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/*-
* ============LICENSE_START=======================================================
* PolicyEngineUtils
* ================================================================================
* 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.std;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import org.openecomp.policy.api.LoadedPolicy;
import org.openecomp.policy.api.NotificationType;
import org.openecomp.policy.api.PDPNotification;
import org.openecomp.policy.api.RemovedPolicy;
/*
* This Should Compare and save the Notifications from the beginning of Time.
* If there is something new (missed) We notify the client.
* Works for PDP failures.
*
*/
public class NotificationStore {
private static StdPDPNotification notificationRecord = new StdPDPNotification();
public static StdPDPNotification getDeltaNotification(StdPDPNotification newNotification){
StdPDPNotification notificationDelta = new StdPDPNotification();
ArrayList<StdRemovedPolicy> removedDelta = new ArrayList<StdRemovedPolicy>();
ArrayList<StdLoadedPolicy> updatedDelta = new ArrayList<StdLoadedPolicy>();
Collection<StdLoadedPolicy> newUpdatedPolicies = new ArrayList<StdLoadedPolicy>();
Collection<StdRemovedPolicy> newRemovedPolicies = new ArrayList<StdRemovedPolicy>();
Collection<LoadedPolicy> oldUpdatedLostPolicies = notificationRecord.getLoadedPolicies();
Collection<RemovedPolicy> oldRemovedPolicies = notificationRecord.getRemovedPolicies();
Collection<LoadedPolicy> oldUpdatedPolicies = notificationRecord.getLoadedPolicies();
Boolean update = false;
Boolean remove = false;
// if the NotificationRecord is empty
if(notificationRecord.getRemovedPolicies()==null || notificationRecord.getLoadedPolicies()==null){
if(newNotification!=null){
notificationRecord = newNotification;
}
return notificationDelta;
}
// do the Delta operation.
if(newNotification!=null){
// check for old removed policies.
if(!newNotification.getRemovedPolicies().isEmpty()){
for(RemovedPolicy newRemovedPolicy: newNotification.getRemovedPolicies()){
//Look for policy Not in Remove
Boolean removed = true;
for(RemovedPolicy oldRemovedPolicy: notificationRecord.getRemovedPolicies()){
if(newRemovedPolicy.getPolicyName().equals(oldRemovedPolicy.getPolicyName())){
if(newRemovedPolicy.getVersionNo().equals(oldRemovedPolicy.getVersionNo())){
removed = false;
// Don't want a duplicate.
oldRemovedPolicies.remove(oldRemovedPolicy);
}
}
}
//We need to change our record we have an Update record of this remove.
for(LoadedPolicy oldUpdatedPolicy: notificationRecord.getLoadedPolicies()){
if(newRemovedPolicy.getPolicyName().equals(oldUpdatedPolicy.getPolicyName())){
if(newRemovedPolicy.getVersionNo().equals(oldUpdatedPolicy.getVersionNo())){
oldUpdatedPolicies.remove(oldUpdatedPolicy);
oldUpdatedLostPolicies.remove(oldUpdatedPolicy);
}
}
}
if(removed){
remove = true;
notificationRecord.getRemovedPolicies().add(newRemovedPolicy);
removedDelta.add((StdRemovedPolicy)newRemovedPolicy);
}
// This will be converted to New Later.
oldRemovedPolicies.add(newRemovedPolicy);
}
}
// Check for old Updated Policies.
if(!newNotification.getLoadedPolicies().isEmpty()){
for(LoadedPolicy newUpdatedPolicy: newNotification.getLoadedPolicies()){
// Look for policies which are not in Update
Boolean updated = true;
for(LoadedPolicy oldUpdatedPolicy: notificationRecord.getLoadedPolicies()){
if(newUpdatedPolicy.getPolicyName().equals(oldUpdatedPolicy.getPolicyName())){
if(newUpdatedPolicy.getVersionNo().equals(oldUpdatedPolicy.getVersionNo())){
updated = false;
// Remove the policy from copy.
oldUpdatedLostPolicies.remove(oldUpdatedPolicy);
// Eliminating Duplicate.
oldUpdatedPolicies.remove(oldUpdatedPolicy);
}
}
}
// Change the record if the policy has been Removed earlier.
for(RemovedPolicy oldRemovedPolicy: notificationRecord.getRemovedPolicies()){
if(oldRemovedPolicy.getPolicyName().equals(newUpdatedPolicy.getPolicyName())){
if(oldRemovedPolicy.getVersionNo().equals(newUpdatedPolicy.getVersionNo())){
oldRemovedPolicies.remove(oldRemovedPolicy);
}
}
}
if(updated){
update = true;
updatedDelta.add((StdLoadedPolicy)newUpdatedPolicy);
}
// This will be converted to new Later
oldUpdatedPolicies.add(newUpdatedPolicy);
}
// Conversion of Update to Remove if that occurred.
if(!oldUpdatedLostPolicies.isEmpty()){
for(LoadedPolicy updatedPolicy: oldUpdatedLostPolicies){
StdRemovedPolicy removedPolicy = new StdRemovedPolicy();
removedPolicy.setPolicyName(updatedPolicy.getPolicyName());
removedPolicy.setVersionNo(updatedPolicy.getVersionNo());
removedDelta.add(removedPolicy);
remove = true;
}
}
}
// Update our Record.
if(!oldUpdatedPolicies.isEmpty()){
for(LoadedPolicy updatedPolicy: oldUpdatedPolicies){
newUpdatedPolicies.add((StdLoadedPolicy)updatedPolicy);
}
}
if(!oldRemovedPolicies.isEmpty()){
for(RemovedPolicy removedPolicy: oldRemovedPolicies){
newRemovedPolicies.add((StdRemovedPolicy)removedPolicy);
}
}
notificationRecord.setRemovedPolicies(newRemovedPolicies);
notificationRecord.setLoadedPolicies(newUpdatedPolicies);
// Update the notification Result.
notificationDelta.setRemovedPolicies(removedDelta);
notificationDelta.setLoadedPolicies(updatedDelta);
if(remove&&update){
notificationDelta.setNotificationType(NotificationType.BOTH);
}else if(remove){
notificationDelta.setNotificationType(NotificationType.REMOVE);
}else if(update){
notificationDelta.setNotificationType(NotificationType.UPDATE);
}
}
return notificationDelta;
}
public static void recordNotification(StdPDPNotification notification){
if(notification!=null){
if(notificationRecord.getRemovedPolicies()==null || notificationRecord.getLoadedPolicies()==null){
notificationRecord = notification;
}else{
// Check if there is anything new and update the record.
if(notificationRecord.getLoadedPolicies()!=null || notificationRecord.getRemovedPolicies()!=null){
HashSet<StdRemovedPolicy> removedPolicies = new HashSet<StdRemovedPolicy>();
for(RemovedPolicy rPolicy: notificationRecord.getRemovedPolicies()){
StdRemovedPolicy sRPolicy = new StdRemovedPolicy();
sRPolicy.setPolicyName(rPolicy.getPolicyName());
sRPolicy.setVersionNo(rPolicy.getVersionNo());
removedPolicies.add(sRPolicy);
}
HashSet<StdLoadedPolicy> updatedPolicies = new HashSet<StdLoadedPolicy>();
for(LoadedPolicy uPolicy: notificationRecord.getLoadedPolicies()){
StdLoadedPolicy sUPolicy = new StdLoadedPolicy();
sUPolicy.setMatches(uPolicy.getMatches());
sUPolicy.setPolicyName(uPolicy.getPolicyName());
sUPolicy.setVersionNo(uPolicy.getVersionNo());
updatedPolicies.add(sUPolicy);
}
// Checking with the new updated policies.
if(notification.getLoadedPolicies()!=null && !notification.getLoadedPolicies().isEmpty()){
for(LoadedPolicy newUpdatedPolicy: notification.getLoadedPolicies()){
// If it was removed earlier then we need to remove from our record
Iterator<StdRemovedPolicy> oldRemovedPolicy = removedPolicies.iterator();
while(oldRemovedPolicy.hasNext()){
RemovedPolicy policy = oldRemovedPolicy.next();
if(newUpdatedPolicy.getPolicyName().equals(policy.getPolicyName())) {
if(newUpdatedPolicy.getVersionNo().equals(policy.getVersionNo())) {
oldRemovedPolicy.remove();
}
}
}
// If it was previously updated need to Overwrite it to the record.
Iterator<StdLoadedPolicy> oldUpdatedPolicy = updatedPolicies.iterator();
while(oldUpdatedPolicy.hasNext()){
LoadedPolicy policy = oldUpdatedPolicy.next();
if(newUpdatedPolicy.getPolicyName().equals(policy.getPolicyName())) {
if(newUpdatedPolicy.getVersionNo().equals(policy.getVersionNo())) {
oldUpdatedPolicy.remove();
}
}
}
StdLoadedPolicy sUPolicy = new StdLoadedPolicy();
sUPolicy.setMatches(newUpdatedPolicy.getMatches());
sUPolicy.setPolicyName(newUpdatedPolicy.getPolicyName());
sUPolicy.setVersionNo(newUpdatedPolicy.getVersionNo());
updatedPolicies.add(sUPolicy);
}
}
// Checking with New Removed Policies.
if(notification.getRemovedPolicies()!=null && !notification.getRemovedPolicies().isEmpty()){
for(RemovedPolicy newRemovedPolicy : notification.getRemovedPolicies()){
// If it was previously removed Overwrite it to the record.
Iterator<StdRemovedPolicy> oldRemovedPolicy = removedPolicies.iterator();
while(oldRemovedPolicy.hasNext()){
RemovedPolicy policy = oldRemovedPolicy.next();
if(newRemovedPolicy.getPolicyName().equals(policy.getPolicyName())) {
if(newRemovedPolicy.getVersionNo().equals(policy.getVersionNo())) {
oldRemovedPolicy.remove();
}
}
}
// If it was added earlier then we need to remove from our record.
Iterator<StdLoadedPolicy> oldUpdatedPolicy = updatedPolicies.iterator();
while(oldUpdatedPolicy.hasNext()){
LoadedPolicy policy = oldUpdatedPolicy.next();
if(newRemovedPolicy.getPolicyName().equals(policy.getPolicyName())) {
if(newRemovedPolicy.getVersionNo().equals(policy.getVersionNo())) {
oldUpdatedPolicy.remove();
}
}
}
StdRemovedPolicy sRPolicy = new StdRemovedPolicy();
sRPolicy.setPolicyName(newRemovedPolicy.getPolicyName());
sRPolicy.setVersionNo(newRemovedPolicy.getVersionNo());
removedPolicies.add(sRPolicy);
}
}
notificationRecord.setRemovedPolicies(removedPolicies);
notificationRecord.setLoadedPolicies(updatedPolicies);
}
if(!notificationRecord.getLoadedPolicies().isEmpty() && !notificationRecord.getRemovedPolicies().isEmpty()){
notificationRecord.setNotificationType(NotificationType.BOTH);
}else if(!notificationRecord.getLoadedPolicies().isEmpty()){
notificationRecord.setNotificationType(NotificationType.UPDATE);
}else if(!notificationRecord.getRemovedPolicies().isEmpty()){
notificationRecord.setNotificationType(NotificationType.REMOVE);
}
}
}
}
// This should return the current Notification Record.
public static PDPNotification getNotificationRecord(){
return notificationRecord;
}
}
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