Rendezvous API Architecture

Messages carry data among program processes or threads.

Messages contain self-describing data fields. Programs can manipulate message fields, send messages, and receive messages.

Programs create event objects to register interest in significant conditions. For example, dispatching a listener event notifies the program that a message has arrived; dispatching a timer event notifies the program that its interval has elapsed.

Programs define event callback functions to process events.

Programs create event queues to organize events. A queue holds a sequence of event objects that are ready for dispatch.

Programs create event queue groups to prioritize event processing.

Programs dispatch events from queues or queue groups, processing each event with the corresponding callback function.

Programs use transport objects to send messages and listen for messages. A transport determines three aspects of message delivery:

Transport objects of various types combine these aspects to yield different qualities of service—for example, intra-process delivery, network delivery, reliable delivery, certified delivery, distributed queue delivery.