OSGi Getting Started notes

Source: Internet
Author: User

The OSGi framework defines a dynamic modular system for Java that allows you to better control the structure of your code, dynamically manage the life cycle of your code, and provides a loosely coupled approach to code writing, and more notably, its specification documentation is exhaustive. --"OSGi combat"

OSGi tiering Architecture

Service Layer

Focus on the interaction and communication between the modules, especially the components within the module.

Life cycle Layer

Focus on providing execution-time module management and access to the underlying OSGi framework.

Module layer

Focus on packaging and sharing code

BUNDLE:OSGI defines the concrete implementation of its modular concept, containing code, resources, and metadata in the form of a jar file.

The main difference between bundles and ordinary jars is metadata, which uses metadata to manage its modular features, which are stored in the meta-inf/manifest of the jar file. MF in.

Life Cycle API

Bundleactivator (Start, stop): is a bundle entry, similar to the main method in Java.

Bundlecontext: Provides a way for an application to manipulate the OSGi framework when executing.

Bundle: Represents a bundle that has been installed into the framework, allowing state operations on it.

Maven Plugin: Maven-bundle-plugin

OSGi Getting Started notes

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