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S OFTWARE D EVELOPMENT T RENDS 2010

Contact Details Charalampos Arapidis [email_address] OTS S.A. Employee Senior Software Developer

Past Trends that failed to pick up Java FX – epic fail Sun’s software platform for creating RIAs OOXML – global fail Office Open XML file format

Trends in 2010 Agile Project Management + OSS eGif eGovernment Interoperability Framework Web Applications – HTML 5

Agile and OSS Is Agile a trend? Open Source Software: maturity and stability Agile principles, benefits, adoption rate increase Flexible OSS enables better agile implementation

Characteristics of the Agile Methodology Based on iterative development Emphasizes on building releasable software in short time periods The project undergoes frequent inspection and adaptation Customer collaboration – requirements’ changes are expected and welcomed. Continuous delivery of working software Constant communication between members of a self-organized team Regular adaptation to changing circumstances

Agile Manifesto The Four Values of Agile Individuals and interactions over processes and tools Working software over comprehensive documentation Customer collaboration over contract negotiation Responding to change over following a plan

Why Agile Delivers Business value early – stakeholders are happy Reactive and adaptive to changes in requirements Responsiveness to changing needs and understanding Predictable reliable results Greater communication and interaction among team members improves skill building Mature and open source Project Management Tools

6 Dimensions of Economic & Organizational ROI ( these SHOULD be Measured ) Improved Efficiency due to optimized process Higher Productivity due to improved morale Cost Control due to Superior On-Time Performance Higher Quality due to improved Defect Removal Benefit Improvement due to Integral Customer Feedback Benefit Acceleration due to Incremental Delivery

AN AGILE TEAM IN A NON-AGILE ENVIRONMENT WILL NOT SURVIVE

Conclusion Agile: a misunderstood methodology Companies ready to give up Command-and-Control for Agile teams Flexible OSS makes easier to follow Agile practices

eG overnment I nteroperability F ramework Today’s Information Age offers the possibility of communication across borders. The need to standardise and allow for interoperability is growing. IDABC stands for I nteroperable D elivery of European eGovernment Services to public Administrations , Businesses and Citizens . The European Interoperability Framework supports the European Union's strategy of providing user-centred eGovernment services by facilitating, at a pan-European level, the interoperability of services and systems

eG overnment I nteroperability F ramework What is eGif Basic principles and standards of the framework Modeling government’s infrastructure O.T.S. Case Study

eGif A common platform for developing services An effort to standardize the way e-Services are implemented in order to enable interoperability and communication. Semantic representation of the Government’s Authorities at service and data level. Basic Principles Reusablity Flexibility Standards Security

Standards of the eGif XML Signature XML-Dsig & Encryption Public Key Infrastructure ( PKI ) BPEL UML 2.0 XSD XML XSLT – W3C WSDL + SOAP

Modeling produces Common Language Each European state registers by priority physical services and forms exposed to the Citizen. The real world interaction between the Citizen and the Government’s Organizations translates to : Business Objects ( Business Information Entities ) Activity Diagrams Data Models ( xsd schemas ) Metadata ( approved Data Types and Codelists )

How the components connect and relate to the xsd and xml schemas.

Core Components & Business Information Entities example

Marital status Codelist <xs:simpleType name="MaritalConditionCodeContentType"> <xs:restriction base="xs:token"> <xs:enumeration value="1"> <xs:annotation> <xs:documentation xml:lang="eng"> <ccts:Name>Single</ccts:Name> </xs:documentation> <xs:documentation xml:lang="ell"> <ccts:Name>Άγαμος, Ανύπανδρος</ccts:Name> </xs:documentation> </xs:annotation> </xs:enumeration> <xs:enumeration value="2"> <xs:annotation> <xs:documentation xml:lang="eng"> <ccts:Name>Married</ccts:Name> </xs:documentation> <xs:documentation xml:lang="ell"> <ccts:Name>Έγγαμος, Παντρεμένος</ccts:Name> </xs:documentation> </xs:annotation> </xs:enumeration> .. </xs:simpleType>

Real use case: The Coverletter The cover letter communicated between two (or more) public authorities regarding an issue of common interest or that mutually affects them.

Coverletter : root of the xsd schema

The Services The services communicate using SOAP messages. The XML data of the messages validate against the xsd schemas to ensure data integrity and validity.

Conclusion eGif – a complete global framework A Paradigm for reusability and standardization Not for eGovernment services only Provides a solid ground for any project

HTML 5.0 Aim of the new spec. Is it necessary? What happened in 2009? Participants and Supporters Features and Components

What happened in 2009 Google gears up for HTML 5 Mozilla Firefox 3.5 has been released with HTML 5 support Microsoft joins HTML 5 standard

HTML 5.0 the proposed next standard for HTML 4.01, XHTML 1.0 HTML5 aims to reduce the need for proprietary plug-in-based rich Internet application (RIA) technologies such as Adobe Flash , Microsoft Silverlight , and Sun JavaFX .

WHATWG : Web Hypertext Application Technology Working Group The specification is an ongoing work The specification’s draft became final as of October 2009 Incorporates Web Forms 2.0 spec Main editors of the spec: Google & Apple

How it all started Need for complex and rich interfaces Presentational elements deprecated Emphasis on the importance of DOM Scripting in Web Behavior Introduction of new elements – semantic replacements for generic and meaningless tags

Some of the new features Offline Storage – cookies at a whole new level Document – region editing Management of the browser history – the Back button was always a big problem. Elements: drag’n’drop, calendar, progress, section, header etc

Google’s VP states: "we're betting big on HTML 5."

Current Browser Support implemented or emulated

Advanced features Application caches: the developer can declare which resources the browser to cache – better control over caching, less bandwidth “wasted” – ability to “save” application locally and run offline. Client-side Javascript database support : easy to build offline apps 10mb local storage Web Workers: Background Threading mechanisms available to the browser – 10x faster execution.

Features Real apps in the browser . APIs for in-browser editing, drag and drop, back button “waypoints,” and other graphical user interface abilities – calendar, progressbar etc. Content presentation tags will be phased out , we have CSS for this Rich animations without plug-ins. The canvas element gives the browser the ability to draw vector graphics . This means configurable, automatic graphs and illustrations right in the browser without Flash or Silverlight. Some support for canvas is already in all the latest browsers except for IE

Features Localized databases . This feature, when implemented, automatically embeds a local SQL database websites can read and write to, speeding up interactive searching , cacheing and indexing functions, or for offline use of web apps that rely on data requests. A new, sensible tagging strategy. Instead of bundling all multimedia into object or embed tags, video goes in video tags . Audio goes in audio tags, and so on.

The canvas element it is not an image, it is a vector

Progress element <progress value="250"max="1000">

Creates an autocomplete input field! <input type="text" name="favCharacter" list="characters"> <datalist id="characters"> <option value="Homer Simpson"> <option value="Bart"> <option value="Fred Flinstone"> </datalist> </input> Datalist

Datagrid In a datagrid, data is structured as a set of rows representing a tree, each row being split into a number of columns. Enables row selection and selection model e.g. multiple="multiple" means user can select multiple rows And supports all global HTML 5 attributes such as contetneditable contextmenu draggable etc..

Experimental Appliances Youtube built entirely in HTML 5 – ( no flash ) Offline Gmail in mobile browser

HTML 5 : Good news for the developer

JSF – HTML Date selector Autocomplete input field

Date Selector JSF The component is not implemented Extend UIInput Create new tag and taghandler Implement the renderer and the encode-decode methods – ( localization ) Inject and cache necessary javascript and css files – ( bandwidth ) Test test test HTML The component is built in the browser UI is implemented by the browser following the spec Automatic locale detection or Retrieve from the offline storage No bandwidth loss

Autocomplete input field Autocomplete + much data = bad user experience No need for arcane javascript and weird css, It is the browser’s responsibility to create the UI Suggestion values can be stored offline and observed Reduce / nullify application server and DB hits

Conclusion Designed with Web Apps in mind Backed up by major software companies Not another abstract W3C spec Holy Grail of Web Authoring?

Other trends jQuery: write less do more JSF 2: ajax enabled, components composition J2EE6: Bean Validation, CDI, Servlet 3

EOF More companies adopt Agile, use OSS to apply best practices Promotion to establish the concept of interoperable systems at pan-European level HTML 5 spec targets Web Applications with user experience and ease of development being top priorities

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