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/*-
* ============LICENSE_START=======================================================
* ONAP-PAP-REST
* ================================================================================
* Copyright (C) 2017-2018 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.pap.xacml.rest.util;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Query;
import org.onap.policy.rest.XacmlAdminAuthorization;
import org.onap.policy.rest.jpa.GlobalRoleSettings;
import org.onap.policy.common.logging.flexlogger.FlexLogger;
import org.onap.policy.common.logging.flexlogger.Logger;
public class JPAUtils {
private static final Logger LOGGER = FlexLogger.getLogger(JPAUtils.class);
private static EntityManagerFactory emf;
private static JPAUtils currentInstance = null;
/**
* Get an instance of a JPAUtils. It creates one if it does not exist.
* Only one instance is allowed to be created per server.
* @param emf The EntityFactoryManager to be used for database connections
* @return The new instance of JPAUtils or throw exception if the given emf is null.
* @throws IllegalStateException if a JPAUtils has already been constructed. Call getJPAUtilsInstance() to get this.
*/
public static JPAUtils getJPAUtilsInstance(EntityManagerFactory emf){
LOGGER.debug("getJPAUtilsInstance(EntityManagerFactory emf) as getJPAUtilsInstance("+emf+") called");
if(currentInstance == null){
if(emf != null){
currentInstance = new JPAUtils(emf);
return currentInstance;
}
throw new IllegalStateException("The EntityManagerFactory is Null");
}
return currentInstance;
}
private JPAUtils(EntityManagerFactory emf){
LOGGER.debug("JPAUtils(EntityManagerFactory emf) as JPAUtils("+emf+") called");
JPAUtils.emf = emf;
}
/**
* Returns the lockdown value, in case of exception it is assumed that lockdown functionality
* is not supported and returns false.
*
*
* @throws ReadOnlyException
* @throws ConversionException
*/
public boolean dbLockdownIgnoreErrors() {
if (LOGGER.isTraceEnabled())
LOGGER.trace("ENTER");
boolean lockdown = false;
try {
lockdown = dbLockdown();
} catch (Exception e) {
LOGGER.warn("Cannot access DB lockdown value", e);
}
return lockdown;
}
/**
* Returns the lockdown value from the database.
*
* @throws ReadOnlyException
* @throws ConversionException
*/
public boolean dbLockdown()
throws IllegalAccessException {
if (LOGGER.isTraceEnabled())
LOGGER.trace("ENTER");
EntityManager em = emf.createEntityManager();
Query globalRoleSettingsJPA = em.createNamedQuery("GlobalRoleSettings.findAll");
GlobalRoleSettings globalRoleSettings = (GlobalRoleSettings) globalRoleSettingsJPA.getSingleResult();
if (globalRoleSettings == null) {
// this should not happen
String msg = "NO GlobalSetttings for " + XacmlAdminAuthorization.Role.ROLE_SUPERADMIN.toString();
if (LOGGER.isErrorEnabled())
LOGGER.error(msg);
throw new IllegalAccessException(msg);
}
if (!globalRoleSettings.getRole().equals(XacmlAdminAuthorization.Role.ROLE_SUPERADMIN.toString())) {
String msg = "NOT FOUND db data for " + XacmlAdminAuthorization.Role.ROLE_SUPERADMIN.toString();
if (LOGGER.isErrorEnabled())
LOGGER.error(msg);
throw new IllegalAccessException(msg);
}
return globalRoleSettings.isLockdown();
}
}
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