Welcome!

Microsoft Cloud Authors: Liz McMillan, David H Deans, Pat Romanski, Janakiram MSV, Jnan Dash

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
SYS-CON Events announced today that Technologic Systems Inc., an embedded systems solutions company, will exhibit at SYS-CON's @ThingsExpo, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Technologic Systems is an embedded systems company with headquarters in Fountain Hills, Arizona. They have been in business for 32 years, helping more than 8,000 OEM customers and building over a hundred COTS products that have never been discontinued. Technologic Systems’ pr...
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 ...
The taxi industry never saw Uber coming. Startups are a threat to incumbents like never before, and a major enabler for startups is that they are instantly “cloud ready.” If innovation moves at the pace of IT, then your company is in trouble. Why? Because your data center will not keep up with frenetic pace AWS, Microsoft and Google are rolling out new capabilities In his session at 20th Cloud Expo, Don Browning, VP of Cloud Architecture at Turner, will posit that disruption is inevitable for c...
SYS-CON Events announced today that Cloudistics, an on-premises cloud computing company, 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. Cloudistics delivers a complete public cloud experience with composable on-premises infrastructures to medium and large enterprises. Its software-defined technology natively converges network, storage, compute, virtualization, and management into a ...
Keeping pace with advancements in software delivery processes and tooling is taxing even for the most proficient organizations. Point tools, platforms, open source and the increasing adoption of private and public cloud services requires strong engineering rigor - all in the face of developer demands to use the tools of choice. As Agile has settled in as a mainstream practice, now DevOps has emerged as the next wave to improve software delivery speed and output. To make DevOps work, organization...
The explosion of new web/cloud/IoT-based applications and the data they generate are transforming our world right before our eyes. In this rush to adopt these new technologies, organizations are often ignoring fundamental questions concerning who owns the data and failing to ask for permission to conduct invasive surveillance of their customers. Organizations that are not transparent about how their systems gather data telemetry without offering shared data ownership risk product rejection, regu...
SYS-CON Events announced today that Loom Systems will exhibit at 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. Founded in 2015, Loom Systems delivers an advanced AI solution to predict and prevent problems in the digital business. Loom stands alone in the industry as an AI analysis platform requiring no prior math knowledge from operators, leveraging the existing staff to succeed in the digital era. With offices in S...
SYS-CON Events announced today that Interoute, owner-operator of one of Europe's largest networks and a global cloud services platform, has been named “Bronze Sponsor” of SYS-CON's 20th Cloud Expo, which will take place on June 6-8, 2017 at the Javits Center in New York, New York. Interoute is the owner-operator of one of Europe's largest networks and a global cloud services platform which encompasses 12 data centers, 14 virtual data centers and 31 colocation centers, with connections to 195 add...
SYS-CON Events announced today that SoftLayer, an IBM Company, has been named “Gold 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. SoftLayer, an IBM Company, provides cloud infrastructure as a service from a growing number of data centers and network points of presence around the world. SoftLayer’s customers range from Web startups to global enterprises.
SYS-CON Events announced today that CrowdReviews.com has been named “Media 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. CrowdReviews.com is a transparent online platform for determining which products and services are the best based on the opinion of the crowd. The crowd consists of Internet users that have experienced products and services first-hand and have an interest in letting other potential buyers...
SYS-CON Events announced today that T-Mobile will exhibit at 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. As America's Un-carrier, T-Mobile US, Inc., is redefining the way consumers and businesses buy wireless services through leading product and service innovation. The Company's advanced nationwide 4G LTE network delivers outstanding wireless experiences to 67.4 million customers who are unwilling to compromise on ...
SYS-CON Events announced today that Infranics will exhibit at 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. Since 2000, Infranics has developed SysMaster Suite, which is required for the stable and efficient management of ICT infrastructure. The ICT management solution developed and provided by Infranics continues to add intelligence to the ICT infrastructure through the IMC (Infra Management Cycle) based on mathemat...
SYS-CON Events announced today that SD Times | BZ Media has been named “Media 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. 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 UAV markets.
SYS-CON Events announced today that Telecom Reseller has been named “Media 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. 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.
"I think that everyone recognizes that for IoT to really realize its full potential and value that it is about creating ecosystems and marketplaces and that no single vendor is able to support what is required," explained Esmeralda Swartz, VP, Marketing Enterprise and Cloud at Ericsson, in this SYS-CON.tv interview at @ThingsExpo, held June 7-9, 2016, at the Javits Center in New York City, NY.
In his keynote at @ThingsExpo, Chris Matthieu, Director of IoT Engineering at Citrix and co-founder and CTO of Octoblu, focused on building an IoT platform and company. He provided a behind-the-scenes look at Octoblu’s platform, business, and pivots along the way (including the Citrix acquisition of Octoblu).
SYS-CON Events announced today that HTBase will exhibit at 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. HTBase (Gartner 2016 Cool Vendor) delivers a Composable IT infrastructure solution architected for agility and increased efficiency. It turns compute, storage, and fabric into fluid pools of resources that are easily composed and re-composed to meet each application’s needs. With HTBase, companies can quickly prov...
Web Real-Time Communication APIs have quickly revolutionized what browsers are capable of. In addition to video and audio streams, we can now bi-directionally send arbitrary data over WebRTC's PeerConnection Data Channels. With the advent of Progressive Web Apps and new hardware APIs such as WebBluetooh and WebUSB, we can finally enable users to stitch together the Internet of Things directly from their browsers while communicating privately and securely in a decentralized way.
DevOps is often described as a combination of technology and culture. Without both, DevOps isn't complete. However, applying the culture to outdated technology is a recipe for disaster; as response times grow and connections between teams are delayed by technology, the culture will die. A Nutanix Enterprise Cloud has many benefits that provide the needed base for a true DevOps paradigm.
What sort of WebRTC based applications can we expect to see over the next year and beyond? One way to predict development trends is to see what sorts of applications startups are building. In his session at @ThingsExpo, Arin Sime, founder of WebRTC.ventures, will discuss the current and likely future trends in WebRTC application development based on real requests for custom applications from real customers, as well as other public sources of information,