with maps• Shared calendar, “to do” list, project plan• Games• Enterprise shared record locking and negotiation
www.icefaces.org
Ajax Programming, Ideally.
public class PageBean { String message;
public String getMessage() { return message; }
public void setMessage(String message) { this.message = message; }
}
<f:view xmlns:f=“http://java.sun.com/jsf/core” xmlns:h="http://java.sun.com/jsf/html“ >
<html> <body> <h:form> <h:inputText value=“#{pageBean.message}” /> </h:form> </body> </html>
</f:view>
Presentation Model Declarative User Interface
PageBean.java Page.xhtml
www.icefaces.org
Ajax Push Programming
presentation.setSlide(7);SessionRenderer.render(“GlassFishTV”);
Asynchronously and elsewhere in the application ...
To keep track of groups of users:
SessionRenderer.addCurrentSession(“GlassFishTV”);
www.icefaces.org
Ajax Push Techniques
• Poll– send a request to the server
at some interval– response is “empty” if there is
no update
• Http Streaming– send a request and wait for
response– write “endless” response in
chunks
• Long Poll – send a request to the server
and wait for response– indistinguishable from “slow”
server
www.icefaces.org
Long Polling over HTTP
GET /auctionMonitor/block/receive-updates?icefacesID=1209765435 HTTP/1.1Accept: */*Cookie: JSESSIONID=75CF2BF3E03F0F9C6D2E8EFE1A6884F4Connection: keep-aliveHost: vorlon.ice:18080
www.icefaces.org
Long Polling over HTTP
GET /auctionMonitor/block/receive-updates?icefacesID=1209765435 HTTP/1.1Accept: */*Cookie: JSESSIONID=75CF2BF3E03F0F9C6D2E8EFE1A6884F4Connection: keep-aliveHost: vorlon.ice:18080
Chat message “Howdy”
www.icefaces.org
Long Polling over HTTP
GET /auctionMonitor/block/receive-updates?icefacesID=1209765435 HTTP/1.1Accept: */*Cookie: JSESSIONID=75CF2BF3E03F0F9C6D2E8EFE1A6884F4Connection: keep-aliveHost: vorlon.ice:18080
Chat message “Howdy”
HTTP/1.1 200 OKContent-Type: text/xml;charset=UTF-8Content-Length: 180Date: Tue, 10 Mar 2009 22:49:49 GMTServer: Sun Java System Application Server 9.1_01
<updates> <update address="_id0:_id5:0:chatText"> <span id="_id0:_id5:0:chatText">Howdy</span> </update></updates>
www.icefaces.org
webmc.jspx
<f:view xmlns:f="http://java.sun.com/jsf/core" xmlns:h="http://java.sun.com/jsf/html"><html> <head> <title>WebMC</title> </head> <body> <h3>WebMC</h3> <h:form> <h:panelGrid columns="1"> <h:outputText value="Presentation"/> <h:graphicImage value="#{user.slideURL}"/> </h:panelGrid> <h:panelGrid columns="1" > <h:outputText value="Chat"/> <h:outputText value="#{user.chatLog}"/> <h:inputText value="#{user.chatInput}"/> <h:commandButton actionListener="#{user.submit}"/> </h:panelGrid>
www.icefaces.org
UserBean.javapublic class UserBean {
public String getSlideURL() { return slideURL; }
public String getChatLog() { return chatLog; }
public String getChatInput() { return chatInput; }
public void setChatInput(String text) { chatInput = text; append(chatLog, text); }}
Set by presentation moderator slide controls
www.icefaces.org
UserBean.java (Ajax Push)
import com.icesoft.faces.async.render.SessionRenderer;
public class UserBean { String presentationName;
public UserBean() { presentationName = LoginBean.getPresentationName(); SessionRenderer.addCurrentSession(presentationName); }
public void submit() { SessionRenderer.render(presentationName); }}
www.icefaces.org
• Automatic Ajax updates
• No JavaScript Development
• Easy Ajax Component Suite
– No JavaScript component wiring
– No manually defined update regions
• Ajax transport handled by ICEfaces
• Woodstock conversion: utilities and compatible components
• ---
– Asynchronous application-driven browser updates
– All 50+ components are Ajax Push aware
Ajax Components with ICEfaces
www.icefaces.org
A Thread for Every Client?
• Blocking requests with Servlet 2.5 consumes threads
• GlassFish/Grizzly, Tomcat 6, Jetty, and Servlet 3.0 provide asynchronous request processing
• Many connections handled with a small thread pool
www.icefaces.org
GlassFishSuspend with Grizzly.
CometContext context = CometEngine.getEngine().register(contextPath); context.setExpirationDelay(20 * 1000); SuspendableHandler handler = new SuspendableHandler(); handler.attach(response); cometContext.addCometHandler(handler);
class SuspendableHandler implements CometHandler { public void onEvent(CometEvent event) { response.getWriter().println(event.attachment()); cometContext.resumeCometHandler(this);}
presentation.setSlide(7);cometContext.notify(message);
Asynchronously and elsewhere in the application ...
www.icefaces.org
Multiple Applications and Browser Connection Limits
ICEfacesApplication
Ajax PushServer
Glassfish
Asyn
chro
nous
Con
nect
ions
ICEfacesApplicationJMS
Grizzly
http:// host / ajaxpush /
www.icefaces.org
Security for Ajax Push
• Build security in layers– Java– JavaServer Faces– SSL
• Script injection– JavaScript– SQL
• Cross-site request forgery• Cross-site scripting
www.icefaces.org
Custom Components (JSF 1.2)
• Implement MyComponent.java extending UIInput
• Implement MyComponentRenderer.java
• Implement MyComponentTag.java
• Add component and renderer to faces-config.xml
• Add MyComponentTag to TLD
www.icefaces.org
Facelets in JSF 2
• Facelets now part of JSF standard
• Also know as the Page Declaration Language (PDL)
• First non-JSP PDL designed for JSF
• Some differences from JSP:– Pages compiled to abstract structure
– Builds JSF component view when executed
– Don't need TLD for tag attributes
– Page templating
• Opens the door for easier component development
www.icefaces.org
Custom Components in JSF 2
• Components built via markup templates
• Also known as composite components
• Composite Component: any Facelet markup file that resides in a resource library
• Custom components can also be developed in Java as per JSF 1.2
www.icefaces.org
Custom Components in JSF 2 (Use)
www.icefaces.org
Custom Components in JSF 2 (Definition)
www.icefaces.org
Ajax in JSF 2.0
• Resource Delivery Mechanism
• Partial View Processing
• Partial View Rendering
• Ajax Client/Server
• Ajax Enabled Components
In JSF 2.0 Spec
In Component Library
www.icefaces.org
Ajax in JSF 2
Restore View
Process Validations
Update Model Values
Ajax Request
execute:4,5
Execute Portion
Partial View Processing
Apply Request Values
InvokeApplication
RenderResponse1
2 3
544 5
www.icefaces.org
Ajax in JSF 2
Restore View
Process Validations
Update Model Values
Ajax Request
render:4,5
Partial View Rendering
Apply Request Values
InvokeApplication
RenderResponse
Render Portion
1
2 3
544 5
www.icefaces.org
Ajax in JSF 2
• Standard JavaScript API– jsf.ajax.request, jsf.ajax.response– jsf.ajax.addOnError, jsf.ajax.addOnEvent– jsf.getProjectStage, jsf.getViewState
• Standard Response Format– XML based– “instruction set” for:
– updating DOM, attribute changes, script execution– inserting into DOM, deleting DOM nodes, extensions
• Standard Subtree Execution and Rendering– frameworks may also plug in their own traversal strategy
• Declarative Ajax (f:ajax)• Net result is Ajax component interoperability
www.icefaces.org
Enhancements in JSF 2
• System Events– Represent specific points in time for a JSF application– For example, listen for:
– when a component was added to parent– when a component is about to be rendered
– Listeners implement javax.faces.event.SystemEventListener
• “view” scope– allows attributes to be associated with a view– attributes persist until a new view is navigated to– can be accessed via EL (like request or session)
• Annotations– An alternative to XML configuration– @FacesComponent, @FacesConverter, @ManagedBean– @RequestScoped, @SessionScoped, @ApplicationScoped
www.icefaces.org
Enhancements in JSF 2
• Resources– Facility for serving resources (CSS, JavaScript, images, etc..)– Can be packaged under web application
– Under “resources” directory– Or into classpath under META-INF/resources
– Typically reside in libraries– Resources can be versioned
• Exceptions– Exception handling facility allows queuing of exceptions– Also leverages System Event facility– publish ExceptionEvent(s); subscribe to ExceptionEvent(s)
www.icefaces.orgICESOFT TECHNOLOGIES INC. www.icefaces.org
SummaryThe Asynchronous Web Revolution is Now
• Ajax Push will revolutionize human interaction
• Ajax Push is the key to enterprise collaboration for the Web
• JSF 2.0 is the language for developing web applications
• Ajax Push can scale on GlassFish with Asynchronous Request Processing
• ICEfaces provides the high-level capabilities for enterprise collaboration features in your application
www.icefaces.org44
Thank You
Contact Us:Toll Free: +1 877 263 3822 USAInternational: +1 403 663 3322product.support@icesoft.com
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