Click here to close now.




















Welcome!

Microsoft Cloud Authors: Greg O'Connor, Liz McMillan, Aleksei Gavrilenko, Elizabeth White, Pat Romanski

Related Topics: Microsoft Cloud, @CloudExpo

Microsoft Cloud: Blog Feed Post

Code Contracts in .NET Help Distributed Software Development Teams

The notion of design-by-contract programming has been around for quite a while

Microsoft’s Research in Software Engineering (RiSE) team is on to something.  Luckily, for developers around the world, they have released it to the public.  I’m talking about Code Contracts in Microsoft .NET.  Code Contracts are very useful under any circumstance; however, they are particularly useful in helping distributed software development teams increase team efficiency, improve product quality, and mitigate against risks associated with team dispersion.

The notion of design-by-contract programming has been around for quite a while.  In fact, Bertrand Meyer (founder of Eiffel) was writing about the trade marked Design by Contract approach as early as 1992.  Design-by-contract programming, according to Meyer, is a fundamental but often overlooked tenant of object oriented programming.  The addition of design-by-contract programming into the .NET framework provides a mechanism by which all .NET languages can benefit from increased reliability.

Code

Distributed software development teams will find Code Contracts particularly useful.  Distributed teams deal with the same issues as non-distributed teams.  In addition; however, the distributed team must manage through issues related to communication, location, and sometimes culture.  Development assignments, in the distributed team scenario, are often partitioned along horizontal or vertical boundaries.  Parallel implementation typically requires up-front design and agreement upon the application interfaces.  This allows the team members, or sub-teams, to code independently of one another.  This approach requires a fair amount of blind trust that the various parts of the application will function as designed.  Code Contracts eliminate the need for blind trust.

Consumers of internal and external APIs that include Code Contracts will know that all of the contract-defined pre- and post-conditions have been met.  This will not only engender trust in current development efforts, it will support the promotion of code/object/service re-use during future development efforts.

Additionally, code contracts:

  • Make the product stabilization process more efficient by weeding out potential run-time errors at compile time.  In a distributed team, this reduces the probability that one group wastes time unknowingly debugging errors introduced by a remote group.  Additionally, it helps reduce the vicious cycle of compile-deploy-test-debug-compile-deploy-test; which can be very time consuming and, thus, expensive.
  • Enhance the continuous integration process by leveraging contracts to generate more meaningful unit tests.  Improved testing and the guarantee that preconditions and postconditions have been met combine to produce more robust, higher quality software.
  • Empower the software architects with additional tools that allow them to programmatically constrain developers.  This is quite useful when managing offshore teams.  In this scenario, the design-by-contract approach can help reduce documentation-derived management overhead and increase quality and reliability at the same time.

The announcement of .NET Code Contracts was a pleasant surprise, as it represents a maturity milestone for the Microsoft .NET platform.  I look forward to adopting it because it gives my software architects another tool that can be leveraged to enforce the architectural fidelity of our products.

Code Contracts can be downloaded for use with Visual Studio 2008 Team System.  The Code Contracts library will be included as a native namespace in the .NET Frameworks 4.0 release.  Mike Barnett provides a great Code Contract tutorial on channel9.msdn.com.

Photo credit David Reeves, El Fotopakismo.

More Stories By Walter Pinson

Walter Pinson is the Chief Software Architect at SMBLive; whose IAmFound social marketing platform helps SMBs (small and medium-sized businesses) get discovered online and generate inbound sales leads. In his role as CSA, Walter manages a globally distributed product development group and has SaaS products deployed at major telecommunications channel partners in the US, UK, Switzerland, Canada, and Mexico. Additionally, Walter is a co-founder and principal of Pinson3 Systems; a boutique software engineering concern serving the intelligence and defense sectors with solutions ranging from enterprise web-based multi-modal biometric analysis systems to information warfare training systems. Prior to his role at SMBLive and founding Pinson3 Systems, Walter was a Senior Strategy Consultant with Microsoft focused on SaaS, SOA, and .NET adoption in the telecommunications sector. Walter has published articles for Cloud Computing Journal, is a member of ACM and IEEE, and currently has one patent pending. He holds a bachelor's degree in computer science from The Volgenau School of Information Technology and Engineering at George Mason University, where he focused on distributed and parallel computing. Walter is currently working on his MBA at the GMU School of Management.

@ThingsExpo Stories
For IoT to grow as quickly as analyst firms’ project, a lot is going to fall on developers to quickly bring applications to market. But the lack of a standard development platform threatens to slow growth and make application development more time consuming and costly, much like we’ve seen in the mobile space. In his session at @ThingsExpo, Mike Weiner, Product Manager of the Omega DevCloud with KORE Telematics Inc., discussed the evolving requirements for developers as IoT matures and conducted a live demonstration of how quickly application development can happen when the need to comply wit...
Explosive growth in connected devices. Enormous amounts of data for collection and analysis. Critical use of data for split-second decision making and actionable information. All three are factors in making the Internet of Things a reality. Yet, any one factor would have an IT organization pondering its infrastructure strategy. How should your organization enhance its IT framework to enable an Internet of Things implementation? In his session at @ThingsExpo, James Kirkland, Red Hat's Chief Architect for the Internet of Things and Intelligent Systems, described how to revolutionize your archit...
SYS-CON Events announced today that HPM Networks will exhibit at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. For 20 years, HPM Networks has been integrating technology solutions that solve complex business challenges. HPM Networks has designed solutions for both SMB and enterprise customers throughout the San Francisco Bay Area.
MuleSoft has announced the findings of its 2015 Connectivity Benchmark Report on the adoption and business impact of APIs. The findings suggest traditional businesses are quickly evolving into "composable enterprises" built out of hundreds of connected software services, applications and devices. Most are embracing the Internet of Things (IoT) and microservices technologies like Docker. A majority are integrating wearables, like smart watches, and more than half plan to generate revenue with APIs within the next year.
The Internet of Everything (IoE) brings together people, process, data and things to make networked connections more relevant and valuable than ever before – transforming information into knowledge and knowledge into wisdom. IoE creates new capabilities, richer experiences, and unprecedented opportunities to improve business and government operations, decision making and mission support capabilities.
Growth hacking is common for startups to make unheard-of progress in building their business. Career Hacks can help Geek Girls and those who support them (yes, that's you too, Dad!) to excel in this typically male-dominated world. Get ready to learn the facts: Is there a bias against women in the tech / developer communities? Why are women 50% of the workforce, but hold only 24% of the STEM or IT positions? Some beginnings of what to do about it! In her Opening Keynote at 16th Cloud Expo, Sandy Carter, IBM General Manager Cloud Ecosystem and Developers, and a Social Business Evangelist, d...
In his keynote at 16th Cloud Expo, Rodney Rogers, CEO of Virtustream, discussed the evolution of the company from inception to its recent acquisition by EMC – including personal insights, lessons learned (and some WTF moments) along the way. Learn how Virtustream’s unique approach of combining the economics and elasticity of the consumer cloud model with proper performance, application automation and security into a platform became a breakout success with enterprise customers and a natural fit for the EMC Federation.
The Internet of Things is not only adding billions of sensors and billions of terabytes to the Internet. It is also forcing a fundamental change in the way we envision Information Technology. For the first time, more data is being created by devices at the edge of the Internet rather than from centralized systems. What does this mean for today's IT professional? In this Power Panel at @ThingsExpo, moderated by Conference Chair Roger Strukhoff, panelists addressed this very serious issue of profound change in the industry.
Discussions about cloud computing are evolving into discussions about enterprise IT in general. As enterprises increasingly migrate toward their own unique clouds, new issues such as the use of containers and microservices emerge to keep things interesting. In this Power Panel at 16th Cloud Expo, moderated by Conference Chair Roger Strukhoff, panelists addressed the state of cloud computing today, and what enterprise IT professionals need to know about how the latest topics and trends affect their organization.
It is one thing to build single industrial IoT applications, but what will it take to build the Smart Cities and truly society-changing applications of the future? The technology won’t be the problem, it will be the number of parties that need to work together and be aligned in their motivation to succeed. In his session at @ThingsExpo, Jason Mondanaro, Director, Product Management at Metanga, discussed how you can plan to cooperate, partner, and form lasting all-star teams to change the world and it starts with business models and monetization strategies.
Converging digital disruptions is creating a major sea change - Cisco calls this the Internet of Everything (IoE). IoE is the network connection of People, Process, Data and Things, fueled by Cloud, Mobile, Social, Analytics and Security, and it represents a $19Trillion value-at-stake over the next 10 years. In her keynote at @ThingsExpo, Manjula Talreja, VP of Cisco Consulting Services, discussed IoE and the enormous opportunities it provides to public and private firms alike. She will share what businesses must do to thrive in the IoE economy, citing examples from several industry sectors.
There will be 150 billion connected devices by 2020. New digital businesses have already disrupted value chains across every industry. APIs are at the center of the digital business. You need to understand what assets you have that can be exposed digitally, what their digital value chain is, and how to create an effective business model around that value chain to compete in this economy. No enterprise can be complacent and not engage in the digital economy. Learn how to be the disruptor and not the disruptee.
Akana has released Envision, an enhanced API analytics platform that helps enterprises mine critical insights across their digital eco-systems, understand their customers and partners and offer value-added personalized services. “In today’s digital economy, data-driven insights are proving to be a key differentiator for businesses. Understanding the data that is being tunneled through their APIs and how it can be used to optimize their business and operations is of paramount importance,” said Alistair Farquharson, CTO of Akana.
Business as usual for IT is evolving into a "Make or Buy" decision on a service-by-service conversation with input from the LOBs. How does your organization move forward with cloud? In his general session at 16th Cloud Expo, Paul Maravei, Regional Sales Manager, Hybrid Cloud and Managed Services at Cisco, discusses how Cisco and its partners offer a market-leading portfolio and ecosystem of cloud infrastructure and application services that allow you to uniquely and securely combine cloud business applications and services across multiple cloud delivery models.
The enterprise market will drive IoT device adoption over the next five years. In his session at @ThingsExpo, John Greenough, an analyst at BI Intelligence, division of Business Insider, analyzed how companies will adopt IoT products and the associated cost of adopting those products. John Greenough is the lead analyst covering the Internet of Things for BI Intelligence- Business Insider’s paid research service. Numerous IoT companies have cited his analysis of the IoT. Prior to joining BI Intelligence, he worked analyzing bank technology for Corporate Insight and The Clearing House Payment...
"Optimal Design is a technology integration and product development firm that specializes in connecting devices to the cloud," stated Joe Wascow, Co-Founder & CMO of Optimal Design, in this SYS-CON.tv interview at @ThingsExpo, held June 9-11, 2015, at the Javits Center in New York City.
SYS-CON Events announced today that CommVault has been named “Bronze Sponsor” of SYS-CON's 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. A singular vision – a belief in a better way to address current and future data management needs – guides CommVault in the development of Singular Information Management® solutions for high-performance data protection, universal availability and simplified management of data on complex storage networks. CommVault's exclusive single-platform architecture gives companies unp...
Electric Cloud and Arynga have announced a product integration partnership that will bring Continuous Delivery solutions to the automotive Internet-of-Things (IoT) market. The joint solution will help automotive manufacturers, OEMs and system integrators adopt DevOps automation and Continuous Delivery practices that reduce software build and release cycle times within the complex and specific parameters of embedded and IoT software systems.
"ciqada is a combined platform of hardware modules and server products that lets people take their existing devices or new devices and lets them be accessible over the Internet for their users," noted Geoff Engelstein of ciqada, a division of Mars International, in this SYS-CON.tv interview at @ThingsExpo, held June 9-11, 2015, at the Javits Center in New York City.
Internet of Things is moving from being a hype to a reality. Experts estimate that internet connected cars will grow to 152 million, while over 100 million internet connected wireless light bulbs and lamps will be operational by 2020. These and many other intriguing statistics highlight the importance of Internet powered devices and how market penetration is going to multiply many times over in the next few years.