Welcome!

Microservices Expo Authors: Liz McMillan, Elizabeth White, Carmen Gonzalez, Jyoti Bansal, Pat Romanski

Related Topics: Microservices Expo

Microservices Expo: Article

XML Binding Frameworks in the Context of Service-Oriented Architecture

Make an informed choice about a binding framework for your SOA needs

Semantic Interoperability among stakeholders in SOA
Semantic Interoperability reflects the need for different stakeholders in SOA (service requestors and service consumers) to share a common understanding of the documents/data items interchanged. In the recent past, a lot of business communities have come together to define vertical-specific semantic vocabularies in XML abstracting for all of the typical objects and documents of that vertical, e.g., XBRL is an XML standard for financial reporting. To enable service requestors and service providers to process these XML standards-based documents, XML binding frameworks are key to providing a standardized set of IT functionalities in any vertical, especially in those domains where such standards are mainstream.

XML-based data sharing and persistence
In certain situations, data in the form of XML needs to be shared among multiple participants in an SOA. For example, the data from an XML database may need to be accessed by multiple services. XML binding frameworks will enable an easier way for the services, especially those hosted on a similar platform, to access the data. In any situation in which an XML-based Common Information Model of an enterprise needs to be enforced, XML binding frameworks can significantly ease the deployment by providing an easier way to use the API.

Shared Data Services
Shared Data Services (SDS) enable SOA at the data layer by providing a layer of abstraction on top of various data repositories that allow client applications to access these data repositories. Since it is a shared service, it allows reusability and interoperability.

One of the key data formats for working with SDS is XML Schema. The underlying database serving an SDS platform is either a native XML database or a relational database. An XML binding can be used to push data into/from a native XML database or to pull/push data from a relational database accompanied with mapping to/from an XML schema

A Characterization of XML Binding Frameworks
Having established the vitality of XML binding frameworks in an SOA context, we'll first dissect the typical XML binding frameworks.

Many XML binding frameworks are focused on code generation from XML Schema. Using this approach, the starting point is a schema grammar for the documents to be processed, and then you use the binding framework to generate the target source code. The object model or document constructed from a schema can provide a fast way to start working with documents. This can be classified as a document-centric approach.

An alternative approach would be to use the mapped binding in a target language. It works with classes you define in your application in the target language rather than using a set of generated classes based on a schema. This is more of an object-centric approach. This is convenient for the developers because of the closeness of the programming component to the target language.

Most of the conventional applications however stress working with the data, with XML only as a potential form for enabling data to be available to services or applications. These applications are bothered about the consistency of the data rather than the structure of the schema. Such usages of XML binding frameworks can be termed as data-centric.

Figure 2 illustrates a schematic mapping of potential usages of these categories in the context of different SOA applications. Figure 3 shows a summary of the characteristics of the approaches.

Data warehouses and database applications in SOA, e.g., Shared Data Services, can be highlighted as constituting the data management layer, and hence tend to concentrate on a data-centric use of XML binding frameworks. Similarly B2C, intranet, and Internet applications that stress business logic that deals with business entities, constitute the business layer. Typically the business layer applications can be thought of as using an object-centric approach to access the entities, though in some cases a document-centric approach can be used.

Integration and B2B trading applications in the context of SOA that need to exchange contracts/schemas will likely use the document-centric approach.

Some Key XML Binding Frameworks
We will be evaluating some key J2EE XML binding frameworks. A rough categorization of these frameworks is also shown in Figure 3. The frameworks are as follows.

Castor (www.castor.org): Castor XML can marshal almost any "bean-like" Java object to and from XML. The marshalling framework uses a set of descriptors to describe how an object should be marshaled and demarshalled from XML. Castor performs marshalling and demarshalling using Source Generator, which creates a Java object model and provides the binding to marshal, demarshall, and validate instances of XML schema. The source code generator takes as input XML schema document and produces the Java object model pertaining to the specifications of that schema.

JiBX (www.jibx.org): JiBX provides binding from XML data to Java objects. The binding is specified using a definition document, and JiBX uses a binding compiler to compile the definitions into Java byte code for efficiency. JiBX is designed for high performance.

Once the definition is ready, the binding compiler enhances binary class files produced by the Java compiler, adding code to handle converting instances of the classes to or from XML. The enhanced class files generated use a runtime component both for demarshalling and marshalling. The runtime uses a parser that implements the XML Pull API.

JiBX uses the XML Pull parsing technique. Instead of the parser calling methods in the handler to report document parts, one calls the parser to get each component in turn, easing the maintenance of the document state.

More Stories By Dr. Srinivas Padmanabhuni

Dr. Srinivas Padmanabhuni is a principal researcher with the Web Services Centre of Excellence in SETLabs, Infosys Technologies, and specializes in Web Services, service-oriented architecture, and grid technologies alongside pursuing interests in Semantic Web, intelligent agents, and enterprise architecture. He has authored several papers in international conferences. Dr. Padmanabhuni holds a PhD degree in computing science from University of Alberta, Edmonton, Canada.

More Stories By Bijoy Majumdar

Bijoy Majumdar is a member of the Web Services COE (Center of Excellence) for Infosys Technologies, a global IT consulting firm, and has substantial experience in publishing papers, presenting papers at conferences, and defining standards for SOA and Web services. Prior to Infosys, Bijoy Majumdar worked as an IT Analyst, and had been a member of the GE Center of Excellence (e-center) under the E-Business Practice of Tata Consultancy Services.

More Stories By Ujval Mysore

Ujval Mysore is a member of the Web Services COE (Center of Excellence) for Infosys Tehcnologies, a global IT consulting firm, and have substantial experience in publishing papers, presenting papers at conferences, and defining standards for SOA and Web services. The Web Services COE specializes in SOA, Web services, and other related technologies. Dr. Srinivas Padmanabhuni heads the Web Services COE.

More Stories By Vikram Sitaram

Vikram Sitaram is a member of the Web Services COE (Center of Excellence) for Infosys Tehcnologies, a global IT consulting firm, and have substantial experience in publishing papers, presenting papers at conferences, and defining standards for SOA and Web services. The Web Services COE specializes in SOA, Web services, and other related technologies. Dr. Srinivas Padmanabhuni heads the Web Services COE.

Comments (2) View Comments

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


Most Recent Comments
tejasvi 08/12/05 12:13:44 PM EDT

this article is excellent

XML News Desk 08/02/05 04:46:17 PM EDT

XML Binding Frameworks in the Context of Service-Oriented Architecture. This article critically evaluates the role of XML binding frameworks play in the context of service-oriented architecture (SOA) platforms, and it also provides an objective evaluation of the popular XML binding frameworks in a J2EE environment.

@MicroservicesExpo Stories
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 ...
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...
Cloud Expo, Inc. has announced today that Andi Mann and Aruna Ravichandran have been named Co-Chairs of @DevOpsSummit at Cloud Expo 2017. The @DevOpsSummit at Cloud Expo New York will take place on June 6-8, 2017, at the Javits Center in New York City, New York, and @DevOpsSummit at Cloud Expo Silicon Valley will take place Oct. 31-Nov. 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
DevOps and microservices are permeating software engineering teams broadly, whether these teams are in pure software shops but happen to run a business, such Uber and Airbnb, or in companies that rely heavily on software to run more traditional business, such as financial firms or high-end manufacturers. Microservices and DevOps have created software development and therefore business speed and agility benefits, but they have also created problems; specifically, they have created software securi...
With 10 simultaneous tracks, keynotes, general sessions and targeted breakout classes, Cloud Expo and @ThingsExpo are two of the most important technology events of the year. Since its launch over eight years ago, Cloud Expo and @ThingsExpo have presented a rock star faculty as well as showcased hundreds of sponsors and exhibitors! In this blog post, I provide 7 tips on how, as part of our world-class faculty, you can deliver one of the most popular sessions at our events. But before reading the...
@DevOpsSummit at Cloud taking place June 6-8, 2017, at Javits Center, New York City, is co-located with the 20th International Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world. The widespread success of cloud computing is driving the DevOps revolution in enterprise IT. Now as never before, development teams must communicate and collaborate in a dynamic, 24/7/365 environment. There is no time to wait for long developm...
In their general session at 16th Cloud Expo, Michael Piccininni, Global Account Manager - Cloud SP at EMC Corporation, and Mike Dietze, Regional Director at Windstream Hosted Solutions, reviewed next generation cloud services, including the Windstream-EMC Tier Storage solutions, and discussed how to increase efficiencies, improve service delivery and enhance corporate cloud solution development. Michael Piccininni is Global Account Manager – Cloud SP at EMC Corporation. He has been engaged in t...
TechTarget storage websites are the best online information resource for news, tips and expert advice for the storage, backup and disaster recovery markets. By creating abundant, high-quality editorial content across more than 140 highly targeted technology-specific websites, TechTarget attracts and nurtures communities of technology buyers researching their companies' information technology needs. By understanding these buyers' content consumption behaviors, TechTarget creates the purchase inte...
Software development is a moving target. You have to keep your eye on trends in the tech space that haven’t even happened yet just to stay current. Consider what’s happened with augmented reality (AR) in this year alone. If you said you were working on an AR app in 2015, you might have gotten a lot of blank stares or jokes about Google Glass. Then Pokémon GO happened. Like AR, the trends listed below have been building steam for some time, but they’ll be taking off in surprising new directions b...
The Internet of Things is clearly many things: data collection and analytics, wearables, Smart Grids and Smart Cities, the Industrial Internet, and more. Cool platforms like Arduino, Raspberry Pi, Intel's Galileo and Edison, and a diverse world of sensors are making the IoT a great toy box for developers in all these areas. In this Power Panel at @ThingsExpo, moderated by Conference Chair Roger Strukhoff, panelists discussed what things are the most important, which will have the most profound e...
"We're bringing out a new application monitoring system to the DevOps space. It manages large enterprise applications that are distributed throughout a node in many enterprises and we manage them as one collective," explained Kevin Barnes, President of eCube Systems, in this SYS-CON.tv interview at DevOps at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
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...
Docker containers have brought great opportunities to shorten the deployment process through continuous integration and the delivery of applications and microservices. This applies equally to enterprise data centers as well as the cloud. In his session at 20th Cloud Expo, Jari Kolehmainen, founder and CTO of Kontena, will discuss solutions and benefits of a deeply integrated deployment pipeline using technologies such as container management platforms, Docker containers, and the drone.io Cl tool...
In 2014, Amazon announced a new form of compute called Lambda. We didn't know it at the time, but this represented a fundamental shift in what we expect from cloud computing. Now, all of the major cloud computing vendors want to take part in this disruptive technology. In his session at 20th Cloud Expo, John Jelinek IV, a web developer at Linux Academy, will discuss why major players like AWS, Microsoft Azure, IBM Bluemix, and Google Cloud Platform are all trying to sidestep VMs and containers...
DevOps has often been described in terms of CAMS: Culture, Automation, Measuring, Sharing. While we’ve seen a lot of focus on the “A” and even on the “M”, there are very few examples of why the “C" is equally important in the DevOps equation. In her session at @DevOps Summit, Lori MacVittie, of F5 Networks, explored HTTP/1 and HTTP/2 along with Microservices to illustrate why a collaborative culture between Dev, Ops, and the Network is critical to ensuring success.
DevOps is being widely accepted (if not fully adopted) as essential in enterprise IT. But as Enterprise DevOps gains maturity, expands scope, and increases velocity, the need for data-driven decisions across teams becomes more acute. DevOps teams in any modern business must wrangle the ‘digital exhaust’ from the delivery toolchain, "pervasive" and "cognitive" computing, APIs and services, mobile devices and applications, the Internet of Things, and now even blockchain. In this power panel at @...
In his General Session at 16th Cloud Expo, David Shacochis, host of The Hybrid IT Files podcast and Vice President at CenturyLink, investigated three key trends of the “gigabit economy" though the story of a Fortune 500 communications company in transformation. Narrating how multi-modal hybrid IT, service automation, and agile delivery all intersect, he will cover the role of storytelling and empathy in achieving strategic alignment between the enterprise and its information technology.
Both SaaS vendors and SaaS buyers are going “all-in” to hyperscale IaaS platforms such as AWS, which is disrupting the SaaS value proposition. Why should the enterprise SaaS consumer pay for the SaaS service if their data is resident in adjacent AWS S3 buckets? If both SaaS sellers and buyers are using the same cloud tools, automation and pay-per-transaction model offered by IaaS platforms, then why not host the “shrink-wrapped” software in the customers’ cloud? Further, serverless computing, cl...
After more than five years of DevOps, definitions are evolving, boundaries are expanding, ‘unicorns’ are no longer rare, enterprises are on board, and pundits are moving on. Can we now look at an evolution of DevOps? Should we? Is the foundation of DevOps ‘done’, or is there still too much left to do? What is mature, and what is still missing? What does the next 5 years of DevOps look like? In this Power Panel at DevOps Summit, moderated by DevOps Summit Conference Chair Andi Mann, panelists l...
When building DevOps or continuous delivery practices you can learn a great deal from others. What choices did they make, what practices did they put in place, and how did they connect the dots? At Sonatype, we pulled together a set of 21 reference architectures for folks building continuous delivery and DevOps practices using Docker. Why? After 3,000 DevOps professionals attended our webinar on "Continuous Integration using Docker" discussing just one reference architecture example, we recogn...