On Jun 26, 2012, at 10:24 AM, exabrial wrote: > The Telephone example uses the following protocol URL: > "ejbd://localhost:4201" > > First Question: Is the underlying RMI protocol JRMP, IIOP/CORBA or is ejbd a > separate wire protocol on it's own? I'm curious from a performance > perspective, as JRMP has been shown to be as fast as Hessian, both of which > is faster than IIOP/CORBA.
It's a custom binary protocol that can be layered over a plain socket or HTTP, but for the most part is ObjectInputStream/ObjectOutputStream. I'll note that the format of the protocol has almost no baring on the speed of the communication. The biggest factors are connection handling/pooling, buffering and the size of the objects sent back and forth. We did a considerable amount of work in that area a few years ago: http://markmail.org/message/uhur6td3lafxva5x Should give some indication of the performance characteristics. > Second question: Is it possible to change the protocol which OpenEJB uses? There's an API for doing that, yes. OpenEJB has always had a strict server/container contract so that exposing new protocols can be done without modifying internals. Geronimo supports a CORBA integration for example. Doing so is a development task though, not a configuration task. -David
