AJAX Impact on Telecom
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Transcript of AJAX Impact on Telecom
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So what is AJAX?
• Asynchronous JavaScript and XML– Refers to a programming model in which the user Interface is driven by data
instead of “pages”
– DOM manipulation is used to update UI components
– Sites and applications are more responsive
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Technical Impact of AJAX on the Web
• Advantages– Application skeleton only downloaded once
– Can result in significant reduction in bandwidth
– Asynchronous requests allow browser to be more responsive
– Page transitions are eliminated resulting in less "flicker"
• Disadvantages– Applications become more chatty
– Harder to develop
– Breaks the back button
– Impacts “bookmarkability”
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Technical Impact of AJAX on Telecom
• Advantages– Application skeleton only downloaded once
– Can result in significant reduction in bandwidth
– Asynchronous requests allow browser to be more responsive
– Page transitions are eliminated resulting in less "flicker"
• Disadvantages– Applications become more chatty
– Harder to develop
– Breaks the back button
– Impacts “bookmarkability”
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Sure, Voice Browsers have needs too!
• VoiceXML and CCXML engines are browsers• Governed by the W3C• Based on proven web standards/techniques
– Open protocols (HTTP, SSL)
– Request-response model
– HTTP 1.1 Caching
– Intelligent resource pre-fetching
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VoiceXML
• Used to create interactive Voice Dialogs• VoiceXML : Speech :: HTML : Web• AJAX-style development via the <data> element• Uses ECMAScript as it's primary scripting language
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Demo Overview
• What did we cover?– VUI downloaded once per call instead of once per lookup
– Scores loaded “on-the-fly” using a custom Web Service
– Audio files are cached via standard HTTP caching headers
• Wait, but was that asynchronous?– No, VoiceXML is effectively a procedural language
– To do true AJAX we need an event/callback model
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Enter CCXML...
• A complementary standard to VoiceXML• Completely asynchronous!• Allows interaction with low level signaling (i.e. SIP)• A container for VoiceXML Dialogs• Loves ECMAScript!
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Thanks to the ITP Program at NYU for the idea: http://itp.nyu.edu/itp/
Demo
Demo: “Your clicks are important to
us”
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Demo Overview
• What did we cover?– Asynchronous event processing
– CCXML was able to send and receive messages from an external source
– We leveraged several open source JavaScript libraries in a way it’s authors may have never imagined!
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But don’t stop there!
• AJAX is not just about performance!– The emergence of AJAX brought on a landslide of innovation that has
fundamentally changed the way we approach software delivery (e.g. Software as a Service)
– AJAX requires that developers separate their UI from the underlying data; maximizing code reuse
– Massive online social networks and countless Internet superstars owe their beginnings to this new development paradigm
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Social Impact of AJAX
• Service Oriented Architectures (SOA)• Mass adoption Open Standards• Free services funded by advertising• Faster ECMAScript Engines!!!