By Craig Walls
The mystery weapon for attacking complexity in any undertaking is to wreck it down into smaller, cohesive, and extra simply digestible items. With Modular Java, you could simply enhance functions which are extra versatile, testable, maintainable, and comprehensible.
Modular Java is a practical consultant to constructing modular functions utilizing OSGi, the framework for dynamic modularity in Java, and Spring Dynamic Modules, an OSGi extension to the Spring Framework. You'll begin with the fundamentals yet speedy ramp up, developing loosely coupled modules that submit and eat prone, and you'll see the best way to compose them into greater purposes. alongside the way in which, you'll follow what you study as you construct an entire net program that's made from a number of OSGi modules, utilizing Spring-DM to twine these modules together.
Modular Java is stuffed with suggestions and tips that would make you a more adept OSGi and Spring-DM developer. built with the knowledge received from this publication, you'll be ready to enhance purposes which are extra strong and agile.
Read Online or Download Modular Java: Creating Flexible Applications with Osgi and Spring (Pragmatic Programmers) PDF
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Extra info for Modular Java: Creating Flexible Applications with Osgi and Spring (Pragmatic Programmers)
1, on the following page). ” as the bundle is stopped. Notice that both methods are given a BundleContext that can be used to interact with the OSGi container. We’ll see how to use the BundleContext a little later, but we won’t need it in this example. 32 H ELLO , OSG I OSGi Framework Hello World! 0 Goodbye World! ” when the bundle is stopped. We’re almost ready to see the bundle in action. But first, we must create the bundle JAR file. 2, on the next page. Since I’m using Maven, you can create the JAR file with the Maven’s package goal: hello% [INFO] [INFO] [INFO] [INFO] [INFO] ...
Adds Import-Package instructions to ensure that a bundle imports a dependency bundle. Moves a bundle project to a new directory, updating the Maven POM as necessary. Starts an OSGi framework (Felix by default), installs all of the project’s bundles and dependencies, and starts the bundles. Removes a bundle from the OSGi project. Checks for and installs a new version of Pax Construct. Creates a bundle project within an OSGi project or a module that wraps a third-party JAR file as an OSGi bundle.
Secure=8443] -> Using default executor -> Downloading bundles... 2]. Runner has successfully finished his job! Welcome to Felix. ================= -> 55 S ETTING U P THE P ROJECT As you can see, pax-provision fires up Felix. ” That’s because we haven’t created any bundles in our project yet. We’ll get to that soon. But first, I thought you might be interested in seeing a few ways that the project can be customized. xml file. If you open that file up in your text editor, you’ll find a handful of places where you can customize the project.