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

Flash MX Web Services vs Remoting

Which is right for your project?

Flash MX 2004 Pro Web service classes or Flash Remoting components for ActionScript 2.0: Which is right for you? This article offers some guidelines.

In just three years we've come a long way. It seems like an eternity since the days when I used to code CF pages with dynamic content served up to Flash, but let me stress how rudimentary it was. Flash back to December 14, 2001, when a little site called FlashCFM received Macromedia's Site of the Day designation. On several occasions I received e-mails asking me how on earth FlashCFM received this prestigious award. There was nothing spectacular about the site, no fancy graphics, Flash animation, or anything out of the ordinary. Yet the concept behind it was brilliant, or so I believed. As you can probably guess from its name, this site introduced the marriage of Flash and ColdFusion.

FlashCFM was a community site that educated developers about the power of Flash and ColdFusion integration. When I say that this process used to be rudimentary, let me give a quick example of ColdFusion code in a page called variables.cfm:

<cfoutput>&first_name=#query.first_name#&last_name=#query.last_name#

So the output would look like:

&first_name=Dennis&last_name=Baldwin

Flash would then retrieve this data and display it with a simple line of code:

loadVariables("variables.cfm", _root);

A very simple framework indeed (more like a CSV screenscrape or accessing a query string), but it proved to be the start of something wonderful. Flash forward to the present and we have such powerful technologies as Flash Remoting and Web service components. In this article I will go into detail about the pros and cons of each solution, as well as give you enough information to decide which is the best fit for your project. This will be demonstrated with a simple application that calls identical service methods, one using Flash Remoting and the other using the Web service classes. Enough history, let's get started!

Flash MX Pro Web Service Classes
If you've opened Flash MX 2004 Pro, then you're probably aware of the new Web service classes. Macromedia has done a great job in releasing components that allow Flash developers to easily consume Web services. Throughout the rest of this article I'll be making reference to the WebServiceClasses component and not the WebServiceConnector component. The WebServiceClasses component is the minimum set of classes necessary to handle SOAP transactions programmatically, while the WebServiceConnector is more of a visual aid for accessing Web services from Flash. I believe in using a programmatic approach because it gives developers more control over their applications, allows them to better understand how the API works, and helps reduce file size.

I'm currently working for a company named SensorLogic and we're in the process of rewriting our Web portal to utilize Flash and Web services. SensorLogic is a machine-to-machine (M2M) ASP, and it's imperative that the user experience be as quick and reliable as possible. With the ASP model in mind, we'd like to expose certain services to our customers and resellers so they can build their own applications around our back-end system. We wanted our system to be flexible enough to serve data to Flash, ColdFusion, .NET, or Java. Web services gave us this flexibility. Figure 1 illustrates a basic communications architecture for Flash with Web services.

Although very extensible and flexible, Web services in Flash do have their limitations and drawbacks. The first and foremost is the overhead that SOAP transactions introduce. XML-based protocols are very descriptive, which means they add to code bloat because of markup tags and headers. With this overhead, data usually takes longer to get to the Flash client and the XML has to be parsed, which slows the process down even more. This is definitely not recommended for large data sets or complex objects. On the other hand, if you're dealing with smaller data sets and simple objects, then Web services may be the perfect fit.

Another issue worth considering is security. Unless you plan on implementing SSL, all data sent over the wire is unencrypted. So if your application contains sensitive data, then enforcing secure transactions is a must. In Flash MX 2004 a new security measure was introduced, known as the crossdomain.xml policy file. This file basically says that a Flash client coming from domain A has authority to access services on domain B. This file resides in the Web root of domain B and is automatically read by the Flash client when any Web services are called.

To further explain this issue, let's say we want to write a Flash component that accesses a weather Web service and displays the temperature for a specified locale. This will be a problem if we're not authorized to access the remote server through the crossdomain file. In most cases it won't even exist on the remote server. In a controlled environment this isn't a problem, however. If we have control of the server that provides the weather Web service, we can add the crossdomain file to grant access to authorized clients. For more information on configuring crossdomain files, visit www.macromedia.com/devnet/mx/flash/articles/fplayer_security_03.html.

Flash Remoting
With all the hype around the new Web service classes, developers seem to think Macromedia has forgotten about Remoting. This couldn't be further from the truth. The Flash Remoting components for ActionScript 2.0 were recently released - and they're larger than life. Nothing has changed in the underlying architecture of Remoting; the new components are just friendlier to ActionScript 2.0 developers. While Macromedia put a good amount of resources into the new Web service classes, this doesn't eliminate the need for Remoting.

If you've read any of my past ColdFusion Developer's Journal articles, then you probably know how much I rant and rave about Remoting. Yes, I'm a bit biased toward Remoting, but that's because I love CF and how nicely it integrates with Flash. All data that is transmitted between the Flash client and the application is serialized using the Action Message Format (AMF). AMF is a streamlined binary protocol that was modeled after SOAP. Flash Remoting automatically takes care of data type conversion from the server to the client and back again. Figure 2 illustrates a basic communications architecture with Flash Remoting.

Notice how Web services can still be introduced into this architecture. The application server can serve as a proxy between Flash and the Web service. An application server such as ColdFusion would invoke the remote method and return the data to the Flash client using Remoting. Taking this approach circumvents the crossdomain.xml security restriction.

As mentioned earlier, if you're dealing with large data sets and complex objects, then Flash Remoting is definitely worth a look. In most cases your performance will be better. If you're doing simple transactions such as retrieving stock quotes and weather data, then performance will be about the same or the difference will be too negligible to even notice.

One of the major drawbacks of Flash Remoting is the cost. The license runs $999 for a single-CPU license at the time of this writing. This is not an issue for CFMX developers (or Java/JSP developers using JRun 4) because Flash Remoting comes built in! If you are building enterprise applications with Flash but you're not on a CFMX server, then purchasing a Remoting license is a no-brainer. I can say from experience that it's worth every single penny for the performance you'll be gaining. Okay, enough talk; let's take a quick look at the application.

The File-Browsing Application
Although I've spent a good amount of your time talking about each technology, I'd like to walk you through a basic file-browsing application. If you'd like to download the source code for this application, please feel free to do so at www.sys-con.com/coldfusion/sourcec.cfm. View the README file to see how to configure the application. The application consists of a Tree component that allows you to select a folder and display its contents in a DataGrid component. Each time a tree node is clicked, a service call is made to the server for data. The ComboBox controls whether the service call is made using Web services or Flash Remoting. Figure 3 shows a screenshot of the application at work.

Web service and Flash Remoting objects are created with ActionScript in a similar manner. After the objects are created, a service method called getFiles is invoked. This method resides in a CFC called fileBrowser.cfc, which can be invoked through a Web service call and also through Flash Remoting. I want to take a quick second to say how truly amazing CF is. In less than 15 lines of code I can expose both a Web service and Flash Remoting method that can be consumed by a Flash client. If you've had experience exposing remote methods with any other technology, then you can truly appreciate how simple CF makes this.

After playing around with the application there are a couple of things that you'll most likely notice. Overall, the performance of Flash Remoting will be better than that of Web services. When retrieving a small number of data sets the difference will be negligible and not even worth noting. That's why the "Get All Records" button was added, because I think this truly demonstrates what I discussed earlier. Since we're dealing with what could be considered fairly complex objects (recordsets) and large amounts of data, you'll see that Flash Remoting truly outperforms Web services. While testing on my local machine it generally took the Web service classes 4-5 seconds to retrieve and display 783 records, while it took Flash Remoting less than a second. Play around with it and your results may vary!

Conclusion
In this article I touched the surface of Web services and Flash Remoting with a few pros and cons of each. There's definitely enough information on these two topics that an entire book could be devoted to them. I encourage you to download the sample application and test it, tweak it, and break it. I hope it will ultimately help give you enough information to decide which technology fits your needs, maybe one or the other, maybe both.

One area that I did not have a chance to touch upon is debugging. If you're interested in learning more, I recommend you take a look at the Log class for Web services and the NetConnection Debugger for Flash Remoting. If you'd like to learn more about the NetConnection Debugger, please check out my earlier article in CFDJ, Volume 4, issue 10. All in all, the future is bright for Flash and ColdFusion developers. Stay tuned!

More Stories By Dennis Baldwin

Dennis Baldwin is a software developer for SensorLogic Inc, an M2M application service provider. He also runs and maintains an online community for Flash and ColdFusion developers at www.devmx.com.

Comments (0)

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.


@ThingsExpo Stories
With an estimated 50 billion devices connected to the Internet by 2020, several industries will begin to expand their capabilities for retaining end point data at the edge to better utilize the range of data types and sheer volume of M2M data generated by the Internet of Things. In his session at @ThingsExpo, Don DeLoach, CEO and President of Infobright, will discuss the infrastructures businesses will need to implement to handle this explosion of data by providing specific use cases for filte...
SYS-CON Events announced today that Fusion, a leading provider of cloud services, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. Fusion, a leading provider of integrated cloud solutions to small, medium and large businesses, is the industry's single source for the cloud. Fusion's advanced, proprietary cloud service platform enables the integration of leading edge solutions in the cloud, including clou...
SYS-CON Events announced today that Commvault, a global leader in enterprise data protection and information management, has been named “Bronze Sponsor” of SYS-CON's 18th International Cloud Expo, which will take place on June 7–9, 2016, at the Javits Center in New York City, NY, and the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Commvault is a leading provider of data protection and information management...
SYS-CON Events announced today that Alert Logic, Inc., the leading provider of Security-as-a-Service solutions for the cloud, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. Alert Logic, Inc., provides Security-as-a-Service for on-premises, cloud, and hybrid infrastructures, delivering deep security insight and continuous protection for customers at a lower cost than traditional security solutions. Ful...
The cloud promises new levels of agility and cost-savings for Big Data, data warehousing and analytics. But it’s challenging to understand all the options – from IaaS and PaaS to newer services like HaaS (Hadoop as a Service) and BDaaS (Big Data as a Service). In her session at @BigDataExpo at @ThingsExpo, Hannah Smalltree, a director at Cazena, will provide an educational overview of emerging “as-a-service” options for Big Data in the cloud. This is critical background for IT and data profes...
SYS-CON Events announced today that VAI, a leading ERP software provider, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. VAI (Vormittag Associates, Inc.) is a leading independent mid-market ERP software developer renowned for its flexible solutions and ability to automate critical business functions for the distribution, manufacturing, specialty retail and service sectors. An IBM Premier Business Part...
Fortunately, meaningful and tangible business cases for IoT are plentiful in a broad array of industries and vertical markets. These range from simple warranty cost reduction for capital intensive assets, to minimizing downtime for vital business tools, to creating feedback loops improving product design, to improving and enhancing enterprise customer experiences. All of these business cases, which will be briefly explored in this session, hinge on cost effectively extracting relevant data from ...
As enterprises work to take advantage of Big Data technologies, they frequently become distracted by product-level decisions. In most new Big Data builds this approach is completely counter-productive: it presupposes tools that may not be a fit for development teams, forces IT to take on the burden of evaluating and maintaining unfamiliar technology, and represents a major up-front expense. In his session at @BigDataExpo at @ThingsExpo, Andrew Warfield, CTO and Co-Founder of Coho Data, will dis...
With the Apple Watch making its way onto wrists all over the world, it’s only a matter of time before it becomes a staple in the workplace. In fact, Forrester reported that 68 percent of technology and business decision-makers characterize wearables as a top priority for 2015. Recognizing their business value early on, FinancialForce.com was the first to bring ERP to wearables, helping streamline communication across front and back office functions. In his session at @ThingsExpo, Kevin Roberts...
SYS-CON Events announced today that Interoute, owner-operator of one of Europe's largest networks and a global cloud services platform, has been named “Bronze Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2015 at the Javits Center in New York, New York. Interoute is the owner-operator of one of Europe's largest networks and a global cloud services platform which encompasses 12 data centers, 14 virtual data centers and 31 colocation centers, with connections to 195 ad...
Most people haven’t heard the word, “gamification,” even though they probably, and perhaps unwittingly, participate in it every day. Gamification is “the process of adding games or game-like elements to something (as a task) so as to encourage participation.” Further, gamification is about bringing game mechanics – rules, constructs, processes, and methods – into the real world in an effort to engage people. In his session at @ThingsExpo, Robert Endo, owner and engagement manager of Intrepid D...
Eighty percent of a data scientist’s time is spent gathering and cleaning up data, and 80% of all data is unstructured and almost never analyzed. Cognitive computing, in combination with Big Data, is changing the equation by creating data reservoirs and using natural language processing to enable analysis of unstructured data sources. This is impacting every aspect of the analytics profession from how data is mined (and by whom) to how it is delivered. This is not some futuristic vision: it's ha...
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.
Learn how IoT, cloud, social networks and last but not least, humans, can be integrated into a seamless integration of cooperative organisms both cybernetic and biological. This has been enabled by recent advances in IoT device capabilities, messaging frameworks, presence and collaboration services, where devices can share information and make independent and human assisted decisions based upon social status from other entities. In his session at @ThingsExpo, Michael Heydt, founder of Seamless...
The IoT's basic concept of collecting data from as many sources possible to drive better decision making, create process innovation and realize additional revenue has been in use at large enterprises with deep pockets for decades. So what has changed? In his session at @ThingsExpo, Prasanna Sivaramakrishnan, Solutions Architect at Red Hat, discussed the impact commodity hardware, ubiquitous connectivity, and innovations in open source software are having on the connected universe of people, thi...
WebRTC: together these advances have created a perfect storm of technologies that are disrupting and transforming classic communications models and ecosystems. In his session at WebRTC Summit, Cary Bran, VP of Innovation and New Ventures at Plantronics and PLT Labs, provided an overview of this technological shift, including associated business and consumer communications impacts, and opportunities it may enable, complement or entirely transform.
For manufacturers, the Internet of Things (IoT) represents a jumping-off point for innovation, jobs, and revenue creation. But to adequately seize the opportunity, manufacturers must design devices that are interconnected, can continually sense their environment and process huge amounts of data. As a first step, manufacturers must embrace a new product development ecosystem in order to support these products.
There are so many tools and techniques for data analytics that even for a data scientist the choices, possible systems, and even the types of data can be daunting. In his session at @ThingsExpo, Chris Harrold, Global CTO for Big Data Solutions for EMC Corporation, showed how to perform a simple, but meaningful analysis of social sentiment data using freely available tools that take only minutes to download and install. Participants received the download information, scripts, and complete end-t...
Manufacturing connected IoT versions of traditional products requires more than multiple deep technology skills. It also requires a shift in mindset, to realize that connected, sensor-enabled “things” act more like services than what we usually think of as products. In his session at @ThingsExpo, David Friedman, CEO and co-founder of Ayla Networks, discussed how when sensors start generating detailed real-world data about products and how they’re being used, smart manufacturers can use the dat...
When it comes to IoT in the enterprise, namely the commercial building and hospitality markets, a benefit not getting the attention it deserves is energy efficiency, and IoT’s direct impact on a cleaner, greener environment when installed in smart buildings. Until now clean technology was offered piecemeal and led with point solutions that require significant systems integration to orchestrate and deploy. There didn't exist a 'top down' approach that can manage and monitor the way a Smart Buildi...