How to implement observer pattern in C++, calling Java method in JNI

Question

I have code that is implementing an observer pattern in C++. I have created Java JNI code that is similar to C++ code to register an observer. When I register an observer in Java, it calls a native method that create a listener in C++.

I want the method calls in C++ to call the equivalent methods in my Java observer that is registered. I have created code for this by passing the JNIEnv to the observer class in C++, but I've heard this isn't safe. Is there a best practice on this type of implementation?

Community · Accepted Answer · 2017-05-23 12:13:03Z

0

You can use SWIG directors per the answer to this question: How to pass java function pointer to c++ native code

I would also recommend using SWIG instead of JNI directly.

edited May 23, 2017 at 12:13

CommunityBot

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answered Feb 13, 2014 at 5:18

Bob Nadler

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