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Oracle Development: JDeveloper 10G - Java, J2EE, EJB, MVC, XML - Overview For Programmer

In 2004 Oracle, Inc. made its new step toward J2EE application development simplification, releasing new RAD Oracle JDeveloper 10G. First of all JDeveloper 10G is targeted to rapid web application building, utilizing all the achievements of J2EE World: web service, EJB, MVC frameworks, XML, etc. Oracle JDeveloper 10G allows you to conduct all full development cycle for complex system – from UML diagram-based concept to debugging, profiling and deployment.

Let’s look at the product main features а:

1. Cross-platform (works under main Unix/Linux platforms and in Microsoft Windows environment) friendly development environment with high level of integration and third party plug-ins switching on. Syntax highlighting, re-factoring, transparent work with RDBMS, bi-directional code generation between UML models, EJB models, required J2EE patterns generation with one click of the button, visual web application builders and other capabilities open the doors for developer, who had never before being dreaming to create industrial-strength J2EE application!

2. PL/SQL stored procedures development and testing, plus integration with major database platforms – Oracle, Sybase, MS SQL Server etc. via JDBC mechanism.

3. Deployment capability for all major application servers – Oracle Application Server, IBM WebSphere, BEA WebLogic, JBoss. OC4J – J2EE container comes with this environment, which perfectly fits for application development and testing.

4. Oracle JDeveloper 10G provides possibility to realize persistent layer for applications on the ADF component base, EJB components or O/R Mapper – TopLink, which is also included.

5. Team Development feature with interoperability with major VCS systems – CVS, Rational ClearCase, Oracle SCM

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6. Oracle JDeveloper 10G unique feature is utilization of Oracle ADF (Application Developer Framework) – MVC realization, enabling rapid J2EE application development. View Layer makes it possible to build applications for data exposure as for thin clients, based on web browser viewing, as well as for rich client and even wireless. Controller Layer is built on Jakarta Apache project platform – popular Open Source framework Struts. Business Components Layer may be realized with various technologies - Java POJO, Oracle ADF Components, WebServices, EJB or Oracle TopLink Objects

7. At this moment (December 2004) Oracle is testing new version - Oracle JDeveloper 10g (10.1.3) Developer Preview. The new features of this new version will be completely redesigned user interface, additional re-factoring capabilities, advanced UML diagrams features, web services simplified creation, support for the web application building on Java Server Faces base, complete support for J2EE 1.4 specification, ADF Faces – JSF components and others.

8. You can get production and developer preview for Oracle JDeveloper 10G here http://www.oracle.com/technology/products/jdev/index.html

Happy developing, customizing, implementing and modifying! If you want us to do the job - give us a call 1-866-528-0577 or 1-630-961-5918! help@albaspectrum.com

About the Writer of this Article

Boris Makushkin is Lead Software Developer in Alba Spectrum Technologies – USA nationwide Oracle, Navision, Microsoft CRM, Microsoft Great Plains customization company, serving Chicago, California, Arizona, Colorado, Texas, Georgia, Florida, Canada, Australia, UK, Russia, Europe and internationally ( http://www.albaspectrum.com ), he is Oracle, Unix, Microsoft CRM SDK, Navision, C#, VB.Net, SQL developer.

XML Parser and Their Types

XML parser is a software module to read documents and a means to provide access to their content. XML parser generates a structured tree to return the results to the browser. An XML parser is similar to a processor that determines the structure and properties of the data. An XML parser can read a XML document to create an output to generate a display form. There are a number of parsers available and a few of them are listed below:

The Xerces Java Parser

The main applications of the Xerces Java parser is the building up of the XML-savvy web servers and to ensure the integrity of e-business data expressed in XML.

expat XML parser

The expat XML parser is written in C and runs on UNIX or W32.The expat XML parser is not a validating processor that is you can use it only to write an XML parser. This parser is contributed by James Clark.

XP and XT

XP is a Java based, XML validating parser and XT is an XSL processor. Both are written in Java.XP detects all non well formed documents. It gives high performance and aims to be the fastest conformant XML parser in Java. On the other hand XT is a set of tools for building program transformation systems. The tools include pretty printing; bundling of systems, tree transformation etc,

SAX

Simple API for XML (SAX) was developed by the members of a public mailing list (XML-DEV).It gives an event based approach to XML parsing. It means that instead of going from node to node, it goes from event to event. SAX is an event driven interface. Events include XML tag, detecting errors etc,

XML pull parser

It is optimal for applications that require fast and a small XML parser. It should be used when all the process has to be performed quickly and efficiently to input elements.

XML parser for Java

It runs on any platform where there is Java virtual machine. It is sometimes called XML4J.It has an interface which allows you to take a string of XML formatted text, pick the XML tags and use them to extract the tagged information.

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Visit http://www.xml-training-guide.com for a complete introduction to XML programming. Learn XML, DTD, Schema, XSLT, Soap and other related technologies. To access online version of the above article, go to http://www.xml-training-guide.com/xml-parser.html
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What Is This RSS, XML, RDF, and Atom Business?

It's been a long day at work and you're in no mood to cook dinner or go out. Time to count on the reliable pizza delivery guy. The order is called in and he promptly arrives with smokin' hot pizza within 30 minutes as promised. If it were only that easy with a picky family where no one can agree on the same restaurant for dinner. One wants Mexican, another wants Chinese, and another wants a burger and Mexican. Instead of running to three different places, you call a delivery service that goes to all of them and brings it to you. What could be easier in getting a meal without cooking it or fetching it?

Free RSS Feeds Directory
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RSS, XML, RDF, and Atom are the food delivery guy of the Internet. The content they deliver is mixed and cooked elsewhere on the Internet just like the meal isn't made on your door step and the acronym fellows bring the content to you via software or an online application. Instead of trying to remember all the places where you like to go to get the latest news, it all comes to you once you order your food.

Click on any of those orange or blue RSS, XML, or RDF buttons and you see unreadable text. Some of it is readable, but reading between the is slow and difficult. In this case, you've got the raw ingredients of the content known as a feed. To make it easily readable, download a feed reader that can interpret (aggregate) the ingredients or sign up for an online service that can do the same.

When the software or application is ready to go, click on the orange or blue button (or "Syndicate This Page," or whatever is along these lines) and copy the resulting URL from the address box. Paste it into the application to cook the ingredients where it's delivered to you ready for your enjoyment.

Syndication is a not a new concept on the Internet, but it’s growing in popularity as more Web sites and newsletters are churning content to turn it into syndicated files, which are fed into an aggregator. Think of it as the content that's ready to travel anywhere it needs to go. Grab the feed and feed it to the aggregator, another way of bookmarking (or creating a favorite) a site because you wish to come back again another time. But how often did you go back to the site through your bookmarks / favorites?

Instead of schlepping from site to site in search of information, I have it all in front of me via the aggregator. The feeds are sorted in folders by topic for easy finding. If I'm writing about the latest virus or worm, then I open the security folder with the security-related feeds and scan them. Scanning content through aggregators is easier than on a Web site because it's in one folder with headlines and maybe a short summary. On a Web site, you're only getting the benefit of that site's news and no where else. The folder has news from over ten resources including blogs, news sites, and newsletters.

Any content can be syndicated. It's a matter of having the backend process in place, which is dependent on the application used for managing the content. If a site doesn't have such resources, then there is software for entering content to create a file with the feed for posting on the site.

Most aggregators have exporting capabilities so the feed can be shared with others interested in the same topic. If you're interested in my security feeds, I can export them into, in most cases, an OPML file and you can import it into your aggregator.

Spam filters are preventing readers from getting newsletters or they get lost in the spam pool. Offering a feed for the newsletter is a compromise. Readers can get the content, only instead of it coming to the emailbox, it comes through the aggregator. It's a way around spam. Like everything else, it has its advantages and disadvantages:

Advantages:

  • Filters can't stop the newsletter from reaching its destination.
  • The recipient will get it - if the server is down, it'll download next time and email can get lost.
  • The feed can be syndicated providing more exposure for your content.

Disadvantages:

  • Rely on readers to open aggregators like they open email client, but some aggregators are built-in with an email client like NewsGator and there are online aggregators like Bloglines, which can be your home page.
  • Metrics won't be as complete, but it's still there through the links.
  • Not as pretty as HTML-based newsletters.

If the feed is automatically created, what have you got to lose? You're providing another way for your readers to get your content just like you can get pizza in different ways: go to the restaurant, have it delivered, or make it at home. More applications are adding syndication capabilities, which make the process effortless. Some have said they won’t read something unless it has a feed.

Syndication works better than bookmarks. With bookmarks, you click on a site that might have the security information and arrive there to find it doesn't. So, back to the bookmarks to click on another site. Lather, rinse, repeat. With aggregators, there is no jumping from site to site. Scan the headlines right there until you find what you need.

There was a time when we didn't have the option to have pizza delivered to our doorstep. When we're too tired, we know we can rely on the delivery guy. In term of content, expect to see it show up at your doorstep more often than the pizza guy plus it's cheaper with the cost only coming from the software though there are many free options available. Syndication is here to stay and should be added to a company’s communication toolbox rather than as a replacement. Witness it by watching for RSS, XML, RDF, and Atom out there.

Meryl K. Evans is the Content Maven behind meryl.net who increases conversion rates by writing and editing content so organization can focus on their core business. She is the editor-in-chief of the eNewsletter Journal and Shavlik's The Remediator Security Digest. Visit her Web site at http://www.meryl.net/blog/.

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