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These materials are the copyright of John Wiley & Sons, Inc. and any dissemination, distribution, or unauthorized use is strictly prohibited. 24 Platform as a Service For Dummies, Special Edition Developing Applications in the Cloud Developing in a PaaS environment is different than the way development organizations have produced software over the past few decades. In a traditional model, the development team may select a variety of different tools — operating systems, middleware, testing products, and the like. Many organizations have been very effective with this approach. However, typically, problems of managing complexity exist — especially in an era where more and more aspects of daily life are controlled by software. Managing the complexity of traditional software development environments often translates into spending a lot of time and money on building, managing, maintaining, and upgrading these environments. As a result, companies have fewer resources to apply to designing, developing, and testing software. The net impact on developers is that they may fall short of achieving their primary objectives: ✓ Producing high-quality and secure software ✓ Meeting user expectations ✓ Completing software development projects on time and within budget PaaS, on the other hand, provides hosted services used during development, such as middleware and operating systems. Because these services are always available for a developer to use without installation, maintenance, or IT support, the developer doesn’t have to deal directly with complex services and middleware — unless they want to be exposed to the details. PaaS can bring many advantages in terms of improving the economics of the development process and increasing the speed and agility of the development teams. In addition to providing self-service access to infrastructure resources, many PaaS vendors take responsibility for the IT platform maintenance and security requirements that are typically managed by developers and IT staff. The company benefits from a decrease in capital expenditures by eliminating the need to buy servers, middleware, and other infrastructure to
These materials are the copyright of John Wiley & Sons, Inc. and any dissemination, distribution, or unauthorized use is strictly prohibited. Chapter 3: Looking at PaaS as a Development Platform 25 support all resource requirements. In addition, PaaS costs are typically relative to the number of users, so platform costs are more in line with overall development costs and salaries. By using a PaaS environment for development, individual developers and their IT partners can enjoy these additional benefits: ✓ Continue to use development tools they already understand and value but in a cloud environment ✓ Increase the focus on the business goals because the details of configurations or selecting and integrating development tools are handled behind the scenes ✓ Avoid costly mistakes by making the process easier to incorporate continuous integration while developing faster ✓ Write more secure code because the PaaS automatically manages security updates and has data privacy and protection rules built into the fabric of the environment ✓ Write higher-quality code by leveraging sophisticated software development tools that would otherwise be very costly to implement and maintain ✓ Speed up development time by eliminating the need to request and wait for additional IT infrastructure ✓ Speed up development time by eliminating the need to do maintenance work and upgrade components ✓ Deliver applications on multiple devices and multiple operating systems faster The Role of Continuous Integration Continuous integration is a technique that follows continuous build and test patterns and — makes sure software defects are detected as early as possible. Continuous integration and testing is the best way to make sure that the product always works even while coding is ongoing. While this software development best practice isn’t unique to the cloud, it’s critically important for companies aiming to become successful with PaaS because developers are able to increase the speed at which they deliver
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