1 files changed, 77 insertions, 0 deletions
diff --git a/utils/src/main/java/org/onap/policy/common/utils/jpa/EntityTransCloser.java b/utils/src/main/java/org/onap/policy/common/utils/jpa/EntityTransCloser.java
new file mode 100644
index 00000000..ce300741
--- /dev/null
+++ b/utils/src/main/java/org/onap/policy/common/utils/jpa/EntityTransCloser.java
@@ -0,0 +1,77 @@
+/*
+ * ============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();
+		}
+	}
+
+}