|By Christophe Marton||
|February 7, 2012 02:31 PM EST||
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.
SYS-CON Events announced today that CA Technologies has been named “Platinum Sponsor” of SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY, and the 21st International Cloud Expo®, which will take place October 31-November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. CA Technologies helps customers succeed in a future where every business – from apparel to energy – is being rewritten by software. From ...
Mar. 27, 2017 02:00 PM EDT Reads: 1,965
In his session at @ThingsExpo, Eric Lachapelle, CEO of the Professional Evaluation and Certification Board (PECB), will provide an overview of various initiatives to certifiy the security of connected devices and future trends in ensuring public trust of IoT. Eric Lachapelle is the Chief Executive Officer of the Professional Evaluation and Certification Board (PECB), an international certification body. His role is to help companies and individuals to achieve professional, accredited and worldw...
Mar. 27, 2017 01:15 PM EDT Reads: 707
SYS-CON Events announced today that Loom Systems will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Founded in 2015, Loom Systems delivers an advanced AI solution to predict and prevent problems in the digital business. Loom stands alone in the industry as an AI analysis platform requiring no prior math knowledge from operators, leveraging the existing staff to succeed in the digital era. With offices in S...
Mar. 27, 2017 01:00 PM EDT Reads: 1,439
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 20th Cloud Expo, which will take place on June 6-8, 2017 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 add...
Mar. 27, 2017 12:45 PM EDT Reads: 1,332
SYS-CON Events announced today that T-Mobile will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. As America's Un-carrier, T-Mobile US, Inc., is redefining the way consumers and businesses buy wireless services through leading product and service innovation. The Company's advanced nationwide 4G LTE network delivers outstanding wireless experiences to 67.4 million customers who are unwilling to compromise on ...
Mar. 27, 2017 11:15 AM EDT Reads: 2,352
SYS-CON Events announced today that HTBase will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. HTBase (Gartner 2016 Cool Vendor) delivers a Composable IT infrastructure solution architected for agility and increased efficiency. It turns compute, storage, and fabric into fluid pools of resources that are easily composed and re-composed to meet each application’s needs. With HTBase, companies can quickly prov...
Mar. 27, 2017 10:30 AM EDT Reads: 2,995
SYS-CON Events announced today that Infranics will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Since 2000, Infranics has developed SysMaster Suite, which is required for the stable and efficient management of ICT infrastructure. The ICT management solution developed and provided by Infranics continues to add intelligence to the ICT infrastructure through the IMC (Infra Management Cycle) based on mathemat...
Mar. 27, 2017 10:30 AM EDT Reads: 3,122
SYS-CON Events announced today that Cloudistics, an on-premises cloud computing company, has been named “Bronze Sponsor” of SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Cloudistics delivers a complete public cloud experience with composable on-premises infrastructures to medium and large enterprises. Its software-defined technology natively converges network, storage, compute, virtualization, and management into a ...
Mar. 27, 2017 09:30 AM EDT Reads: 2,099
There are 66 million network cameras capturing terabytes of data. How did factories in Japan improve physical security at the facilities and improve employee productivity? Edge Computing reduces possible kilobytes of data collected per second to only a few kilobytes of data transmitted to the public cloud every day. Data is aggregated and analyzed close to sensors so only intelligent results need to be transmitted to the cloud. Non-essential data is recycled to optimize storage.
Mar. 27, 2017 08:15 AM EDT Reads: 3,087
"I think that everyone recognizes that for IoT to really realize its full potential and value that it is about creating ecosystems and marketplaces and that no single vendor is able to support what is required," explained Esmeralda Swartz, VP, Marketing Enterprise and Cloud at Ericsson, in this SYS-CON.tv interview at @ThingsExpo, held June 7-9, 2016, at the Javits Center in New York City, NY.
Mar. 27, 2017 08:00 AM EDT Reads: 4,323
SYS-CON Events announced today that Outlyer, a monitoring service for DevOps and operations teams, has been named “Bronze Sponsor” of SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Outlyer is a monitoring service for DevOps and Operations teams running Cloud, SaaS, Microservices and IoT deployments. Designed for today's dynamic environments that need beyond cloud-scale monitoring, we make monitoring effortless so you ...
Mar. 27, 2017 02:15 AM EDT Reads: 4,284
My team embarked on building a data lake for our sales and marketing data to better understand customer journeys. This required building a hybrid data pipeline to connect our cloud CRM with the new Hadoop Data Lake. One challenge is that IT was not in a position to provide support until we proved value and marketing did not have the experience, so we embarked on the journey ourselves within the product marketing team for our line of business within Progress. In his session at @BigDataExpo, Sum...
Mar. 27, 2017 01:45 AM EDT Reads: 3,031
Keeping pace with advancements in software delivery processes and tooling is taxing even for the most proficient organizations. Point tools, platforms, open source and the increasing adoption of private and public cloud services requires strong engineering rigor - all in the face of developer demands to use the tools of choice. As Agile has settled in as a mainstream practice, now DevOps has emerged as the next wave to improve software delivery speed and output. To make DevOps work, organization...
Mar. 27, 2017 01:15 AM EDT Reads: 1,959
DevOps is often described as a combination of technology and culture. Without both, DevOps isn't complete. However, applying the culture to outdated technology is a recipe for disaster; as response times grow and connections between teams are delayed by technology, the culture will die. A Nutanix Enterprise Cloud has many benefits that provide the needed base for a true DevOps paradigm.
Mar. 27, 2017 12:45 AM EDT Reads: 2,249
What sort of WebRTC based applications can we expect to see over the next year and beyond? One way to predict development trends is to see what sorts of applications startups are building. In his session at @ThingsExpo, Arin Sime, founder of WebRTC.ventures, will discuss the current and likely future trends in WebRTC application development based on real requests for custom applications from real customers, as well as other public sources of information,
Mar. 27, 2017 12:30 AM EDT Reads: 921
China Unicom exhibit at the 19th International Cloud Expo, which took place at the Santa Clara Convention Center in Santa Clara, CA, in November 2016. China United Network Communications Group Co. Ltd ("China Unicom") was officially established in 2009 on the basis of the merger of former China Netcom and former China Unicom. China Unicom mainly operates a full range of telecommunications services including mobile broadband (GSM, WCDMA, LTE FDD, TD-LTE), fixed-line broadband, ICT, data communica...
Mar. 27, 2017 12:00 AM EDT Reads: 3,434
With the introduction of IoT and Smart Living in every aspect of our lives, one question has become relevant: What are the security implications? To answer this, first we have to look and explore the security models of the technologies that IoT is founded upon. In his session at @ThingsExpo, Nevi Kaja, a Research Engineer at Ford Motor Company, will discuss some of the security challenges of the IoT infrastructure and relate how these aspects impact Smart Living. The material will be delivered i...
Mar. 26, 2017 09:45 PM EDT Reads: 2,125
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, represent...
Mar. 26, 2017 08:30 PM EDT Reads: 6,252
As organizations realize the scope of the Internet of Things, gaining key insights from Big Data, through the use of advanced analytics, becomes crucial. However, IoT also creates the need for petabyte scale storage of data from millions of devices. A new type of Storage is required which seamlessly integrates robust data analytics with massive scale. These storage systems will act as “smart systems” provide in-place analytics that speed discovery and enable businesses to quickly derive meaningf...
Mar. 26, 2017 07:45 PM EDT Reads: 9,697
Your homes and cars can be automated and self-serviced. Why can't your storage? From simply asking questions to analyze and troubleshoot your infrastructure, to provisioning storage with snapshots, recovery and replication, your wildest sci-fi dream has come true. In his session at @DevOpsSummit at 20th Cloud Expo, Dan Florea, Director of Product Management at Tintri, will provide a ChatOps demo where you can talk to your storage and manage it from anywhere, through Slack and similar services ...
Mar. 26, 2017 06:45 PM EDT Reads: 4,376