Three Internal Architectures—Designs for DataPower Deployments
I have been in several different shops that are either deploying DataPower or are a few years after deploying DataPower. I’ve also had opportunities to talk to numerous different DataPower technical resources about how they have utilized DataPower. In the post, I want to describe what I’ve seen as…
OSI 7-Layer Network Model
I’ve been playing with Cisco switches and routers recently at home to get a handle on VLANs-more about VLANs later. Some people I know who have gotten involved in DataPower started out in system administration or networking and worked their way up the technology stack to SOA Appliances (WebSphere…
Symmetric Keys—Addendum
A couple of weeks ago I wrote a brief post about how to generate symmetric keys that can be used with DataPower. It demonstrates how to generate shared keys of various lengths using the Unix dd command. Today, someone asked how a shared key (or symmetric key) can be generated using the openssl…
IBM Impact 2012 Client Panel: Experiences with IBM SOA Stack Rollout
I will be leading a discussion panel at IBM Impact 2012 in Las Vegas on Monday, April 30th, 3:45-4pm. More information can be found here. It will be an open ended discussion and Q&A session detailing experiences rolling out IBM technology for an ESB. I’ve done this at a couple of different…
DataPower Extension Functions and Elements
Anyone who has spent time working with DataPower has had to write an XSLT stylesheet at some point. DataPower provides a library of functions and elements that provide access to various DataPower functionality.
XSLT & XPath
XSLT is the only scripting language supported by WebSphere DataPower appliances. It is the only way to customize DataPower functionality and behavior. So, anyone that works with DataPower for a while will sooner be writing XSLT stylesheets.
Sample Stylesheet—Starting Point
I often have to go back and look up these details; so, I decided to post a standard starting point for a new stylesheet.
Protocol Transformations
Previously, I wrote a Wire Protocols post that outlined the common protocols that I’ve encountered when working with ESBs and SOA technology-especially DataPower. A primary function of an ESB is to provide the ability to convert service requests between these different protocols in a mostly…
Generating and Uploading a Shared Key (Symmetric Key) to DataPower Appliances
DataPower does not seem to provide a tool to generate a Shared Key that can be used with 3DES or AES algorithms. DataPower does provide a tool for generating X509 private keys, certificate requests, and self-signed certificates-in the Crypto Tools section-but we are concerned with Shared Keys…
Service Mediation vs. Service Orchestration
I’ve wanted to define this term for a while, but, someone beat me to it several years ago. I generally agree with what these guys have to say. These terms are still in use today at client sites where DataPower and the IBM SOA stack is being deployed. Service Mediation logic is the application of…
Data Transformations
In a previous post, I described the different types of Data Formats that are commonly used with ESBs, XML Gateways, and SOA. Converting from one format to another is a common task performed by an ESB or XML Gateway. One can make arguments either way about whether this functionality should exist in…
Data Formats
To follow up on the Wire Protocol post, the next logical step in our SOA exploration is Data Formats. A web service message’s Data Format describes how the data is organized in the message.