1 files changed, 116 insertions, 0 deletions
diff --git a/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/JpaDroolsSessionConnector.java b/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/JpaDroolsSessionConnector.java
new file mode 100644
index 00000000..76c09681
--- /dev/null
+++ b/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/JpaDroolsSessionConnector.java
@@ -0,0 +1,116 @@
+/*-
+ * ============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.EntityManagerFactory;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+
+public class JpaDroolsSessionConnector implements DroolsSessionConnector {
+
+	private static Logger logger = LoggerFactory.getLogger(JpaDroolsSessionConnector.class);
+		
+	private final EntityManagerFactory emf;
+	
+	
+	public JpaDroolsSessionConnector(EntityManagerFactory emf) {
+		this.emf = emf;
+	}
+
+	@Override
+	public DroolsSession get(String sessName) {
+
+		EntityManager em = emf.createEntityManager();
+		DroolsSessionEntity s = null;
+		
+		try(EntityMgrTrans trans = new EntityMgrTrans(em)) {
+			
+			s = em.find(DroolsSessionEntity.class, sessName);
+			if(s != null) {
+				em.refresh(s);
+			}
+
+			trans.commit();
+		}
+
+		return s;
+	}
+
+	@Override
+	public void replace(DroolsSession sess) {
+		String sessName = sess.getSessionName();
+		
+		logger.info("replace: Entering and manually updating session name= {}", sessName);
+		
+		EntityManager em = emf.createEntityManager();
+		
+		try(EntityMgrTrans trans = new EntityMgrTrans(em)) {
+			
+			if( ! update(em, sess)) {
+				add(em, sess);
+			}
+		
+			trans.commit();
+		}
+		
+		logger.info("replace: Exiting");
+	}
+
+	/**
+	 * Adds a session to the persistent store.
+	 * @param em	entity manager
+	 * @param sess	session to be added
+	 */
+	private void add(EntityManager em, DroolsSession sess) {
+		logger.info("add: Inserting session id={}", sess.getSessionId());
+
+		DroolsSessionEntity ent =
+				new DroolsSessionEntity(
+						sess.getSessionName(),
+						sess.getSessionId());
+		
+		em.persist(ent);
+	}
+	
+	/**
+	 * Updates a session, if it exists within the persistent store.
+	 * @param em	entity manager
+	 * @param sess	session data to be persisted
+	 * @return {@code true} if a record was updated, {@code false} if it
+	 * 			was not found
+	 */
+	private boolean update(EntityManager em, DroolsSession sess) {
+		
+		DroolsSessionEntity s =
+				em.find(DroolsSessionEntity.class, sess.getSessionName());
+		if(s == null) {
+			return false;
+		}
+
+		logger.info("update: Updating session id to {}", sess.getSessionId());
+		s.setSessionId( sess.getSessionId());
+		
+		return true;
+	}
+}