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/*-
* ============LICENSE_START=======================================================
* ECOMP-PAP-REST
* ================================================================================
* 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.openecomp.policy.pap.xacml.rest.util;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Query;
import javax.servlet.ServletException;
import org.openecomp.policy.rest.XacmlAdminAuthorization;
import org.openecomp.policy.rest.jpa.Attribute;
import org.openecomp.policy.rest.jpa.Datatype;
import org.openecomp.policy.rest.jpa.FunctionDefinition;
import org.openecomp.policy.rest.jpa.GlobalRoleSettings;
import oasis.names.tc.xacml._3_0.core.schema.wd_17.AttributeDesignatorType;
import oasis.names.tc.xacml._3_0.core.schema.wd_17.AttributeSelectorType;
import org.openecomp.policy.common.logging.flexlogger.FlexLogger;
import org.openecomp.policy.common.logging.flexlogger.Logger;
public class JPAUtils {
private static Logger logger = FlexLogger.getLogger(JPAUtils.class);
private EntityManagerFactory emf;
private static final Object mapAccess = new Object();
private static Map<Datatype, List<FunctionDefinition>> mapDatatype2Function = null;
private static Map<String, FunctionDefinition> mapID2Function = null;
private static JPAUtils currentInstance = null;
//private static List<LockdownListener> lockdownListeners = new ArrayList<LockdownListener>();
/**
* 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) throws Exception{
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");
this.emf = emf;
}
/**
* Gets the current instance of JPAUtils.
* @return The instance of JPAUtils or throws exception if the given instance is null.
* @throws IllegalStateException if a JPAUtils instance is null. Call getJPAUtilsInstance(EntityManagerFactory emf) to get this.
*/
public static JPAUtils getJPAUtilsInstance() throws Exception{
logger.debug("getJPAUtilsInstance() as getJPAUtilsInstance() called");
if(currentInstance != null){
return currentInstance;
}
throw new IllegalStateException("The JPAUtils.currentInstance is Null. Use getJPAUtilsInstance(EntityManagerFactory emf)");
}
public static AttributeDesignatorType createDesignator(Attribute attribute) {
AttributeDesignatorType designator = new AttributeDesignatorType();
designator.setAttributeId(attribute.getXacmlId());
if (attribute.getCategoryBean() != null) {
designator.setCategory(attribute.getCategoryBean().getXacmlId());
} else {
logger.warn("No category bean");
}
if (attribute.getDatatypeBean() != null) {
designator.setDataType(attribute.getDatatypeBean().getXacmlId());
} else {
logger.warn("No datatype bean");
}
designator.setIssuer(attribute.getIssuer());
designator.setMustBePresent(attribute.isMustBePresent());
return designator;
}
public static AttributeSelectorType createSelector(Attribute attribute) {
AttributeSelectorType selector = new AttributeSelectorType();
selector.setContextSelectorId(attribute.getXacmlId());
selector.setPath(attribute.getSelectorPath());
if (attribute.getCategoryBean() != null) {
selector.setCategory(attribute.getCategoryBean().getXacmlId());
} else {
logger.warn("No category bean");
}
if (attribute.getDatatypeBean() != null) {
selector.setDataType(attribute.getDatatypeBean().getXacmlId());
} else {
logger.warn("No datatype bean");
}
selector.setMustBePresent(attribute.isMustBePresent());
return selector;
}
/**
* Builds a map in memory of a functions return datatype to function definition. Useful in limiting the number
* of SQL calls to DB especially when we don't expect these to change much.
*
* @return - A HashMap of Datatype JPA Container ID's to FunctionDefinition objects
*/
public Map<Datatype, List<FunctionDefinition>> getFunctionDatatypeMap() {
synchronized(mapAccess) {
if (mapDatatype2Function == null||mapDatatype2Function.isEmpty()) {
try {
buildFunctionMaps();
} catch (ServletException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
return mapDatatype2Function;
}
public Map<String, FunctionDefinition> getFunctionIDMap() {
synchronized(mapAccess) {
if (mapID2Function == null||mapID2Function.equals("{}")) {
try {
buildFunctionMaps();
} catch (ServletException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
return mapID2Function;
}
private void buildFunctionMaps() throws ServletException {
mapDatatype2Function = new HashMap<Datatype, List<FunctionDefinition>>();
mapID2Function = new HashMap<String, FunctionDefinition>();
EntityManager em = emf.createEntityManager();
Query getFunctionDefinitions = em.createNamedQuery("FunctionDefinition.findAll");
List<?> functionList = getFunctionDefinitions.getResultList();
for (Object id : functionList) {
FunctionDefinition value = (FunctionDefinition)id;
mapID2Function.put(value.getXacmlid(), value);
if (mapDatatype2Function.containsKey(value.getDatatypeBean()) == false) {
mapDatatype2Function.put(value.getDatatypeBean(), new ArrayList<FunctionDefinition>());
}
mapDatatype2Function.get(value.getDatatypeBean()).add(value);
}
em.close();
}
/**
* 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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