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RFC and ABAP Channels in ABAP Release 7.50 ITOC
ABAP_MODIFICATION_NN Dynamic Destinations in RFC
The methods of the class CL_DYNAMIC_DESTINATION are used to manage dynamic RFC destinations in ABAP_RELEASE 7.50 and higher. In particular, the method CREATE_RFC_DESTINATION makes it possible to create a dynamic destination, which can be used in the current sessions for RFCs.
ABAP_MODIFICATION_NN Point-to-Point Communication for AMC
Alongside the general publish-and-subscribe mechanism, a point-to-point communication option was introduced for the ABAP messaging channels (AMC). Here, a sender object addresses precisely one receiver session. The send action can be either synchronous or asynchronous. This is done using the new factory method CREATE_MESSAGE_PRODUCER_BY_ID of the class CL_AMC_CHANNEL_MANAGER. The ID of a receiver session is provided by the method GET_CONSUMER_SESSION_ID of the same class.
ABAP_MODIFICATION_NN Enhancements for APC
The framework for ABAP channels was expanded as follows:
Alongside communication using the WebSocket protocol, communication using TCP sockets is now also possible.
An AS ABAP used as an APC server can now also stateful. Until now, only stateless servers were possible.
An AS ABAP as operate as an APC client.
Clients known as detached clients make it possible to open an APC connection to a stateless or stateful APC server and then detach it again immediately so that it can be accessed using attached clients.
A connection handle can be used to access existing APC connections across the entire system.
A non-blocking model was introduced for stateful APC applications.
The class CL_APC_TIMER_MANAGER creates timer managers that can be accessed using the interface IF_APC_TIMER_MANAGER. A timer manager makes it possible to start and stop a timer in stateful APC applications in which the statement WAIT is not allowed. The interface IF_APC_TIMER_HANDLER is used to handle timer events. See also the ABAP Channels documentation in SAP Help Portal.
ABAP_MODIFICATION_NN Forbidden Accesses for APC
Up to now, any repeated attempts to bind a push channel to a bound messaging channel or any attempts to remove a nonexistent binding were ignored. From ABAP_RELEASE 7.50, both situations raise an exception.
