Chapter 13

1. In Keycloak’s code base, SPIs are organized into two main modules, the keycloak-server-spi and keycloak-server-spi-private modules. Public SPIs are located in the keycloak-server-spi module and Keycloak does its best to keep their interfaces backward compatible between releases. These SPIs are also usually documented. On the other hand, private SPIs are not supported in terms of backward compatibility and they usually lack documentation. As a rule of thumb, consider first looking at the SPIs available from the documentation, as they are usually what Keycloak expects people to use for extending the server.
2. In order to deploy your extensions, you must deploy your extension’s JAR file to the $KC_HOME/providers directory and restart the server. If you are using an optimized server image, you should re-run the build command. For more details about running optimized images, look at the documentation at https://www.keycloak.org/server/configuration#_optimize_the_keycloak_startup...