github.com/renevo/rpc (go): Package rpc provides access to the exported methods of an object across a network or other I/O connection.  A server registers an object, making it visible as a service with the name of the type of the object.  After registration, exported methods of the object will be accessible remotely.  A server may register multiple objects (services) of different types but it is an error to register multiple objects of the same type.  Only methods that satisfy these criteria will be made available for remote access; other methods will be ignored:  In effect, the method must look schematically like  where T1 and T2 can be marshaled by encoding/gob. These requirements apply even if a different codec is used. (In the future, these requirements may soften for custom codecs.)  The method's second argument represents the arguments provided by the caller; the third argument represents the result parameters to be returned to the caller. The method's return value, if non-nil, is passed back as a string that the client sees as if created by errors.New.  If an error is returned, the reply parameter will not be sent back to the client.  The server may handle requests on a single connection by calling ServeConn.  More typically it will create a network listener and call Accept.  A client wishing to use the service establishes a connection and then invokes NewClient on the connection.  The convenience function Dial performs both steps for a raw network connection.  The resulting Client object has two methods, Call and Go, that specify the service and method to call, a context, a pointer containing the arguments, and a pointer to receive the result parameters.  The Call method waits for the remote call to complete or the context.Context to complete while the Go method launches the call asynchronously and signals completion using the Call structure's Done channel.  Unless an explicit codec is set up, package encoding/gob is used to transport the data.  Here is a simple example.  A server wishes to export an object of type Arith:  The server calls (for HTTP service):  At this point, clients can see a service "Arith" with methods "Arith.Multiply" and "Arith.Divide".  To invoke one, a client first dials the server:  Then it can make a remote call:  or  A server implementation will often provide a simple, type-safe wrapper for the client.
Keywords: go|rpc|tracing