Adding plugin-persistence module to apex-pdp

Change-Id: I68e16b1aad6e7b943439c207816479d151f672fb
Issue-ID: POLICY-862
Signed-off-by: ramverma <ram.krishna.verma@ericsson.com>

2 files changed, 304 insertions, 0 deletions

diff --git a/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-hibernate/src/main/java/org/onap/policy/apex/plugins/persistence/jpa/hibernate/HibernateApexDao.java b/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-hibernate/src/main/java/org/onap/policy/apex/plugins/persistence/jpa/hibernate/HibernateApexDao.java
new file mode 100644
index 000000000..2d60e3751
--- /dev/null
+++ b/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-hibernate/src/main/java/org/onap/policy/apex/plugins/persistence/jpa/hibernate/HibernateApexDao.java
@@ -0,0 +1,276 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2016-2018 Ericsson. 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.plugins.persistence.jpa.hibernate;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+
+import javax.persistence.EntityManager;
+
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.basicmodel.concepts.AxConcept;
+import org.onap.policy.apex.model.basicmodel.concepts.AxReferenceKey;
+import org.onap.policy.apex.model.basicmodel.dao.impl.DefaultApexDao;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+/**
+ * The Class HibernateApexDao is the Hibernate JPA implementation of the Apex DAO.
+ *
+ * @author Sergey Sachkov (sergey.sachkov@ericsson.com)
+ */
+public class HibernateApexDao extends DefaultApexDao {
+    private static final XLogger LOGGER = XLoggerFactory.getXLogger(HibernateApexDao.class);
+
+    private static final String FROM = "FROM ";
+    private static final String DELETE_FROM = "DELETE FROM ";
+    private static final String WHERE_KEY_NAME = " WHERE key.name='";
+    private static final String AND_KEY_VERSION = "' AND key.version='";
+    private static final String WHERE_KEY_PARENT_KEY_NAME = " WHERE key.parentKeyName='";
+    private static final String AND_KEY_PARENT_KEY_VERSION = "' AND key.parentKeyVersion='";
+    private static final String AND_KEY_LOCAL_NAME = "' AND key.localName='";
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.model.basicmodel.dao.impl.DefaultApexDao#delete(java.lang.Class,
+     * org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey)
+     */
+    @Override
+    public <T extends AxConcept> void delete(final Class<T> aClass, final AxArtifactKey key) {
+        if (key == null) {
+            return;
+        }
+        final EntityManager mg = getEntityManager();
+        try {
+            mg.getTransaction().begin();
+            mg.createQuery(DELETE_FROM + aClass.getSimpleName() + WHERE_KEY_NAME + key.getName() + AND_KEY_VERSION
+                    + key.getVersion() + "'").executeUpdate();
+            mg.getTransaction().commit();
+        } finally {
+            mg.close();
+        }
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.model.basicmodel.dao.impl.DefaultApexDao#delete(java.lang.Class,
+     * org.onap.policy.apex.model.basicmodel.concepts.AxReferenceKey)
+     */
+    @Override
+    public <T extends AxConcept> void delete(final Class<T> aClass, final AxReferenceKey key) {
+        if (key == null) {
+            return;
+        }
+        final EntityManager mg = getEntityManager();
+        try {
+            mg.getTransaction().begin();
+            mg.createQuery(DELETE_FROM + aClass.getSimpleName() + WHERE_KEY_PARENT_KEY_NAME + key.getParentKeyName()
+                    + AND_KEY_PARENT_KEY_VERSION + key.getParentKeyVersion() + AND_KEY_LOCAL_NAME + key.getLocalName()
+                    + "'").executeUpdate();
+            mg.getTransaction().commit();
+        } finally {
+            mg.close();
+        }
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.model.basicmodel.dao.impl.DefaultApexDao#deleteByArtifactKey(java.lang.Class,
+     * java.util.Collection)
+     */
+    @Override
+    public <T extends AxConcept> int deleteByArtifactKey(final Class<T> aClass, final Collection<AxArtifactKey> keys) {
+        if (keys == null || keys.isEmpty()) {
+            return 0;
+        }
+        int deletedCount = 0;
+        final EntityManager mg = getEntityManager();
+        try {
+            mg.getTransaction().begin();
+            for (final AxArtifactKey key : keys) {
+                deletedCount += mg.createQuery(DELETE_FROM + aClass.getSimpleName() + WHERE_KEY_NAME + key.getName()
+                        + AND_KEY_VERSION + key.getVersion() + "'").executeUpdate();
+            }
+            mg.getTransaction().commit();
+        } finally {
+            mg.close();
+        }
+        return deletedCount;
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.core.model.dao.ApexDao#deleteByContextUsageKey(java.lang.Class, java.util.Collection)
+     */
+    @Override
+    public <T extends AxConcept> int deleteByReferenceKey(final Class<T> aClass,
+            final Collection<AxReferenceKey> keys) {
+        if (keys == null || keys.isEmpty()) {
+            return 0;
+        }
+        int deletedCount = 0;
+        final EntityManager mg = getEntityManager();
+        try {
+            mg.getTransaction().begin();
+            for (final AxReferenceKey key : keys) {
+                deletedCount += mg.createQuery(DELETE_FROM + aClass.getSimpleName() + WHERE_KEY_PARENT_KEY_NAME
+                        + key.getParentKeyName() + AND_KEY_PARENT_KEY_VERSION + key.getParentKeyVersion()
+                        + AND_KEY_LOCAL_NAME + key.getLocalName() + "'").executeUpdate();
+            }
+            mg.getTransaction().commit();
+        } finally {
+            mg.close();
+        }
+        return deletedCount;
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.core.model.dao.ApexDao#deleteAll(java.lang.Class)
+     */
+    @Override
+    public <T extends AxConcept> void deleteAll(final Class<T> aClass) {
+        final EntityManager mg = getEntityManager();
+        try {
+            mg.getTransaction().begin();
+            mg.createQuery(DELETE_FROM + aClass.getSimpleName()).executeUpdate();
+            mg.getTransaction().commit();
+        } finally {
+            mg.close();
+        }
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.core.model.dao.ApexDao#getAll(java.lang.Class)
+     */
+    @Override
+    public <T extends AxConcept> List<T> getAll(final Class<T> aClass) {
+        if (aClass == null) {
+            return Collections.emptyList();
+        }
+        final EntityManager mg = getEntityManager();
+        try {
+            final List<T> result = mg.createQuery(FROM + aClass.getSimpleName(), aClass).getResultList();
+            final List<T> cloneResult = new ArrayList<>();
+            for (final T t : result) {
+                try {
+                    final T clonedT = aClass.newInstance();
+                    t.copyTo(clonedT);
+                    cloneResult.add(clonedT);
+                } catch (final Exception e) {
+                    LOGGER.warn("Could not clone object of class \"" + aClass.getCanonicalName() + "\"", e);
+                    return cloneResult;
+                }
+            }
+            return cloneResult;
+        } finally {
+            mg.close();
+        }
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.core.model.dao.ApexDao#getAll(java.lang.Class,
+     * org.onap.policy.apex.core.model.concepts.AxArtifactKey)
+     */
+    @Override
+    public <T extends AxConcept> List<T> getAll(final Class<T> aClass, final AxArtifactKey parentKey) {
+        if (aClass == null) {
+            return Collections.emptyList();
+        }
+        final EntityManager mg = getEntityManager();
+        try {
+            return mg.createQuery(FROM + aClass.getSimpleName() + WHERE_KEY_PARENT_KEY_NAME + parentKey.getName()
+                    + AND_KEY_PARENT_KEY_VERSION + parentKey.getVersion() + "'", aClass).getResultList();
+        } finally {
+            mg.close();
+        }
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.core.model.dao.ApexDao#getArtifact(java.lang.Class,
+     * org.onap.policy.apex.core.model.concepts.AxArtifactKey)
+     */
+    @Override
+    public <T extends AxConcept> T getArtifact(final Class<T> aClass, final AxArtifactKey key) {
+        if (aClass == null || key == null) {
+            return null;
+        }
+        final EntityManager mg = getEntityManager();
+        List<T> ret;
+        try {
+            ret = mg.createQuery(FROM + aClass.getSimpleName() + WHERE_KEY_NAME + key.getName() + AND_KEY_VERSION
+                    + key.getVersion() + "'", aClass).getResultList();
+        } finally {
+            mg.close();
+        }
+        if (ret == null || ret.isEmpty()) {
+            return null;
+        }
+        if (ret.size() > 1) {
+            throw new IllegalArgumentException("More than one result was returned for search for " + aClass
+                    + " with key " + key.getID() + ": " + ret);
+        }
+        return ret.get(0);
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.onap.policy.apex.core.model.dao.ApexDao#getArtifact(java.lang.Class,
+     * org.onap.policy.apex.core.model.concepts.AxReferenceKey)
+     */
+    @Override
+    public <T extends AxConcept> T getArtifact(final Class<T> aClass, final AxReferenceKey key) {
+        if (aClass == null || key == null) {
+            return null;
+        }
+        final EntityManager mg = getEntityManager();
+        List<T> ret;
+        try {
+            ret = mg.createQuery(FROM + aClass.getSimpleName() + WHERE_KEY_PARENT_KEY_NAME + key.getParentKeyName()
+                    + AND_KEY_PARENT_KEY_VERSION + key.getParentKeyVersion() + AND_KEY_LOCAL_NAME + key.getLocalName()
+                    + "'", aClass).getResultList();
+        } finally {
+            mg.close();
+        }
+        if (ret == null || ret.isEmpty()) {
+            return null;
+        }
+        if (ret.size() > 1) {
+            throw new IllegalArgumentException("More than one result was returned for search for " + aClass
+                    + " with key " + key.getID() + ": " + ret);
+        }
+        return ret.get(0);
+    }
+}
diff --git a/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-hibernate/src/main/java/org/onap/policy/apex/plugins/persistence/jpa/hibernate/package-info.java b/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-hibernate/src/main/java/org/onap/policy/apex/plugins/persistence/jpa/hibernate/package-info.java
new file mode 100644
index 000000000..036d45d5d
--- /dev/null
+++ b/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-hibernate/src/main/java/org/onap/policy/apex/plugins/persistence/jpa/hibernate/package-info.java
@@ -0,0 +1,28 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2016-2018 Ericsson. 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ * Provides the <a href="http://hibernate.org/">Hibernate</a> implementation on the APEX DAO for persistence over
+ * <a href="https://en.wikipedia.org/wiki/Java_Database_Connectivity">JDBC</a>.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+
+package org.onap.policy.apex.plugins.persistence.jpa.hibernate;