Welcome!

Industrial IoT Authors: Kevin Jackson, Yeshim Deniz, Elizabeth White, SmartBear Blog, Liz McMillan

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
Artificial intelligence, machine learning, neural networks. We’re in the midst of a wave of excitement around AI such as hasn’t been seen for a few decades. But those previous periods of inflated expectations led to troughs of disappointment. Will this time be different? Most likely. Applications of AI such as predictive analytics are already decreasing costs and improving reliability of industrial machinery. Furthermore, the funding and research going into AI now comes from a wide range of com...
SYS-CON Events announced today that EnterpriseTech has been named “Media Sponsor” of SYS-CON's 21st International Cloud Expo, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. EnterpriseTech is a professional resource for news and intelligence covering the migration of high-end technologies into the enterprise and business-IT industry, with a special focus on high-tech solutions in new product development, workload management, increased effi...
In this presentation, Striim CTO and founder Steve Wilkes will discuss practical strategies for counteracting fraud and cyberattacks by leveraging real-time streaming analytics. In his session at @ThingsExpo, Steve Wilkes, Founder and Chief Technology Officer at Striim, will provide a detailed look into leveraging streaming data management to correlate events in real time, and identify potential breaches across IoT and non-IoT systems throughout the enterprise. Strategies for processing massive ...
SYS-CON Events announced today that Conference Guru has been named “Media Sponsor” of SYS-CON's 21st International Cloud Expo, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. 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 organi...
SYS-CON Events announced today that Cloud Academy named "Bronze Sponsor" of 21st International Cloud Expo which will take place October 31 - November 2, 2017 at the Santa Clara Convention Center in Santa Clara, CA. Cloud Academy is the industry’s most innovative, vendor-neutral cloud technology training platform. Cloud Academy provides continuous learning solutions for individuals and enterprise teams for Amazon Web Services, Microsoft Azure, Google Cloud Platform, and the most popular cloud com...
SYS-CON Events announced today that CA Technologies has been named "Platinum Sponsor" of SYS-CON's 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 planning to development to management to security, CA creates software that fuels transformation for companies in the applic...
SYS-CON Events announced today that TMC has been named “Media Sponsor” of SYS-CON's 21st International Cloud Expo and Big Data at Cloud Expo, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Global buyers rely on TMC’s content-driven marketplaces to make purchase decisions and navigate markets. Learn how we can help you reach your marketing goals.
Internet of @ThingsExpo, taking place October 31 - November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 21st Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world. The Internet of Things (IoT) is the most profound change in personal and enterprise IT since the creation of the Worldwide Web more than 20 years ago. All major researchers estimate there will be tens of billions devic...
"MobiDev is a Ukraine-based software development company. We do mobile development, and we're specialists in that. But we do full stack software development for entrepreneurs, for emerging companies, and for enterprise ventures," explained Alan Winters, U.S. Head of Business Development at MobiDev, in this SYS-CON.tv interview at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.
SYS-CON Events announced today that Telecom Reseller has been named “Media Sponsor” of SYS-CON's 21st International Cloud Expo, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. 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.
We build IoT infrastructure products - when you have to integrate different devices, different systems and cloud you have to build an application to do that but we eliminate the need to build an application. Our products can integrate any device, any system, any cloud regardless of protocol," explained Peter Jung, Chief Product Officer at Pulzze Systems, in this SYS-CON.tv interview at @ThingsExpo, held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA
SYS-CON Events announced today that IBM has been named “Diamond Sponsor” of SYS-CON's 21st Cloud Expo, which will take place on October 31 through November 2nd 2017 at the Santa Clara Convention Center in Santa Clara, California.
Multiple data types are pouring into IoT deployments. Data is coming in small packages as well as enormous files and data streams of many sizes. Widespread use of mobile devices adds to the total. In this power panel at @ThingsExpo, moderated by Conference Chair Roger Strukhoff, panelists looked at the tools and environments that are being put to use in IoT deployments, as well as the team skills a modern enterprise IT shop needs to keep things running, get a handle on all this data, and deliver...
The current age of digital transformation means that IT organizations must adapt their toolset to cover all digital experiences, beyond just the end users’. Today’s businesses can no longer focus solely on the digital interactions they manage with employees or customers; they must now contend with non-traditional factors. Whether it's the power of brand to make or break a company, the need to monitor across all locations 24/7, or the ability to proactively resolve issues, companies must adapt to...
SYS-CON Events announced today that Enzu will exhibit at SYS-CON's 21st Int\ernational Cloud Expo®, which will take place October 31-November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. 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 focus on the core of their ...
In his session at @ThingsExpo, Eric Lachapelle, CEO of the Professional Evaluation and Certification Board (PECB), provided an overview of various initiatives to certify 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 worldwide re...
With major technology companies and startups seriously embracing Cloud strategies, now is the perfect time to attend 21st Cloud Expo October 31 - November 2, 2017, at the Santa Clara Convention Center, CA, and June 12-14, 2018, at the Javits Center in New York City, NY, and learn what is going on, contribute to the discussions, and ensure that your enterprise is on the right path to Digital Transformation.
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, discussed some of the security challenges of the IoT infrastructure and related how these aspects impact Smart Living. The material was delivered interac...
IoT solutions exploit operational data generated by Internet-connected smart “things” for the purpose of gaining operational insight and producing “better outcomes” (for example, create new business models, eliminate unscheduled maintenance, etc.). The explosive proliferation of IoT solutions will result in an exponential growth in the volume of IoT data, precipitating significant Information Governance issues: who owns the IoT data, what are the rights/duties of IoT solutions adopters towards t...
New competitors, disruptive technologies, and growing expectations are pushing every business to both adopt and deliver new digital services. This ‘Digital Transformation’ demands rapid delivery and continuous iteration of new competitive services via multiple channels, which in turn demands new service delivery techniques – including DevOps. In this power panel at @DevOpsSummit 20th Cloud Expo, moderated by DevOps Conference Co-Chair Andi Mann, panelists examined how DevOps helps to meet the de...