Project Lead: Michal Cmarada
JVPP is a VPP module providing Java APIs for VPP. Java APIs provide a way for a JVM application to access and manage VPP. Main use of JVPP is in Honeycomb project. Honeycomb relies heavily on JVPP to access and manage VPP.
JVPP contains of manually crafted code together with generated classes. Classes are being generated by python based on VPP API json files. Generated code represents various Java classes (Callbacks, callfacades, DTOs, types ...) and jni header files.
VppRegistry opens connection to VPP (VppConnection) and manages JVPP plugins. Each plugin needs to be registered in the VppRegistry. Registration involves plugin initialization (providing JNI implementation with JVppCallback reference, VPP client identifier and VPP shared memory queue address).
API user sends message by calling a method of appropriate plugin interface. The call is delegated to JNI implementation provided by the particular plugin. When JNI code receives reply, it invokes callback method of JVppCallback that corresponds to the received message reply.
Components marked with an asterisk (*) contain manually crafted code, which in addition to generated classes form jvpp. Exception applies to Callbacks and DTOs, since there are manually crafted marker interfaces in callback and dto package (dto/JVppRequest, dto/JVppReply, dto/JVppDump, dto/JVppReplyDump, callback/JVppCallback)