Integration is largely transparent. You import the logging framework into the PipelineComponentRuntime and call getLogger(). If any logging requests come in from any of the frameworks, the Content Acquisition System detects the requests and redirects them to Log4J which CAS then uses to write to cas-service.log.

For example, if you are using SLF4J, integration is similar to the following:

import org.slf4j.LoggerFactory
...

LoggerFactory.getLogger(getClass()).info("A logging message.");