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Welcome to JGrapes

JGrapes is an event driven (message driven) component framework written in Java. It includes support for asynchronous I/O and can be used to build reactive systems. It was inspired by the “circuits framework” written for Python.

Built on the core, the JGrapes framework also includes some complex components such as an HTTP server and a web console provided as component libraries. The framework makes full use of the Java 17 SE environment. The core has no dependencies on additional libraries. The component libraries extending the core have as few dependencies on additional libraries as possible.

The documentation of the framework and its components can be found in the JavaDoc. Make sure to check the package descriptions. They tend to be overlooked because they come after the sometimes rather lengthy list of packages or classes (though the standard layout does put a link to the description at the top of the page). To get started, read the framework’s architectural description on the overview page. This provides an introduction to the concepts, the main classes and links to the details.

A Web Console built on top of the JGrapes framework is described on a page of its own.

All jars have the required information in META-INF/MANIFEST.MF to use them as (library) bundles in an OSGi environment, without introducing a dependency on this environment. Built on top of these libraries, there are some components that fully integrate with OSGi (often just adapters for the basic components). Because they are built in an independant workspace, they have their own Javadoc.