Documentation

Implicit parameters

You can implicitly pass parameters between service consumers and providers via setAttachment andgetAttachment on RpcContext. /user-guide/images/context.png

Set the implicit parameters at service consumer side

Via setAttachment on RpcContext set key/value pair for implicitly pass parameters.When finished once remote invoke,will be clear,so multi-invoke must set multi-times.

RpcContext.getContext().setAttachment("index", "1"); // implicitly pass parameters,behind the remote call will implicitly send these parameters to the server side, similar to the cookie, for the framework of integration, not recommended for regular business use
xxxService.xxx(); // remote call
// ...

Fetch the implicit parameters at service provider side

public class XxxServiceImpl implements XxxService {

    public void xxx() {
        // get parameters which passed by the consumer side,for the framework of integration, not recommended for regular business use
        String index = RpcContext.getContext().getAttachment("index");
    }
}