My Technical Notes: Java ServiceLoader Example



My Technical Notes: Java ServiceLoader Example

Java ServiceLoader Example

Defining an API and developing the corresponding implementation has become an uber mainstream practice when developing large Java applications. Modularization is such an useful design principle, especially to avoid spaghetti code, for testing and debugging, and for re-implementation of old code.

Many developers seek to separate API interfaces and abstract classes from their implementation in separate packages. Yet, this almost always leads to cycles between java packages (api refers to impl, and vice-versa). There has been many frameworks, such as OSGi, supporting modularization, but the documentation has not always been good and complete. Many developers have struggled with class loading issues too.

Fortunately, Java has delivered the ServiceLoader utility since release 6. The example described in this post is available from Github in the Java-ServiceLoader directory. It is inspired from here.

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