Click here to close now.




















Welcome!

You will be redirected in 30 seconds or close now.

ColdFusion Authors: Yakov Fain, Maureen O'Gara, Nancy Y. Nee, Tad Anderson, Daniel Kaar

Related Topics: ColdFusion

ColdFusion: Article

ColdFusion Developer's Journal Special "Frameworks" Focus Issue: onTap

Using the onTap framework to reinvent the Pet Market application

I must admit to having been excited at the prospect of the Pet Market frameworks project when Simon proposed it to us at the Fusebox & Frameworks Conference in September. I once tried to do something similar by creating a small blog application using the three popular frameworks that I was aware of at the time (Fusebox 3-4 and Mach-II) and the onTap framework.

Unfortunately I did all the work myself and didn't have a great venue like the ColdFusion Developer's Journal to publish the results. In the end I think my efforts at a useful comparison of frameworks fell short of what I'd hoped. Naturally I'm excited to see Simon take the initiative to enlist the aid of various framework authors and publish the results in the journal. Although I personally lament the fact that the Pet Market application isn't perhaps an ideal medium to demonstrate the unique strengths or advantages of some frameworks (not only the onTap framework, although in my case display tools in particular spring to mind), I do believe the Pet Market application provides probably the best neutral ground for comparison.

My own conversion of the Pet Market application took a bit longer than I expected. At first I thought it was good that the Pet Market application was designed purely for demonstration purposes and wouldn't be used in a production environment.

On further reflection I wonder if perhaps the opposite is true - that the original application is worse for its attempts to educate programmers new to ColdFusion because anyone using it as a learning tool is apt to learn some bad habits. Here are a few examples of what I mean: no primary keys or foreign key constraints in the database containing many related tables (no enforcement of referential integrity); display code executed in a domain-model CFC; and serpentine multi-step form templates containing both form display and post logic in the same file. I'll omit my complaints about the way in which multiple historical postal addresses are stored. Having said all that, here's an application ripe for the kind of structure any good framework will provide.

A Statement of Benefits
Here's a brief list of the benefits I've found using the onTap framework to reinvent the Pet Market application in no particular order.

  • Eliminated code while simultaneously adding functionality
  • Replaced ad hoc queries with Object Relational Mapping (ORM) and vendor-agnostic SQL abstraction
  • Convenient caching of domain-model objects (products, categories, etc.)
  • Products in the shopping cart are locale-specific, dictionary-order sorted (i18n)
  • All files located in a single parent directory (no CustomTags directory or other external resources)
  • Elimination of the custom tag for the application's layout (individual content templates don't reference the layout tag/template - decreases coupling of the content and format)
  • Automated branding of images (home page graphics differ from the remaining site)
Due to time constraints and project requests from Simon, I was unable to implement any of the XHTML or form-management and validation features of the framework and as a result can't list them as benefits in using the framework in this instance although under normal circumstances I would have. The onTap framework's form tools would have replaced a fair amount of custom form validation code in this application in a manner that provides identical client-side and server-side validation with very little coding on my part. The XHTML features would have also provided a more modular method of generating the display, allowing anyone who might license my application to easily modify the display without editing any of my code, eliminating headaches related to later upgrades of my original software.

A Place for Everything and Everything in its Place
Because the onTap framework is designed to take advantage of directory structures, getting started with the migration of Pet Market to this framework is easy. First I created a /petmarket/ directory under my framework application root directory in which the Pet Market sub-application would execute. In this directory I put a copy of all the ColdFusion templates in the original application's /wwwroot/ directory. I could have put these templates in the framework root directory, although I didn't want to create a separate copy of the onTap framework core (3MB) for only the Pet Market application, so I created the subdirectory so it could execute as a sub-application under my existing framework installation. Then I copied the new /petmarket/ directory also into the framework /_components/ directory to mirror the root directory. Files in the root directory will be directly accessible to browsers, while files in the /_components/ directory won't (they're protected by an Application.cfm template). Once these files are copied, I replace the contents of each of the templates in the root /petmarket/ directory with a one-line cfinclude tag to drive the framework content:

<cfinclude template="#request.tapi.process()#">

This sort of minimalist index template should be familiar to anyone using Fusebox, Mach-II, Model-Glue, or the Hub. What's different in this case is that we have many Web-accessible templates instead of having all page requests routed through index.cfm.

To be fair the same can be done also with any of these other frameworks, although the other frameworks are rarely implemented this way because they don't inherently gain any noticeable benefit from using this structure and as such it's generally easier to simply route all requests through the index.cfm template. However, with the onTap framework the name of the base template is used as a part of the execution path to determine which templates are executed by the framework. So using cart.cfm has an inherently different result than using index.cfm as the base template. Of course there's nothing preventing you from routing all requests through index.cfm, although using this multi-template strategy let me migrate the application more quickly thanks to not needing to edit any of the links, form targets, or cflocation tags in the application. Had I used any of these other frameworks, which use form/url parameters and XML configuration files to direct their execution, they would have required that I edit every URL in the application to add the appropriate event parameter (FuseAction, event, etc.).

Although I chose a directory structure that let me ignore URLs in the application, I chose not to take the same approach with images. Although I could have simply left the Pet Market images in the /ontap/petmarket/images/ directory and ignored any image tags in the application HTML, the framework provides some added features with regard to images and for this reason I decided to put the images in the framework's designated image directories.

Yup, multiple image directories.

Although most HTML applications put all images in a single directory, the onTap framework provides a method of easily targeting methods contextually to provide simple branding and replacement of images by context. Interestingly enough, the Pet Market application provides a perfect example of why I included this feature in the framework in spite of the fact that the original Pet Market authors never imagined that I would write this framework revision: more evidence that this is a good feature to have.

When you view the Pet Market application in a browser, you'll notice that the layout presents several images of different animals at the top, linked to category pages for the various categories of pets, such as dogs, cats, and reptiles. As you browse through the application, however, you might notice that a different set of images is presented on the home page than on any other page in the application. In the original application, the location of this image was tightly coupled with the layout custom tag: the layout tag contained logic to determine if the current page was the home page and displayed a different set of images (including the size of the image as part of the name of the graphic file). I put copies of each of these smaller five images in the directory /ontap/_components/petmarket/_images/category/ for most pages in the application to use, renaming them to remove the image size from its file name. This makes the image name succinct and canonical and the name of the image file accurate, even if the size of the image changes later. Then I copied the five larger images to the directory /ontap/_components/petmarket/index/_images/category/ for the home page to use with the same succinct file names.

Throughout the HTML for the application I then replaced all image tag SRC attributes with the function request.tapi.getIMG() containing the name of the target image. This function checks a series of nested image directories and returns the URL to the first image it finds. So when the layout requests request.tapi.getIMG("category/dogs.gif") it will use the image located in /petmarket/index/_images/category/ on the home page and on every other page it will use the image located in /petmarket/_images/category/.

More Stories By Isaac Dealey

Isaac Dealey has worked with ColdFusion since 1997 (version 3) for clients from small businesses to large enterprises, including MCI and AT&T Wireless. He evangelizes ColdFusion as a volunteer member of Team Macromedia, is working toward becoming a technical instructor, and is available for speaking engagements.

Comments (2) 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
SYS-CON Brazil News Desk 02/01/06 03:38:19 PM EST

I must admit to having been excited at the prospect of the Pet Market frameworks project when Simon proposed it to us at the Fusebox & Frameworks Conference in September. I once tried to do something similar by creating a small blog application using the three popular frameworks that I was aware of at the time (Fusebox 3-4 and Mach-II) and the onTap framework.

SYS-CON India News Desk 02/01/06 02:49:28 PM EST

I must admit to having been excited at the prospect of the Pet Market frameworks project when Simon proposed it to us at the Fusebox & Frameworks Conference in September. I once tried to do something similar by creating a small blog application using the three popular frameworks that I was aware of at the time (Fusebox 3-4 and Mach-II) and the onTap framework.

@ThingsExpo Stories
While many app developers are comfortable building apps for the smartphone, there is a whole new world out there. In his session at @ThingsExpo, Narayan Sainaney, Co-founder and CTO of Mojio, will discuss how the business case for connected car apps is growing and, with open platform companies having already done the heavy lifting, there really is no barrier to entry.
In his session at @ThingsExpo, Lee Williams, a producer of the first smartphones and tablets, will talk about how he is now applying his experience in mobile technology to the design and development of the next generation of Environmental and Sustainability Services at ETwater. He will explain how M2M controllers work through wirelessly connected remote controls; and specifically delve into a retrofit option that reverse-engineers control codes of existing conventional controller systems so they don't have to be replaced and are instantly converted to become smart, connected devices.
Too often with compelling new technologies market participants become overly enamored with that attractiveness of the technology and neglect underlying business drivers. This tendency, what some call the “newest shiny object syndrome,” is understandable given that virtually all of us are heavily engaged in technology. But it is also mistaken. Without concrete business cases driving its deployment, IoT, like many other technologies before it, will fade into obscurity.
Akana has announced the availability of the new Akana Healthcare Solution. The API-driven solution helps healthcare organizations accelerate their transition to being secure, digitally interoperable businesses. It leverages the Health Level Seven International Fast Healthcare Interoperability Resources (HL7 FHIR) standard to enable broader business use of medical data. Akana developed the Healthcare Solution in response to healthcare businesses that want to increase electronic, multi-device access to health records while reducing operating costs and complying with government regulations.
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.
WebRTC services have already permeated corporate communications in the form of videoconferencing solutions. However, WebRTC has the potential of going beyond and catalyzing a new class of services providing more than calls with capabilities such as mass-scale real-time media broadcasting, enriched and augmented video, person-to-machine and machine-to-machine communications. In his session at @ThingsExpo, Luis Lopez, CEO of Kurento, will introduce the technologies required for implementing these ideas and some early experiments performed in the Kurento open source software community in areas ...
The 3rd International WebRTC Summit, to be held Nov. 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA, announces that its Call for Papers is now open. Topics include all aspects of improving IT delivery by eliminating waste through automated business models leveraging cloud technologies. WebRTC Summit is co-located with 15th International Cloud Expo, 6th International Big Data Expo, 3rd International DevOps Summit and 2nd Internet of @ThingsExpo. WebRTC (Web-based Real-Time Communication) is an open source project supported by Google, Mozilla and Opera that aims to enable bro...
SYS-CON Events announced today the Containers & Microservices Bootcamp, being held November 3-4, 2015, in conjunction with 17th Cloud Expo, @ThingsExpo, and @DevOpsSummit at the Santa Clara Convention Center in Santa Clara, CA. This is your chance to get started with the latest technology in the industry. Combined with real-world scenarios and use cases, the Containers and Microservices Bootcamp, led by Janakiram MSV, a Microsoft Regional Director, will include presentations as well as hands-on demos and comprehensive walkthroughs.
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!
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...
As more intelligent IoT applications shift into gear, they’re merging into the ever-increasing traffic flow of the Internet. It won’t be long before we experience bottlenecks, as IoT traffic peaks during rush hours. Organizations that are unprepared will find themselves by the side of the road unable to cross back into the fast lane. As billions of new devices begin to communicate and exchange data – will your infrastructure be scalable enough to handle this new interconnected world?
With the proliferation of connected devices underpinning new Internet of Things systems, Brandon Schulz, Director of Luxoft IoT – Retail, will be looking at the transformation of the retail customer experience in brick and mortar stores in his session at @ThingsExpo. Questions he will address include: Will beacons drop to the wayside like QR codes, or be a proximity-based profit driver? How will the customer experience change in stores of all types when everything can be instrumented and analyzed? As an area of investment, how might a retail company move towards an innovation methodolo...
The Internet of Things is in the early stages of mainstream deployment but it promises to unlock value and rapidly transform how organizations manage, operationalize, and monetize their assets. IoT is a complex structure of hardware, sensors, applications, analytics and devices that need to be able to communicate geographically and across all functions. Once the data is collected from numerous endpoints, the challenge then becomes converting it into actionable insight.
Contrary to mainstream media attention, the multiple possibilities of how consumer IoT will transform our everyday lives aren’t the only angle of this headline-gaining trend. There’s a huge opportunity for “industrial IoT” and “Smart Cities” to impact the world in the same capacity – especially during critical situations. For example, a community water dam that needs to release water can leverage embedded critical communications logic to alert the appropriate individuals, on the right device, as soon as they are needed to take action.
As more and more data is generated from a variety of connected devices, the need to get insights from this data and predict future behavior and trends is increasingly essential for businesses. Real-time stream processing is needed in a variety of different industries such as Manufacturing, Oil and Gas, Automobile, Finance, Online Retail, Smart Grids, and Healthcare. Azure Stream Analytics is a fully managed distributed stream computation service that provides low latency, scalable processing of streaming data in the cloud with an enterprise grade SLA. It features built-in integration with Azur...
SYS-CON Events announced today that the "Second Containers & Microservices Expo" will take place November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Containers and microservices have become topics of intense interest throughout the cloud developer and enterprise IT communities.
SYS-CON Events announced today that Pythian, a global IT services company specializing in helping companies leverage disruptive technologies to optimize revenue-generating systems, has been named “Bronze Sponsor” of SYS-CON's 17th Cloud Expo, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Founded in 1997, Pythian is a global IT services company that helps companies compete by adopting disruptive technologies such as cloud, Big Data, advanced analytics, and DevOps to advance innovation and increase agility. Specializing in designing, imple...
WebRTC has had a real tough three or four years, and so have those working with it. Only a few short years ago, the development world were excited about WebRTC and proclaiming how awesome it was. You might have played with the technology a couple of years ago, only to find the extra infrastructure requirements were painful to implement and poorly documented. This probably left a bitter taste in your mouth, especially when things went wrong.
Through WebRTC, audio and video communications are being embedded more easily than ever into applications, helping carriers, enterprises and independent software vendors deliver greater functionality to their end users. With today’s business world increasingly focused on outcomes, users’ growing calls for ease of use, and businesses craving smarter, tighter integration, what’s the next step in delivering a richer, more immersive experience? That richer, more fully integrated experience comes about through a Communications Platform as a Service which allows for messaging, screen sharing, video...
SYS-CON Events announced today that IceWarp will exhibit at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. IceWarp, the leader of cloud and on-premise messaging, delivers secured email, chat, documents, conferencing and collaboration to today's mobile workforce, all in one unified interface