By Daniel Rubio
Spring and OSGi’s beneficial properties are a traditional healthy; they're orthogonal to one another: OSGi is set packaging, deployment, and versioning concerns, whereas Spring is ready offering the required starting place to twine up Java sessions of their most elementary shape utilizing dependency injection and element orientation to satisfy an application’s function.
Pro Spring Dynamic Modules for OSGi™ carrier Platforms through Daniel Rubio is the 1st ebook to hide OSGi as virtually carried out via the world’s hottest, agile, and open resource company Java framework, Spring.
* writer Daniel Rubio covers the convenience at which OSGi is used with the Spring Framework in improvement, packaging, versioning, and deployment.
* organizations are trusting Spring increasingly more, and this e-book leverages OSGi in a manner that could “complete” using Spring within the firm, as OSGi is already being depended on and followed by way of IBM, BEA, and others.
* The textual content discusses how Spring OSGi makes your Spring purposes depended on SOA purposes.
<h3>What you’ll learn</h3> * comprehend the basics of OSGi and Spring, and mix the two.
* Take your Spring purposes and bundles, and comprise OSGi for production–ready packaging, versioning practices, and deployment.
* Create production–ready Spring Beans through packaging and versioning, after which set up them.
* improve info entry equipment and skill to your Spring OSGi initiatives.
* construct and use GUIs for Spring OSGi.
* attempt, scale, and optimize your Spring OSGi functions for deployment and performance.
<h3>Who is that this booklet for?</h3>
This e-book is for Java builders utilizing the Spring Framework who're trying to make the most of OSGi beneficial properties, and Java builders quite often seeking to discover OSGi’s function on server–side development.
<h3>About the Apress seasoned Series</h3>
The Apress professional sequence books are useful, expert tutorials to maintain you on and relocating up the pro ladder.
You have got the task, now you want to hone your abilities in those difficult aggressive occasions. The Apress professional sequence expands your talents and services in precisely the parts you wish. grasp the content material of a professional e-book, and you'll regularly be capable of get the activity performed in a certified improvement undertaking. Written by means of specialists of their box, professional sequence books from Apress provide the hard–won suggestions to difficulties you'll face on your specialist programming career.
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Extra info for Pro Spring Dynamic Modules for OSGi™ Service Platforms
You’ve already downloaded an OSGi bundle containing such a service, one based on the Jetty Java web server, so let’s get on with the task of deploying this bundle and its accompanying service. jar and enter the profile name HelloWorld. Once inside Felix’s shell, perform the following steps: 1. jar, which is a required bundle dependency for the Http Service bundle. 2. jar, which is the actual Http Service OSGi bundle. 3. jar. This will activate the Http Service, along with its underlying web server.
The previous steps set up the bundles’ source files for compilation, with the movement of prebuilt bundles (JARs) serving to fulfill dependencies at compile time. The actual compilation process you will now embark on will be carried out using Apache Ant. Apache Ant relies on an XML-based file to define its tasks. Listing 1-6 shows the first iteration of this file used to build your first OSGi bundles. Listing 1-6. xml file defines the numerous flags used in the Java compilation process, indicates where the bundles’ source files are located, defines where the compiled classes are to be placed, copies property files from the source directory to the compiled class directory, and modifies the default CLASSPATH value to include additional JAR files and the compiled class directory.
The reason for this is that Apache Felix keeps track of all changes made to bundles, copying each installed bundle to a separate location and maintaining whatever changes are propagated to the bundle. This tracking and location mechanism is based on the profile name you enter upon starting a session. felix/HelloWorld/—where