Comments
yourfanat wrote: I am using another tool for Oracle developers - dbForge Studio for Oracle. This IDE has lots of usefull features, among them: oracle designer, code competion and formatter, query builder, debugger, profiler, erxport/import, reports and many others. The latest version supports Oracle 12C. More information here.
Cloud Computing
Conference & Expo
November 2-4, 2009 NYC
Register Today and SAVE !..

2008 West
DIAMOND SPONSOR:
Data Direct
SOA, WOA and Cloud Computing: The New Frontier for Data Services
PLATINUM SPONSORS:
Red Hat
The Opening of Virtualization
GOLD SPONSORS:
Appsense
User Environment Management – The Third Layer of the Desktop
Cordys
Cloud Computing for Business Agility
EMC
CMIS: A Multi-Vendor Proposal for a Service-Based Content Management Interoperability Standard
Freedom OSS
Practical SOA” Max Yankelevich
Intel
Architecting an Enterprise Service Router (ESR) – A Cost-Effective Way to Scale SOA Across the Enterprise
Sensedia
Return on Assests: Bringing Visibility to your SOA Strategy
Symantec
Managing Hybrid Endpoint Environments
VMWare
Game-Changing Technology for Enterprise Clouds and Applications
Click For 2008 West
Event Webcasts

2008 West
PLATINUM SPONSORS:
Appcelerator
Get ‘Rich’ Quick: Rapid Prototyping for RIA with ZERO Server Code
Keynote Systems
Designing for and Managing Performance in the New Frontier of Rich Internet Applications
GOLD SPONSORS:
ICEsoft
How Can AJAX Improve Homeland Security?
Isomorphic
Beyond Widgets: What a RIA Platform Should Offer
Oracle
REAs: Rich Enterprise Applications
Click For 2008 Event Webcasts
In many cases, the end of the year gives you time to step back and take stock of the last 12 months. This is when many of us take a hard look at what worked and what did not, complete performance reviews, and formulate plans for the coming year. For me, it is all of those things plus a time when I u...
SYS-CON.TV
Book Excerpt: Enabling Agile Business with SOA
Chapter 3: SOA Value Proposition

Each system in Figure 1 is directly connected to the systems with which it must interact during the course of operation. In some cases, external partners are even coming in through the firewall to directly access enterprise systems. In this particular example, the enterprise resource planning (ERP) system is a key component of the enterprise (typical for manufacturing, engineering, and product-centric businesses). It is a mission-critical system that the entire supply chain hinges upon. When significant changes need to be made to such a system (either upgrading to a new system or even just moving to the next major release), the impact of such a change can ripple throughout the enterprise. Figure 2 illustrates this ripple effect, impacting other systems and even the external systems of external business partners.


Figure 2: Changes to the tightly integrated environment produce a catastrophic ripple effect

So how does SOA help with this? If you remember the SOA stack introduced in Chapter 1, these layers of abstraction insulate the enterprise so that changes do not ripple past interface boundaries. By containing the impact of these changes, service orientation keeps development and maintenance costs low and also reduces risk (another value proposition that we will discuss in the “Reducing Risk” section).

 

Increasing Asset Reuse

Question: What do the following things have in common?

  • Disposable diapers
  • Paper plates
  • Air filters
  • Application software

Answer: None of them have ever been designed to be reused.

While some might take exception to this, the reality is that reuse has become something of a holy grail in the information technology (IT) realm. Project managers, business divisions, and even entire enterprises have been chasing it for decades and many have concluded that it is merely a well-fabricated myth. It should come as no surprise, then, that proponents of service orientation are heralding the value of reuse as a major reason to adopt SOA. Those who are relatively new to the industry are quite excited about the prospects of service-oriented reuse. Those of us who have been around for a while, however, recognize that each new technology wave takes up the reuse mantra and espouses the virtues of its particular approach. Service orientation falls prey to this as well. In an attempt to determine the validity of SOA’s reuse claim, we will start by examining software reuse in general; then we will highlight the shortcomings of previous strategies, and finally examine the potential for SOA to actually deliver on the promise of reuse.

Copy-and-Paste as Reuse
Reuse has been tried before. We have tried reusing subroutines, functions, objects, and, eventually, components. Each time we have suffered from one fundamental weakness. No matter how clever the reuse strategy was from a software development standpoint, once we moved into production we had to deploy the software as a local module or library for each system that needs that capability. For example, one team develops a software library for data access. Another team needs the same capability, so they get a copy of that library and deploy it on their server. Then the first team upgrades to the next version. Then a third project borrows the library and modifies it for their needs for a different application. Before long, there are three or four variations running around, no central version of the truth, and no way to provide direct access to a common library at runtime (see Figure 3). Every time someone wants to “reuse” this data library, another copy is placed out onto a server and the potential for another development branch is created. So, in theory we have reuse. In practice, it is just glorified copy-and-paste.

Figure 3: Traditional reuse is more like glorified copy-and-paste

Service Oriented Reuse
Reusing services is a bit different. A service is created and hosted in one place. If another application or system needs to utilize that service, it simply needs to send an appropriately formatted message to the service address (see Figure 4). Additional copies of the service do not get distributed all over the enterprise. Certainly there still will be a need for additional versions of the service to be created, but they are centrally managed and additional uses of the service can be easily supported without losing control.


Figure 4: Service oriented reuse enables capabilities to be reused in different contexts

Increasing Agility
There was a time in the not-too-distant past when the pace of business was a bit slower than it is today. You could leave a message for someone and not expect a response for days, and deploy new products and solutions in months or years rather than days or weeks. If a company had a bad quarter, the market was forgiving and the prevailing mentality was to wait and see how the company performs the remainder of the year. Fast-forward to modern days and you are thrust into a 24/7 business cycle. Messages must be returned the same day, new products and services developed in a matter of weeks, and if a company’s stock is tanking in the morning, investors are questioning the chief executive officer’s (CEO’s) grip on business by lunchtime.

Customers and the market at large seem to value speed and responsiveness over safe, methodical business practices. Responding to opportunities in a matter of weeks or months is no longer acceptable. Previously, this was the advantage of working with smaller firms, but now even large organizations are expected to be nimble and able to adapt quickly to new opportunities. This is what is meant by the term agility. Agility is a measure of how quickly an organization can modify existing capabilities, create new products and services, or modify business processes. Service orientation raises the visibility of underlying business rules and enables rapid turnaround of new and modified business capabilities.

By breaking monolithic information systems into a collection of services, business capabilities can be more quickly and easily modified. For example, a company might have developed some customer account profile services and order-tracking services for use internally by employees. Later, there is a desire to create a customer account management portal to serve customers better and reduce the number of calls made to the customer support center. As illustrated in Figure 5, the existing services could be used to provide access to customer profile and order history and a few additional services created to add visibility into the technical support database.

All of these services could be consumed by a Web portal that is then made available to customers. In the absence of an SOA, all of these capabilities would need to be built from scratch or, at a minimum, copied from other applications and then integrated into the new application. Either way, a service-oriented solution is faster and cheaper to develop. That is how SOA enables agile business.

Figure 5: Service Orientation enables business agility

 

About Kyle Gabhart
Kyle Gabhart is a subject matter expert specializing in strategic planning and tactical delivery of enterprise technology solutions, blending EA, BPM, SOA, Cloud Computing, and other emerging technologies. Kyle currently serves as a director for Web Age Solutions, a premier provider of technology education and mentoring. Since 2001 he has contributed extensively to the IT community as an author, speaker, consultant, and open source contributor.

In order to post a comment you need to be registered and logged in.

Register | Sign-in

Reader Feedback: Page 1 of 1

SOA World Latest Stories
"We do one of the best file systems in the world. We learned how to deal with Big Data many years ago and we implemented this knowledge into our software," explained Jakub Ratajczak, Business Development Manager at MooseFS, in this SYS-CON.tv interview at 20th Cloud Expo, held June 6-8...
Adding public cloud resources to an existing application can be a daunting process. The tools that you currently use to manage the software and hardware outside the cloud aren’t always the best tools to efficiently grow into the cloud. All of the major configuration management tools ha...
CloudEXPO New York 2018, colocated with DXWorldEXPO New York 2018 will be held November 11-13, 2018, in New York City and will bring together Cloud Computing, FinTech and Blockchain, Digital Transformation, Big Data, Internet of Things, DevOps, AI, Machine Learning and WebRTC to one l...
Using new techniques of information modeling, indexing, and processing, new cloud-based systems can support cloud-based workloads previously not possible for high-throughput insurance, banking, and case-based applications. In his session at 18th Cloud Expo, John Newton, CTO, Founder an...
Consumer-driven contracts are an essential part of a mature microservice testing portfolio enabling independent service deployments. In this presentation we'll provide an overview of the tools, patterns and pain points we've seen when implementing contract testing in large development ...
Containers and Kubernetes allow for code portability across on-premise VMs, bare metal, or multiple cloud provider environments. Yet, despite this portability promise, developers may include configuration and application definitions that constrain or even eliminate application portabil...
Subscribe to the World's Most Powerful Newsletters
Subscribe to Our Rss Feeds & Get Your SYS-CON News Live!
Click to Add our RSS Feeds to the Service of Your Choice:
Google Reader or Homepage Add to My Yahoo! Subscribe with Bloglines Subscribe in NewsGator Online
myFeedster Add to My AOL Subscribe in Rojo Add 'Hugg' to Newsburst from CNET News.com Kinja Digest View Additional SYS-CON Feeds
Publish Your Article! Please send it to editorial(at)sys-con.com!

Advertise on this site! Contact advertising(at)sys-con.com! 201 802-3021


SYS-CON Featured Whitepapers
ADS BY GOOGLE