Re: Isthere any open source jrmp (RMI) implementation?

On Wed, May 13, 2009 at 11:03:39AM -0600, Alex Co wrote:
> Hi all,
> I was trying for a while to communicate with a standard RMI server using a 
> custom socket based java client application. Till now without success.
> 
> Note: If I use the RMI client application the server responds well but using the 
> custom socket based app it does not.
> 
> Do you know any public available RMI implementation with open-source?

Sun's JDK implementation is available under GPLv2 through OpenJDK:

        http://openjdk.java.net/

For example, you can browse the JDK 7 master Mercurial repository for
most of the libraries here:

        http://hg.openjdk.java.net/jdk7/jdk7/jdk/

You might want to start by looking at

        src/share/classes/sun/rmi/transport/tcp/TCPChannel.java

> I think that RMI spec is very undetailed and I cant implement client application 
> just reading the rmi spec. Please, could you help me?

A couple of deficiencies are captured in this bug report:

        http://bugs.sun.com/view_bug.do?bug_id=4674902

> After launching RMI server in the port 27000 (i also register it in rmiregistry) I 
> am using the client socket based java application to try to interact with server 
> by connecting to the port 27000 and then sending the message stream stored 
> in this byte array and then i wait for the server reply that never comes...
> 
> byte[] header = {0x4a,0x52,0x4d,0x49,0x00,0x01,0x4b};

As described in the above-mentioned bug report, that 0x01 should be
0x02.

Have you considered analyzing the packets exchanged during the
interactions between a functioning RMI client and server?

-- Peter

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