Class Summary Class Description AbstractAjpProtocol<S>The is the base implementation for the AJP protocol handlers. AjpAprProtocol Deprecated.The APR/Native Connector will be removed in Tomcat 10.1.x onwards. AjpMessageA single packet for communication between the web server and the container. AjpNio2ProtocolThis the NIO2 based protocol handler implementation for AJP. AjpNioProtocolThis the NIO based protocol handler implementation for AJP. AjpProcessorAJP Processor implementation. AjpProtocol Deprecated.This class will be removed in Tomcat 9. ConstantsConstants.