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/*
* ============LICENSE_START=======================================================
* Common Utils
* ================================================================================
* Copyright (C) 2018 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.policy.common.utils.jpa;
import javax.persistence.EntityTransaction;
/**
* Wrapper for an <i>EntityTransaction</i> that is auto-rolled back when closed.
* This is useful in try-with-resources statements.
*/
public class EntityTransCloser implements AutoCloseable {
/**
* Transaction to be rolled back.
*/
private final EntityTransaction trans;
/**
* Begins a transaction.
*
* @param et
* transaction to wrap/begin
*/
public EntityTransCloser(EntityTransaction et) {
trans = et;
trans.begin();
}
/**
* Gets the wrapped transaction.
*
* @return the transaction
*/
public EntityTransaction getTransation() {
return trans;
}
/**
* Commits the transaction.
*/
public void commit() {
trans.commit();
}
/**
* Rolls back the transaction.
*/
public void rollback() {
trans.rollback();
}
@Override
public void close() {
if (trans.isActive()) {
trans.rollback();
}
}
}
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