Welcome!

Industrial IoT Authors: Elizabeth White, Liz McMillan, Scott Allen, Jonathan Fries, William Schmarzo

Blog Feed Post

SOAP-to-REST with Parameterized URLs and content-based routing using the Vordel API Server

The world is moving from SOAP to REST. Many applications continue to send old-style SOAP messages. Therefore, a very common usage of the Vordel API Server is to convert from legacy SOAP messages into REST API calls. This provides the best of both worlds: (1) Existing SOAP apps continue to work and don't have to be re-coded, and (2) going forward, REST APIs are used instead.

I've put together an example of this below. In this case, I'm using the common Parlay-X format which is SOAP-based, and I'm converting to the GSMA OneAPI, which is a REST API. The example I'm using is the common "amountCharging" service, which, here in Vordel, we often encounter with our telecoms customers [Side note: Here is some information about how BT, 3 UK, Telefonica, and TIM Brasil are using Vordel with their telecoms services]. 

Here's an example of a legacy SOAP message to our Parlay-X API:


<?xml version="1.0" encoding="UTF-8" standalone="no"?> <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> <soap:Body> <par2:chargeAmount xmlns:par2="http://www.csapi.org/schema/parlayx/payment/amount_charging/v2_1/local"> <!-- Element must appear exactly once --> <par2:endUserIdentifier>www.abc.com</par2:endUserIdentifier> <!-- Element must appear exactly once --> <par2:charge> <!-- Element must appear exactly once --> <description>a</description> <!-- Zero or one occurrences --> <currency>a</currency> <!-- Zero or one occurrences --> <amount>1.0</amount> <!-- Zero or one occurrences --> <code>a</code> </par2:charge> <!-- Element must appear exactly once --> <par2:referenceCode>a</par2:referenceCode> </par2:chargeAmount> </soap:Body> </soap:Envelope>


You can see above that this is a charge for some "Game Currency", of the amount of 25 US Dollars. 

We want to convert this to a REST API call like this:

http://api.myhostname.com/1/payment/6175551234/transactions/amount

You might notice, in the example, that the "endUserIdentifier" value in the SOAP message must be mapped into part of the URL used by the REST API. This is sometimes called a "Parameterized URL", or REST API parameterization.

Let's see how this is configured at the Vordel API Server...

The first step is to register the Parlay-X WSDL. I am doing this within the API Server's Repository, which I am accessing using the Policy Studio (Under "API Server" -> "Business Services", then right-clicking on the group I want to import the service into, and selecting "Register Web Service"). 



I am choosing the "chargeAmount" operation, as shown above, by selecting it. I simply follow through the rest of the steps as default, and for the final step, I'm choosing to deploy under a group called "Default Services", which has a number of HTTP listeners, and an SSL listener, as shown below:

The API Server will automatically create the mapping from the inbound path to the policy for our Parlay-X service. 

Finally we hit "Deploy" to deploy our new SOAP service to the API Server. 


The next step is to map from the SOAP message to the REST API call. Let's see how this is done.

Here is the WSDL for the virtualized Parlay-X service at the API Gateway. I load this up into the free Vordel SOAPbox tool (or SOAPUI) in order to generate a sample SOAP request to this Parlay-X service. 


I then save this sample request as a file called "SampleSOAPMessage.xml". We will use this in order to tell the API Server how to look up the "EndUserIdentifier" value from the SOAP now.

When I registered the Parlay-X WSDL, a sample "handler" was created for me. I am going to delete this, and configure my own handler, which reads the value from the SOAP and dynamically constructs the REST API requests based on the "EndUserIdentifier" value. So first let's delete the default handler:


Next, I drag in a "Set Service Context" into my empty canvas, and I choose the WSDL for the Parlay-X service I just imported. What I am doing here is telling the API Server (and Vordel Analytics) the name of the SOAP service, so that this shows up in monitoring and Analytics. 


Remember to select "Set as start" for this filter. Otherwise it will continue to be grayed out and will not run. Here I am setting it as start:


In the next step, I am setting Schema Validation for my incoming message. Note that, if we don't want to schema-validate the message, you can skip this step. I put a green arrow from the "Set Service Context" filter into the "Schema Validation" filter. 


Next, I am using a "Retrieve from message" filter to select the value of the EndUserIdentifier field from the XML. As you can see below, I am using the XPath Wizard in Policy Studio with the sample message which I made from SOAPbox (or SOAPui if you prefer). I select the place where the EndUserIdentifer is to be found in the message, and I set that it will be placed into an attribute (variable) called "EndUserIdentifier". 



Next, I am using a "Switch" filter to switch based on the content of that "EndUserIdentifier" variable. You can see that I'm saying "If it starts with '617', use routing policy 'Route to Px Service 1", "If it starts with '212', use routing policy 'Route to Px Service 2", etc. This Switch filter is very powerful.


At this point your policy should look like this next screenshot:


So let's look at one of the routing policies which we are calling from our Switch filter. This is a routing policy which is creating a REST API request. It consists of four simple steps. 

Step one is to rewrite the URL, taking into account the EndUserIdentifier value which we read in from the SOAP message. You can see it below with the syntax ${EndUserIdentifier}


Step two is to set the verb to "GET". Because the incoming SOAP message was sent using a POST verb, but we want to use GET to connect to our REST API, I am using a "Set HTTP Verb" filter to convert the verb to "GET".


Step three is to use a "Static Router" filter to set the hostname and port of my REST API server which I want to route to:



Step four is to place a "Connection" filter after the "Static Router". I accept all the default for the "Connection" filter. Note that if I was connecting over SSL to the API, I'd have to make sure I checked the boxes for the certificates used at the endpoint, so that they are trusted.


And that's it! What we achieved here is:

1) Converting from a legacy SOAP request to a REST API call
2) Parameterization of a URL, based on a value read from a SOAP message
3) Conditional routing based on the value from a message (content-based routing).

If you'd like to see more "recipes" like this, check out the tutorials on the Vordel website.

Read the original blog entry...

More Stories By Mark O'Neill

Mark O'Neill is VP Innovation at Axway - API and Identity. Previously he was CTO and co-founder at Vordel, which was acquired by Axway. A regular speaker at industry conferences and a contributor to SOA World Magazine and Cloud Computing Journal, Mark holds a degree in mathematics and psychology from Trinity College Dublin and graduate qualifications in neural network programming from Oxford University.

@ThingsExpo Stories
In his keynote at 18th Cloud Expo, Andrew Keys, Co-Founder of ConsenSys Enterprise, will provide an overview of the evolution of the Internet and the Database and the future of their combination – the Blockchain. Andrew Keys is Co-Founder of ConsenSys Enterprise. He comes to ConsenSys Enterprise with capital markets, technology and entrepreneurial experience. Previously, he worked for UBS investment bank in equities analysis. Later, he was responsible for the creation and distribution of life ...
In his session at 18th Cloud Expo, Bruce Swann, Senior Product Marketing Manager at Adobe, will discuss how the Adobe Marketing Cloud can help marketers embrace opportunities for personalized, relevant and real-time customer engagement across offline (direct mail, point of sale, call center) and digital (email, website, SMS, mobile apps, social networks, connected objects). Bruce Swann has more than 15 years of experience working with digital marketing disciplines like web analytics, social med...
What a difference a year makes. Organizations aren’t just talking about IoT possibilities, it is now baked into their core business strategy. With IoT, billions of devices generating data from different companies on different networks around the globe need to interact. From efficiency to better customer insights to completely new business models, IoT will turn traditional business models upside down. In the new customer-centric age, the key to success is delivering critical services and apps wit...
The essence of data analysis involves setting up data pipelines that consist of several operations that are chained together – starting from data collection, data quality checks, data integration, data analysis and data visualization (including the setting up of interaction paths in that visualization). In our opinion, the challenges stem from the technology diversity at each stage of the data pipeline as well as the lack of process around the analysis.
SYS-CON Events announced today that ContentMX, the marketing technology and services company with a singular mission to increase engagement and drive more conversations for enterprise, channel and SMB technology marketers, has been named “Sponsor & Exhibitor Lounge Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2016, at the Javits Center in New York City, New York. “CloudExpo is a great opportunity to start a conversation with new prospects, but what happens after the...
SYS-CON Events announced today that 24Notion has been named “Bronze Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2016, at the Javits Center in New York, New York. 24Notion is full-service global creative digital marketing, technology and lifestyle agency that combines strategic ideas with customized tactical execution. With a broad understand of the art of traditional marketing, new media, communications and social influence, 24Notion uniquely understands how to con...
The demand for organizations to expand their infrastructure to multiple IT environments like the cloud, on-premise, mobile, bring your own device (BYOD) and the Internet of Things (IoT) continues to grow. As this hybrid infrastructure increases, the challenge to monitor the security of these systems increases in volume and complexity. In his session at 18th Cloud Expo, Stephen Coty, Chief Security Evangelist at Alert Logic, will show how properly configured and managed security architecture can...
When it comes to IoT in the enterprise, namely the commercial building and hospitality markets, a benefit not getting the attention it deserves is energy efficiency, and IoT's direct impact on a cleaner, greener environment when installed in smart buildings. Until now clean technology was offered piecemeal and led with point solutions that require significant systems integration to orchestrate and deploy. There didn't exist a 'top down' approach that can manage and monitor the way a Smart Buildi...
SYS-CON Events announced today BZ Media LLC has been named “Media Sponsor” of SYS-CON's 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. BZ Media LLC is a high-tech media company that produces technical conferences and expositions, and publishes a magazine, newsletters and websites in the software development, SharePoint, mobile development and Commercial Drone markets.
WebRTC is bringing significant change to the communications landscape that will bridge the worlds of web and telephony, making the Internet the new standard for communications. Cloud9 took the road less traveled and used WebRTC to create a downloadable enterprise-grade communications platform that is changing the communication dynamic in the financial sector. In his session at @ThingsExpo, Leo Papadopoulos, CTO of Cloud9, will discuss the importance of WebRTC and how it enables companies to fo...
SYS-CON Events announced today TechTarget has been named “Media Sponsor” of SYS-CON's 18th International Cloud Expo, which will take place on June 7–9, 2016, at the Javits Center in New York City, NY, and the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. TechTarget is the Web’s leading destination for serious technology buyers researching and making enterprise technology decisions. Its extensive global networ...
With major technology companies and startups seriously embracing IoT strategies, now is the perfect time to attend @ThingsExpo 2016 in New York and Silicon Valley. Learn what is going on, contribute to the discussions, and ensure that your enterprise is as "IoT-Ready" as it can be! Internet of @ThingsExpo, taking place Nov 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 17th Cloud Expo and will feature technical sessions from a rock star conference faculty ...
The 19th International Cloud Expo has announced that its Call for Papers is open. Cloud Expo, to be held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, brings together Cloud Computing, Big Data, Internet of Things, DevOps, Containers, Microservices and WebRTC to one location. With cloud computing driving a higher percentage of enterprise IT budgets every year, it becomes increasingly important to plant your flag in this fast-expanding business opportunity. Submit y...
Internet of @ThingsExpo, taking place November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with the 19th International Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world and ThingsExpo New York Call for Papers is now open.
There are several IoTs: the Industrial Internet, Consumer Wearables, Wearables and Healthcare, Supply Chains, and the movement toward Smart Grids, Cities, Regions, and Nations. There are competing communications standards every step of the way, a bewildering array of sensors and devices, and an entire world of competing data analytics platforms. To some this appears to be chaos. In this power panel at @ThingsExpo, moderated by Conference Chair Roger Strukhoff, panelists will discuss the vast to...
SYS-CON Events announced today that Enzu, a leading provider of cloud hosting solutions, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. Enzu’s mission is to be the leading provider of enterprise cloud solutions worldwide. Enzu enables online businesses to use its IT infrastructure to their competitive advantage. By offering a suite of proven hosting and management services, Enzu wants companies to foc...
Customer experience has become a competitive differentiator for companies, and it’s imperative that brands seamlessly connect the customer journey across all platforms. With the continued explosion of IoT, join us for a look at how to build a winning digital foundation in the connected era – today and in the future. In his session at @ThingsExpo, Chris Nguyen, Group Product Marketing Manager at Adobe, will discuss how to successfully leverage mobile, rapidly deploy content, capture real-time d...
IoT generates lots of temporal data. But how do you unlock its value? How do you coordinate the diverse moving parts that must come together when developing your IoT product? What are the key challenges addressed by Data as a Service? How does cloud computing underlie and connect the notions of Digital and DevOps What is the impact of the API economy? What is the business imperative for Cognitive Computing? Get all these questions and hundreds more like them answered at the 18th Cloud Expo...
A strange thing is happening along the way to the Internet of Things, namely far too many devices to work with and manage. It has become clear that we'll need much higher efficiency user experiences that can allow us to more easily and scalably work with the thousands of devices that will soon be in each of our lives. Enter the conversational interface revolution, combining bots we can literally talk with, gesture to, and even direct with our thoughts, with embedded artificial intelligence, wh...
Whether your IoT service is connecting cars, homes, appliances, wearable, cameras or other devices, one question hangs in the balance – how do you actually make money from this service? The ability to turn your IoT service into profit requires the ability to create a monetization strategy that is flexible, scalable and working for you in real-time. It must be a transparent, smoothly implemented strategy that all stakeholders – from customers to the board – will be able to understand and comprehe...