how to use log4j logger declared in Java side from a dll

Question

We are using a dll with JNA in our java project. We would like the C code to also log to our log4j log files, is there an easy way of doing this?

Answer 1

Not easily, really. I can think of a few ways

• call a Java program within your C code that just calls log4j (slow, you have to load up Java for each logging call)
• leave a Java process running that accepts log requests (communicate with the process using one of the options here Good alternative to shared memory IPC for Java/C++ apps on Linux)
• use GCJ to natively compile a Java program that calls log4j, then link it to your C program