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These materials are the copyright of John Wiley & Sons, Inc. and any dissemination, distribution, or unauthorized use is strictly prohibited. 30 Platform as a Service For Dummies, Special Edition Frameworks Developers typically use a development framework to help create quality software that performs well under varying conditions. While frameworks are used in traditional software environments, these frameworks can be more consistently shared across large distributed teams when used in a PaaS environment. Some of the key benefits of using frameworks in a PaaS environment include ✓ Quickly establishing a consistent structure for an application ✓ Accessing secure and tested foundational software modules for coding ✓ Accessing run-time services for testing to make sure that the application runs properly in production Your PaaS provider may have the following two examples of frameworks available: ✓ Spring: One of the most commonly used application development frameworks for enterprise Java ✓ The Play framework: For building web applications with Java and Scala Database services One of the most important tests for a new application is to understand how it works with real end-user data. This type of testing often presents a challenge for developers because the application may be intended to work with data stored in a very large and complex database. Developers often install a lightweight database in their development environment in order to test the code with data but aren’t able to test against a true production database during the development phase. One of the major advantages of developing in a PaaS environment is that the developer can have immediate access to a database with the same characteristics of the eventual production database. For example, if the application needs to call a MySQL database in production, the developer can leverage PaaS database services to test the code with hosted MySQL database already provided by the PaaS.
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 31 Test and automation tools Testing services can be built into the PaaS platform or provided by its ecosystem of services. These services can include User Interface testing or load testing. Access to these tools is beneficial to companies of all sizes; however, the impact on small to midsize companies can be huge. Smaller companies may not have the resources to purchase and maintain the state of the art tools designed to improve the quality of the development process. These smaller teams can use PaaS to have access to the same best practice environment that many of the larger competitors have built in house at a very high price. Test and automation tool examples include the following: ✓ Jenkins: Most widely used continuous integration server; initiates build jobs as developers check-in code, works with Maven, and contains many plug-ins to customize how and why the builds happen, and to connect to various supporting systems ✓ Selenium: Designed for testing how your software performs with multiple browsers, such as Safari, Chrome, and Firefox ✓ Sonar: Provides feedback on the quality of your code Performance analysis tools A limitation exists on how many different kinds of tests can be applied to the code in the developer’s own local environment. Performance analysis, including production profiling and load testing, is hard for the developer to do on his own. The developer may not be able to replicate the wide range of machines and networks that may be found in end-user environments. Examples of cloud-based tools designed for this purpose include ✓ SOASTA: Leverages clusters of cloud machines to simulate user load on your application based on a number of criteria (number and type of clients, geographical location, load pattern, and so on) ✓ New Relic: Designed to provide insight to end-user behavior, monitor server behavior, and identify bottlenecks
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