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package org.onap.vid.utils;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.onap.vid.exceptions.GenericUncheckedException;
import org.onap.portalsdk.core.FusionObject;
import java.util.HashMap;
import java.util.function.Function;
public class DaoUtils {
//all credit for this wonderful method go to is9613
public static<T> T tryWithSessionAndTransaction(SessionFactory sessionFactory, Function<Session, T> update) {
// opens a session and transactions, executes the input query.
// gracefully close session and transaction once error occurres.
Session session = null;
Transaction tx = null;
try {
session = sessionFactory.openSession();
tx = session.beginTransaction();
T res = update.apply(session);
tx.commit();
return res;
} catch (RuntimeException e) {
try {
if (tx != null) {
tx.rollback();
}
} catch (RuntimeException e2) {
// e2 is ingnored; we would like to know the
// original failure reason, not only the reason
// for rollback's failure
throw new GenericUncheckedException("Failed rolling back transaction", e);
}
throw new GenericUncheckedException("Rolled back transaction", e);
} finally {
if (session != null) {
session.close();
}
}
}
public static HashMap<String, Object> getPropsMap() {
HashMap<String, Object> props = new HashMap<>();
props.put(FusionObject.Parameters.PARAM_USERID, 0);
return props;
}
}
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