Remote Procedure Calls (RPC) RPC is a distributed programming paradigm that allows multiple computers to execute remote procedures as if they were local. Th...
Remote Procedure Calls (RPC)
RPC is a distributed programming paradigm that allows multiple computers to execute remote procedures as if they were local. This technique enables programmers to build distributed applications that can run on different machines without requiring them to be physically connected.
Semantics:
Client: The client initiates a RPC call by sending a request message containing the procedure name and its arguments to a remote server.
Server: The server receives the request and executes the procedure on the client's behalf.
Remote Procedure Invocation Interface (RPCI): An RPCI is a software interface that acts as an intermediary between the client and server. It handles communication, authentication, and procedure execution.
Binding: The client and server establish a binding that establishes a channel for communication. This binding is specific to a particular procedure and machine.
Remote Procedure Invocation (RPC): When the client invokes a procedure, the RMCI sends a remote procedure invocation message to the server.
Server Invocation: The server receives the message and executes the procedure on the client's behalf.
Return Value: The server sends the return value back to the client through the RMCI.
Implementation:
Creates an RPC stub, which is a proxy object that acts as an intermediary between the client and server.
Uses the stub to send RPC requests and receive RPC responses.
Creates an RPC server, which listens for requests on the designated port.
Defines the procedure and its corresponding callback function.
The client and server establish a binding, specifying the remote procedure to be executed.
This binding is typically maintained throughout the duration of the communication.
The client invokes a procedure by sending a request message to the server's RPCI.
The client receives the remote procedure call back through the RMCI.
The server receives the request and invokes the procedure on the client's behalf.
The server waits for the completion of the procedure and sends the return value back to the client through the RMCI.
The client receives the return value and processes it according to the specified data type.
The client can also send additional messages back to the server