private static void setKeyProvider(DFSClient dfsClient, KeyProviderCryptoExtension provider)
throws Exception {
Method setKeyProviderHadoop27Method = null;
try {
setKeyProviderHadoop27Method = DFSClient.class.getMethod("setKeyProvider", KeyProvider.class);
} catch (NoSuchMethodException err) {
// We can just use setKeyProvider() as it is
}
if (setKeyProviderHadoop27Method != null) {
// Method signature changed in Hadoop 2.7. Cast provider to KeyProvider
setKeyProviderHadoop27Method.invoke(dfsClient, (KeyProvider) provider);
} else {
dfsClient.setKeyProvider(provider);
}
}
