// should be called after session registry is checked
private FunctionInfo registerToSessionRegistry(String qualifiedName, FunctionInfo function) {
FunctionInfo ret = null;
ClassLoader prev = Utilities.getSessionSpecifiedClassLoader();
try {
// Found UDF in metastore - now add it to the function registry
// At this point we should add any relevant jars that would be needed for the UDf.
FunctionResource[] resources = function.getResources();
try {
FunctionTask.addFunctionResources(resources);
} catch (Exception e) {
LOG.error("Unable to load resources for " + qualifiedName + ":" + e, e);
return null;
}
ClassLoader loader = Utilities.getSessionSpecifiedClassLoader();
Class<?> udfClass = Class.forName(function.getClassName(), true, loader);
ret = FunctionRegistry.registerTemporaryUDF(qualifiedName, udfClass, resources);
if (ret == null) {
LOG.error(function.getClassName() + " is not a valid UDF class and was not registered.");
}
if (SessionState.get().isHiveServerQuery()) {
SessionState.getRegistryForWrite().addToUDFLoaders(loader);
}
} catch (ClassNotFoundException e) {
// Lookup of UDf class failed
LOG.error("Unable to load UDF class: " + e);
Utilities.restoreSessionSpecifiedClassLoader(prev);
}
function.shareStateWith(ret);
return ret;
}
