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/*-
* ============LICENSE_START=======================================================
* ECOMP Policy Engine
* ================================================================================
* 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.brmsInterface;
import java.util.ArrayList;
import java.util.Collection;
import org.openecomp.policy.api.ConfigRequestParameters;
import org.openecomp.policy.api.LoadedPolicy;
import org.openecomp.policy.api.NotificationType;
import org.openecomp.policy.api.PDPNotification;
import org.openecomp.policy.api.PolicyConfig;
import org.openecomp.policy.api.PolicyConfigStatus;
import org.openecomp.policy.api.PolicyEngine;
import org.openecomp.policy.api.PolicyException;
import org.openecomp.policy.api.RemovedPolicy;
import org.openecomp.policy.common.logging.flexlogger.FlexLogger;
import org.openecomp.policy.common.logging.flexlogger.Logger;
import org.openecomp.policy.utils.BackUpHandler;
import org.openecomp.policy.xacml.api.XACMLErrorConstants;
/**
* BRMSHandler: Notification Handler which listens for PDP Notifications.
* Take action only for BRMS policies.
*
* @version 0.3
*/
public class BRMSHandler implements BackUpHandler{
private static final Logger logger = FlexLogger.getLogger(BRMSHandler.class.getName());
private BRMSPush bRMSPush = null;
public BRMSHandler(String propertiesFile) throws PolicyException{
setBRMSPush(new BRMSPush(propertiesFile, this));
}
public void setBRMSPush(BRMSPush brmsPush) {
this.bRMSPush = brmsPush;
}
/*
* This Method is executed upon notification by the Policy Engine API Notification.
* (non-Javadoc)
* @see org.openecomp.policy.utils.BackUpHandler#notificationReceived(org.openecomp.policy.api.PDPNotification)
*/
@Override
public void notificationReceived(PDPNotification notification) {
logger.info("Notification Recieved");
logger.info(notification.getNotificationType().toString());
Boolean flag = BRMSPush.getBackUpMonitor().getFlag();
bRMSPush.initiate(flag);
if(flag){
logger.info("Master Application performing on Notification ");
runOnNotification(notification);
}else{
logger.info("Slave application Skipping Notification.. ");
}
}
/*
* Executed when a policy is removed from PDP.
*/
private void removedPolicies(Collection<RemovedPolicy> removedPolicies){
Boolean removed = false;
logger.info("Removed Policies");
for(RemovedPolicy removedPolicy: removedPolicies){
logger.info(removedPolicy.getPolicyName());
logger.info(removedPolicy.getVersionNo());
if(removedPolicy.getPolicyName().contains("_BRMS_")){
try{
logger.info("Policy Removed with this policy Name : " + removedPolicy.getPolicyName());
bRMSPush.removeRule(removedPolicy.getPolicyName());
removed = true;
}catch(Exception e){
logger.error(XACMLErrorConstants.ERROR_PROCESS_FLOW+"Rertriving policy failed " + e.getMessage());
}
}
}
Boolean failureFlag = false;
int i = 0;
do{
failureFlag = false;
if(removed){
try{
bRMSPush.pushRules();
}catch(PolicyException e){
//Upon Notification failure
failureFlag = true;
bRMSPush.rotateURLs();
}
}
i++;
}while(failureFlag && i< bRMSPush.URLListSize());
}
/*
* This method is executed if BRMSGW is "MASTER"
* (non-Javadoc)
* @see org.openecomp.policy.utils.BackUpHandler#runOnNotification(org.openecomp.policy.api.PDPNotification)
*/
public void runOnNotification(PDPNotification notification){
if(notification.getNotificationType().equals(NotificationType.REMOVE)){
removedPolicies(notification.getRemovedPolicies());
}else if(notification.getNotificationType().equals(NotificationType.UPDATE)|| notification.getNotificationType().equals(NotificationType.BOTH)){
logger.info("Updated Policies: \n");
ArrayList<PolicyConfig> brmsPolicies = addedPolicies(notification);
Boolean successFlag = false;
for(int i=0; !successFlag && i< bRMSPush.URLListSize(); i++){
if(i!=0){
for(PolicyConfig policyConfig: brmsPolicies){
logger.info("Policy Retry with this Name notified: " + policyConfig.getPolicyName());
bRMSPush.addRule(policyConfig.getPolicyName(),policyConfig.toOther(),policyConfig.getResponseAttributes());
}
}
try{
bRMSPush.pushRules();
successFlag = true;
}catch(PolicyException e){
//Upon Notification failure
successFlag = false;
bRMSPush.rotateURLs();
}
}
}
}
/*
* Executed when a policy is added to PDP.
*/
private ArrayList<PolicyConfig> addedPolicies(PDPNotification notification) {
ArrayList<PolicyConfig> result = new ArrayList<>();
for(LoadedPolicy updatedPolicy: notification.getLoadedPolicies()){
logger.info("policyName : " + updatedPolicy.getPolicyName());
logger.info("policyVersion :" + updatedPolicy.getVersionNo());
logger.info("Matches: " + updatedPolicy.getMatches());
// Checking the Name is correct or not.
if(updatedPolicy.getPolicyName().contains("_BRMS_")){
try{
PolicyEngine policyEngine = getPolicyEngine();
if(policyEngine!=null){
ConfigRequestParameters configRequestParameters = new ConfigRequestParameters();
configRequestParameters.setPolicyName(updatedPolicy.getPolicyName());
Collection<PolicyConfig> policyConfigs = policyEngine.getConfig(configRequestParameters);
for(PolicyConfig policyConfig: policyConfigs){
if(policyConfig.getPolicyConfigStatus().equals(PolicyConfigStatus.CONFIG_RETRIEVED)){
logger.info("Policy Retrieved with this Name notified: " + policyConfig.getPolicyName());
result.add(policyConfig);
bRMSPush.addRule(policyConfig.getPolicyName(),policyConfig.toOther(),policyConfig.getResponseAttributes());
}else{
logger.error(XACMLErrorConstants.ERROR_SYSTEM_ERROR +"Fail to retrieve policy so rule will not be pushed to PolicyRepo !!!!\n\n");
}
}
}
}catch(Exception e){
logger.error(XACMLErrorConstants.ERROR_PROCESS_FLOW+"Rertriving policy failed " + e.getMessage());
}
}
}
return result;
}
public PolicyEngine getPolicyEngine() {
return BRMSGateway.getPolicyEngine();
}
}
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