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Download Continuous Enterprise Development in Java by Aslak Knutsen, Andrew Lee Rubinger PDF

By Aslak Knutsen, Andrew Lee Rubinger

Study a use-case method for constructing Java company functions in a always test-driven type. With this hands-on consultant, authors and Jboss venture leaders Andrew Lee Rubinger and Aslak Knutsen provide help to construct high-level parts, from continual garage to the consumer interface, utilizing the Arquillian checking out platform and several Jboss tasks and tools.

Through the process the e-book, you’ll construct a production-ready software program convention tracker referred to as GeekSeek, utilizing resource code from GitHub. Rubinger and Knutsen exhibit why trying out is the very origin of development—essential for making sure that code is consumable, whole, and correct.
* Bootstrap an common Java Ee venture from begin to end sooner than diving into the full-example program, GeekSeek
* Use either relational and NoSql garage types to construct and try out GeekSeek’s information patience layers
* take on testable enterprise common sense improvement and asynchronous messaging with an Smtp service
* disclose company companies as a Restful interface, utilizing Java Ee’s Jax-Rs framework
* enforce Oauth authentication with Jboss’s Picket
* hyperlink identification administration service
* Validate the Ui by means of automating interplay within the browser and examining the rendered page
* practice full-scale integration trying out at the ultimate deployable archive

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The main culprit is the Java class path. Why does the class path pose problems for modularity? Largely due to all the issues it hides, such as code versions, dependencies, and consistency. Applications are generally composed of various versions of libraries and components. The class path pays no attention to code versions—it returns the first version it finds. Even if it did pay attention, there is no way to explicitly specify dependencies. The process of setting up your class path is largely trial and error; you just keep adding libraries until the VM stops complaining about missing classes.

When you’re done, a logical relationship exists among the classes you created—but where is this relationship captured? Certainly it’s captured in the low-level details of the code, because there are compilation dependencies that won’t be satisfied if all classes aren’t available at compilation time. Likewise, at execution time, these dependencies will fail if all classes aren’t present on the class path when you try to execute your application. Unfortunately, these relationships among classes can only be known through lowlevel source code inspection or trial and error.

We’ll provide you with a full understanding of what OSGi modularity is, why modularity is important in a general sense, and how it can help you in designing, building, and maintaining Java applications in the future. 24 Download from Wow! com> 25 What is modularity? The goal of this chapter is to get you thinking in terms of modules rather than JAR files. We’ll teach you about OSGi module metadata, and you’ll learn how to describe your application’s modularity characteristics with it. To illustrate these concepts, we’ll continue the simple paint program example that we introduced in chapter 1; you’ll convert it from a monolithic application into a modular one.

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