What is the underlying theme in OSGi?
osgi
Solution
If you look closer, the concept of classpath in Java really sucks.
You distribute your classes in JAR files, but during runtime Java will (almost) blindly throw all the classes from all the JAR files into one big bag where classes with the same name overshadow each other and then interact in unexpected ways.
OSGi brings a proper runtime modularity to Java platform and on top of that a powerful service model, sometimes referred to as "SOA inside the JVM".
I would strongly recommend reading some introductory articles about OSGi that will give a more concrete idea of what this all means. A good starting point might be the series of articles on InfoQ about Java modularity by Alex Blewitt:
- Modular Java: What Is It?
- Modular Java: Static Modularity
- Modular Java: Dynamic Modularity
Problem
OSGi is a dynamic modular system for Java. Ok, but what is the base line theme, why was OSGi developed? What are the benifits of using OSGi? What is the main story of developing OSGi? Why does it exist?