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

The Asynchronous CFML Gateway

A Real-World Example of a Great New Technology

One of the most powerful new features available in ColdFusion MX 7 Enterprise that many ColdFusion developers might not yet be using is event gateways. Event gateways open up entirely new possibilities for ColdFusion and allow our ColdFusion applications to communicate with more or less any other Internet-enabled system even if the system doesn't communicate via the "traditional" HTTP protocol.

CFMX 7 Enterprise ships with a few gateways to get you started, such as an SMS gateway for communicating with mobile devices, a directory watcher gateway, a socket gateway, a Java Message Service (JMS) gateway, and Jabber/XMMP as well as Lotus Sametime IM gateways, so you have a lot of possibilities right out of the box.

If you don't need the specific functionality offered by these gateways you might not have investigated them thoroughly and because the event gateways themselves are written in Java, creating new gateways may not be a high-priority item for many ColdFusion developers. But there is another gateway that ships with CFMX 7 Enterprise that ColdFusion developers can take advantage of right away, which offers numerous benefits in your ColdFusion applications. In this article I'd like to introduce you to the Asynchronous CFML Gateway, describe some of the great potential uses of the gateway, and show how I added an asynchronous CFML gateway to vastly improve the performance and functionality in an existing ColdFusion application.

The Asynchronous CFML Gateway
The purpose of the asynchronous CFML gateway is to allow developers to offload long-running processes to the gateway. The gateway immediately passes control back to the application and does it's processing behind the scenes. This means that your users will no longer have to wait for lengthy batch processes to complete before doing other things within the application. This is great for things like logging, which if you log a lot of data can really bog down your application since the user has to wait for the logging process to complete on each request.

Even if you have a process that runs behind the scenes that is initiated by the ColdFusion scheduler as opposed to by a user action, leveraging the asynchronous gateway can allow for the process to complete more quickly. For example, if you have a loop of some sort and the work done upon each iteration is fairly lengthy, by sending a message to the asynchronous gateway on each loop iteration the overall process doesn't need to wait for each iteration to complete before proceeding.

What allows this magic to be possible is the use of ColdFusion Components (CFCs) that operate within the event gateway environment as opposed to being tied to a specific request. By creating a CFC that contains a few specific methods (actually we'll concern ourselves with one method in particular - more on this in a moment) and registering the CFC as an event gateway instance in the ColdFusion administrator, the CFC can now operate independently of the traditional request/response model of web applications.

Bear in mind, however, that not all processes are suitable for use with the asynchronous event gateway. One big caveat here is that because the asynchronous process is detached from the request/response cycle, it isn't really feasible to provide feedback to the user in a traditional way such as sending the user to a confirmation page when a process completes. Also, if your application contains processes that occur sequentially and later processes rely on the results of preceding processes, then even if one of these processes is time-consuming this isn't a case in which use of the asynchronous gateway is possible. When you use the asynchronous gateway you essentially throw the process over the fence and give up control over when it completes and the ability to rely on the results of the asynchronous process.

The asynchronous CFC can however, do things such as log information to a file or database, send information via e-mail, or even send an instant message using the IM gateway, so by no means does the asynchronous CFC's processing disappear into a black hole.

In addition to these methods the event gateways can of course also use the cflog tag, which outputs information to a log that can be viewed from the ColdFusion administrator or directly in the log file itself. In the ColdFusion administrator's Debugging & Logging section you will also see an Event Gateway log that can provide information about what occurs inside your gateways. Finally, for some additional thoughts and methods by which to get feedback from asynchronous CFCs, please see Sean Corfield's blog entries about his Concurrency library under "Resources" at the end of this article.

If you haven't considered the power of asynchronous processing before, I'd be willing to bet the wheels are spinning and your head is filling with ideas of how you can leverage this power in your applications. Let's take a look at one real-world example that created dramatic improvements and was surprisingly easy to build.

Web-Based "E-Mail Blaster"
A few years ago I wrote a ColdFusion application for my company's marketing department that is used for generating and sending e-mail marketing campaigns. This application became affectionately known as the "E-Mail Blaster." Prior to the existence of the E-Mail Blaster our marketing team was literally cutting and pasting e-mail addresses from an Excel spreadsheet into the Lotus Notes e-mail client. Clearly not the most efficient way to do things given the fact that some of our larger batches of e-mail can top 50,000 recipients, and Notes has an upper limit of a few hundred recipients for each e-mail. (Before you declare me the Spam King of Texas, bear in mind that that our lists are entirely opt-in!)

When I saw how the marketing department was dealing with these e-mail campaigns I immediately knew that this was a perfect job for ColdFusion. ColdFusion Enterprise handles large volumes of e-mail extremely well, and it was quite simple to build a web-based interface for creating e-mail campaigns that saves countless hours of time versus the old cut-and-paste method. We use another tool to maintain contact lists, so the marketing team extracts the recipient list into an Excel spreadsheet. They then use the ColdFusion application to upload the Excel spreadsheet containing the recipients' e-mail addresses along with an HTML file containing the contents of the e-mail, and the E-mail Blaster handles the rest.

Hurry Up and Wait
The application was an immediate hit with the marketing department, but there was one drawback. Even as quickly as ColdFusion handles e-mail it still takes a bit of time to process 50,000 e-mails, and in the traditional request/response model of web applications this means the user of the application has to wait ... and wait ... and wait for the process to complete. This doesn't necessarily mean the user can't go do something else while it's processing, but people tend to get used to submitting a form and seeing a response relatively quickly so by force of habit the users of the E-mail Blaster tend to wait for a response from the application.

In a long-running process such as this the response can be substantially delayed, and this can cause problems ranging from simple annoyance to users resubmitting e-mail batches because they assume the process stopped or an error occurred. In the original version of the application there were problems with Internet Explorer refreshing the processing page automatically because I wasn't flushing anything to the screen during the send process. Once I discovered this issue I updated the application to flush each e-mail address to the screen as the e-mail was sent, which gave the user primitive feedback and also solved the auto-refresh issue with Internet Explorer.

More Stories By Matthew Woodward

Matt Woodward is Principal Information Technology Specialist with the Office of the Sergeant at Arms at the United States Senate. He was until recently a Web application developer for i2 Technologies in Dallas, Texas. A Macromedia Certified ColdFusion Developer and a member of Team Macromedia, he has been using ColdFusion since 1996. In addition to his ColdFusion work, Matt also develops in Java and PHP.

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
SYS-CON Events announced today that Cisco, the worldwide leader in IT that transforms how people connect, communicate and collaborate, has been named “Gold Sponsor” of 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. Cisco makes amazing things happen by connecting the unconnected. Cisco has shaped the future of the Internet by becoming the worldwide leader in transforming how people connect, communicate and collaborate. Cisco and our partners are building the platform for the Internet of Everything by connecting the...
Temasys has announced senior management additions to its team. Joining are David Holloway as Vice President of Commercial and Nadine Yap as Vice President of Product. Over the past 12 months Temasys has doubled in size as it adds new customers and expands the development of its Skylink platform. Skylink leads the charge to move WebRTC, traditionally seen as a desktop, browser based technology, to become a ubiquitous web communications technology on web and mobile, as well as Internet of Things compatible devices.
SYS-CON Events announced today that robomq.io 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. robomq.io is an interoperable and composable platform that connects any device to any application. It helps systems integrators and the solution providers build new and innovative products and service for industries requiring monitoring or intelligence from devices and sensors.
The WebRTC Summit 2014 New York, to be held June 9-11, 2015, at the Javits Center in New York, NY, announces that its Call for Papers is 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 16th International Cloud Expo, @ThingsExpo, Big Data Expo, and DevOps Summit.
Docker is an excellent platform for organizations interested in running microservices. It offers portability and consistency between development and production environments, quick provisioning times, and a simple way to isolate services. In his session at DevOps Summit at 16th Cloud Expo, Shannon Williams, co-founder of Rancher Labs, will walk through these and other benefits of using Docker to run microservices, and provide an overview of RancherOS, a minimalist distribution of Linux designed expressly to run Docker. He will also discuss Rancher, an orchestration and service discovery platf...
Wearable technology was dominant at this year’s International Consumer Electronics Show (CES) , and MWC was no exception to this trend. New versions of favorites, such as the Samsung Gear (three new products were released: the Gear 2, the Gear 2 Neo and the Gear Fit), shared the limelight with new wearables like Pebble Time Steel (the new premium version of the company’s previously released smartwatch) and the LG Watch Urbane. The most dramatic difference at MWC was an emphasis on presenting wearables as fashion accessories and moving away from the original clunky technology associated with t...
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.
SYS-CON Events announced today that Solgenia 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, and the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Solgenia is the global market leader in Cloud Collaboration and Cloud Infrastructure software solutions. Designed to “Bridge the Gap” between Personal and Professional Social, Mobile and Cloud user experiences, our solutions help large and medium-sized organizations dr...
SYS-CON Events announced today that Liaison Technologies, a leading provider of data management and integration cloud services and solutions, has been named "Silver Sponsor" of SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York, NY. Liaison Technologies is a recognized market leader in providing cloud-enabled data integration and data management solutions to break down complex information barriers, enabling enterprises to make smarter decisions, faster.
@ThingsExpo has been named the Top 5 Most Influential M2M Brand by Onalytica in the ‘Machine to Machine: Top 100 Influencers and Brands.' Onalytica analyzed the online debate on M2M by looking at over 85,000 tweets to provide the most influential individuals and brands that drive the discussion. According to Onalytica the "analysis showed a very engaged community with a lot of interactive tweets. The M2M discussion seems to be more fragmented and driven by some of the major brands present in the M2M space. This really allows some room for influential individuals to create more high value inter...
After making a doctor’s appointment via your mobile device, you receive a calendar invite. The day of your appointment, you get a reminder with the doctor’s location and contact information. As you enter the doctor’s exam room, the medical team is equipped with the latest tablet containing your medical history – he or she makes real time updates to your medical file. At the end of your visit, you receive an electronic prescription to your preferred pharmacy and can schedule your next appointment.
The world's leading Cloud event, Cloud Expo has launched Microservices Journal on the SYS-CON.com portal, featuring over 19,000 original articles, news stories, features, and blog entries. DevOps Journal is focused on this critical enterprise IT topic in the world of cloud computing. Microservices Journal offers top articles, news stories, and blog posts from the world's well-known experts and guarantees better exposure for its authors than any other publication. Follow new article posts on Twitter at @MicroservicesE
The list of ‘new paradigm’ technologies that now surrounds us appears to be at an all time high. From cloud computing and Big Data analytics to Bring Your Own Device (BYOD) and the Internet of Things (IoT), today we have to deal with what the industry likes to call ‘paradigm shifts’ at every level of IT. This is disruption; of course, we understand that – change is almost always disruptive.
SYS-CON Events announced today the IoT Bootcamp – Jumpstart Your IoT Strategy, being held June 9–10, 2015, in conjunction with 16th Cloud Expo and Internet of @ThingsExpo at the Javits Center in New York City. This is your chance to jumpstart your IoT strategy. Combined with real-world scenarios and use cases, the IoT Bootcamp is not just based on presentations but includes hands-on demos and walkthroughs. We will introduce you to a variety of Do-It-Yourself IoT platforms including Arduino, Raspberry Pi, BeagleBone, Spark and Intel Edison. You will also get an overview of cloud technologies s...
SYS-CON Events announced today that SafeLogic has been named “Bag Sponsor” of SYS-CON's 16th International Cloud Expo® New York, which will take place June 9-11, 2015, at the Javits Center in New York City, NY. SafeLogic provides security products for applications in mobile and server/appliance environments. SafeLogic’s flagship product CryptoComply is a FIPS 140-2 validated cryptographic engine designed to secure data on servers, workstations, appliances, mobile devices, and in the Cloud.
SOA Software has changed its name to Akana. With roots in Web Services and SOA Governance, Akana has established itself as a leader in API Management and is expanding into cloud integration as an alternative to the traditional heavyweight enterprise service bus (ESB). The company recently announced that it achieved more than 90% year-over-year growth. As Akana, the company now addresses the evolution and diversification of SOA, unifying security, management, and DevOps across SOA, APIs, microservices, and more.
GENBAND has announced that SageNet is leveraging the Nuvia platform to deliver Unified Communications as a Service (UCaaS) to its large base of retail and enterprise customers. Nuvia’s cloud-based solution provides SageNet’s customers with a full suite of business communications and collaboration tools. Two large national SageNet retail customers have recently signed up to deploy the Nuvia platform and the company will continue to sell the service to new and existing customers. Nuvia’s capabilities include HD voice, video, multimedia messaging, mobility, conferencing, Web collaboration, deskt...
SYS-CON Media announced today that @WebRTCSummit Blog, the largest WebRTC resource in the world, has been launched. @WebRTCSummit Blog offers top articles, news stories, and blog posts from the world's well-known experts and guarantees better exposure for its authors than any other publication. @WebRTCSummit Blog can be bookmarked ▸ Here @WebRTCSummit conference site can be bookmarked ▸ Here
SYS-CON Events announced today that Akana, formerly SOA Software, has been named “Bronze Sponsor” of SYS-CON's 16th International Cloud Expo® New York, which will take place June 9-11, 2015, at the Javits Center in New York City, NY. Akana’s comprehensive suite of API Management, API Security, Integrated SOA Governance, and Cloud Integration solutions helps businesses accelerate digital transformation by securely extending their reach across multiple channels – mobile, cloud and Internet of Things. Akana enables enterprises to share data as APIs, connect and integrate applications, drive part...
Cloud is not a commodity. And no matter what you call it, computing doesn’t come out of the sky. It comes from physical hardware inside brick and mortar facilities connected by hundreds of miles of networking cable. And no two clouds are built the same way. SoftLayer gives you the highest performing cloud infrastructure available. One platform that takes data centers around the world that are full of the widest range of cloud computing options, and then integrates and automates everything. Join SoftLayer on June 9 at 16th Cloud Expo to learn about IBM Cloud's SoftLayer platform, explore se...