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to make J2EE development productive when compared with competing technologies Other vendors, like Borland, are primarily tool vendors and may add J2EE tools to an existing repertoire of tools for other programming languages and technologies IBM, the founder of Eclipse, has both of these IDE requirements since it needs J2EE tools to drive sales of the WebSphere application server and also needs a platform to integrate the many tools that make up the Rational portfolio Adopting Eclipse in general, and WTP in particular, makes sense for both types of vendor IDEs have been around a long time, and most of the user interface design principles have been worked out There is now a definite convergence in IDE design In fact, if you look quickly at a screenshot of a typical IDE, you ll probably have trouble identifying it The general layout of the screen varies little from vendor to vendor Typically you ll see a tree view that displays the files in your development project, a source code editor with syntax highlighting and code assist, some property sheets, and a console for displaying build process output There will also be a debugger, integration with a source code control system, and some visual user interface designers These features are no longer differentiators They are table stakes for entering the IDE market Adopting Eclipse makes a lot of sense for vendors that derive most of their revenue from tool sales, since it is a generic tool integration framework and can be used as the common infrastructure for IDEs for any programming language This was in fact the primary motivation for the creation of Eclipse Although IBM had VisualAge IDEs for C++, Smalltalk, Java, and other languages, they were independent products and were usually based on completely different technologies Even when they shared technology, as in the case of VisualAge Smalltalk and Java, they were mutually exclusive While mixed language development may not have been a factor in the 1980s, it was the norm in the 1990s with the advent of Web applications that mixed source code written in Java, HTML, JavaScript, and others IBM needed a new, language-neutral IDE technology, built from the ground up, that would eclipse its aging VisualAge family and provide the basis for the next generation Eclipse was designed to be languageneutral so that no programming language was a second-class citizen All key IDE services are exposed to plug-ins via well-defined APIs All languages play by the same rules Adopting WTP makes even more sense for vendors that derive most of their revenue from application server sales, because developing IDE infrastructure is expensive and not their core competence Although these vendors are J2EE experts, it is very expensive to maintain standards currency J2EE is a moving target So far, we ve had J2EE 12, 13, and 14, and the latest version, which Sun is calling Java EE 50, is becoming the default choice for new development But
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customers don t port all their existing applications whenever a new J2EE version appears Application development is also very expensive, and customers need to focus on developing new applications that yield business value rather than redoing running applications WTP provides core support for J2EE, tracks the standards, and ensures that support for the different versions can coexist within the IDE When WTP is upgraded to support a new version of J2EE, you ll still be able to use it to maintain your existing applications The value proposition for J2EE tool vendors is that WTP lets them share the development expense for creating a high-quality, standards-compliant, and standards-current infrastructure so they can focus on those value-added features that differentiate their products and services from the competition WTP is also very well aligned with one of the core principles of J2EE, application portability J2EE is a set of APIs and file formats that allow Web applications to run on any compliant server This is the extension of the Java Write once, run anywhere (WORA) principle to Web applications WTP promotes the WORA principle for J2EE by focusing on standards and employing the wellknown quality benefits of Open Source development to find and fix errors in implementation WTP adheres to the principle of vendor-neutrality and hosts the development of server adapters for many J2EE application servers, including IBM WebSphere, BEA WebLogic, JBoss Application Server, Apache Tomcat and Geromino, ObjectWeb Jonas, Oracle Application Server, and others Additional vendors are adopting WTP and could contribute more server adapters in the future This large variety of application servers using WTP means that the test coverage is excellent far more than any single tool vendor could afford The result is that the standards compliance, and therefore portability, of applications developed with WTP is second to none There are also additional costs in Open Source development Fostering an active user community requires that developers devote a significant amount of time to responding to questions on newsgroups, answering bug reports, reviewing patches, writing tutorials, speaking at user groups, presenting at conferences, and even writing books like the one you re reading now Many of these activities are also part of proprietary software development, but they acquire a much greater significance for Open Source projects given the key role that the user community plays On balance, the extra development expense associated with maintaining a healthy user community is more than compensated for by the cost-sharing benefits
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