Welcome!

Apache Authors: Pat Romanski, Liz McMillan, Elizabeth White, Christopher Harrold, Janakiram MSV

Related Topics: Java IoT, Recurring Revenue, Apache

Java IoT: Blog Feed Post

Configuring Apache JMeter for Oracle's ADF 11g

Additional configurations required for JMeter

Sometime back I blogged about Stress & load testing web applications (even ADF & Apex) using Apache JMeter. That post dealt with the generic setup of recording a web session and then replaying under load via JMeter.

When considering using JMeter for JDeveloper 11g ADF applications there are additional JMeter configuration steps required beyond that detailed in the original post. As per the original post ADF passes around cookies to store the JSESSIONID, and you can use JMeter's HTTP Cookie Manager to correctly handle the cookie. However ADF also makes use of a number of parameters passed as HTTP POST parameters and URL parameters. On running an ADF application you'll often see URL parameters like _adf.ctrl-state, _afrLoop, and embedded within the HTTP bodies variables such as javax.faces.ViewState, used by ADF to coordinate state with the browser session. In order for JMeter to simulate multiple user sessions it needs to be correctly configured to handle these too, capturing and carrying the unique values for each session in the load test.

The following post lists the additional configurations required for JMeter beyond those described in the original post. As noted in the original post the easiest way to setup your JMeter Test Plan is to record an existing ADF session through JMeter's HTTP Proxy Server and I haven't bothered to reiterate those instructions here. In turn I've taken no effort to explain the JMeter features we're utilizing to do this; if you want to learn about the relevant JMeter features consult the JMeter User Manual.

Caveat for ADF 10g users: You'll note above I specifically stated JDeveloper 11g ADF, not 10g. I haven't tested any of the following settings for JDev 10g and I don't believe they'll work, as if memory serves me correctly the POST and URL parameters mechanisms changed between versions. However the following notes may give you enough information to dig around in a running 10g ADF application, looking at the HTTP Requests to work out what parameters to work with.

JMeter ADF Required Configurations
The following lists five additional objects and their settings. You need only create one of each for each Thread Group. The end result will look something like this:


a) HTTP Cookie Manager

Create via Test Plan -> Thread Group -> Right Click -> Add -> Config Element -> HTTP Cookie Manager

Name: HTTP Cookie Manager
Clear cookies each iteration: Selected


b) User Defined Variables

Create via Test Plan -> Thread Group -> Right Click -> Add -> Config Element -> User Defined Variables

Name: ADF Variables
Variable Name: afrLoop
Variable Name: afrWindowId
Variable Name: jsessionId
Variable Name: adf.ctrl-state
Variable Name: javax.faces.ViewState


No initial values.
c) Regular Expression Extractor #1

Create via Test Plan -> Thread Group -> Right Click -> Add -> Post Processors -> Regular Expression Extractor

Name: adf.ctrl-state Extractor
Response Field to Check: Body
Reference Name: adf.ctrl-state
Regular Expression: _adf.ctrl-state=([-_0-9A-Za-z!]{10,13})
Template: $1$
Match No.: 1
Default Value: n/a


Take notice that the variable name does not include an underscore in it's name unlike the actual parameter _adf.ctrl-state.

d) Regular Expression Extractor #2

Create via Test Plan -> Thread Group -> Right Click -> Add -> Post Processors -> Regular Expression Extractor

Name: afrLoop Extractor
Response Field to Check: Body
Reference Name: afrLoop
Regular Expression: _afrLoop=([-_0-9A-Za-z]{13,16})
Template: $1$
Match No.: 1
Default Value: n/a


Take notice that the variable name does not include an underscore in it's name unlike the actual parameter _afrLoop.

d) Regular Expression Extractor #3

Create via Test Plan -> Thread Group -> Right Click -> Add -> Post Processors -> Regular Expression Extractor

Name: afrWindowId Extractor
Response Field to Check: Body
Reference Name: afrWindowId
Regular Expression: window.name='([-_0-9A-Za-z!]{10,13})'
Template: $1$
Match No.: 1
Default Value: n/a


e) Regular Expression Extractor #4

Create via Test Plan -> Thread Group -> Right Click -> Add -> Post Processors -> Regular Expression Extractor

Name: javax.faces.ViewState Extractor
Response Field to Check: Body
Reference Name: javax.faces.ViewState
Regular Expression: <input type="hidden" name="javax\.faces\.ViewState" value="!(.+?)">
Template: $1$
Match No.: 1
Default Value: n/a


f) Regular Expression Extractor #5

Create via Test Plan -> Thread Group -> Right Click -> Add -> Post Processors -> Regular Expression Extractor

Name: jsesssionId Extractor
Response Field to Check: Body
Reference Name: jsessionId
Regular Expression: ;jsessionid=([-_0-9A-Za-z!]{63})
Template: $1$
Match No.: 1
Default Value: n/a


Recorded HTTP Request Changes

After recording an ADF session in JMeter, and setting up the variables above, you'll note in the recorded HTTP Requests numerous references to the same named variables as HTTP parameters. Yet the recorded HTTP Requests include the parameters' values for the recorded session, which simply won't work when we replay the session as the values will have changed.


It is therefore necessary to identify all locations where the parameters exist in the recorded session HTTP Requests and substitute references to your variables.

a) HTTP Request – Path – any path that makes reference to jsessionId must be changed.

ie: /SageApp/faces/ViewEvents;jsessionId=${jsessionId}


b) HTTP Request – Path – ditto any path that makes reference to _adf.ctrl-state must be changed.

ie. /SageApp/faces/ViewEvents?_adf.ctrl-state=${adf.ctrl-state}


You can also change this in the name if you want but it wont make a different to the overall result, the name is for show only.

c) HTTP Request – Parameters – for any of the following parameters:

_adf.ctrl-state
_afrLoop
_afrWindowId (* see exception at the end of this step)

...for their values substitute the relevant variable. The following example shows the values for the afrLoop and adf.ctrl-state replaced:


However there is one exception with _afrWindowId. In one of the initial requests its value will be the literal string "null" (see the picture in step (a) for an example). Do not replace this, leave it as null.

d) HTTP Request – Parameters – for the "javax.faces.ViewState" parameter, ditto replace its values. Note it is necessary to put a not (negate) symbol in front of it:

ie. !${javax.faces.ViewState}

In addition by default the "Encode?" parameter will be on for each javax.faces.ViewState. Instead turn it off for each:


e) HTTP Request – Parameters – for the "unique" parameter, occurring in the Path and request parameters replace it with the following notation:

${__javaScript(new Date().getTime(),DUMMY)}

Note there is no JMeter user variable for this, we just write it straight into the unique value.

f) HTTP Header Manager Referer – if the HTTP session has been recorded via JMeter's HTTP Proxy, each HTTP Request will include a sub-element HTTP Header Manager that includes an element called Referer. You'll note it will have hardcoded many of the parameters discussed above. However I don't think ADF requires the Referer element and you can just ignore it or delete it from every HTTP Header Manager.

Assertions

Once you've completed the above setup and want to run your load test via JMeter, it is important to see that the test is working correctly. One way to do this is to create a View Results Tree (Test Plan -> Thread Group -> Right Click -> Add -> Listener -> View Results Tree) that allows you to inspect the response of each HTTP Request. If you then see HTTP Request responses in red this indicates a HTTP error code response (!= 200). However it's also necessary to inspect each response even if they are green to see if there's a valid response returned carrying an error message. There is definitely a small knack to differentiating between the different type of failures in an ADF application, which you'll become familiar with on some experience.

In order to save you having to look for the same problems for each test-run, you can create a Response Assertion (Test Plan -> Thread Group -> Add -> Assertions -> Response Assertion) to look for specific errors in the responses. From my own ADF experience you want to setup a Response Assertion with the following values:

Which Samples to Test: Main Sample Only
Response Field to Test: Text Response
Pattern Matching Rules: Contains
Not: Selected
Patterns to Test #1: The following exception occurred
Patterns to Test #2: Server Exception during PPR
Patterns to Test #3: ADFC-12000
Patterns to Test #4: java.net.SocketException
Patterns to Test #5: java.io.IOException


This isn't a definitive list, and in turn there may be specific errors that you may want to pick up for your application.

Sample JMeter file
Readers can download a sample JMeter JMX file for ADF here with the configurations already setup.

Finishing Comment
I haven't had the chance to test this in every ADF scenario or application. It's possible in your application, dependent on the components you're using or some other trick of ADF, that I've missed one of the state values it wants the browser to carry. With the post above hopefully you'll get an idea of the majority and be able to identify more. I'd appreciate it if anybody finds more that we need to cater for please post a comment with your findings to assist other readers.

Read the original blog entry...

More Stories By Chris Muir

Chris Muir, an Oracle ACE Director, senior developer and trainer, and frequent blogger at http://one-size-doesnt-fit-all.blogspot.com, has been hacking away as an Oracle consultant with Australia's SAGE Computing Services for too many years. Taking a pragmatic approach to all things Oracle, Chris has more recently earned battle scars with JDeveloper, Apex, OID and web services, and has some very old war-wounds from a dark and dim past with Forms, Reports and even Designer 100% generation. He is a frequent presenter and contributor to the local Australian Oracle User Group scene, as well as a contributor to international user group magazines such as the IOUG and UKOUG.

@ThingsExpo Stories
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...
DXWorldEXPO LLC announced today that All in Mobile, a mobile app development company from Poland, will exhibit at the 22nd International CloudEXPO | DXWorldEXPO. All In Mobile is a mobile app development company from Poland. Since 2014, they maintain passion for developing mobile applications for enterprises and startups worldwide.
DXWorldEXPO LLC announced today that ICC-USA, a computer systems integrator and server manufacturing company focused on developing products and product appliances, will exhibit at the 22nd International CloudEXPO | DXWorldEXPO. DXWordEXPO New York 2018, colocated with CloudEXPO New York 2018 will be held November 11-13, 2018, in New York City. ICC is a computer systems integrator and server manufacturing company focused on developing products and product appliances to meet a wide range of ...
We are seeing a major migration of enterprises applications to the cloud. As cloud and business use of real time applications accelerate, legacy networks are no longer able to architecturally support cloud adoption and deliver the performance and security required by highly distributed enterprises. These outdated solutions have become more costly and complicated to implement, install, manage, and maintain.SD-WAN offers unlimited capabilities for accessing the benefits of the cloud and Internet. ...
Headquartered in Plainsboro, NJ, Synametrics Technologies has provided IT professionals and computer systems developers since 1997. Based on the success of their initial product offerings (WinSQL and DeltaCopy), the company continues to create and hone innovative products that help its customers get more from their computer applications, databases and infrastructure. To date, over one million users around the world have chosen Synametrics solutions to help power their accelerated business or per...
Dion Hinchcliffe is an internationally recognized digital expert, bestselling book author, frequent keynote speaker, analyst, futurist, and transformation expert based in Washington, DC. He is currently Chief Strategy Officer at the industry-leading digital strategy and online community solutions firm, 7Summits.
Founded in 2000, Chetu Inc. is a global provider of customized software development solutions and IT staff augmentation services for software technology providers. By providing clients with unparalleled niche technology expertise and industry experience, Chetu has become the premiere long-term, back-end software development partner for start-ups, SMBs, and Fortune 500 companies. Chetu is headquartered in Plantation, Florida, with thirteen offices throughout the U.S. and abroad.
Bill Schmarzo, author of "Big Data: Understanding How Data Powers Big Business" and "Big Data MBA: Driving Business Strategies with Data Science," is responsible for setting the strategy and defining the Big Data service offerings and capabilities for EMC Global Services Big Data Practice. As the CTO for the Big Data Practice, he is responsible for working with organizations to help them identify where and how to start their big data journeys. He's written several white papers, is an avid blogge...
I think DevOps is now a rambunctious teenager - it's starting to get a mind of its own, wanting to get its own things but it still needs some adult supervision," explained Thomas Hooker, VP of marketing at CollabNet, in this SYS-CON.tv interview at DevOps Summit at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.
"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.
Major trends and emerging technologies – from virtual reality and IoT, to Big Data and algorithms – are helping organizations innovate in the digital era. However, to create real business value, IT must think beyond the ‘what’ of digital transformation to the ‘how’ to harness emerging trends, innovation and disruption. Architecture is the key that underpins and ties all these efforts together. In the digital age, it’s important to invest in architecture, extend the enterprise footprint to the cl...
Data is the fuel that drives the machine learning algorithmic engines and ultimately provides the business value. In his session at Cloud Expo, Ed Featherston, a director and senior enterprise architect at Collaborative Consulting, discussed the key considerations around quality, volume, timeliness, and pedigree that must be dealt with in order to properly fuel that engine.
Two weeks ago (November 3-5), I attended the Cloud Expo Silicon Valley as a speaker, where I presented on the security and privacy due diligence requirements for cloud solutions. Cloud security is a topical issue for every CIO, CISO, and technology buyer. Decision-makers are always looking for insights on how to mitigate the security risks of implementing and using cloud solutions. Based on the presentation topics covered at the conference, as well as the general discussions heard between sessio...
IoT is rapidly becoming mainstream as more and more investments are made into the platforms and technology. As this movement continues to expand and gain momentum it creates a massive wall of noise that can be difficult to sift through. Unfortunately, this inevitably makes IoT less approachable for people to get started with and can hamper efforts to integrate this key technology into your own portfolio. There are so many connected products already in place today with many hundreds more on the h...
No hype cycles or predictions of zillions of things here. IoT is big. You get it. You know your business and have great ideas for a business transformation strategy. What comes next? Time to make it happen. In his session at @ThingsExpo, Jay Mason, Associate Partner at M&S Consulting, presented a step-by-step plan to develop your technology implementation strategy. He discussed the evaluation of communication standards and IoT messaging protocols, data analytics considerations, edge-to-cloud tec...
DXWorldEXPO LLC announced today that the upcoming DXWorldEXPO | CloudEXPO New York event will feature 10 companies from Poland to participate at the "Poland Digital Transformation Pavilion" on November 12-13, 2018.
Digital Transformation is much more than a buzzword. The radical shift to digital mechanisms for almost every process is evident across all industries and verticals. This is often especially true in financial services, where the legacy environment is many times unable to keep up with the rapidly shifting demands of the consumer. The constant pressure to provide complete, omnichannel delivery of customer-facing solutions to meet both regulatory and customer demands is putting enormous pressure on...
CloudEXPO | DXWorldEXPO are the world's most influential, independent events where Cloud Computing was coined and where technology buyers and vendors meet to experience and discuss the big picture of Digital Transformation and all of the strategies, tactics, and tools they need to realize their goals. Sponsors of DXWorldEXPO | CloudEXPO benefit from unmatched branding, profile building and lead generation opportunities.
The best way to leverage your CloudEXPO | DXWorldEXPO presence as a sponsor and exhibitor is to plan your news announcements around our events. The press covering CloudEXPO | DXWorldEXPO will have access to these releases and will amplify your news announcements. More than two dozen Cloud companies either set deals at our shows or have announced their mergers and acquisitions at CloudEXPO. Product announcements during our show provide your company with the most reach through our targeted audienc...
@DevOpsSummit at Cloud Expo, taking place November 12-13 in New York City, NY, is co-located with 22nd international CloudEXPO | first international DXWorldEXPO and will feature technical sessions from a rock star conference faculty and the leading industry players in the world.