Add Start and Stop sessions on JAVA API
Issue-ID: CPS-899
Signed-off-by: emaclee <lee.anjella.macabuhay@est.tech>
Change-Id: Idbeb922790824b1ca601d6d4798df45efa57d685
diff --git a/cps-ri/src/main/java/org/onap/cps/spi/impl/CpsDataPersistenceServiceImpl.java b/cps-ri/src/main/java/org/onap/cps/spi/impl/CpsDataPersistenceServiceImpl.java
index 78862d7..bb3c2d0 100644
--- a/cps-ri/src/main/java/org/onap/cps/spi/impl/CpsDataPersistenceServiceImpl.java
+++ b/cps-ri/src/main/java/org/onap/cps/spi/impl/CpsDataPersistenceServiceImpl.java
@@ -56,6 +56,7 @@
import org.onap.cps.spi.repository.AnchorRepository;
import org.onap.cps.spi.repository.DataspaceRepository;
import org.onap.cps.spi.repository.FragmentRepository;
+import org.onap.cps.spi.utils.SessionManager;
import org.onap.cps.utils.JsonObjectMapper;
import org.springframework.dao.DataIntegrityViolationException;
import org.springframework.stereotype.Service;
@@ -73,6 +74,8 @@
private final JsonObjectMapper jsonObjectMapper;
+ private final SessionManager sessionManager;
+
private static final String REG_EX_FOR_OPTIONAL_LIST_INDEX = "(\\[@[\\s\\S]+?]){0,1})";
private static final Pattern REG_EX_PATTERN_FOR_LIST_ELEMENT_KEY_PREDICATE =
Pattern.compile("\\[(\\@([^\\/]{0,9999}))\\]$");
@@ -199,6 +202,16 @@
.collect(Collectors.toUnmodifiableList());
}
+ @Override
+ public String startSession() {
+ return sessionManager.startSession();
+ }
+
+ @Override
+ public void closeSession(final String sessionId) {
+ sessionManager.closeSession(sessionId);
+ }
+
private static Set<String> processAncestorXpath(final List<FragmentEntity> fragmentEntities,
final CpsPathQuery cpsPathQuery) {
final Set<String> ancestorXpath = new HashSet<>();
diff --git a/cps-ri/src/main/java/org/onap/cps/spi/utils/SessionManager.java b/cps-ri/src/main/java/org/onap/cps/spi/utils/SessionManager.java
new file mode 100644
index 0000000..eb535ec
--- /dev/null
+++ b/cps-ri/src/main/java/org/onap/cps/spi/utils/SessionManager.java
@@ -0,0 +1,86 @@
+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2021-2022 Nordix Foundation
+ * ================================================================================
+ * 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.cps.spi.utils;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+import org.hibernate.HibernateException;
+import org.hibernate.Session;
+import org.hibernate.SessionException;
+import org.hibernate.SessionFactory;
+import org.hibernate.cfg.Configuration;
+import org.onap.cps.spi.entities.AnchorEntity;
+import org.onap.cps.spi.entities.DataspaceEntity;
+import org.onap.cps.spi.entities.SchemaSetEntity;
+import org.onap.cps.spi.entities.YangResourceEntity;
+import org.springframework.stereotype.Component;
+
+@Component
+public class SessionManager {
+
+ private static SessionFactory sessionFactory;
+ private static Map<String, Session> sessionMap = new HashMap<>();
+
+ private synchronized void buildSessionFactory() {
+ if (sessionFactory == null) {
+ sessionFactory = new Configuration().configure("hibernate.cfg.xml")
+ .addAnnotatedClass(AnchorEntity.class)
+ .addAnnotatedClass(DataspaceEntity.class)
+ .addAnnotatedClass(SchemaSetEntity.class)
+ .addAnnotatedClass(YangResourceEntity.class)
+ .buildSessionFactory();
+ }
+ }
+
+ /**
+ * Starts a session which allows use of locks and batch interaction with the persistence service.
+ *
+ * @return Session ID string
+ */
+ public String startSession() {
+ buildSessionFactory();
+ final Session session = sessionFactory.openSession();
+ final String sessionId = UUID.randomUUID().toString();
+ sessionMap.put(sessionId, session);
+ session.beginTransaction();
+ return sessionId;
+ }
+
+ /**
+ * Close session.
+ *
+ * @param sessionId session ID
+ */
+ public void closeSession(final String sessionId) {
+ try {
+ final Session currentSession = sessionMap.get(sessionId);
+ currentSession.getTransaction().commit();
+ currentSession.close();
+ } catch (final NullPointerException e) {
+ throw new SessionException(String.format("Session with session ID %s does not exist", sessionId));
+ } catch (final HibernateException e) {
+ throw new SessionException(String.format("Unable to close session with session ID %s", sessionId));
+ }
+ sessionMap.remove(sessionId);
+ }
+
+}
\ No newline at end of file
diff --git a/cps-ri/src/main/resources/hibernate.cfg.xml b/cps-ri/src/main/resources/hibernate.cfg.xml
new file mode 100644
index 0000000..98e6cfc
--- /dev/null
+++ b/cps-ri/src/main/resources/hibernate.cfg.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE hibernate-configuration PUBLIC
+ "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
+ "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
+
+<hibernate-configuration>
+ <session-factory>
+ <property name="hibernate.connection.driver_class">org.postgresql.Driver</property>
+ <property name="hibernate.connection.url">jdbc:postgresql://${DB_HOST}:${DB_PORT:5432}/cpsdb</property>
+ <property name="hibernate.connection.username">${DB_USERNAME}</property>
+ <property name="hibernate.connection.password">${DB_PASSWORD}</property>
+ <property name="hibernate.dialect">org.hibernate.dialect.PostgreSQL82Dialect</property>
+ <property name="show_sql">true</property>
+ <property name="hibernate.hbm2ddl.auto">update</property>
+ </session-factory>
+</hibernate-configuration>
\ No newline at end of file