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authorJim Hahn <jrh3@att.com>2018-02-09 12:20:56 -0500
committerJim Hahn <jrh3@att.com>2018-02-10 17:04:33 -0500
commit86664073b5a778c56e831d64b3a1883818af0ffe (patch)
tree9842efab59b2737c48c0aa1b0763f802fc708a9b /utils/src/main/java
parente9fd35a303a5f5f41726c3216c8acd7598a3a494 (diff)
Add AutoClose wrappers for JPA classes
Added EntityMgrCloser and EntityMgrTrans classes that will automatically close/rollback the wrapped JPA classes. As a result, these classes can be used in try-with-resource statements to ensure that the JPA EntityTransaction is rolled back and the EntityManager is closed. Add "build" section into pom to make it consistent with other poms in common. Changed scope to "provided" in utils pom for javax.persistence to prevent clashes with other projects that depend on the utils project. Changed scope to "test" in utils pom and to "provided" in utils-test pom for junit. Fixed license date in EntityTransCloser. Fixed license titles in utils & utils-test source files. Moved files from package xxx.test.jpa to package xxx.jpa, because they are not test-specific classes. Include exception when logging message in ThrowablesTester, hopefully eliminating sonar complaint. Change-Id: I531f20d93a679d4bb432c1d75c1feac0e334bc44 Issue-ID: POLICY-582 Signed-off-by: Jim Hahn <jrh3@att.com>
Diffstat (limited to 'utils/src/main/java')
-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();
+ }
+ }
+
+}