[POLICY-73] replace openecomp for policy-engine

Change-Id: I54072f6bcd388c0e05562614ee89b4ae7ad67004
Signed-off-by: Guo Ruijing <ruijing.guo@intel.com>
Signed-off-by: Pamela Dragosh <pdragosh@research.att.com>

1 files changed, 0 insertions, 422 deletions

diff --git a/PolicyEngineUtils/src/main/java/org/openecomp/policy/utils/BackUpMonitor.java b/PolicyEngineUtils/src/main/java/org/openecomp/policy/utils/BackUpMonitor.java
deleted file mode 100644
index 6f9082bc9..000000000
--- a/PolicyEngineUtils/src/main/java/org/openecomp/policy/utils/BackUpMonitor.java
+++ /dev/null
@@ -1,422 +0,0 @@
-/*-
- * ============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.utils;
-
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Date;
-import java.util.List;
-import java.util.Properties;
-import java.util.concurrent.TimeUnit;
-
-import javax.persistence.EntityManager;
-import javax.persistence.EntityManagerFactory;
-import javax.persistence.EntityTransaction;
-import javax.persistence.Persistence;
-import javax.persistence.Query;
-
-import org.apache.log4j.Logger;
-import org.eclipse.persistence.config.PersistenceUnitProperties;
-import org.openecomp.policy.api.PDPNotification;
-import org.openecomp.policy.jpa.BackUpMonitorEntity;
-import org.openecomp.policy.std.NotificationStore;
-import org.openecomp.policy.std.StdPDPNotification;
-
-import com.fasterxml.jackson.databind.JsonNode;
-import com.github.fge.jackson.JsonLoader;
-import com.github.fge.jsonpatch.JsonPatch;
-import com.github.fge.jsonpatch.JsonPatchException;
-import com.github.fge.jsonpatch.diff.JsonDiff;
-
-/**
- * BackUp Monitor checks Backup Status with the Database and maintains Redundancy for Gateway Applications. 
- * 
- */
-public class BackUpMonitor {
-	private static final Logger LOGGER = Logger.getLogger(BackUpMonitor.class.getName());
-	private static final int DEFAULT_PING = 15000; // Value is in milliseconds. 
-
-	private static BackUpMonitor instance = null;
-	private static String resourceName = null;
-	private static String resourceNodeName = null;
-	private static String notificationRecord = null;
-	private static String lastMasterNotification= null;
-	private static int pingInterval = DEFAULT_PING;
-	private static Boolean masterFlag = false;
-	private static Object lock = new Object();
-	private static Object notificationLock = new Object();
-	private static BackUpHandler handler= null;
-	private EntityManager em;
-	private EntityManagerFactory emf;
-
-	/*
-	 * Enumeration for the Resource Node Naming. Add here if required. 
-	 */
-	public enum ResourceNode{
-		BRMS,
-		ASTRA
-	}
-
-	private BackUpMonitor(String resourceNodeName, String resourceName, Properties properties, BackUpHandler handler) throws Exception{
-		if(instance == null){
-			instance = this;
-		}
-		BackUpMonitor.resourceNodeName = resourceNodeName;
-		BackUpMonitor.resourceName = resourceName;
-		BackUpMonitor.handler = handler; 
-		// Create Persistence Entity
-		properties.setProperty(PersistenceUnitProperties.ECLIPSELINK_PERSISTENCE_XML, "META-INF/persistencePU.xml");
-		emf = Persistence.createEntityManagerFactory("PolicyEngineUtils", properties);
-		if(emf==null){
-			LOGGER.error("Unable to create Entity Manger Factory ");
-			throw new Exception("Unable to create Entity Manger Factory");
-		}
-		em = emf.createEntityManager();
-
-		// Check Database if this is Master or Slave.
-		checkDataBase();
-
-		// Start thread.
-		Thread t = new Thread(new BMonitor());
-		t.start();
-	}
-
-	/**
-	 * Gets the BackUpMonitor Instance if given proper resourceName and properties. Else returns null. 
-	 * 
-	 * @param resourceNodeName String format of the Resource Node to which the resource Belongs to. 
-	 * @param resourceName String format of the ResourceName. This needs to be Unique. 
-	 * @param properties Properties format of the properties file. 
-	 * @return BackUpMonitor instance. 
-	 */
-	public static synchronized BackUpMonitor getInstance(String resourceNodeName, String resourceName, Properties properties, BackUpHandler handler) throws Exception {
-		if(resourceNodeName==null || resourceNodeName.trim().equals("") ||resourceName==null|| resourceName.trim().equals("") || properties == null || handler==null){
-			LOGGER.error("Error while getting Instance. Please check resourceName and/or properties file");
-			return null;
-		}else if((resourceNodeName.equals(ResourceNode.ASTRA.toString()) || resourceNodeName.equals(ResourceNode.BRMS.toString())) && validate(properties) && instance==null){
-			LOGGER.info("Creating Instance of BackUpMonitor");
-			instance = new BackUpMonitor(resourceNodeName, resourceName, properties, handler);
-		}
-		return instance;
-	}
-
-	// This is to validate given Properties with required values. 
-	private static Boolean validate(Properties properties){
-		if(properties.getProperty("javax.persistence.jdbc.driver")==null ||properties.getProperty("javax.persistence.jdbc.driver").trim().equals("")){
-			LOGGER.error("javax.persistence.jdbc.driver property is empty");
-			return false;
-		}
-		if(properties.getProperty("javax.persistence.jdbc.url")==null || properties.getProperty("javax.persistence.jdbc.url").trim().equals("")){
-			LOGGER.error("javax.persistence.jdbc.url property is empty");
-			return false;
-		}
-		if(properties.getProperty("javax.persistence.jdbc.user")==null || properties.getProperty("javax.persistence.jdbc.user").trim().equals("")){
-			LOGGER.error("javax.persistence.jdbc.user property is empty");
-			return false;
-		}
-		if(properties.getProperty("javax.persistence.jdbc.password")==null || properties.getProperty("javax.persistence.jdbc.password").trim().equals("")){
-			LOGGER.error("javax.persistence.jdbc.password property is empty");
-			return false;
-		}
-		if(properties.getProperty("ping_interval")==null || properties.getProperty("ping_interval").trim().equals("")){
-			LOGGER.info("ping_interval property not specified. Taking default value");
-		}else{
-			try{
-				pingInterval = Integer.parseInt(properties.getProperty("ping_interval").trim());
-			}catch(NumberFormatException e){
-				LOGGER.warn("Ignored invalid proeprty ping_interval. Taking default value: " + pingInterval);
-				pingInterval = DEFAULT_PING;
-			}
-		}
-		return true;
-	}
-
-	// Sets the Flag for masterFlag to either True or False. 
-	private static void setFlag(Boolean flag){
-		synchronized (lock) {
-			masterFlag = flag;
-		}
-	}
-
-	/**
-	 * Gets the Boolean value of Master(True) or Slave mode (False)
-	 * 
-	 * @return Boolean flag which if True means that the operation needs to be performed(Master mode) or if false the operation is in slave mode. 
-	 */
-	public Boolean getFlag(){
-		synchronized (lock) {
-			return masterFlag;
-		}
-	}
-
-	// BackUpMonitor Thread 
-	private class BMonitor implements Runnable{
-		@Override
-		public void run() {
-			LOGGER.info("Starting BackUpMonitor Thread.. ");
-			while(true){
-				try {
-					TimeUnit.MILLISECONDS.sleep(pingInterval);
-					checkDataBase();
-				} catch (Exception e) {
-					LOGGER.error("Error during Thread execution " + e.getMessage());
-				}
-			}
-		}
-	}
-
-	// Set Master 
-	private static BackUpMonitorEntity setMaster(BackUpMonitorEntity bMEntity){
-		bMEntity.setFlag("MASTER");
-		setFlag(true);
-		return bMEntity;
-	}
-
-	// Set Slave 
-	private static BackUpMonitorEntity setSlave(BackUpMonitorEntity bMEntity){
-		bMEntity.setFlag("SLAVE");
-		setFlag(false);
-		return bMEntity;
-	}
-
-	// Check Database and set the Flag. 
-	private void checkDataBase() throws Exception {
-		EntityTransaction et = em.getTransaction();
-		notificationRecord = PolicyUtils.objectToJsonString(NotificationStore.getNotificationRecord());
-		// Clear Cache. 
-		LOGGER.info("Clearing Cache");
-		em.getEntityManagerFactory().getCache().evictAll();
-		try{
-			LOGGER.info("Checking Datatbase for BackUpMonitor.. ");
-			et.begin();
-			Query query = em.createQuery("select b from BackUpMonitorEntity b where b.resourceNodeName = :nn");
-			if(resourceNodeName.equals(ResourceNode.ASTRA.toString())){
-				query.setParameter("nn", ResourceNode.ASTRA.toString());
-			}else if(resourceNodeName.equals(ResourceNode.BRMS.toString())){
-				query.setParameter("nn", ResourceNode.BRMS.toString());
-			}
-			List<?> bMList = query.getResultList();
-			if(bMList.isEmpty()){
-				// This is New. create an entry as Master. 
-				LOGGER.info("Adding resource " + resourceName + " to Database");
-				BackUpMonitorEntity bMEntity = new BackUpMonitorEntity();
-				bMEntity.setResoruceNodeName(resourceNodeName);
-				bMEntity.setResourceName(resourceName);
-				bMEntity = setMaster(bMEntity);
-				bMEntity.setTimeStamp(new Date());
-				em.persist(bMEntity);
-				em.flush();
-			}else{
-				// Check for other Master(s)
-				ArrayList<BackUpMonitorEntity> masterEntities = new ArrayList<>();
-				// Check for self. 
-				BackUpMonitorEntity selfEntity = null;
-				// Check backup monitor entities.
-				for(int i=0; i< bMList.size(); i++){
-					BackUpMonitorEntity bMEntity = (BackUpMonitorEntity) bMList.get(i);
-					LOGGER.info("Refreshing Entity. ");
-					em.refresh(bMEntity);
-					if(bMEntity.getFlag().equalsIgnoreCase("MASTER")){
-						masterEntities.add(bMEntity);
-					}
-					if(bMEntity.getResourceName().equals(resourceName)){
-						selfEntity = bMEntity;
-					}
-				}
-				if(selfEntity!=null){
-					LOGGER.info("Resource Name already Exists: " + resourceName);
-					if(selfEntity.getFlag().equalsIgnoreCase("MASTER")){
-						// Already Master Mode. 
-						setFlag(true);
-						LOGGER.info(resourceName + " is on Master Mode");
-						selfEntity.setTimeStamp(new Date());
-						selfEntity.setNotificationRecord(notificationRecord);
-						em.persist(selfEntity);
-						em.flush();
-						setLastNotification(null);
-						if(!masterEntities.contains(selfEntity)){
-							masterEntities.add(selfEntity);
-						}
-					}else{
-						// Already Slave Mode.
-						setFlag(false);
-						selfEntity.setTimeStamp(new Date());
-						selfEntity.setNotificationRecord(notificationRecord);
-						em.persist(selfEntity);
-						em.flush();
-						LOGGER.info(resourceName + " is on Slave Mode");
-					}
-				}else{
-					// Resource name is null -> No resource with same name. 
-					selfEntity = new BackUpMonitorEntity();
-					selfEntity.setResoruceNodeName(resourceNodeName);
-					selfEntity.setResourceName(resourceName);
-					selfEntity.setTimeStamp(new Date());
-					selfEntity = setSlave(selfEntity);
-					setLastNotification(null);
-					LOGGER.info("Creating: " + resourceName + " on Slave Mode");
-					em.persist(selfEntity);
-					em.flush();
-				}
-				// Correct the database if any errors and perform monitor checks.
-				if(masterEntities.size()!=1 || !getFlag()){
-					// We are either not master or there are more masters or no masters. 
-					if(masterEntities.size()==0){
-						// No Masters is a problem Convert ourselves to Master. 
-						selfEntity = setMaster(selfEntity);
-						selfEntity.setTimeStamp(new Date());
-						selfEntity.setNotificationRecord(notificationRecord);
-						LOGGER.info(resourceName + " changed to Master Mode - No Masters available.");
-						em.persist(selfEntity);
-						em.flush();
-					}else {
-						if(masterEntities.size()>1){
-							// More Masters is a problem, Fix the issue by looking for the latest one and make others Slave. 
-							BackUpMonitorEntity masterEntity = null;
-							for(BackUpMonitorEntity currentEntity: masterEntities){
-								if(currentEntity.getFlag().equalsIgnoreCase("MASTER")){
-									if(masterEntity==null){
-										masterEntity = currentEntity;
-									}else if(currentEntity.getTimeStamp().getTime() > masterEntity.getTimeStamp().getTime()){
-										// False Master, Update master to slave and take currentMaster as Master. 
-										masterEntity.setFlag("SLAVE");
-										masterEntity.setTimeStamp(new Date());
-										em.persist(masterEntity);
-										em.flush();
-										masterEntity = currentEntity;
-									}else{
-										currentEntity.setFlag("SLAVE");
-										currentEntity.setTimeStamp(new Date());
-										em.persist(currentEntity);
-										em.flush();
-									}
-								}
-							}
-							masterEntities = new ArrayList<>();
-							masterEntities.add(masterEntity);
-						}
-						if(masterEntities.size()==1){
-							// Correct Size, Check if Master is Latest, if not Change Master to Slave and Slave to Master.   
-							BackUpMonitorEntity masterEntity = masterEntities.get(0);
-							if(!masterEntity.getResourceName().equals(selfEntity.getResourceName())){
-								Date currentTime = new Date();
-								long timeDiff = 0;
-								timeDiff = currentTime.getTime()-masterEntity.getTimeStamp().getTime();
-								if(timeDiff > (pingInterval+1500)){
-									// This is down or has an issue and we need to become Master while turning the Master to slave.
-									masterEntity.setFlag("SLAVE");
-									String lastNotification = null;
-									if(masterEntity.getNotificationRecord()!=null){
-										lastNotification = calculatePatch(masterEntity.getNotificationRecord());
-									}
-									setLastNotification(lastNotification);
-									em.persist(masterEntity);
-									em.flush();
-									// Lets Become Master. 
-									selfEntity = setMaster(selfEntity);
-									LOGGER.info("Changing "+ resourceName + " from slave to Master Mode");
-									selfEntity.setTimeStamp(new Date());
-									selfEntity.setNotificationRecord(notificationRecord);
-									em.persist(selfEntity);
-									em.flush();
-								}
-							}
-						}else{
-							LOGGER.error("Backup Monitor Issue, Masters out of sync, This will be fixed in next interval.");
-						}
-					}
-				}
-			}
-			et.commit();
-		}catch(Exception e){
-			LOGGER.error("failed Database Operation " + e.getMessage());
-			if(et.isActive()){
-				et.rollback();
-			}
-			throw new Exception(e);
-		}
-	}
-
-	// Calculate Patch and return String JsonPatch of the notification Delta. 
-	private synchronized String calculatePatch(String oldNotificationRecord) {
-		try{
-			JsonNode notification = JsonLoader.fromString(notificationRecord);
-			JsonNode oldNotification = JsonLoader.fromString(oldNotificationRecord);
-			JsonNode patchNode = JsonDiff.asJson(oldNotification, notification);
-			LOGGER.info("Generated JSON Patch is " + patchNode.toString());
-			JsonPatch patch = JsonPatch.fromJson(patchNode);
-			try {
-				JsonNode patched = patch.apply(oldNotification);
-				LOGGER.info("Generated New Notification is : " + patched.toString());
-				return patched.toString();
-			} catch (JsonPatchException e) {
-				LOGGER.error("Error generating Patched "  +e.getMessage());
-				return null;
-			}
-		}catch(IOException e){
-			LOGGER.error("Error generating Patched "  +e.getMessage());
-			return null;
-		}
-	}
-
-	/**
-	 * Updates Notification in the Database while Performing the health check. 
-	 * 
-	 * @param notification String format of notification record to store in the Database. 
-	 * @throws Exception 
-	 */
-	public synchronized void updateNotification() throws Exception{
-		checkDataBase();
-	}
-
-	// Take in string notification and send the record delta to Handler. 
-	private static void callHandler(String notification){
-		if(handler!=null){
-			try {
-				PDPNotification notificationObject = PolicyUtils.jsonStringToObject(notification, StdPDPNotification.class);
-				if(notificationObject.getNotificationType()!=null){
-					LOGGER.info("Performing Patched notification ");
-					try{
-						handler.runOnNotification(notificationObject);
-						notificationRecord = lastMasterNotification;
-					}catch (Exception e){
-						LOGGER.error("Error in Clients Handler Object : " + e.getMessage());
-					}
-				}
-			} catch (IOException e) {
-				LOGGER.info("Error while notification Conversion " + e.getMessage());
-			}
-		}
-	}
-
-	// Used to set LastMasterNotification Record. 
-	private static void setLastNotification(String notification){
-		synchronized(notificationLock){
-			lastMasterNotification = notification;
-			if(lastMasterNotification!=null && !lastMasterNotification.equals("\"notificationType\":null")){
-				if(lastMasterNotification.equals(notificationRecord)){
-					return;
-				}
-				callHandler(notification);
-			}
-		}
-	}
-}