Tecnic of synchronization for Servers RMI

Hello Guys! I'm with problem os synchronization in my Facade(service RMI). My Facade are like Session Facade(EJB) and they publish the remote method's. The problem is that if I synchronize the method, he lock my others object's. My architecture is:

GUI --> Delegate --------------RMI--------------- Facade --> Bussines -->DAO.

So, when i call the folowing method, for example:

public synchronized int gravar(UGTO ug) throws RemoteException {
        int iRetorno = 0;
        SessionPool.getInstancia().createSession(Thread.currentThread().getId());

        try{
            iRetorno = getUGBusiness().gravar(ug);

            SessionPool.getInstancia().finalizaSecao(Thread.currentThread().getId(), Session.Finalizar.SUCESSO);
        } catch(WorkflowException e){
            SessionPool.getInstancia().finalizaSecao(Thread.currentThread().getId(), Session.Finalizar.FALHA);
            throw e;
        } finally {
            SessionPool.getInstancia().removeSession(Thread.currentThread().getId());
        }

        return iRetorno;
    }

I lock all synchronized method's and lose performance )-: ...  So the question is: Exist some technique or pattern that solve this?

Thankx!!

Obs.: Sorry for my english.

A Paz!!
Paulo Henrique


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