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-rw-r--r--utils/src/main/java/org/onap/policy/common/utils/jpa/EntityMgrCloser.java59
-rw-r--r--utils/src/main/java/org/onap/policy/common/utils/jpa/EntityMgrFactoryCloser.java59
-rw-r--r--utils/src/main/java/org/onap/policy/common/utils/jpa/EntityTransCloser.java77
3 files changed, 195 insertions, 0 deletions
diff --git a/utils/src/main/java/org/onap/policy/common/utils/jpa/EntityMgrCloser.java b/utils/src/main/java/org/onap/policy/common/utils/jpa/EntityMgrCloser.java
new file mode 100644
index 00000000..2ed54196
--- /dev/null
+++ b/utils/src/main/java/org/onap/policy/common/utils/jpa/EntityMgrCloser.java
@@ -0,0 +1,59 @@
+/*
+ * ============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.EntityManager;
+
+/**
+ * Wrapper for an <i>EntityManager</i>, providing auto-close functionality. This
+ * is useful in try-with-resources statements.
+ */
+public class EntityMgrCloser implements AutoCloseable {
+
+ /**
+ * The wrapped manager.
+ */
+ private final EntityManager em;
+
+ /**
+ *
+ * @param em
+ * manager to be auto-closed
+ */
+ public EntityMgrCloser(EntityManager em) {
+ this.em = em;
+ }
+
+ /**
+ * Gets the EntityManager wrapped within this object.
+ *
+ * @return the associated EntityManager
+ */
+ public EntityManager getManager() {
+ return em;
+ }
+
+ @Override
+ public void close() {
+ em.close();
+ }
+
+}
diff --git a/utils/src/main/java/org/onap/policy/common/utils/jpa/EntityMgrFactoryCloser.java b/utils/src/main/java/org/onap/policy/common/utils/jpa/EntityMgrFactoryCloser.java
new file mode 100644
index 00000000..8910c087
--- /dev/null
+++ b/utils/src/main/java/org/onap/policy/common/utils/jpa/EntityMgrFactoryCloser.java
@@ -0,0 +1,59 @@
+/*
+ * ============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.EntityManagerFactory;
+
+/**
+ * Wrapper for an <i>EntityManagerFactory</i>, providing auto-close
+ * functionality. This is useful in try-with-resources statements.
+ */
+public class EntityMgrFactoryCloser implements AutoCloseable {
+
+ /**
+ * The wrapped factory.
+ */
+ private final EntityManagerFactory emf;
+
+ /**
+ *
+ * @param emf
+ * manager to be auto-closed
+ */
+ public EntityMgrFactoryCloser(EntityManagerFactory emf) {
+ this.emf = emf;
+ }
+
+ /**
+ * Gets the EntityManagerFactory wrapped within this object.
+ *
+ * @return the associated EntityManagerFactory
+ */
+ public EntityManagerFactory getFactory() {
+ return emf;
+ }
+
+ @Override
+ public void close() {
+ emf.close();
+ }
+
+}
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();
+ }
+ }
+
+}