Click here to close now.

Welcome!

Eclipse Authors: XebiaLabs Blog, Ken Fogel, Sematext Blog, Marcin Warpechowski, Trevor Parsons

Related Topics: Eclipse, Java IoT

Eclipse: Article

Eclipse: The Story of Web Tools Platform 0.7

J2EE Development the Eclipse Way - Its Scope, Design Principles, Architecture, Ecosystem, and Plans

The Eclipse Open Source Integrated Development Environment (IDE) (see http://eclipse.org) is rapidly gaining popularity among Java developers primarily because of its excellent Java Development Tools (JDT) and its highly extensible plug-in architecture. Extensibility is, in fact, one of the defining characteristics of Eclipse. As the Eclipse home page says, "Eclipse is a kind of universal tool platform - an open extensible IDE for anything and nothing in particular." Although Eclipse is itself a Java application, all tools, including JDT, are on an equal footing in that they extend the Eclipse platform via well-defined extension points.

Of course, an infinitely extensible, but empty, platform might be interesting to tool vendors, but very boring for developers. Therefore, the initial version of Eclipse came with the JDT and the Plug-in Development Environment (PDE), both examples of how to extend the platform and very useful tools in their own right. JDT supported J2SE development while PDE supported Java-based Eclipse plug-in development. The combination of JDT and PDE fueled the creation of thousands of commercial and Open Source plug-ins for Eclipse, many of which supported J2EE development. For example, IBM released Eclipse-based commercial J2EE products, including WebSphere Studio Application Developer, and Rational Application Developer, while eteration, JBoss, Genuitec, Exadel, and Innoopract among others, released Open Source offerings. However, the profusion of J2EE plug-ins made it difficult for vendors to build on each other and for users to assemble an integrated suite of tools. For example, each J2EE toolset had its own way to support application servers.

As the popularity of Eclipse grew, it became apparent that the next logical step in its evolution was to add platform support for J2EE. This support would provide a common infrastructure for all J2EE plug-ins, with the goal of improving tool integration, reducing plug-in development expense, and simplifying the J2EE development experience for Eclipse users.

In June 2004, based on a proposal from IBM, the Eclipse Management Organization (EMO) agreed to create a new top-level project, the Web Tools Platform (WTP). However, it was believed that for WTP to be truly successful it needed a broad base of vendor support. A search began to engage additional vendors to partner with IBM. WTP was discussed in a BOF session at the first EclipseCon conference held in February 2004, and ObjectWeb agreed to lead the project creation effort. ObjectWeb assembled a set of vendors to join the project and agreed to co-lead the Project Management Committee (PMC). WTP was formally launched in June 2004 based on initial contributions from eteration, Lomboz, and IBM Rational Application Developer.

WTP got further industry endorsement earlier this year when BEA joined the project and announced plans to base a future version of WebLogic Workshop on it. BEA co-leads the PMC along with ObjectWeb. At this year's EclipseCon, Sybase announced the Data Tools Project (DTP), which will add to the data tools in WTP and create a platform layer dedicated to database access. Oracle and Borland also announced Eclipse projects closely related to WTP. With major vendors such as IBM, BEA, Borland, Oracle, and Sybase all co-operating on a shared Open Source tool infrastructure, the center of gravity for J2EE tools has clearly shifted to Eclipse.

WTP 0.7 development is now well underway and has released a series of milestone drivers that can be downloaded from http://eclipse.org/webtools. The final release of WTP 0.7 is on track for a July 2005 delivery. The rest of this article gives you an overview of WTP, its scope, design principles, architecture, ecosystem, and plans.

A Quick Tour of WTP
One way to understand WTP is that it extends Eclipse along two dimensions, namely execution environments and artifact types. The execution environment dimension defines where code runs. Out-of-the-box, Eclipse lets you develop Java main programs that run in a command shell, applets that run in a Web browser, JUnit tests that run in a JUnit runner, and ANT tasks that run in ANT. WTP extends Eclipse by adding servers in general, and both J2EE and database servers in particular, as new execution environments. In general, you need to install an execution environment, configure it in Eclipse, and associate it with development artifacts that you want to run in it.

The development artifact dimension defines what developers create. Obviously, Eclipse majors in Java source code as a primary development artifact. However other artifacts, such as PDE plug-in manifests and Ant build scripts, are also supported. Each artifact type has associated with it builders, creation wizards, syntax-aware editors, validators, semantic search extensions, and refactoring support. Eclipse users expect editors to provide first-class programmer assistance such as code completion, syntax coloring, error markers, and quick fixes. WTP extends Eclipse with support for the large set of new artifact types encountered in J2EE development. These include HTML, CSS, JavaScript, XHTML, JSP, XML, XSD, WSDL, SQL, and all the J2EE deployment descriptors.

One of the key design goals of WTP is to extend Eclipse seamlessly to support these additional execution environments and artifact types. All of the functions that Eclipse users have come to expect from Java source code should "just work" for the new artifacts. For example, if I select a Java main program, I can Run or Debug it. The same should apply to a JSP. When I select it, the Run command should do something sensible. Specifically for a JSP I expect the Run command to somehow deploy my code into a J2EE server and launch a Web browser with the URL for my JSP. Similarly, the Debug command should run my J2EE server in debug mode and the standard Eclipse Debugger should let me step through my JSP source code. My JSP editor should provide code completion for both JSP tags and inlined Java scriptlets. Furthermore, I expect the code completion for Java scriptlets to work exactly like the code completion for Java source files. I don't want to learn new editing commands simply because I'm editing a new artifact type.

WTP 0.7 achieves many of these goals but there is much work to do to support J2EE fully. Consider the problem of refactoring a J2EE application. An operation as simple as renaming a Java class can have many consequences. If the renaming isn't fully rippled through the application, a runtime error can occur. For example, in addition to references from other Java classes, a Java class can be referenced by JSPs and deployment descriptors. All of these artifacts must be updated to reflect the new name. Suppose the Java class is deployed as a Web Service and that WSDL is generated from it. The WSDL may also need to be regenerated. First-class refactoring of J2EE applications will be an ongoing focus for WTP.

Now let's create a JSP version of "Hello, world." If you'd like to follow along, you'll need to do some setup. Download and install the latest stable driver of WTP from the Web site mentioned above. WTP provides support for many popular commercial and Open Source J2EE servers but doesn't include the runtimes. So you also need to install a server on your machine. For purposes of illustration, I'll use Apache Tomcat 5.0.28, which you can obtain from http://jakarta.apache.org/tomcat/. Finally, you'll need a full JDK since JSPs require a Java compiler. I'm using Sun J2SDK 1.4.2_06.

WTP provides a Preference page for Servers. Open the Preference dialog and go to the Server page. Add your Tomcat 5.0 server and configure it to use your JDK (if you use a JRE then JSP compilation will fail). Figure 1 shows the Server Preference page.

Next, create a new Flexible Java Project named Project1 and a new J2EE Web module named Web1 in it. A Flexible Java Project is a J2EE project that can hold several J2EE modules. Figure 2 shows the J2EE Project Explorer after Project1 and Web1 have been created.

Now we're ready to create our JSP. Select the WebContent folder of the Web1 module and use the New File wizard to create a JSP named hello-world.jsp. The wizard fills in the skeleton of a JSP document and opens the file with the JSP editor. The JSP editor has full content assist for HTML and JSP tags, as well as Java scriptlets. Edit the file to say "Hello, world" and save it. Figure 3 shows the JSP editor.

More Stories By Arthur Ryman

Arthur Ryman is a Senior Technical Staff Member and Development Manager at the IBM Toronto Lab. He is currently the lead of the Web Standard Tools subproject of the Eclipse Web Tools Platform project. His previous development projects include Rational Application Developer, WebSphere Studio Application Developer, and VisualAge for Java. He is a member of the W3C Web Services Description Working Group and is an editor of the Web Services Description Language 2.0 specification. He is a co-author of the book, "Java Web Services Unleashed".

Comments (6) View Comments

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


Most Recent Comments
obinna kalu 10/21/05 01:04:24 PM EDT

Oh yes!!! The Eclipse WTP toolset has been such a fantastic breath of fresh air to the development of enterprise web applications for the java platform. I downloaded and trialed the version 0.7 stable release last July 2005,and I must say it was simply brilliant. Having wondered, in the preceeding months, where to find a good, non-commercial IDE for doing java web development and having been managing with sysdeo's tomcat plug-in and other plugins that do some quasi html/xml tag coloring, discovering WTP 0.7 was a big blessing. I look forward to versions 1.0 and subsequently 1.5 with great enthusiasm.

Eclipse News 10/19/05 08:39:49 PM EDT

The Eclipse Open Source Integrated Development Environment (IDE) (see http://eclipse.org) is rapidly gaining popularity among Java developers primarily because of its excellent Java Development Tools (JDT) and its highly extensible plug-in architecture. Extensibility is, in fact, one of the defining characteristics of Eclipse. As the Eclipse home page says, 'Eclipse is a kind of universal tool platform - an open extensible IDE for anything and nothing in particular.'

Rui Wang 08/30/05 10:41:38 AM EDT

Hello,sir.I'm a developer from China.I like your article.However,what does EDJ mean?I really don't know.Can you tell me?Thank you

Serge Baccou's Blog 07/21/05 06:04:48 PM EDT

Trackback Added: Eclipse Web Tools Platform (WTP); Eclipse Web Tools Platform (WTP) extends Eclipse for web developments and/or J2EE developments. WTP is useful for people who develop web sites or J2EE applications using Eclipse. This note presents WTP but also talks about WST, JST, EMF, XSD, SDO, GEF ...

Eclipse News Desk 07/18/05 12:57:38 PM EDT

Eclipse.Org Exclusive: Web Tools Platform And J2EE Development The Eclipse Way
The Eclipse Open Source Integrated Development Environment (IDE) (see http://eclipse.org) is rapidly gaining popularity among Java developers primarily because of its excellent Java Development Tools (JDT) and its highly extensible plug-in architecture. Extensibility is, in fact, one of the defining characteristics of Eclipse. As the Eclipse home page says, 'Eclipse is a kind of universal tool platform - an open extensible IDE for anything and nothing in particular.'

Eclipse News Desk 07/18/05 09:32:44 AM EDT

Eclipse.Org Web Tools Platform: J2EE Development the Eclipse Way. The Eclipse Open Source Integrated Development Environment (IDE) (see http://eclipse.org) is rapidly gaining popularity among Java developers primarily because of its excellent Java Development Tools (JDT) and its highly extensible plug-in architecture. Extensibility is, in fact, one of the defining characteristics of Eclipse. As the Eclipse home page says, 'Eclipse is a kind of universal tool platform - an open extensible IDE for anything and nothing in particular.'

@ThingsExpo Stories
Today air travel is a minefield of delays, hassles and customer disappointment. Airlines struggle to revitalize the experience. GE and M2Mi will demonstrate practical examples of how IoT solutions are helping airlines bring back personalization, reduce trip time and improve reliability. In their session at @ThingsExpo, Shyam Varan Nath, Principal Architect with GE, and Dr. Sarah Cooper, M2Mi’s VP Business Development and Engineering, will explore the IoT cloud-based platform technologies driving this change including privacy controls, data transparency and integration of real time context wi...
It is one thing to build single industrial IoT applications, but what will it take to build the Smart Cities and truly society-changing applications of the future? The technology won’t be the problem, it will be the number of parties that need to work together and be aligned in their motivation to succeed. In his session at @ThingsExpo, Jason Mondanaro, Director, Product Management at Metanga, discussed how you can plan to cooperate, partner, and form lasting all-star teams to change the world and it starts with business models and monetization strategies.
Internet of Things is moving from being a hype to a reality. Experts estimate that internet connected cars will grow to 152 million, while over 100 million internet connected wireless light bulbs and lamps will be operational by 2020. These and many other intriguing statistics highlight the importance of Internet powered devices and how market penetration is going to multiply many times over in the next few years.
Internet of Things (IoT) will be a hybrid ecosystem of diverse devices and sensors collaborating with operational and enterprise systems to create the next big application. In their session at @ThingsExpo, Bramh Gupta, founder and CEO of robomq.io, and Fred Yatzeck, principal architect leading product development at robomq.io, discussed how choosing the right middleware and integration strategy from the get-go will enable IoT solution developers to adapt and grow with the industry, while at the same time reduce Time to Market (TTM) by using plug and play capabilities offered by a robust IoT ...
To many people, IoT is a buzzword whose value is not understood. Many people think IoT is all about wearables and home automation. In his session at @ThingsExpo, Mike Kavis, Vice President & Principal Cloud Architect at Cloud Technology Partners, discussed some incredible game-changing use cases and how they are transforming industries like agriculture, manufacturing, health care, and smart cities. He will discuss cool technologies like smart dust, robotics, smart labels, and much more. Prepare to be blown away with a glimpse of the future.
The Internet of Things is not only adding billions of sensors and billions of terabytes to the Internet. It is also forcing a fundamental change in the way we envision Information Technology. For the first time, more data is being created by devices at the edge of the Internet rather than from centralized systems. What does this mean for today's IT professional? In this Power Panel at @ThingsExpo, moderated by Conference Chair Roger Strukhoff, panelists addressed this very serious issue of profound change in the industry.
SYS-CON Events announced today that BMC will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. BMC delivers software solutions that help IT transform digital enterprises for the ultimate competitive business advantage. BMC has worked with thousands of leading companies to create and deliver powerful IT management services. From mainframe to cloud to mobile, BMC pairs high-speed digital innovation with robust IT industrialization – allowing customers to provide amazing user experiences with optimized IT per...
There will be 150 billion connected devices by 2020. New digital businesses have already disrupted value chains across every industry. APIs are at the center of the digital business. You need to understand what assets you have that can be exposed digitally, what their digital value chain is, and how to create an effective business model around that value chain to compete in this economy. No enterprise can be complacent and not engage in the digital economy. Learn how to be the disruptor and not the disruptee.
The Internet of Things is not only adding billions of sensors and billions of terabytes to the Internet. It is also forcing a fundamental change in the way we envision Information Technology. For the first time, more data is being created by devices at the edge of the Internet rather than from centralized systems. What does this mean for today's IT professional? In this Power Panel at @ThingsExpo, moderated by Conference Chair Roger Strukhoff, panelists will addresses this very serious issue of profound change in the industry.
Business as usual for IT is evolving into a "Make or Buy" decision on a service-by-service conversation with input from the LOBs. How does your organization move forward with cloud? In his general session at 16th Cloud Expo, Paul Maravei, Regional Sales Manager, Hybrid Cloud and Managed Services at Cisco, discusses how Cisco and its partners offer a market-leading portfolio and ecosystem of cloud infrastructure and application services that allow you to uniquely and securely combine cloud business applications and services across multiple cloud delivery models.
In his General Session at 16th Cloud Expo, David Shacochis, host of The Hybrid IT Files podcast and Vice President at CenturyLink, investigated three key trends of the “gigabit economy" though the story of a Fortune 500 communications company in transformation. Narrating how multi-modal hybrid IT, service automation, and agile delivery all intersect, he will cover the role of storytelling and empathy in achieving strategic alignment between the enterprise and its information technology.
Buzzword alert: Microservices and IoT at a DevOps conference? What could possibly go wrong? In this Power Panel at DevOps Summit, moderated by Jason Bloomberg, the leading expert on architecting agility for the enterprise and president of Intellyx, panelists peeled away the buzz and discuss the important architectural principles behind implementing IoT solutions for the enterprise. As remote IoT devices and sensors become increasingly intelligent, they become part of our distributed cloud environment, and we must architect and code accordingly. At the very least, you'll have no problem fillin...
Growth hacking is common for startups to make unheard-of progress in building their business. Career Hacks can help Geek Girls and those who support them (yes, that's you too, Dad!) to excel in this typically male-dominated world. Get ready to learn the facts: Is there a bias against women in the tech / developer communities? Why are women 50% of the workforce, but hold only 24% of the STEM or IT positions? Some beginnings of what to do about it! In her Opening Keynote at 16th Cloud Expo, Sandy Carter, IBM General Manager Cloud Ecosystem and Developers, and a Social Business Evangelist, d...
Converging digital disruptions is creating a major sea change - Cisco calls this the Internet of Everything (IoE). IoE is the network connection of People, Process, Data and Things, fueled by Cloud, Mobile, Social, Analytics and Security, and it represents a $19Trillion value-at-stake over the next 10 years. In her keynote at @ThingsExpo, Manjula Talreja, VP of Cisco Consulting Services, discussed IoE and the enormous opportunities it provides to public and private firms alike. She will share what businesses must do to thrive in the IoE economy, citing examples from several industry sectors.
In his keynote at 16th Cloud Expo, Rodney Rogers, CEO of Virtustream, discussed the evolution of the company from inception to its recent acquisition by EMC – including personal insights, lessons learned (and some WTF moments) along the way. Learn how Virtustream’s unique approach of combining the economics and elasticity of the consumer cloud model with proper performance, application automation and security into a platform became a breakout success with enterprise customers and a natural fit for the EMC Federation.
SYS-CON Events announced today that the "Second Containers & Microservices Conference" will take place November 3-5, 2015, at the Santa Clara Convention Center, Santa Clara, CA, and the “Third Containers & Microservices Conference” will take place June 7-9, 2016, at Javits Center in New York City. Containers and microservices have become topics of intense interest throughout the cloud developer and enterprise IT communities.
SYS-CON Events announced today that the "First Containers & Microservices Conference" will take place June 9-11, 2015, at the Javits Center in New York City. The “Second Containers & Microservices Conference” will take place November 3-5, 2015, at Santa Clara Convention Center, Santa Clara, CA. Containers and microservices have become topics of intense interest throughout the cloud developer and enterprise IT communities.
With major technology companies and startups seriously embracing IoT strategies, now is the perfect time to attend @ThingsExpo in Silicon Valley. Learn what is going on, contribute to the discussions, and ensure that your enterprise is as "IoT-Ready" as it can be! Internet of @ThingsExpo, taking place Nov 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 17th Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world. The Internet of Things (IoT) is the most profound change in personal an...
17th Cloud Expo, taking place Nov 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, will feature technical sessions from a rock star conference faculty and the leading industry players in the world. Cloud computing is now being embraced by a majority of enterprises of all sizes. Yesterday's debate about public vs. private has transformed into the reality of hybrid cloud: a recent survey shows that 74% of enterprises have a hybrid cloud strategy. Meanwhile, 94% of enterprises are using some form of XaaS – software, platform, and infrastructure as a service.
The 17th International Cloud Expo has announced that its Call for Papers is open. 17th International Cloud Expo, to be held November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, brings together Cloud Computing, APM, APIs, Microservices, Security, Big Data, Internet of Things, DevOps and WebRTC to one location. With cloud computing driving a higher percentage of enterprise IT budgets every year, it becomes increasingly important to plant your flag in this fast-expanding business opportunity. Submit your speaking proposal today!