Status of Ruby<->Java Interfaces

ruby-talk
1

Hi,

I have a Java program that I'd like to access with Ruby, and I'm
looking for the 'right tool for the job'. The Java program is an API
collection of classes that implement a network/socket protocol, and
I'd like to find a way to have Ruby make the calls, e.g.
Java:
public class MySocket {
    private Socket m_socket; // the socket
    private DataOutputStream m_dos; // the socket
output stream
    /////more stuff here....
    private void send( String str) throws IOException {
        m_dos.write( str.getBytes() );
        m_dos.write( EOL);
    }
}

and I'd like to be able to do something like:
Ruby:
mysock=Java.Class.MySockect.new (or something along these lines)
mysock.send("Hello there")

So what is the state of the world with the various options that exist
in Ruby for this sort of thing? I've had a brief look at rjni, rjava
and rjb. Each of which seem to be quite 'alpha'. Any comments,
suggestions on which is best? Any other options in terms of design?
Will these work with network/socket classes in Java?

Thanks in advance!
Jeff

2

I have know experience with any Java <-> Ruby bridges, but sine I know it exists and I didn't see you mention it, have you checked out JRuby? Just a thought.

James Edward Gray II

···

On Oct 7, 2004, at 3:44 PM, Jeff wrote:

So what is the state of the world with the various options that exist
in Ruby for this sort of thing? I've had a brief look at rjni, rjava
and rjb. Each of which seem to be quite 'alpha'. Any comments,
suggestions on which is best? Any other options in terms of design?
Will these work with network/socket classes in Java?

3

Is there any particular reason you can't use the ruby sockets interface in this case?

Randy.

···

On 10/7/2004 4:44 PM, Jeff wrote:

Hi,

I have a Java program that I'd like to access with Ruby, and I'm
looking for the 'right tool for the job'. The Java program is an API
collection of classes that implement a network/socket protocol, and
I'd like to find a way to have Ruby make the calls, e.g.

4

>So what is the state of the world with the various options that exist
>in Ruby for this sort of thing? I've had a brief look at rjni, rjava
>and rjb.

rjb is the only one actively developed atm., so it's probably the best
option.

I stopped working on rjni when I discovered that the JVM was interacting
with the signals ruby uses to implement threads (so that Ruby threads
wouldn't work) and realized that the non-reentrancy of ruby 1.x made
this all quite hard...

Each of which seem to be quite 'alpha'. Any comments,
>suggestions on which is best? Any other options in terms of design?
>Will these work with network/socket classes in Java?

The main problem would be when you have multiple Java threads; that's
hard to handle in 1.x, at least if you're using JNI directly.

···

On Fri, Oct 08, 2004 at 06:24:42AM +0900, James Edward Gray II wrote:

On Oct 7, 2004, at 3:44 PM, Jeff wrote:

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