Welcome!

Adobe Flex Authors: Matthew Lobas, PR.com Newswire, Shelly Palmer, Kevin Benedict

Related Topics: Adobe Flex, Java IoT, Machine Learning

Adobe Flex: Article

Three Tips to Successfully Load Test Adobe Flex Applications

It has become increasingly important to performance test these web applications under different loads

The world has changed dramatically for organizations that use web-enabled business applications in enterprise environments. The complexities of modern applications, which include multi-tiered, globally distributed architectures, SOA and a host of other new technologies, have forced major change in the way enterprises develop, test and manage web-enabled applications. Specifically, Rich Internet Application (RIA) technologies such as Adobe Flex allow a faster, more engaging, interactive experience with browser- enabled applications and services. While an attractive option for developing expanded application capabilities these RIA technologies bring new challenges to organizations that need to deploy application features and functions in a compressed time frame and at a lower cost.

Preparing for the shift as part of this new technology trend, companies must adapt their testing approach as well. Given the way new technologies work when deployed on Onternet/intranet applications, it's important to be careful in approaching the testing of Flex applications. When rolling out next-generation applications on a mission-critical enterprise application platform, you need to be confident that your systems will perform. As load testing is one of the last crucial tasks before launching a web application, it's usually done under pressure and with tight time constraints. Before we discuss tips to make you successful when load testing Adobe Flex applications, first let's look at how Adobe Flex applications are unique.

Adobe Flex applications may be different from applications you've worked with before. For classic HTML web applications, the server does all of the processing. In addition, the rendering of HTML requires full page refreshes. Flex applications are different because content is delivered without having to reload the page. These applications download the Flash client application and run in the browser, or for Adobe AIR applications, on the desktop. The Flash is constantly being updated by the server, asynchronously. For this reason, Adobe Flex server loads reveal a very different profile.

We all know it is important to measure transaction response times when performance testing web appli­cations. But Flex technology can cause significant increases in the number of browser-to-server HTTP calls made in the background and this increase in traffic can have a profound effect on per­formance. While users might not be aware of the round-trips between the browser and a distant server, they will definitely notice performance a problem if the application is slow or doesn't work because of the increased load. Knowing the scalability limitations of your deployments is crucial.

Innovative RIA technologies like Flex present new challenges with respect to emulating a realistic load. If you're developing or deploying applications in this newer technology, successfully addressing these challenges requires thinking about load testing in new ways. Let's look at the new challenges in load testing Flex applications and three tips to improve application performance and enrich the user experience.

Tip 1: Make sure you can decode AMF and process internal identifiers
Adobe's Flex AMF (Action Messaging Format) protocol is used to exchange data between an Adobe Flash application and a database, using a Remote Procedure call. Since the data is in compressed binary format, communication is faster and more efficient than a web service. Older load testing solutions claim they can handle "Flex" technology, but have difficulty doing so in the real world. Many load testing tools rely on data being sent over HTTP and don't tap into the AMF protocol. Therefore, they don't go deep enough to understand what is being exchanged between client and server. For optimum testing, make sure your load testing tool decodes these objects so that you can parameterize the requests, extract data from the response and validate the response. Users should look for automated variable extraction and parameterization, automated comparison features to show changes from one code base to the next and automated documentation of results so test output is immediately actionable by all stakeholders.

In addition, AMF message protocol uses internal identifiers (clientId, DSId, etc.) to maintain the AMF session. Parameters in an AMF session are dynamically generated and are numerous. To avoid painful manual configuration of these parameters, make sure that your load testing tool automatically processes serialized objects and identifiers.

Tip 2: Make sure you can support customized external messages
AMF3 compact binary format helps integrate binary data exchange into all server platforms. The protocol improves the quality of all remote and messaging solutions for Flex and optimizes data exchange. AMF3 reduces the quantity of exchanged information and avoids redundant messages. In particular, AMF3 externalizable messages allow developers to customize the serialization of objects exchanged in AMF.

When selecting a load testing tool, make sure it allows you to integrate custom code into it. For optimum testing, the customized code should be loaded and run by the testing tool to correctly replay custom messages.

Tip 3: Make sure you can support polling and streaming
Many Flex applications require that some data are regularly pushed from the server to the client. Servers using AMF protocol update client data in two ways:

  • The polling method: This is when the browser queries the server at regular intervals. Technically simple in its implementation, the method's downside is that it needlessly overloads the server and is not very reactive. When these applications are recorded with a load testing tool, a high number of browsers to server requests are recorded along with other more significant requests. It's important to make sure your tool can automatically simplify your recording to get a clear maintainable script.
  • The streaming method: In this case, the client sends a single request to the server and the server responds when pertinent information is available, without closing the request. The server can send information to the client again using the same connection, without having to wait for a new request. Using this method, client data can be rapidly updated while network traffic is kept to a minimum. The testing tool must be able to keep the stream open when it plays a streaming request. This request will block the connection so the tool has to use a second connection for classic requests.

In both cases, typical HTTP response times are not useful. For regular HTTP requests, load testing tools measure the time between when the request is sent and when the response is received. It's important that your load testing tool can measure what's really interesting: the time between when the server updates the client and when the client receives the update. Not only should the tool measure this information but this function should be automated so that testing can be done frequently and earlier in the lifecycle.

As more and more companies deploy mission-critical applications on the Internet, it has become increasingly important to performance test these web applications under different loads before they go live. While Adobe Flex provides expanded capabilities to develop new powerful applications in support of organizational needs, the technology is different from other applications. As a result a new approach to load testing is required. To understand how your applications will work in the Adobe Flex production environment, and to optimize them for higher performance, you need be able to simulate not just the actions of one user, but the actions of many users. By implementing the tips in this article, companies can quickly adapt their testing methodology to handle Flex applications, get to market faster and easier than ever before, while improving productivity and saving money.

More Stories By Christophe Marton

Christophe Marton is co-founder of Neotys and co-creator of the development tool NeoLoad. Previously, he worked at Calendra where he developed his expertise in the performance and load testing space, for which he ultimately developed a unique vision for a next generation solution. While at Calendra, he developed software solutions for the identity management market which was later acquired by BMC software in 2005. During his six year tenure at Calendra, he developed the skills required to create, develop and take cutting edge software to market. Marton is a Computer Engineering graduate of ESIL Marseille Engineering School.

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
"Space Monkey by Vivent Smart Home is a product that is a distributed cloud-based edge storage network. Vivent Smart Home, our parent company, is a smart home provider that places a lot of hard drives across homes in North America," explained JT Olds, Director of Engineering, and Brandon Crowfeather, Product Manager, at Vivint Smart Home, in this SYS-CON.tv interview at @ThingsExpo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
SYS-CON Events announced today that Conference Guru has been named “Media Sponsor” of the 22nd International Cloud Expo, which will take place on June 5-7, 2018, at the Javits Center in New York, NY. A valuable conference experience generates new contacts, sales leads, potential strategic partners and potential investors; helps gather competitive intelligence and even provides inspiration for new products and services. Conference Guru works with conference organizers to pass great deals to gre...
The Internet of Things will challenge the status quo of how IT and development organizations operate. Or will it? Certainly the fog layer of IoT requires special insights about data ontology, security and transactional integrity. But the developmental challenges are the same: People, Process and Platform. In his session at @ThingsExpo, Craig Sproule, CEO of Metavine, demonstrated how to move beyond today's coding paradigm and shared the must-have mindsets for removing complexity from the develop...
In his Opening Keynote at 21st Cloud Expo, John Considine, General Manager of IBM Cloud Infrastructure, led attendees through the exciting evolution of the cloud. He looked at this major disruption from the perspective of technology, business models, and what this means for enterprises of all sizes. John Considine is General Manager of Cloud Infrastructure Services at IBM. In that role he is responsible for leading IBM’s public cloud infrastructure including strategy, development, and offering m...
"Evatronix provides design services to companies that need to integrate the IoT technology in their products but they don't necessarily have the expertise, knowledge and design team to do so," explained Adam Morawiec, VP of Business Development at Evatronix, in this SYS-CON.tv interview at @ThingsExpo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
To get the most out of their data, successful companies are not focusing on queries and data lakes, they are actively integrating analytics into their operations with a data-first application development approach. Real-time adjustments to improve revenues, reduce costs, or mitigate risk rely on applications that minimize latency on a variety of data sources. In his session at @BigDataExpo, Jack Norris, Senior Vice President, Data and Applications at MapR Technologies, reviewed best practices to ...
Widespread fragmentation is stalling the growth of the IIoT and making it difficult for partners to work together. The number of software platforms, apps, hardware and connectivity standards is creating paralysis among businesses that are afraid of being locked into a solution. EdgeX Foundry is unifying the community around a common IoT edge framework and an ecosystem of interoperable components.
Large industrial manufacturing organizations are adopting the agile principles of cloud software companies. The industrial manufacturing development process has not scaled over time. Now that design CAD teams are geographically distributed, centralizing their work is key. With large multi-gigabyte projects, outdated tools have stifled industrial team agility, time-to-market milestones, and impacted P&L stakeholders.
"Akvelon is a software development company and we also provide consultancy services to folks who are looking to scale or accelerate their engineering roadmaps," explained Jeremiah Mothersell, Marketing Manager at Akvelon, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
"IBM is really all in on blockchain. We take a look at sort of the history of blockchain ledger technologies. It started out with bitcoin, Ethereum, and IBM evaluated these particular blockchain technologies and found they were anonymous and permissionless and that many companies were looking for permissioned blockchain," stated René Bostic, Technical VP of the IBM Cloud Unit in North America, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Conventi...
In his session at 21st Cloud Expo, Carl J. Levine, Senior Technical Evangelist for NS1, will objectively discuss how DNS is used to solve Digital Transformation challenges in large SaaS applications, CDNs, AdTech platforms, and other demanding use cases. Carl J. Levine is the Senior Technical Evangelist for NS1. A veteran of the Internet Infrastructure space, he has over a decade of experience with startups, networking protocols and Internet infrastructure, combined with the unique ability to it...
22nd International Cloud Expo, taking place June 5-7, 2018, at the Javits Center in New York City, NY, and co-located with the 1st DXWorld Expo 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 ...
"Cloud Academy is an enterprise training platform for the cloud, specifically public clouds. We offer guided learning experiences on AWS, Azure, Google Cloud and all the surrounding methodologies and technologies that you need to know and your teams need to know in order to leverage the full benefits of the cloud," explained Alex Brower, VP of Marketing at Cloud Academy, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clar...
Gemini is Yahoo’s native and search advertising platform. To ensure the quality of a complex distributed system that spans multiple products and components and across various desktop websites and mobile app and web experiences – both Yahoo owned and operated and third-party syndication (supply), with complex interaction with more than a billion users and numerous advertisers globally (demand) – it becomes imperative to automate a set of end-to-end tests 24x7 to detect bugs and regression. In th...
"MobiDev is a software development company and we do complex, custom software development for everybody from entrepreneurs to large enterprises," explained Alan Winters, U.S. Head of Business Development at MobiDev, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
Coca-Cola’s Google powered digital signage system lays the groundwork for a more valuable connection between Coke and its customers. Digital signs pair software with high-resolution displays so that a message can be changed instantly based on what the operator wants to communicate or sell. In their Day 3 Keynote at 21st Cloud Expo, Greg Chambers, Global Group Director, Digital Innovation, Coca-Cola, and Vidya Nagarajan, a Senior Product Manager at Google, discussed how from store operations and ...
"There's plenty of bandwidth out there but it's never in the right place. So what Cedexis does is uses data to work out the best pathways to get data from the origin to the person who wants to get it," explained Simon Jones, Evangelist and Head of Marketing at Cedexis, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
SYS-CON Events announced today that CrowdReviews.com has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5–7, 2018, at the Javits Center in New York City, NY. CrowdReviews.com is a transparent online platform for determining which products and services are the best based on the opinion of the crowd. The crowd consists of Internet users that have experienced products and services first-hand and have an interest in letting other potential buye...
SYS-CON Events announced today that Telecom Reseller has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5-7, 2018, at the Javits Center in New York, NY. Telecom Reseller reports on Unified Communications, UCaaS, BPaaS for enterprise and SMBs. They report extensively on both customer premises based solutions such as IP-PBX as well as cloud based and hosted platforms.
It is of utmost importance for the future success of WebRTC to ensure that interoperability is operational between web browsers and any WebRTC-compliant client. To be guaranteed as operational and effective, interoperability must be tested extensively by establishing WebRTC data and media connections between different web browsers running on different devices and operating systems. In his session at WebRTC Summit at @ThingsExpo, Dr. Alex Gouaillard, CEO and Founder of CoSMo Software, presented ...