Summary

We conclude this chapter after having gone through a fairly detailed overview of the architecture of Apache Geronimo, as well as the base pattern behind the Geronimo kernel— that is, dependency injection. We have covered GBeans, configurations, dependencies, and the repository. We then had a look at the high-level architecture of Apache Geronimo. We covered the functionality that the Apache Geronimo kernel exposes and had a look at the class loader hierarchy in Apache Geronimo. We listed the important system-level modules and explained the difference between normal and deployer modules. Finally, we discussed the deployment architecture and plugins.

This brings us to the end of the chapter on the Apache Geronimo architecture. The authors hope that you now have a fairly detailed understanding of the Kernel and that you will be able to understand the Apache Geronimo source code better with this in mind. In the next chapter, you will learn about configuring database connectivity and using the Apache Derby database embedded in Apache Geronimo.