Posted by Nick Johnson | Filed under tech, app-engine, coding, java In a previous post, we discussed API call hooks for Python. It's possible to hook and modify RPC calls in Java, too. In this post, we'll demonstrate how. All API calls in Java are handled by the class com.google.apphosting.api.ApiProxy. This class behaves similarly to the ApiProxyStubMap in the Python SDK, having makeSyncCall and