Implement a custom COM interface in Java

Question

I need to pull some data from Java into C#. I am already exposing my C# classes via COM. So I thought a good way to pull data from Java would be to expose IReadStream from C# and implement IReadStream in Java. I can then send an instance of the implementation as a parameter to C# so that I can call IReadStream.Read in C#.

How do I implement a custom COM interface in Java?

You may have to use JNI/JNA to expose a C++ COM interface that your C# class can use. — daanish.rumani
– daanish.rumani, Commented Mar 30, 2009 at 8:57

Joachim Sauer · Accepted Answer · 2009-03-30 09:01:16Z

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I don't know if it supports this direction, but Jacob is a Java COM Bridge that's frequently mentioned.

Also, using IKVM to run the Java code might make the task significantly easier.

answered Mar 30, 2009 at 9:01

Joachim Sauer

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Ries Over a year ago

thanks, i know about jacob. don't think it support what i want to do

mP. · Accepted Answer · 2009-03-30 10:58:20Z

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Using COM sounds overly messy whats wrong with exposing your c# code via a socket and have java suck that down.

answered Mar 30, 2009 at 10:58

mP.

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Ries · Accepted Answer · 2009-03-30 11:02:17Z

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I went for named pipes in the end.

On the java side I write into a named pipe (served from the c# side). In c# i should now be able to read from the named pipe. As long as the Read operation is blocking it should be the same as pulling data from java.

See http://www.codeproject.com/KB/threads/dotnetnamedpipespart1.aspx for a c# wrapper around the Named pipes api calls.

answered Mar 30, 2009 at 11:02

Ries

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