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        return cluster.getMetadata().getKeyspace(keyspace);
 288    }
 289
 290
 291     /**
 292      * Utility function to return the Java specific object type.
 293      *
 294      * @param row
 295      * @param colName
 296      * @param colType
 297      * @return
 298      */
 299     public Object getColValue(Row row, String colName, DataType colType) {
 300
 301         switch (colType.getName()) {
 302             case VARCHAR:
 303                 return row.getString(colName);
 304             case UUID:
 305                 return row.getUUID(colName);
 306             case VARINT:
 307                 return row.getVarint(colName);
 308             case BIGINT:
 309                 return row.getLong(colName);
 310             case INT:
 311                 return row.getInt(colName);
 312             case FLOAT:
 313                 return row.getFloat(colName);
 314             case DOUBLE:
 315                 return row.getDouble(colName);
 316             case BOOLEAN:
 317                 return row.getBool(colName);
 318             case MAP:
 319                 return row.getMap(colName, String.class, String.class);
 320             case LIST:
 321                 return row.getList(colName, String.class);
 322             default:
 323                 return null;
 324         }
 325     }
 326
 327     public byte[] getBlobValue(Row row, String colName, DataType colType) {
 328         ByteBuffer bb = row.getBytes(colName);
 329         return bb.array();
 330     }
 331
 332     public boolean doesRowSatisfyCondition(Row row, Map<String, Object> condition) throws Exception {
 333         ColumnDefinitions colInfo = row.getColumnDefinitions();
 334
 335         for (Map.Entry<String, Object> entry : condition.entrySet()) {
 336             String colName = entry.getKey();
 337             DataType colType = colInfo.getType(colName);
 338             Object columnValue = getColValue(row, colName, colType);
 339             Object conditionValue = MusicUtil.convertToActualDataType(colType, entry.getValue());
 340             if (columnValue.equals(conditionValue) == false)
 341                 return false;
 342         }
 343         return true;
 344     }
 345
 346     /**
 347      * Utility function to store ResultSet values in to a MAP for output.
 348      *
 349      * @param results
 350      * @return MAP
 351      */
 352     public Map<String, HashMap<String, Object>> marshalData(ResultSet results) {
 353         Map<String, HashMap<String, Object>> resultMap =
 354                         new HashMap<>();
 355         int counter = 0;
 356         for (Row row : results) {
 357             ColumnDefinitions colInfo = row.getColumnDefinitions();
 358             HashMap<String, Object> resultOutput = new HashMap<>();
 359             for (Definition definition : colInfo) {
 360                 if (!(("vector_ts").equals(definition.getName()))) {
 361                     if(definition.getType().toString().toLowerCase().contains("blob")) {
 362                         resultOutput.put(definition.getName(),
 363                                 getBlobValue(row, definition.getName(), definition.getType()));
 364                     } else {
 365                         resultOutput.put(definition.getName(),
 366                                     getColValue(row, definition.getName(), definition.getType()));
 367                     }
 368                 }
 369             }
 370             resultMap.put("row " + counter, resultOutput);
 371             counter++;
 372         }
 373         return resultMap;
 374     }
 375
 376
 377     // Prepared Statements 1802 additions
 378
 379     public boolean executePut(PreparedQueryObject queryObject, String consistency)
 380             throws MusicServiceException, MusicQueryException {
 381         return executePut(queryObject, consistency, 0);
 382     }
 383     /**
 384      * This Method performs DDL and DML operations on Cassandra using specified consistency level
 385      *
 386      * @param queryObject Object containing cassandra prepared query and values.
 387      * @param consistency Specify consistency level for data synchronization across cassandra
 388      *        replicas
 389      * @return Boolean Indicates operation success or failure
 390      * @throws MusicServiceException
 391      * @throws MusicQueryException
 392      */
 393     public boolean executePut(PreparedQueryObject queryObject, String consistency,long timeSlot)
 394                     throws MusicServiceException, MusicQueryException {
 395
 396         boolean result = false;
 397         long timeOfWrite = System.currentTimeMillis();
 398         if (!MusicUtil.isValidQueryObject(!queryObject.getValues().isEmpty(), queryObject)) {
 399             logger.error(EELFLoggerDelegate.errorLogger, queryObject.getQuery(),AppMessages.QUERYERROR, ErrorSeverity.ERROR, ErrorTypes.QUERYERROR);
 400             throw new MusicQueryException("Ill formed queryObject for the request = " + "["
 401                             + queryObject.getQuery() + "]");
 402         }
 403         logger.debug(EELFLoggerDelegate.applicationLogger,
 404                         "In preprared Execute Put: the actual insert query:"
 405                                         + queryObject.getQuery() + "; the values"
 406                                         + queryObject.getValues());
 407         SimpleStatement preparedInsert = null;
 408
 409         try {
 410             preparedInsert = new SimpleStatement(queryObject.getQuery(), queryObject.getValues().toArray());
 411             if (consistency.equalsIgnoreCase(MusicUtil.CRITICAL)) {
 412                 logger.info(EELFLoggerDelegate.applicationLogger, "Executing critical put query");
 413                 preparedInsert.setConsistencyLevel(ConsistencyLevel.QUORUM);
 414             } else if (consistency.equalsIgnoreCase(MusicUtil.EVENTUAL)) {
 415                 logger.info(EELFLoggerDelegate.applicationLogger, "Executing simple put query");
 416                 if(queryObject.getConsistency() == null)
 417                     preparedInsert.setConsistencyLevel(ConsistencyLevel.ONE);
 418                 else
 419                     preparedInsert.setConsistencyLevel(MusicUtil.getConsistencyLevel(queryObject.getConsistency()));
 420             } else if (consistency.equalsIgnoreCase(MusicUtil.ONE)) {
 421                 preparedInsert.setConsistencyLevel(ConsistencyLevel.ONE);
 422             }  else if (consistency.equalsIgnoreCase(MusicUtil.QUORUM)) {
 423                 preparedInsert.setConsistencyLevel(ConsistencyLevel.LOCAL_QUORUM);
 424             } else if (consistency.equalsIgnoreCase(MusicUtil.ALL)) {
 425                 preparedInsert.setConsistencyLevel(ConsistencyLevel.ALL);
 426             }
 427             long timestamp = MusicUtil.v2sTimeStampInMicroseconds(timeSlot, timeOfWrite);
 428             preparedInsert.setDefaultTimestamp(timestamp);
 429
 430             ResultSet rs = session.execute(preparedInsert);
 431             result = rs.wasApplied();
 432
 433         }
 434         catch (AlreadyExistsException ae) {
 435             // logger.error(EELFLoggerDelegate.errorLogger,"AlreadExistsException: " + ae.getMessage(),AppMessages.QUERYERROR,
 436             // ErrorSeverity.ERROR, ErrorTypes.QUERYERROR);
 437             throw new MusicQueryException("AlreadyExistsException: " + ae.getMessage(),ae);
 438         } catch ( InvalidQueryException e ) {
 439             // logger.error(EELFLoggerDelegate.errorLogger,"InvalidQueryException: " + e.getMessage(),AppMessages.SESSIONFAILED + " ["
 440             // + queryObject.getQuery() + "]", ErrorSeverity.ERROR, ErrorTypes.QUERYERROR);
 441             throw new MusicQueryException("InvalidQueryException: " + e.getMessage(),e);
 442         } catch (Exception e) {
 443             // logger.error(EELFLoggerDelegate.errorLogger,e.getClass().toString() + ":" + e.getMessage(),AppMessages.SESSIONFAILED + " ["
 444             //     + queryObject.getQuery() + "]", ErrorSeverity.ERROR, ErrorTypes.QUERYERROR, e);
 445             throw new MusicServiceException("Executing Session Failure for Request = " + "["
 446                 + queryObject.getQuery() + "]" + " Reason = " + e.getMessage(),e);
 447         }
 448         return result;
 449     }
 450
 451  /*   *//**
 452      * This method performs DDL operations on Cassandra using consistency level ONE.
 453      *
 454      * @param queryObject Object containing cassandra prepared query and values.
 455      * @return ResultSet
 456      * @throws MusicServiceException
 457      * @throws MusicQueryException
 458      *//*
 459     public ResultSet executeEventualGet(PreparedQueryObject queryObject)
 460                     throws MusicServiceException, MusicQueryException {
 461         CacheAccess<String, PreparedStatement> queryBank = CachingUtil.getStatementBank();
 462         PreparedStatement preparedEventualGet = null;
 463         if (!MusicUtil.isValidQueryObject(!queryObject.getValues().isEmpty(), queryObject)) {
 464             logger.error(EELFLoggerDelegate.errorLogger, "",AppMessages.QUERYERROR+ " [" + queryObject.getQuery() + "]", ErrorSeverity.ERROR, ErrorTypes.QUERYERROR);
 465             throw new MusicQueryException("Ill formed queryObject for the request = " + "["
 466                             + queryObject.getQuery() + "]");
 467         }
 468         logger.info(EELFLoggerDelegate.applicationLogger,
 469                         "Executing Eventual  get query:" + queryObject.getQuery());
 470
 471         ResultSet results = null;
 472         try {
 473             if(queryBank.get(queryObject.getQuery()) != null )
 474                 preparedEventualGet=queryBank.get(queryObject.getQuery());
 475             else {
 476                 preparedEventualGet = session.prepare(queryObject.getQuery());
 477                 CachingUtil.updateStatementBank(queryObject.getQuery(), preparedEventualGet);
 478             }
 479             if(queryObject.getConsistency() == null) {
 480                 preparedEventualGet.setConsistencyLevel(ConsistencyLevel.ONE);
 481             } else {
 482                 preparedEventualGet.setConsistencyLevel(MusicUtil.getConsistencyLevel(queryObject.getConsistency()));
 483             }
 484             results = session.execute(preparedEventualGet.bind(queryObject.getValues().toArray()));
 485
 486         } catch (Exception ex) {
 487             logger.error("Exception", ex);
 488             logger.error(EELFLoggerDelegate.errorLogger, ex.getMessage(),AppMessages.UNKNOWNERROR+ "[" + queryObject.getQuery() + "]", ErrorSeverity.ERROR, ErrorTypes.QUERYERROR);
 489             throw new MusicServiceException(ex.getMessage());
 490         }
 491         return results;
 492     }
 493
 494     *//**
 495      *
 496      * This method performs DDL operation on Cassandra using consistency level QUORUM.
 497      *
 498      * @param queryObject Object containing cassandra prepared query and values.
 499      * @return ResultSet
 500      * @throws MusicServiceException
 501      * @throws MusicQueryException
 502      *//*
 503     public ResultSet executeCriticalGet(PreparedQueryObject queryObject)
 504                     throws MusicServiceException, MusicQueryException {
 505         if (!MusicUtil.isValidQueryObject(!queryObject.getValues().isEmpty(), queryObject)) {
 506             logger.error(EELFLoggerDelegate.errorLogger, "",AppMessages.QUERYERROR+ " [" + queryObject.getQuery() + "]", ErrorSeverity.ERROR, ErrorTypes.QUERYERROR);
 507             throw new MusicQueryException("Error processing Prepared Query Object for the request = " + "["
 508                             + queryObject.getQuery() + "]");
 509         }
 510         logger.info(EELFLoggerDelegate.applicationLogger,
 511                         "Executing Critical get query:" + queryObject.getQuery());
 512         PreparedStatement preparedEventualGet = session.prepare(queryObject.getQuery());
 513         preparedEventualGet.setConsistencyLevel(ConsistencyLevel.QUORUM);
 514         ResultSet results = null;
 515         try {
 516             results = session.execute(preparedEventualGet.bind(queryObject.getValues().toArray()));
 517         } catch (Exception ex) {
 518             logger.error("Exception", ex);
 519             logger.error(EELFLoggerDelegate.errorLogger, ex.getMessage(),AppMessages.UNKNOWNERROR+ "[" + queryObject.getQuery() + "]", ErrorSeverity.ERROR, ErrorTypes.QUERYERROR);
 520             throw new MusicServiceException(ex.getMessage());
 521         }
 522         return results;
 523
 524     }
 525     */
 526     public ResultSet executeGet(PreparedQueryObject queryObject,String consistencyLevel) throws MusicQueryException, MusicServiceException {
 527         if (!MusicUtil.isValidQueryObject(!queryObject.getValues().isEmpty(), queryObject)) {
 528             logger.error(EELFLoggerDelegate.errorLogger, "",AppMessages.QUERYERROR+ " [" + queryObject.getQuery() + "]", ErrorSeverity.ERROR, ErrorTypes.QUERYERROR);
 529             throw new MusicQueryException("Error processing Prepared Query Object for the request = " + "["
 530                             + queryObject.getQuery() + "]");
 531         }
 532         ResultSet results = null;
 533         try {
 534             SimpleStatement statement = new SimpleStatement(queryObject.getQuery(), queryObject.getValues().toArray());
 535
 536             if (consistencyLevel.equalsIgnoreCase(CONSISTENCY_LEVEL_ONE)) {
 537                 if(queryObject.getConsistency() == null) {
 538                     statement.setConsistencyLevel(ConsistencyLevel.ONE);
 539                 } else {
 540                     statement.setConsistencyLevel(MusicUtil.getConsistencyLevel(queryObject.getConsistency()));
 541                 }
 542             }
 543             else if (consistencyLevel.equalsIgnoreCase(CONSISTENCY_LEVEL_QUORUM)) {
 544                 statement.setConsistencyLevel(ConsistencyLevel.QUORUM);
 545             }
 546
 547             results = session.execute(statement);
 548
 549         } catch (Exception ex) {
 550             logger.error(EELFLoggerDelegate.errorLogger, "Execute Get Error" + ex.getMessage(),AppMessages.UNKNOWNERROR+ "[" + queryObject
 551                 .getQuery() + "]", ErrorSeverity.ERROR, ErrorTypes.QUERYERROR, ex);
 552             throw new MusicServiceException("Execute Get Error" + ex.getMessage());
 553         }
 554
 555         return results;
 556
 557     }
 558
 559     /**
 560      * This method performs DDL operations on Cassandra using consistency level ONE.
 561      *
 562      * @param queryObject Object containing cassandra prepared query and values.
 563      */
 564     public ResultSet executeOneConsistencyGet(PreparedQueryObject queryObject)
 565                     throws MusicServiceException, MusicQueryException {
 566         return executeGet(queryObject, CONSISTENCY_LEVEL_ONE);
 567     }
 568
 569     /**
 570      *
 571      * This method performs DDL operation on Cassandra using consistency level QUORUM.
 572      *
 573      * @param queryObject Object containing cassandra prepared query and values.
 574      */
 575     public ResultSet executeQuorumConsistencyGet(PreparedQueryObject queryObject)
 576                     throws MusicServiceException, MusicQueryException {
 577         return executeGet(queryObject, CONSISTENCY_LEVEL_QUORUM);
 578     }
 579
 580 }