What is OSGi life cycle?
The OSGi Life-Cycle layer adds bundles that can be dynamically installed, started, stopped, updated, and uninstalled. Life cycle operations are fully protected with the security architecture. You can say that the OSGi Life-cycle includes the following steps: ACTIVE.
What OSGi stands for?
Open Service Gateway Initiative
OSGi (Open Service Gateway Initiative) is a Java framework for developing and deploying modular software programs and libraries.
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. A bundle needs to state which Java packages it exports and which it imports.
What is the architecture of OSGi?
The core OSGi Service Platform has a layered architecture, and is designed to run on a variety of standard Java profiles. OSGi introduces the notion of a bundle as a modular unit, and the platform architecture is based upon bundles as the unit of deployment.
What is OSGi used for?
The OSGi component system is used to build any type of application ranging from the simple to highly complex applications like IDEs, application servers, email systems, content management systems, application frameworks, residential gateways and onboard telematics systems.
What is the importance of the OSGi Service Registry?
The OSGi service registry enables a bundle to publish objects to a shared registry, advertised via a given set of Java interfaces. Published services also have service properties associated with them in the registry.
What is the use of OSGi?
OSGi is a Java framework for developing and deploying modular software programs and libraries. Each bundle is a tightly coupled, dynamically loadable collection of classes, jars, and configuration files that explicitly declare their external dependencies (if any).
What is ServiceMix used for?
Apache ServiceMix is a flexible, open-source integration container that unifies the features and functionality of Apache ActiveMQ, Camel, CXF, and Karaf into a powerful runtime platform you can use to build your own integrations solutions. It provides a complete, enterprise ready ESB exclusively powered by OSGi.
How do I get rid of OSGi?
Uninstalling the OSGi bundle
- Go to the /bin directory under . For example: cd /opt/IBM/WebSphere/AppServer/bin.
- Start the OSGi console: ./osgiConsole.sh .
- From the console, run the following command: uninstall com.ibm.datapower.odc.osgi.
- From the /plugins directory, delete the com. ibm. datapower. odc.
What is OSGi dependency?
All MOTECH modules run in a Felix OSGi framework instance embedded within the platform war. Since everything that is (theoretically) needed to make a library ready for OSGi is adding a few entries in the META-INF/MANIFEST. MF many popular java libraries are already OSGi enabled by default.
What is OSGi Service Registry?
What does the life cycle layer do in OSGi?
The Life Cycle Layer provides an API to control the security and life cycle operations of bundles. The layer is based on the module and security layer. Complete – The Life Cycle layer must implement an API that fully covers the installation, starting, stopping, updating, uninstallation, and monitoring of bundles.
How is OSGi used in the runtime?
The runtime will then automatically load all of its bundles in order of dependency. In OSGi, multiple versions of the same bundle can exist side by side, if that is required by bundle dependencies. OSGi has been around in some form for a couple of decades.
How is OSGi a different approach to Java modularity?
A different approach to Java modularity OSGi facilitates creating and managing modular Java components (called bundles) that can be deployed in a container. As a developer, you use the OSGi specification and tools to create one or more bundles. OSGi defines the lifecycle for these bundles.
What are bundle context and bundle activator in OSGi?
Bundle Context – A bundle’s execution context within the Framework. The Framework passes this to a Bundle Activator when a bundle is started or stopped. Bundle Activator – An interface implemented by a class in a bundle that is used to start and stop that bundle. Bundle Event – An event that signals a life cycle operation on a bundle.