diff options
Diffstat (limited to 'feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/EntityMgrTrans.java')
-rw-r--r-- | feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/EntityMgrTrans.java | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/EntityMgrTrans.java b/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/EntityMgrTrans.java new file mode 100644 index 00000000..79b620d3 --- /dev/null +++ b/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/EntityMgrTrans.java @@ -0,0 +1,81 @@ +/*- + * ============LICENSE_START======================================================= + * feature-session-persistence + * ================================================================================ + * Copyright (C) 2017 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.drools.persistence; + +import javax.persistence.EntityManager; +import javax.persistence.EntityTransaction; + +/** + * Wrapper for an <i>EntityManager</i> that creates a transaction that is + * auto-rolled back when closed. + */ +public class EntityMgrTrans extends EntityMgrCloser { + + /** + * Transaction to be rolled back. + */ + private EntityTransaction trans; + + /** + * + * @param em + * entity for which a transaction is to be begun + */ + public EntityMgrTrans(EntityManager em) { + super(em); + + try { + trans = em.getTransaction(); + trans.begin(); + + } catch (RuntimeException e) { + em.close(); + throw e; + } + } + + /** + * Commits the transaction. + */ + public void commit() { + trans.commit(); + } + + /** + * Rolls back the transaction. + */ + public void rollback() { + trans.rollback(); + } + + @Override + public void close() { + try { + if (trans.isActive()) { + trans.rollback(); + } + + } finally { + super.close(); + } + } + +} |