ONAP-PAP-REST/src/main/java/org/onap/policy/pap/xacml/rest/handler/DeleteHandler.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ONAP-PAP-REST
   4  * ================================================================================
   5  * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
   6  * ================================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ============LICENSE_END=========================================================
  19  */
  20 package org.onap.policy.pap.xacml.rest.handler;
  21
  22 import java.io.File;
  23 import java.io.IOException;
  24 import java.sql.Connection;
  25 import java.sql.DriverManager;
  26 import java.sql.ResultSet;
  27 import java.sql.SQLException;
  28 import java.sql.Statement;
  29 import java.util.List;
  30
  31 import javax.persistence.EntityManager;
  32 import javax.persistence.Query;
  33 import javax.servlet.http.HttpServletRequest;
  34 import javax.servlet.http.HttpServletResponse;
  35
  36 import org.onap.policy.common.logging.ONAPLoggingContext;
  37 import org.onap.policy.common.logging.eelf.MessageCodes;
  38 import org.onap.policy.common.logging.eelf.PolicyLogger;
  39 import org.onap.policy.common.logging.flexlogger.FlexLogger;
  40 import org.onap.policy.common.logging.flexlogger.Logger;
  41 import org.onap.policy.pap.xacml.rest.XACMLPapServlet;
  42 import org.onap.policy.pap.xacml.rest.components.PolicyDBDaoTransaction;
  43 import org.onap.policy.pap.xacml.rest.elk.client.PolicyElasticSearchController;
  44 import org.onap.policy.pap.xacml.rest.model.RemoveGroupPolicy;
  45 import org.onap.policy.pap.xacml.rest.util.JPAUtils;
  46 import org.onap.policy.rest.XACMLRestProperties;
  47 import org.onap.policy.rest.adapter.PolicyRestAdapter;
  48 import org.onap.policy.rest.jpa.PolicyEntity;
  49 import org.onap.policy.rest.jpa.PolicyVersion;
  50 import org.onap.policy.utils.PolicyUtils;
  51 import org.onap.policy.xacml.api.XACMLErrorConstants;
  52 import org.onap.policy.xacml.api.pap.OnapPDPGroup;
  53 import org.onap.policy.xacml.std.pap.StdPAPPolicy;
  54 import org.onap.policy.xacml.std.pap.StdPDPGroup;
  55
  56 import com.att.research.xacml.api.pap.PAPException;
  57 import com.att.research.xacml.api.pap.PDPPolicy;
  58 import com.att.research.xacml.util.XACMLProperties;
  59
  60 public class DeleteHandler {
  61
  62         private OnapPDPGroup newgroup;
  63         private static Logger logger = FlexLogger.getLogger(DeleteHandler.class);
  64
  65         public void doAPIDeleteFromPAP(HttpServletRequest request, HttpServletResponse response, ONAPLoggingContext loggingContext) throws IOException, SQLException  {
  66                 // get the request content into a String
  67                 String json = null;
  68                 java.util.Scanner scanner = new java.util.Scanner(request.getInputStream());
  69                 scanner.useDelimiter("\\A");
  70                 json =  scanner.hasNext() ? scanner.next() : "";
  71                 scanner.close();
  72                 PolicyLogger.info("JSON request from API: " + json);
  73                 // convert Object sent as JSON into local object
  74                 StdPAPPolicy policy = PolicyUtils.jsonStringToObject(json, StdPAPPolicy.class);
  75                 String policyName = policy.getPolicyName();
  76                 Boolean policyVersionDeleted = false;
  77                 String removeXMLExtension;
  78                 int currentVersion;
  79                 String removeVersionExtension;
  80                 String splitPolicyName = null;
  81                 String[] split = null;
  82                 String status = "error";
  83                 PolicyEntity policyEntity = null;
  84                 JPAUtils jpaUtils = null;
  85
  86                 String papDbDriver = XACMLProperties.getProperty(XACMLRestProperties.PROP_PAP_DB_DRIVER);
  87                 String papDbUrl = XACMLProperties.getProperty(XACMLRestProperties.PROP_PAP_DB_URL);
  88                 String papDbUser = XACMLProperties.getProperty(XACMLRestProperties.PROP_PAP_DB_USER);
  89                 String papDbPassword = XACMLProperties.getProperty(XACMLRestProperties.PROP_PAP_DB_PASSWORD);
  90                 Connection con = null;
  91
  92                 try {
  93                         jpaUtils = JPAUtils.getJPAUtilsInstance(XACMLPapServlet.getEmf());
  94                 } catch (Exception e) {
  95                         PolicyLogger.error(MessageCodes.EXCEPTION_ERROR, e, "XACMLPapServlet", " Could not create JPAUtils instance on the PAP");
  96                         response.addHeader("error", "jpautils");
  97                         response.addHeader("operation", "delete");
  98                         response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
  99                         return;
 100                 }
 101                 if (jpaUtils.dbLockdownIgnoreErrors()) {
 102                         PolicyLogger.warn("Policies are locked down");
 103                         response.addHeader("operation", "delete");
 104                         response.addHeader("lockdown", "true");
 105                         response.setStatus(HttpServletResponse.SC_ACCEPTED);
 106                         return;
 107                 }
 108                 EntityManager em = XACMLPapServlet.getEmf().createEntityManager();
 109                 Query policyEntityQuery = null;
 110                 try{
 111                         if(policyName.endsWith(".xml")){
 112                                 removeXMLExtension = policyName.replace(".xml", "");
 113                                 currentVersion = Integer.parseInt(removeXMLExtension.substring(removeXMLExtension.lastIndexOf(".")+1));
 114                                 removeVersionExtension = removeXMLExtension.substring(0, removeXMLExtension.lastIndexOf("."));
 115                                 boolean queryCheck = true;
 116                                 if(policy.getDeleteCondition().equalsIgnoreCase("All Versions")){
 117                                         if(policyName.contains("Config_")){
 118                                                 splitPolicyName = removeVersionExtension.replace(".Config_", ":Config_");
 119                                         }else if(policyName.contains("Action_")){
 120                                                 splitPolicyName = removeVersionExtension.replace(".Action_", ":Action_");
 121                                         }else if(policyName.contains("Decision_")){
 122                                                 splitPolicyName = removeVersionExtension.replace(".Decision_", ":Decision_");
 123                                         }
 124                                         if(splitPolicyName != null){
 125                                                 split = splitPolicyName.split(":");
 126                                         }else{
 127                                                 PolicyLogger.error(MessageCodes.ERROR_UNKNOWN + "Failed to delete the policy. Please, provide the valid policyname.");
 128                                                 response.addHeader("error", "unknown");
 129                                                 response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR );
 130                                                 return;
 131                                         }
 132                                         policyEntityQuery = em.createQuery("SELECT p FROM PolicyEntity p WHERE p.policyName LIKE :pName and p.scope=:pScope");
 133                                 }else if(policy.getDeleteCondition().equalsIgnoreCase("Current Version")) {
 134                                         if(policyName.contains("Config_")){
 135                                                 splitPolicyName = policyName.replace(".Config_", ":Config_");
 136                                         }else if(policyName.contains("Action_")){
 137                                                 splitPolicyName = policyName.replace(".Action_", ":Action_");
 138                                         }else if(policyName.contains("Decision_")){
 139                                                 splitPolicyName = policyName.replace(".Decision_", ":Decision_");
 140                                         }
 141                                         split = splitPolicyName.split(":");
 142                                         queryCheck = false;
 143                                         policyEntityQuery = em.createQuery("SELECT p FROM PolicyEntity p WHERE p.policyName=:pName and p.scope=:pScope");
 144                                 }
 145
 146                                 if(queryCheck){
 147                                         policyEntityQuery.setParameter("pName", "%"+split[1]+"%");
 148                                 }else{
 149                                         policyEntityQuery.setParameter("pName", split[1]);
 150                                 }
 151
 152                                 policyEntityQuery.setParameter("pScope", split[0]);
 153                                 List<?> peResult = policyEntityQuery.getResultList();
 154                                 if(!peResult.isEmpty()){
 155                                         Query getPolicyVersion = em.createQuery("Select p from PolicyVersion p where p.policyName=:pname");
 156                                         getPolicyVersion.setParameter("pname", removeVersionExtension.replace(".", File.separator));
 157                                         List<?> pvResult = getPolicyVersion.getResultList();
 158                                         PolicyVersion pVersion = (PolicyVersion) pvResult.get(0);
 159                                         int newVersion = 0;
 160                                         em.getTransaction().begin();
 161                                         Class.forName(papDbDriver);
 162                                         con = DriverManager.getConnection(papDbUrl,papDbUser,papDbPassword);
 163
 164                                         if(policy.getDeleteCondition().equalsIgnoreCase("All Versions")){
 165                                                 boolean groupCheck = checkPolicyGroupEntity(em, con, peResult);
 166                                                 if(!groupCheck){
 167                                                         for(Object peData : peResult){
 168                                                                 policyEntity = (PolicyEntity) peData;
 169                                                                 status = deletePolicyEntityData(em, policyEntity);
 170                                                         }
 171                                                 }else{
 172                                                         status = "PolicyInPDP";
 173                                                 }
 174                                                 if(status.equals("error")){
 175                                                         PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE + "Exception Occured while deleting the Entity from Database.");
 176                                                         response.addHeader("error", "unknown");
 177                                                         response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR );
 178                                                         return;
 179                                                 }else if(status.equals("PolicyInPDP")){
 180                                                         PolicyLogger.error(MessageCodes.GENERAL_WARNING + "Policy can't be deleted, it is active in PDP Groups.");
 181                                                         response.addHeader("error", "PolicyInPDP");
 182                                                         response.setStatus(HttpServletResponse.SC_CONFLICT);
 183                                                         return;
 184                                                 }else{
 185                                                         try{
 186                                                                 policyVersionDeleted = true;
 187                                                                 em.remove(pVersion);
 188                                                         }catch(Exception e){
 189                                                                 logger.error(e.getMessage(),e);
 190                                                                 policyVersionDeleted = false;
 191                                                         }
 192                                                 }
 193                                         }else if(policy.getDeleteCondition().equalsIgnoreCase("Current Version")){
 194                                                 boolean groupCheck = checkPolicyGroupEntity(em, con, peResult);
 195                                                 if(!groupCheck){
 196                                                         policyEntity = (PolicyEntity) peResult.get(0);
 197                                                         status = deletePolicyEntityData(em, policyEntity);
 198                                                 }else{
 199                                                         status = "PolicyInPDP";
 200                                                 }
 201
 202                                                 if(status.equals("error")){
 203                                                         PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE + "Exception Occured while deleting the Entity from Database.");
 204                                                         response.addHeader("error", "unknown");
 205                                                         response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR );
 206                                                         return;
 207                                                 }else if(status.equals("PolicyInPDP")){
 208                                                         PolicyLogger.error(MessageCodes.GENERAL_WARNING + "Policy can't be deleted, it is active in PDP Groups.");
 209                                                         response.addHeader("error", "unknown");
 210                                                         response.setStatus(HttpServletResponse.SC_CONFLICT);
 211                                                         return;
 212                                                 }else{
 213                                                         if(currentVersion > 1){
 214                                                                 if(!peResult.isEmpty()){
 215                                                                         for(Object object : peResult){
 216                                                                                 policyEntity = (PolicyEntity) object;
 217                                                                                 String policyEntityName = policyEntity.getPolicyName().replace(".xml", "");
 218                                                                                 int policyEntityVersion = Integer.parseInt(policyEntityName.substring(policyEntityName.lastIndexOf(".")+1));
 219                                                                                 if(policyEntityVersion > newVersion){
 220                                                                                         newVersion = policyEntityVersion-1;
 221                                                                                 }
 222                                                                         }
 223                                                                 }
 224                                                                 pVersion.setActiveVersion(newVersion);
 225                                                                 pVersion.setHigherVersion(newVersion);
 226                                                                 try{
 227                                                                         policyVersionDeleted = true;
 228                                                                         em.persist(pVersion);
 229                                                                 }catch(Exception e){
 230                                                                         logger.error(e.getMessage(),e);
 231                                                                         policyVersionDeleted = false;
 232                                                                 }
 233                                                         }else{
 234                                                                 try{
 235                                                                         policyVersionDeleted = true;
 236                                                                         em.remove(pVersion);
 237                                                                 }catch(Exception e){
 238                                                                         logger.error(e.getMessage(),e);
 239                                                                         policyVersionDeleted = false;
 240                                                                 }
 241                                                         }
 242                                                 }
 243                                         }
 244                                 }else{
 245                                         PolicyLogger.error(MessageCodes.ERROR_UNKNOWN + "Failed to delete the policy for an unknown reason.  Check the file system and other logs for further information.");
 246                                         response.addHeader("error", "unknown");
 247                                         response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR );
 248                                         return;
 249                                 }
 250                         }
 251                         em.getTransaction().commit();
 252                 }catch(Exception e){
 253                         em.getTransaction().rollback();
 254                         PolicyLogger.error(MessageCodes.EXCEPTION_ERROR, e, "XACMLPapServlet", " ERROR");
 255                         response.addHeader("error", "deleteDB");
 256                         response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
 257                         return;
 258                 } finally {
 259                         em.close();
 260                         if(con != null){
 261                                 con.close();
 262                         }
 263                 }
 264
 265                 if (policyVersionDeleted) {
 266                         response.setStatus(HttpServletResponse.SC_OK);
 267                         response.addHeader("successMapKey", "success");
 268                         response.addHeader("operation", "delete");
 269                         return;
 270                 } else {
 271                         PolicyLogger.error(MessageCodes.ERROR_UNKNOWN + "Failed to delete the policy for an unknown reason.  Check the file system and other logs for further information.");
 272                         response.addHeader("error", "unknown");
 273                         response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR );
 274                         return;
 275                 }
 276         }
 277
 278         public static String deletePolicyEntityData(EntityManager em, PolicyEntity policyEntity){
 279                 PolicyElasticSearchController controller = new PolicyElasticSearchController();
 280                 PolicyRestAdapter policyData = new PolicyRestAdapter();
 281                 String policyName = policyEntity.getPolicyName();
 282                 try{
 283                         if(policyName.contains("Config_")){
 284                                 em.remove(policyEntity.getConfigurationData());
 285                         }else if(policyName.contains("Action_")){
 286                                 em.remove(policyEntity.getActionBodyEntity());
 287                         }
 288                         String searchPolicyName = policyEntity.getScope() + "." + policyEntity.getPolicyName();
 289                         policyData.setNewFileName(searchPolicyName);
 290                         controller.deleteElk(policyData);
 291                         em.remove(policyEntity);
 292                 }catch(Exception e){
 293                         logger.error(e.getMessage(),e);
 294                         return "error";
 295                 }
 296                 return "success";
 297         }
 298
 299         public static boolean checkPolicyGroupEntity(EntityManager em, Connection con, List<?> peResult) throws SQLException{
 300                 for(Object peData : peResult){
 301                         PolicyEntity policyEntity = (PolicyEntity) peData;
 302                         Statement st = null;
 303                         ResultSet rs = null;
 304                         try{
 305                                 st = con.createStatement();
 306                                 rs = st.executeQuery("Select * from PolicyGroupEntity where policyid = '"+policyEntity.getPolicyId()+"'");
 307                                 boolean gEntityList = rs.next();
 308                                 rs.close();
 309                                 if(gEntityList){
 310                                         return true;
 311                                 }
 312                         }finally{
 313                                 if(st != null){
 314                                         st.close();
 315                                 }
 316                         }
 317                 }
 318                 return false;
 319         }
 320
 321         public void doAPIDeleteFromPDP(HttpServletRequest request, HttpServletResponse response, ONAPLoggingContext loggingContext) throws IOException {
 322                 String policyName = request.getParameter("policyName");
 323                 String groupId = request.getParameter("groupId");
 324                 String responseString = null;
 325                 // for PUT operations the group may or may not need to exist before the operation can be done
 326                 OnapPDPGroup group = null;
 327                 try {
 328                         group = XACMLPapServlet.getPAPEngine().getGroup(groupId);
 329                 } catch (PAPException e) {
 330                         PolicyLogger.error("Exception occured While PUT operation is performing for PDP Group"+e);
 331                 }
 332                 if (group == null) {
 333                         String message = "Unknown groupId '" + groupId + "'";
 334                         PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE + " " + message);
 335                         loggingContext.transactionEnded();
 336                         PolicyLogger.audit("Transaction Failed - See Error.log");
 337                         response.addHeader("error", "UnknownGroup");
 338                         response.sendError(HttpServletResponse.SC_NOT_FOUND, message);
 339                         return;
 340                 } else {
 341                         loggingContext.setServiceName("API:PAP.deletPolicyFromPDPGroup");
 342                         if (policyName.contains("xml")) {
 343                                 PolicyLogger.debug("The full file name including the extension was provided for policyName.. continue.");
 344                         } else {
 345                                 String message = XACMLErrorConstants.ERROR_DATA_ISSUE + "Invalid policyName... "
 346                                                 + "policyName must be the full name of the file to be deleted including version and extension";
 347                                 PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE + " Invalid policyName... "
 348                                                 + "policyName must be the full name of the file to be deleted including version and extension");
 349                                 response.addHeader("error", message);
 350                         response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
 351                                 return;
 352                         }
 353                         RemoveGroupPolicy removePolicy = new RemoveGroupPolicy((StdPDPGroup) group);
 354                         PDPPolicy policy =  group.getPolicy(policyName);
 355                         if (policy != null) {
 356
 357                                 if ((policy.getId().contains("Config_MS_")) || (policy.getId().contains("BRMS_Param"))) {
 358                                         if (preSafetyCheck(policy)) {
 359                                                 PolicyLogger.debug("Precheck Successful.");
 360                                         }
 361                                 }
 362
 363                                 removePolicy.prepareToRemove(policy);
 364                                 OnapPDPGroup updatedGroup = removePolicy.getUpdatedObject();
 365                                 responseString = deletePolicyFromPDPGroup(updatedGroup, loggingContext);
 366                         } else {
 367                                 String message = XACMLErrorConstants.ERROR_DATA_ISSUE + "Policy does not exist on the PDP.";
 368                                 PolicyLogger.error(message);
 369                                 PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE + " Policy does not exist on the PDP.");
 370                                 response.addHeader("error", message);
 371                                 response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
 372                                 return;
 373                         }
 374                 }
 375                 if (responseString.equals("success")) {
 376                         loggingContext.transactionEnded();
 377                         PolicyLogger.info("Policy successfully deleted!");
 378                         PolicyLogger.audit("Policy successfully deleted!");
 379                         response.setStatus(HttpServletResponse.SC_OK);
 380                         response.addHeader("successMapKey", "success");
 381                         response.addHeader("operation", "delete");
 382                         return;
 383                 } else if (responseString.equals("No Group")) {
 384                         String message = XACMLErrorConstants.ERROR_DATA_ISSUE + "Group update had bad input.";
 385                         PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE + " Group update had bad input.");
 386                         response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
 387                         response.addHeader("error", "groupUpdate");
 388                         response.addHeader("message", message);
 389                         return;
 390                 } else if (responseString.equals("DB Error")) {
 391                         PolicyLogger.error(MessageCodes.ERROR_PROCESS_FLOW + " Error while updating group in the database");
 392                         response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
 393                         response.addHeader("error", "deleteDB");
 394                         return;
 395                 } else {
 396                         PolicyLogger.error(MessageCodes.ERROR_UNKNOWN + " Failed to delete the policy for an unknown reason.  Check the file system and other logs for further information.");
 397                         response.addHeader("error", "unknown");
 398                         response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR );
 399                         return;
 400                 }
 401         }
 402
 403         private String deletePolicyFromPDPGroup (OnapPDPGroup group, ONAPLoggingContext loggingContext){
 404                 PolicyDBDaoTransaction acPutTransaction = XACMLPapServlet.getDbDaoTransaction();
 405                 String response = null;
 406                 loggingContext.setServiceName("API:PAP.DeleteHandler");
 407                 OnapPDPGroup existingGroup = null;
 408                 try {
 409                         existingGroup = XACMLPapServlet.getPAPEngine().getGroup(group.getId());
 410                 } catch (PAPException e1) {
 411                         PolicyLogger.error("Exception occured While Deleting Policy From PDP Group"+e1);
 412                 }
 413                 if (group == null || ! (group instanceof StdPDPGroup) || existingGroup == null || ! (group.getId().equals(existingGroup.getId()))) {
 414                         String existingID = null;
 415                         if(existingGroup != null){
 416                                 existingID = existingGroup.getId();
 417                         }
 418                         PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE + " Group update had bad input. id=" + existingID + " objectFromJSON="+group);
 419                         loggingContext.transactionEnded();
 420                         PolicyLogger.audit("Transaction Failed - See Error.log");
 421                         response = "No Group";
 422                         return response;
 423                 }
 424                 // The Path on the PAP side is not carried on the RESTful interface with the AC
 425                 // (because it is local to the PAP)
 426                 // so we need to fill that in before submitting the group for update
 427                 ((StdPDPGroup)group).setDirectory(((StdPDPGroup)existingGroup).getDirectory());
 428                 try{
 429                         acPutTransaction.updateGroup(group, "XACMLPapServlet.doAPIDelete");
 430                 } catch(Exception e){
 431                         PolicyLogger.error(MessageCodes.ERROR_PROCESS_FLOW, e, "XACMLPapServlet", " Error while updating group in the database: "
 432                                         +"group="+existingGroup.getId());
 433                         response = "DB Error";
 434                         return response;
 435                 }
 436                 try {
 437                         XACMLPapServlet.getPAPEngine().updateGroup(group);
 438                 } catch (PAPException e) {
 439                         PolicyLogger.error("Exception occured While Updating PDP Groups"+e);
 440                         response = "error in updateGroup method";
 441                 }
 442                 PolicyLogger.debug("Group '" + group.getId() + "' updated");
 443                 acPutTransaction.commitTransaction();
 444                 // Group changed, which might include changing the policies
 445                 try {
 446                         newgroup = existingGroup;
 447                 }  catch (Exception e) {
 448                         PolicyLogger.error("Exception occured in Group Change Method"+e);
 449                         response = "error in groupChanged method";
 450                 }
 451                 if (response==null){
 452                         response = "success";
 453                         loggingContext.transactionEnded();
 454                         PolicyLogger.audit("Policy successfully deleted!");
 455                 }
 456                 loggingContext.transactionEnded();
 457                 PolicyLogger.audit("Transaction Ended");
 458                 return response;
 459         }
 460
 461         public OnapPDPGroup getDeletedGroup(){
 462                 return newgroup;
 463         }
 464
 465         public boolean preSafetyCheck(PDPPolicy policy) {
 466                 return true;
 467         }
 468
 469         public static DeleteHandler getInstance() {
 470                 try {
 471                         Class<?> deleteHandler = Class.forName(XACMLProperties.getProperty("deletePolicy.impl.className", DeleteHandler.class.getName()));
 472                         return (DeleteHandler) deleteHandler.newInstance();
 473                 } catch (Exception e) {
 474                         logger.error(e.getMessage(),e);
 475                 }
 476                 return null;
 477         }
 478
 479 }