What is spring OSGi?

Spring DM is a framework, made of a set of OSGi bundles that can be deployed in any OSGi container. These bundles don’t bring any business features to an OSGi application; instead, they aim at watching other bundles and creating Spring application contexts for them.

What is the point of OSGi?

OSGi is meant to solve common class loading issues that are seen in traditional Java EE environments; it is a set of specifications that are used in the creation of jars with extra manifest information to define dependencies and class loading behavior.

What is an OSGi framework?

The OSGi (Open Service Gateway Initiative) specification is a Java framework for developing and deploying modular software programs and libraries. The framework was originally managed by the OSGi Alliance, an open standards organization.

Does spring use OSGi?

No, it doesn’t support OSGi. Spring Boot is aimed to create microservices as packaged applications with every dependency and even the servlet containers packaged in an executable JAR, so it’s highly modular and updateable, without the need to provide and configure an OSGi container.

What is OSGi blueprint?

The OSGi Blueprint Container Specification defines a dependency injection framework for OSGi derived from the Spring Dynamic Modules project. The specification defines a component model for OSGi based on the core Spring framework in which an OSGi bundle is augmented by an XML module blueprint .

Who is using OSGi?

Who uses OSGi? 11 companies reportedly use OSGi in their tech stacks, including Liferay, Business Filemanager, and SYSTHEMIS AG.

What is OSGi in simple terms?

Simply said, OSGi is a dynamic module system for Java. It defines means to install, uninstall, update, start and stop modules. Those modules are called bundles, but are, in their simplest form, actually Java jar files with a special Manifest.

What is Karaf container?

Apache Karaf is a modern polymorphic application container. Karaf can be used as a standalone container, supporting a wide range of applications and technologies. It also supports the “run anywhere” concept (on any machine with Java, cloud, docker images, … ​) using the embedded mode.

What is org Eclipse OSGi?

OSGi, The Dynamic Module System for Java Its proven services model enables application and infrastructure modules to communicate locally and distributed across the network, providing a coherent end-to-end architecture. OSGi specifications have been extensively field-tested and are ready to use.

What is Blueprint XML file?

A Blueprint XML file is identified by a top-level blueprint element and contains definitions of component managers such as a bean manager, a service manager, and service reference managers. A Blueprint XML file is identified by a top-level Blueprint element, as shown in the following blueprint. xml example code.

How can I learn OSGi?

OSGi for Beginners

  1. Introduction.
  2. Getting Started with OSGi.
  3. A Simple Repository to put into a Bundle.
  4. Sidetrack: Building an OSGi bundle with a Dependency.
  5. Building our Repository Bundle.
  6. Using our OSGi Bundle from another Bundle.
  7. Running our Bundles in another OSGi Container.
  8. An Actual Application, sort of: an IRC Bot.