Click here to close now.

Welcome!

Eclipse Authors: Sematext Blog, Marcin Warpechowski, Trevor Parsons, Michael Meiner, Carmen Gonzalez

Related Topics: Eclipse, Java

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
As organizations shift toward IT-as-a-service models, the need for managing and protecting data residing across physical, virtual, and now cloud environments grows with it. CommVault can ensure protection &E-Discovery of your data – whether in a private cloud, a Service Provider delivered public cloud, or a hybrid cloud environment – across the heterogeneous enterprise. In his session at 16th Cloud Expo, Randy De Meno, Chief Technologist - Windows Products and Microsoft Partnerships, will discuss how to cut costs, scale easily, and unleash insight with CommVault Simpana software, the only si...
Analytics is the foundation of smart data and now, with the ability to run Hadoop directly on smart storage systems like Cloudian HyperStore, enterprises will gain huge business advantages in terms of scalability, efficiency and cost savings as they move closer to realizing the potential of the Internet of Things. In his session at 16th Cloud Expo, Paul Turner, technology evangelist and CMO at Cloudian, Inc., will discuss the revolutionary notion that the storage world is transitioning from mere Big Data to smart data. He will argue that today’s hybrid cloud storage solutions, with commodity...
Cloud data governance was previously an avoided function when cloud deployments were relatively small. With the rapid adoption in public cloud – both rogue and sanctioned, it’s not uncommon to find regulated data dumped into public cloud and unprotected. This is why enterprises and cloud providers alike need to embrace a cloud data governance function and map policies, processes and technology controls accordingly. In her session at 15th Cloud Expo, Evelyn de Souza, Data Privacy and Compliance Strategy Leader at Cisco Systems, will focus on how to set up a cloud data governance program and s...
Every innovation or invention was originally a daydream. You like to imagine a “what-if” scenario. And with all the attention being paid to the so-called Internet of Things (IoT) you don’t have to stretch the imagination too much to see how this may impact commercial and homeowners insurance. We’re beyond the point of accepting this as a leap of faith. The groundwork is laid. Now it’s just a matter of time. We can thank the inventors of smart thermostats for developing a practical business application that everyone can relate to. Gone are the salad days of smart home apps, the early chalkb...
Roberto Medrano, Executive Vice President at SOA Software, had reached 30,000 page views on his home page - http://RobertoMedrano.SYS-CON.com/ - on the SYS-CON family of online magazines, which includes Cloud Computing Journal, Internet of Things Journal, Big Data Journal, and SOA World Magazine. He is a recognized executive in the information technology fields of SOA, internet security, governance, and compliance. He has extensive experience with both start-ups and large companies, having been involved at the beginning of four IT industries: EDA, Open Systems, Computer Security and now SOA.
The industrial software market has treated data with the mentality of “collect everything now, worry about how to use it later.” We now find ourselves buried in data, with the pervasive connectivity of the (Industrial) Internet of Things only piling on more numbers. There’s too much data and not enough information. In his session at @ThingsExpo, Bob Gates, Global Marketing Director, GE’s Intelligent Platforms business, to discuss how realizing the power of IoT, software developers are now focused on understanding how industrial data can create intelligence for industrial operations. Imagine ...
We certainly live in interesting technological times. And no more interesting than the current competing IoT standards for connectivity. Various standards bodies, approaches, and ecosystems are vying for mindshare and positioning for a competitive edge. It is clear that when the dust settles, we will have new protocols, evolved protocols, that will change the way we interact with devices and infrastructure. We will also have evolved web protocols, like HTTP/2, that will be changing the very core of our infrastructures. At the same time, we have old approaches made new again like micro-services...
Operational Hadoop and the Lambda Architecture for Streaming Data Apache Hadoop is emerging as a distributed platform for handling large and fast incoming streams of data. Predictive maintenance, supply chain optimization, and Internet-of-Things analysis are examples where Hadoop provides the scalable storage, processing, and analytics platform to gain meaningful insights from granular data that is typically only valuable from a large-scale, aggregate view. One architecture useful for capturing and analyzing streaming data is the Lambda Architecture, representing a model of how to analyze rea...
Today’s enterprise is being driven by disruptive competitive and human capital requirements to provide enterprise application access through not only desktops, but also mobile devices. To retrofit existing programs across all these devices using traditional programming methods is very costly and time consuming – often prohibitively so. In his session at @ThingsExpo, Jesse Shiah, CEO, President, and Co-Founder of AgilePoint Inc., discussed how you can create applications that run on all mobile devices as well as laptops and desktops using a visual drag-and-drop application – and eForms-buildi...
SYS-CON Events announced today that Vitria Technology, Inc. will exhibit at SYS-CON’s @ThingsExpo, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. Vitria will showcase the company’s new IoT Analytics Platform through live demonstrations at booth #330. Vitria’s IoT Analytics Platform, fully integrated and powered by an operational intelligence engine, enables customers to rapidly build and operationalize advanced analytics to deliver timely business outcomes for use cases across the industrial, enterprise, and consumer segments.
Containers and microservices have become topics of intense interest throughout the cloud developer and enterprise IT communities. Accordingly, attendees at the upcoming 16th Cloud Expo at the Javits Center in New York June 9-11 will find fresh new content in a new track called PaaS | Containers & Microservices Containers are not being considered for the first time by the cloud community, but a current era of re-consideration has pushed them to the top of the cloud agenda. With the launch of Docker's initial release in March of 2013, interest was revved up several notches. Then late last...
SYS-CON Events announced today that Dyn, the worldwide leader in Internet Performance, 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. Dyn is a cloud-based Internet Performance company. Dyn helps companies monitor, control, and optimize online infrastructure for an exceptional end-user experience. Through a world-class network and unrivaled, objective intelligence into Internet conditions, Dyn ensures traffic gets delivered faster, safer, and more reliably than ever.
CommVault has announced that top industry technology visionaries have joined its leadership team. The addition of leaders from companies such as Oracle, SAP, Microsoft, Cisco, PwC and EMC signals the continuation of CommVault Next, the company's business transformation for sales, go-to-market strategies, pricing and packaging and technology innovation. The company also announced that it had realigned its structure to create business units to more directly match how customers evaluate, deploy, operate, and purchase technology.
In their session at @ThingsExpo, Shyam Varan Nath, Principal Architect at GE, and Ibrahim Gokcen, who leads GE's advanced IoT analytics, focused on the Internet of Things / Industrial Internet and how to make it operational for business end-users. Learn about the challenges posed by machine and sensor data and how to marry it with enterprise data. They also discussed the tips and tricks to provide the Industrial Internet as an end-user consumable service using Big Data Analytics and Industrial Cloud.
Performance is the intersection of power, agility, control, and choice. If you value performance, and more specifically consistent performance, you need to look beyond simple virtualized compute. Many factors need to be considered to create a truly performant environment. In his General Session at 15th Cloud Expo, Harold Hannon, Sr. Software Architect at SoftLayer, discussed how to take advantage of a multitude of compute options and platform features to make cloud the cornerstone of your online presence.
The explosion of connected devices / sensors is creating an ever-expanding set of new and valuable data. In parallel the emerging capability of Big Data technologies to store, access, analyze, and react to this data is producing changes in business models under the umbrella of the Internet of Things (IoT). In particular within the Insurance industry, IoT appears positioned to enable deep changes by altering relationships between insurers, distributors, and the insured. In his session at @ThingsExpo, Michael Sick, a Senior Manager and Big Data Architect within Ernst and Young's Financial Servi...
Almost everyone sees the potential of Internet of Things but how can businesses truly unlock that potential. The key will be in the ability to discover business insight in the midst of an ocean of Big Data generated from billions of embedded devices via Systems of Discover. Businesses will also need to ensure that they can sustain that insight by leveraging the cloud for global reach, scale and elasticity.
IoT is still a vague buzzword for many people. In his session at @ThingsExpo, Mike Kavis, Vice President & Principal Cloud Architect at Cloud Technology Partners, discussed the business value of IoT that goes far beyond the general public's perception that IoT is all about wearables and home consumer services. He also discussed how IoT is perceived by investors and how venture capitalist access this space. Other topics discussed were barriers to success, what is new, what is old, and what the future may hold. Mike Kavis is Vice President & Principal Cloud Architect at Cloud Technology Pa...
Even as cloud and managed services grow increasingly central to business strategy and performance, challenges remain. The biggest sticking point for companies seeking to capitalize on the cloud is data security. Keeping data safe is an issue in any computing environment, and it has been a focus since the earliest days of the cloud revolution. Understandably so: a lot can go wrong when you allow valuable information to live outside the firewall. Recent revelations about government snooping, along with a steady stream of well-publicized data breaches, only add to the uncertainty
The explosion of connected devices / sensors is creating an ever-expanding set of new and valuable data. In parallel the emerging capability of Big Data technologies to store, access, analyze, and react to this data is producing changes in business models under the umbrella of the Internet of Things (IoT). In particular within the Insurance industry, IoT appears positioned to enable deep changes by altering relationships between insurers, distributors, and the insured. In his session at @ThingsExpo, Michael Sick, a Senior Manager and Big Data Architect within Ernst and Young's Financial Servi...