src/main/java/org/onap/music/datastore/MusicDataStore.java

   1 /*
   2  * ============LICENSE_START==========================================
   3  * org.onap.music
   4  * ===================================================================
   5  *  Copyright (c) 2017 AT&T Intellectual Property
   6  * ===================================================================
   7  *  Modifications Copyright (c) 2018-2019 IBM
   8  *  Modifications Copyright (c) 2019 Samsung
   9  * ===================================================================
  10  *  Licensed under the Apache License, Version 2.0 (the "License");
  11  *  you may not use this file except in compliance with the License.
  12  *  You may obtain a copy of the License at
  13  *
  14  *     http://www.apache.org/licenses/LICENSE-2.0
  15  *
  16  *  Unless required by applicable law or agreed to in writing, software
  17  *  distributed under the License is distributed on an "AS IS" BASIS,
  18  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  19  *  See the License for the specific language governing permissions and
  20  *  limitations under the License.
  21  *
  22  * ============LICENSE_END=============================================
  23  * ====================================================================
  24  */
  25
  26 package org.onap.music.datastore;
  27
  28 import java.net.InetAddress;
  29 import java.net.NetworkInterface;
  30 import java.net.SocketException;
  31 import java.nio.ByteBuffer;
  32 import java.util.ArrayList;
  33 import java.util.Enumeration;
  34 import java.util.HashMap;
  35 import java.util.Iterator;
  36 import java.util.Map;
  37
  38 import org.onap.music.eelf.logging.EELFLoggerDelegate;
  39 import org.onap.music.eelf.logging.format.AppMessages;
  40 import org.onap.music.eelf.logging.format.ErrorSeverity;
  41 import org.onap.music.eelf.logging.format.ErrorTypes;
  42 import org.onap.music.exceptions.MusicQueryException;
  43 import org.onap.music.exceptions.MusicServiceException;
  44 import org.onap.music.main.CipherUtil;
  45 import org.onap.music.main.MusicUtil;
  46 import com.datastax.driver.core.Cluster;
  47 import com.datastax.driver.core.ColumnDefinitions;
  48 import com.datastax.driver.core.ColumnDefinitions.Definition;
  49 import com.datastax.driver.core.ConsistencyLevel;
  50 import com.datastax.driver.core.DataType;
  51 import com.datastax.driver.core.HostDistance;
  52 import com.datastax.driver.core.KeyspaceMetadata;
  53 import com.datastax.driver.core.Metadata;
  54 import com.datastax.driver.core.PoolingOptions;
  55 import com.datastax.driver.core.ResultSet;
  56 import com.datastax.driver.core.Row;
  57 import com.datastax.driver.core.Session;
  58 import com.datastax.driver.core.SimpleStatement;
  59 import com.datastax.driver.core.TableMetadata;
  60 import com.datastax.driver.core.exceptions.AlreadyExistsException;
  61 import com.datastax.driver.core.exceptions.InvalidQueryException;
  62 import com.datastax.driver.core.exceptions.NoHostAvailableException;
  63
  64 /**
  65  * @author nelson24
  66  *
  67  */
  68 public class MusicDataStore {
  69
  70     public static final String CONSISTENCY_LEVEL_ONE = "ONE";
  71     public static final String CONSISTENCY_LEVEL_QUORUM = "QUORUM";
  72     private Session session;
  73     private Cluster cluster;
  74
  75
  76     /**
  77      * @param session
  78      */
  79     public void setSession(Session session) {
  80         this.session = session;
  81     }
  82
  83     /**
  84      * @param session
  85      */
  86     public Session getSession() {
  87         return session;
  88     }
  89
  90     /**
  91      * @param cluster
  92      */
  93     public void setCluster(Cluster cluster) {
  94         this.cluster = cluster;
  95     }
  96
  97
  98     private EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(MusicDataStore.class);
  99
 100     /**
 101      *
 102      */
 103     public MusicDataStore() {
 104         connectToCassaCluster();
 105     }
 106
 107
 108     /**
 109      * @param cluster
 110      * @param session
 111      */
 112     public MusicDataStore(Cluster cluster, Session session) {
 113         this.session = session;
 114         this.cluster = cluster;
 115     }
 116
 117     /**
 118      *
 119      * @param remoteIp
 120      * @throws MusicServiceException
 121      */
 122     public MusicDataStore(String remoteIp) {
 123         try {
 124             connectToCassaCluster(remoteIp);
 125         } catch (MusicServiceException e) {
 126             logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(), e);
 127         }
 128     }
 129
 130     /**
 131      *
 132      * @return
 133      */
 134     private ArrayList<String> getAllPossibleLocalIps() {
 135         ArrayList<String> allPossibleIps = new ArrayList<>();
 136         try {
 137             Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces();
 138             while (en.hasMoreElements()) {
 139                 NetworkInterface ni = en.nextElement();
 140                 Enumeration<InetAddress> ee = ni.getInetAddresses();
 141                 while (ee.hasMoreElements()) {
 142                     InetAddress ia = ee.nextElement();
 143                     allPossibleIps.add(ia.getHostAddress());
 144                 }
 145             }
 146         } catch (SocketException e) {
 147             logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(), AppMessages.CONNCECTIVITYERROR,
 148                 ErrorSeverity.ERROR, ErrorTypes.CONNECTIONERROR, e);
 149         }catch(Exception e) {
 150             logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(), ErrorSeverity.ERROR, ErrorTypes
 151                 .GENERALSERVICEERROR, e);
 152         }
 153         return allPossibleIps;
 154     }
 155
 156     /**
 157      * This method iterates through all available IP addresses and connects to multiple cassandra
 158      * clusters.
 159      */
 160     private void connectToCassaCluster() {
 161         Iterator<String> it = getAllPossibleLocalIps().iterator();
 162         String address = "localhost";
 163         String[] addresses = null;
 164         address = MusicUtil.getMyCassaHost();
 165         addresses = address.split(",");
 166
 167         logger.info(EELFLoggerDelegate.applicationLogger,
 168                         "Connecting to cassa cluster: Iterating through possible ips:"
 169                                         + getAllPossibleLocalIps());
 170         PoolingOptions poolingOptions = new PoolingOptions();
 171         poolingOptions
 172         .setConnectionsPerHost(HostDistance.LOCAL,  4, 10)
 173         .setConnectionsPerHost(HostDistance.REMOTE, 2, 4);
 174         while (it.hasNext()) {
 175             try {
 176                 if(MusicUtil.getCassName() != null && MusicUtil.getCassPwd() != null) {
 177                     String cassPwd = CipherUtil.decryptPKC(MusicUtil.getCassPwd());
 178                     logger.info(EELFLoggerDelegate.applicationLogger,
 179                             "Building with credentials "+MusicUtil.getCassName()+" & "+MusicUtil.getCassPwd());
 180                     cluster = Cluster.builder().withPort(MusicUtil.getCassandraPort())
 181                                         .withCredentials(MusicUtil.getCassName(), cassPwd)
 182                                         //.withLoadBalancingPolicy(new RoundRobinPolicy())
 183                                         .withoutJMXReporting()
 184                                         .withPoolingOptions(poolingOptions)
 185                                         .addContactPoints(addresses).build();
 186                 }
 187                 else
 188                     cluster = Cluster.builder().withPort(MusicUtil.getCassandraPort())
 189                                         //.withLoadBalancingPolicy(new RoundRobinPolicy())
 190                                         .addContactPoints(addresses).build();
 191
 192                 Metadata metadata = cluster.getMetadata();
 193                 logger.info(EELFLoggerDelegate.applicationLogger, "Connected to cassa cluster "
 194                                 + metadata.getClusterName() + " at " + address);
 195                 session = cluster.connect();
 196
 197                 break;
 198             } catch (NoHostAvailableException e) {
 199                 address = it.next();
 200                 logger.error(EELFLoggerDelegate.errorLogger, e.getMessage(),AppMessages.HOSTUNAVAILABLE,
 201                     ErrorSeverity.ERROR, ErrorTypes.CONNECTIONERROR, e);
 202             }
 203         }
 204     }
 205
 206     /**
 207      *
 208      */
 209     public void close() {
 210         session.close();
 211     }
 212
 213     /**
 214      * This method connects to cassandra cluster on specific address.
 215      *
 216      * @param address
 217      */
 218     private void connectToCassaCluster(String address) throws MusicServiceException {
 219         String[] addresses = null;
 220         addresses = address.split(",");
 221         PoolingOptions poolingOptions = new PoolingOptions();
 222         poolingOptions
 223         .setConnectionsPerHost(HostDistance.LOCAL,  4, 10)
 224         .setConnectionsPerHost(HostDistance.REMOTE, 2, 4);
 225         if(MusicUtil.getCassName() != null && MusicUtil.getCassPwd() != null) {
 226             String cassPwd = CipherUtil.decryptPKC(MusicUtil.getCassPwd());
 227             logger.info(EELFLoggerDelegate.applicationLogger,
 228                     "Building with credentials "+MusicUtil.getCassName()+" & "+ MusicUtil.getCassPwd());
 229             cluster = Cluster.builder().withPort(MusicUtil.getCassandraPort())
 230                         .withCredentials(MusicUtil.getCassName(), cassPwd)
 231                         //.withLoadBalancingPolicy(new RoundRobinPolicy())
 232                         .withoutJMXReporting()
 233                         .withPoolingOptions(poolingOptions)
 234                         .addContactPoints(addresses).build();
 235         } else {
 236             cluster = Cluster.builder().withPort(MusicUtil.getCassandraPort())
 237                         .withoutJMXReporting()
 238                         .withPoolingOptions(poolingOptions)
 239                         .addContactPoints(addresses).build();
 240         }
 241
 242         Metadata metadata = cluster.getMetadata();
 243         logger.info(EELFLoggerDelegate.applicationLogger, "Connected to cassa cluster "
 244                         + metadata.getClusterName() + " at " + address);
 245         try {
 246             session = cluster.connect();
 247         } catch (Exception ex) {
 248             logger.error(EELFLoggerDelegate.errorLogger, ex.getMessage(),AppMessages.CASSANDRACONNECTIVITY,
 249                 ErrorSeverity.ERROR, ErrorTypes.SERVICEUNAVAILABLE, ex);
 250             throw new MusicServiceException(
 251                             "Error while connecting to Cassandra cluster.. " + ex.getMessage());
 252         }
 253     }
 254
 255     /**
 256      *
 257      * @param keyspace
 258      * @param tableName
 259      * @param columnName
 260      * @return DataType
 261      */
 262     public DataType returnColumnDataType(String keyspace, String tableName, String columnName) {
 263         KeyspaceMetadata ks = cluster.getMetadata().getKeyspace(keyspace);
 264         TableMetadata table = ks.getTable(tableName);
 265         return table.getColumn(columnName).getType();
 266
 267     }
 268
 269     /**
 270      *
 271      * @param keyspace
 272      * @param tableName
 273      * @return TableMetadata
 274      */
 275     public TableMetadata returnColumnMetadata(String keyspace, String tableName) {
 276         KeyspaceMetadata ks = cluster.getMetadata().getKeyspace(keyspace);
 277         return ks.getTable(tableName);
 278     }
 279
 280     /**
 281     *
 282     * @param keyspace
 283     * @param tableName
 284     * @return TableMetadata
 285     */
 286    public KeyspaceMetadata returnKeyspaceMetadata(String keyspace) {
 287        KeyspaceMetadata ks = cluster.getMetadata().getKeyspace(keyspace);
 288        return ks;
 289    }
 290
 291
 292     /**
 293      * Utility function to return the Java specific object type.
 294      *
 295      * @param row
 296      * @param colName
 297      * @param colType
 298      * @return
 299      */
 300     public Object getColValue(Row row, String colName, DataType colType) {
 301
 302         switch (colType.getName()) {
 303             case VARCHAR:
 304                 return row.getString(colName);
 305             case UUID:
 306                 return row.getUUID(colName);
 307             case VARINT:
 308                 return row.getVarint(colName);
 309             case BIGINT:
 310                 return row.getLong(colName);
 311             case INT:
 312                 return row.getInt(colName);
 313             case FLOAT:
 314                 return row.getFloat(colName);
 315             case DOUBLE:
 316                 return row.getDouble(colName);
 317             case BOOLEAN:
 318                 return row.getBool(colName);
 319             case MAP:
 320                 return row.getMap(colName, String.class, String.class);
 321             case LIST:
 322                 return row.getList(colName, String.class);
 323             default:
 324                 return null;
 325         }
 326     }
 327
 328     public byte[] getBlobValue(Row row, String colName, DataType colType) {
 329         ByteBuffer bb = row.getBytes(colName);
 330         return bb.array();
 331     }
 332
 333     public boolean doesRowSatisfyCondition(Row row, Map<String, Object> condition) throws Exception {
 334         ColumnDefinitions colInfo = row.getColumnDefinitions();
 335
 336         for (Map.Entry<String, Object> entry : condition.entrySet()) {
 337             String colName = entry.getKey();
 338             DataType colType = colInfo.getType(colName);
 339             Object columnValue = getColValue(row, colName, colType);
 340             Object conditionValue = MusicUtil.convertToActualDataType(colType, entry.getValue());
 341             if (columnValue.equals(conditionValue) == false)
 342                 return false;
 343         }
 344         return true;
 345     }
 346
 347     /**
 348      * Utility function to store ResultSet values in to a MAP for output.
 349      *
 350      * @param results
 351      * @return MAP
 352      */
 353     public Map<String, HashMap<String, Object>> marshalData(ResultSet results) {
 354         Map<String, HashMap<String, Object>> resultMap =
 355                         new HashMap<>();
 356         int counter = 0;
 357         for (Row row : results) {
 358             ColumnDefinitions colInfo = row.getColumnDefinitions();
 359             HashMap<String, Object> resultOutput = new HashMap<>();
 360             for (Definition definition : colInfo) {
 361                 if (!(("vector_ts").equals(definition.getName()))) {
 362                     if(definition.getType().toString().toLowerCase().contains("blob")) {
 363                         resultOutput.put(definition.getName(),
 364                                 getBlobValue(row, definition.getName(), definition.getType()));
 365                     } else {
 366                         resultOutput.put(definition.getName(),
 367                                     getColValue(row, definition.getName(), definition.getType()));
 368                     }
 369                 }
 370             }
 371             resultMap.put("row " + counter, resultOutput);
 372             counter++;
 373         }
 374         return resultMap;
 375     }
 376
 377
 378     // Prepared Statements 1802 additions
 379
 380     public boolean executePut(PreparedQueryObject queryObject, String consistency)
 381             throws MusicServiceException, MusicQueryException {
 382         return executePut(queryObject, consistency, 0);
 383     }
 384     /**
 385      * This Method performs DDL and DML operations on Cassandra using specified consistency level
 386      *
 387      * @param queryObject Object containing cassandra prepared query and values.
 388      * @param consistency Specify consistency level for data synchronization across cassandra
 389      *        replicas
 390      * @return Boolean Indicates operation success or failure
 391      * @throws MusicServiceException
 392      * @throws MusicQueryException
 393      */
 394     public boolean executePut(PreparedQueryObject queryObject, String consistency,long timeSlot)
 395                     throws MusicServiceException, MusicQueryException {
 396
 397         boolean result = false;
 398         long timeOfWrite = System.currentTimeMillis();
 399         if (!MusicUtil.isValidQueryObject(!queryObject.getValues().isEmpty(), queryObject)) {
 400             logger.error(EELFLoggerDelegate.errorLogger, queryObject.getQuery(),AppMessages.QUERYERROR, ErrorSeverity.ERROR, ErrorTypes.QUERYERROR);
 401             throw new MusicQueryException("Ill formed queryObject for the request = " + "["
 402                             + queryObject.getQuery() + "]");
 403         }
 404         logger.debug(EELFLoggerDelegate.applicationLogger,
 405                         "In preprared Execute Put: the actual insert query:"
 406                                         + queryObject.getQuery() + "; the values"
 407                                         + queryObject.getValues());
 408         SimpleStatement preparedInsert = null;
 409
 410         try {
 411             preparedInsert = new SimpleStatement(queryObject.getQuery(), queryObject.getValues().toArray());
 412             if (consistency.equalsIgnoreCase(MusicUtil.CRITICAL)) {
 413                 logger.info(EELFLoggerDelegate.applicationLogger, "Executing critical put query");
 414                 preparedInsert.setConsistencyLevel(ConsistencyLevel.QUORUM);
 415             } else if (consistency.equalsIgnoreCase(MusicUtil.EVENTUAL)) {
 416                 logger.info(EELFLoggerDelegate.applicationLogger, "Executing simple put query");
 417                 if(queryObject.getConsistency() == null)
 418                     preparedInsert.setConsistencyLevel(ConsistencyLevel.ONE);
 419                 else
 420                     preparedInsert.setConsistencyLevel(MusicUtil.getConsistencyLevel(queryObject.getConsistency()));
 421             } else if (consistency.equalsIgnoreCase(MusicUtil.ONE)) {
 422                 preparedInsert.setConsistencyLevel(ConsistencyLevel.ONE);
 423             }  else if (consistency.equalsIgnoreCase(MusicUtil.QUORUM)) {
 424                 preparedInsert.setConsistencyLevel(ConsistencyLevel.LOCAL_QUORUM);
 425             } else if (consistency.equalsIgnoreCase(MusicUtil.ALL)) {
 426                 preparedInsert.setConsistencyLevel(ConsistencyLevel.ALL);
 427             }
 428             long timestamp = MusicUtil.v2sTimeStampInMicroseconds(timeSlot, timeOfWrite);
 429             preparedInsert.setDefaultTimestamp(timestamp);
 430
 431             ResultSet rs = session.execute(preparedInsert);
 432             result = rs.wasApplied();
 433
 434         }
 435         catch (AlreadyExistsException ae) {
 436             // logger.error(EELFLoggerDelegate.errorLogger,"AlreadExistsException: " + ae.getMessage(),AppMessages.QUERYERROR,
 437             // ErrorSeverity.ERROR, ErrorTypes.QUERYERROR);
 438             throw new MusicQueryException("AlreadyExistsException: " + ae.getMessage(),ae);
 439         } catch ( InvalidQueryException e ) {
 440             // logger.error(EELFLoggerDelegate.errorLogger,"InvalidQueryException: " + e.getMessage(),AppMessages.SESSIONFAILED + " ["
 441             // + queryObject.getQuery() + "]", ErrorSeverity.ERROR, ErrorTypes.QUERYERROR);
 442             throw new MusicQueryException("InvalidQueryException: " + e.getMessage(),e);
 443         } catch (Exception e) {
 444             // logger.error(EELFLoggerDelegate.errorLogger,e.getClass().toString() + ":" + e.getMessage(),AppMessages.SESSIONFAILED + " ["
 445             //     + queryObject.getQuery() + "]", ErrorSeverity.ERROR, ErrorTypes.QUERYERROR, e);
 446             throw new MusicServiceException("Executing Session Failure for Request = " + "["
 447                 + queryObject.getQuery() + "]" + " Reason = " + e.getMessage(),e);
 448         }
 449         return result;
 450     }
 451
 452  /*   *//**
 453      * This method performs DDL operations on Cassandra using consistency level ONE.
 454      *
 455      * @param queryObject Object containing cassandra prepared query and values.
 456      * @return ResultSet
 457      * @throws MusicServiceException
 458      * @throws MusicQueryException
 459      *//*
 460     public ResultSet executeEventualGet(PreparedQueryObject queryObject)
 461                     throws MusicServiceException, MusicQueryException {
 462         CacheAccess<String, PreparedStatement> queryBank = CachingUtil.getStatementBank();
 463         PreparedStatement preparedEventualGet = null;
 464         if (!MusicUtil.isValidQueryObject(!queryObject.getValues().isEmpty(), queryObject)) {
 465             logger.error(EELFLoggerDelegate.errorLogger, "",AppMessages.QUERYERROR+ " [" + queryObject.getQuery() + "]", ErrorSeverity.ERROR, ErrorTypes.QUERYERROR);
 466             throw new MusicQueryException("Ill formed queryObject for the request = " + "["
 467                             + queryObject.getQuery() + "]");
 468         }
 469         logger.info(EELFLoggerDelegate.applicationLogger,
 470                         "Executing Eventual  get query:" + queryObject.getQuery());
 471
 472         ResultSet results = null;
 473         try {
 474             if(queryBank.get(queryObject.getQuery()) != null )
 475                 preparedEventualGet=queryBank.get(queryObject.getQuery());
 476             else {
 477                 preparedEventualGet = session.prepare(queryObject.getQuery());
 478                 CachingUtil.updateStatementBank(queryObject.getQuery(), preparedEventualGet);
 479             }
 480             if(queryObject.getConsistency() == null) {
 481                 preparedEventualGet.setConsistencyLevel(ConsistencyLevel.ONE);
 482             } else {
 483                 preparedEventualGet.setConsistencyLevel(MusicUtil.getConsistencyLevel(queryObject.getConsistency()));
 484             }
 485             results = session.execute(preparedEventualGet.bind(queryObject.getValues().toArray()));
 486
 487         } catch (Exception ex) {
 488             logger.error("Exception", ex);
 489             logger.error(EELFLoggerDelegate.errorLogger, ex.getMessage(),AppMessages.UNKNOWNERROR+ "[" + queryObject.getQuery() + "]", ErrorSeverity.ERROR, ErrorTypes.QUERYERROR);
 490             throw new MusicServiceException(ex.getMessage());
 491         }
 492         return results;
 493     }
 494
 495     *//**
 496      *
 497      * This method performs DDL operation on Cassandra using consistency level QUORUM.
 498      *
 499      * @param queryObject Object containing cassandra prepared query and values.
 500      * @return ResultSet
 501      * @throws MusicServiceException
 502      * @throws MusicQueryException
 503      *//*
 504     public ResultSet executeCriticalGet(PreparedQueryObject queryObject)
 505                     throws MusicServiceException, MusicQueryException {
 506         if (!MusicUtil.isValidQueryObject(!queryObject.getValues().isEmpty(), queryObject)) {
 507             logger.error(EELFLoggerDelegate.errorLogger, "",AppMessages.QUERYERROR+ " [" + queryObject.getQuery() + "]", ErrorSeverity.ERROR, ErrorTypes.QUERYERROR);
 508             throw new MusicQueryException("Error processing Prepared Query Object for the request = " + "["
 509                             + queryObject.getQuery() + "]");
 510         }
 511         logger.info(EELFLoggerDelegate.applicationLogger,
 512                         "Executing Critical get query:" + queryObject.getQuery());
 513         PreparedStatement preparedEventualGet = session.prepare(queryObject.getQuery());
 514         preparedEventualGet.setConsistencyLevel(ConsistencyLevel.QUORUM);
 515         ResultSet results = null;
 516         try {
 517             results = session.execute(preparedEventualGet.bind(queryObject.getValues().toArray()));
 518         } catch (Exception ex) {
 519             logger.error("Exception", ex);
 520             logger.error(EELFLoggerDelegate.errorLogger, ex.getMessage(),AppMessages.UNKNOWNERROR+ "[" + queryObject.getQuery() + "]", ErrorSeverity.ERROR, ErrorTypes.QUERYERROR);
 521             throw new MusicServiceException(ex.getMessage());
 522         }
 523         return results;
 524
 525     }
 526     */
 527     public ResultSet executeGet(PreparedQueryObject queryObject,String consistencyLevel) throws MusicQueryException, MusicServiceException {
 528         if (!MusicUtil.isValidQueryObject(!queryObject.getValues().isEmpty(), queryObject)) {
 529             logger.error(EELFLoggerDelegate.errorLogger, "",AppMessages.QUERYERROR+ " [" + queryObject.getQuery() + "]", ErrorSeverity.ERROR, ErrorTypes.QUERYERROR);
 530             throw new MusicQueryException("Error processing Prepared Query Object for the request = " + "["
 531                             + queryObject.getQuery() + "]");
 532         }
 533         ResultSet results = null;
 534         try {
 535             SimpleStatement statement = new SimpleStatement(queryObject.getQuery(), queryObject.getValues().toArray());
 536
 537             if (consistencyLevel.equalsIgnoreCase(CONSISTENCY_LEVEL_ONE)) {
 538                 if(queryObject.getConsistency() == null) {
 539                     statement.setConsistencyLevel(ConsistencyLevel.ONE);
 540                 } else {
 541                     statement.setConsistencyLevel(MusicUtil.getConsistencyLevel(queryObject.getConsistency()));
 542                 }
 543             }
 544             else if (consistencyLevel.equalsIgnoreCase(CONSISTENCY_LEVEL_QUORUM)) {
 545                 statement.setConsistencyLevel(ConsistencyLevel.QUORUM);
 546             }
 547
 548             results = session.execute(statement);
 549
 550         } catch (Exception ex) {
 551             logger.error(EELFLoggerDelegate.errorLogger, "Execute Get Error" + ex.getMessage(),AppMessages.UNKNOWNERROR+ "[" + queryObject
 552                 .getQuery() + "]", ErrorSeverity.ERROR, ErrorTypes.QUERYERROR, ex);
 553             throw new MusicServiceException("Execute Get Error" + ex.getMessage());
 554         }
 555
 556         return results;
 557
 558     }
 559
 560     /**
 561      * This method performs DDL operations on Cassandra using consistency level ONE.
 562      *
 563      * @param queryObject Object containing cassandra prepared query and values.
 564      */
 565     public ResultSet executeOneConsistencyGet(PreparedQueryObject queryObject)
 566                     throws MusicServiceException, MusicQueryException {
 567         return executeGet(queryObject, CONSISTENCY_LEVEL_ONE);
 568     }
 569
 570     /**
 571      *
 572      * This method performs DDL operation on Cassandra using consistency level QUORUM.
 573      *
 574      * @param queryObject Object containing cassandra prepared query and values.
 575      */
 576     public ResultSet executeQuorumConsistencyGet(PreparedQueryObject queryObject)
 577                     throws MusicServiceException, MusicQueryException {
 578         return executeGet(queryObject, CONSISTENCY_LEVEL_QUORUM);
 579     }
 580
 581 }