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/*-
* ============LICENSE_START=======================================================
* VID
* ================================================================================
* Copyright (C) 2017 - 2019 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
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.domain.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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