By Michael Hüttermann
DevOps for builders promises a pragmatic, thorough advent to methods, procedures and instruments to foster collaboration among software program improvement and operations. Efforts of Agile software program improvement usually finish on the transition section from improvement to operations. This e-book covers the supply of software program, this implies "the final mile", with lean practices for delivery the software program to construction and making it to be had to the top clients, including the mixing of operations with prior undertaking stages (elaboration, development, transition).
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Approximately This Book
Demystify the quandaries of internet improvement utilizing Play Framework
try and debug your apps through the use of Play's inbuilt checking out framework
grasp the center gains of Scala via a accomplished insurance of code and examples for various scenarios
Who This ebook Is For
This ebook is meant for these builders who're prepared to grasp the inner workings of Play Framework to successfully construct and install web-related apps.
What you are going to Learn
customise your framework to deal with the explicit specifications of an program
improve responsive, trustworthy, and hugely scalable purposes utilizing Play Framework
construct and customise Play Framework plugins that may be utilized in a number of Play functions
get yourself up to speed with third-party APIs to prevent rewriting present code
achieve an perception into some of the elements of trying out and debugging in Play to effectively try your apps
Get to grasp all concerning the thoughts of WebSockets and Actors to method messages in keeping with events
Play Framework is an open resource internet software framework that's written in Java and Scala. It follows the Model-View-Controller architectural development and allows the consumer to hire Scala for software improvement, whereas holding key houses and lines of Play Framework intact.
Starting off through development a simple software with minimum good points, you get a close perception into dealing with information transactions and designing versions in Play. subsequent, you enterprise into the options of Actors and WebSockets, the method of manipulating info streams, and checking out and debugging an software in Play. ultimately, you achieve an perception into extending the framework by way of writing customized modules or plugins in Play. every one bankruptcy has a troubleshooting part that is helping you out by way of discussing the factors of, and recommendations to, a few normally confronted matters.
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Extra resources for DevOps for Developers
If an automated system has an error, the full system is often completely unavailable until the error is identiﬁed (ﬁrst challenge) and ﬁxed (second challenge). Finding the error is a nontrivial task that cannot be performed by a novice engineer who is not an expert at the underlying, automated baby steps. Even if you have the conﬁdence to claim that a problem does not exist because the system runs at the moment, there are always scenarios (besides the nice weather scenario) that provoke malfunctions or errors in this running system.
Broken Agile Metrics Despite good intentions, metrics are often broken in Agile teams. The following are some examples of broken metrics: • Test pass/fail ratios: The Agile team stops the line and immediately ﬁxes a broken test. Thus, the test pass/fail ratio is not useful because the team stops and directly ﬁxes the regression. However, the metric is useful for detecting basic ﬂaws. For example, if the test coverage is below 20 percent, it is pretty obvious that technical debt has been accumulated.
Continuous integration servers, such as Jenkins, simply have to listen to the path in the version control system to detect changes. , Puppet) ensures that the corresponding machines apply the behavior that is described in version control. • Using tools such as Jenkins (see Chapter 8) and Puppet and Vagrant (see Chapter 9), complete setups, including virtualizations, can be managed automatically. , Puppet manifests). A cross-functional team that includes development and operations can develop this function.
DevOps for Developers by Michael Hüttermann