catalog-dao/src/main/java/org/openecomp/sdc/be/dao/cassandra/CassandraClient.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * SDC
   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
  21 package org.openecomp.sdc.be.dao.cassandra;
  22
  23 import java.util.List;
  24
  25 import javax.annotation.PreDestroy;
  26
  27 import com.datastax.driver.core.policies.*;
  28 import org.apache.commons.lang3.tuple.ImmutablePair;
  29 import org.openecomp.sdc.be.config.ConfigurationManager;
  30 import org.slf4j.Logger;
  31 import org.slf4j.LoggerFactory;
  32 import org.springframework.stereotype.Component;
  33
  34 import com.datastax.driver.core.Cluster;
  35 import com.datastax.driver.core.Session;
  36 import com.datastax.driver.mapping.Mapper;
  37 import com.datastax.driver.mapping.MappingManager;
  38
  39 import fj.data.Either;
  40
  41 @Component("cassandra-client")
  42 public class CassandraClient {
  43         private static Logger logger = LoggerFactory.getLogger(CassandraClient.class.getName());
  44
  45         private Cluster cluster;
  46         private boolean isConnected;
  47
  48         public CassandraClient() {
  49                 super();
  50                 isConnected = false;
  51                 List<String> cassandraHosts = null;
  52                 try {
  53                         cassandraHosts = ConfigurationManager.getConfigurationManager().getConfiguration().getCassandraConfig()
  54                                         .getCassandraHosts();
  55                         Long reconnectTimeout = ConfigurationManager.getConfigurationManager().getConfiguration()
  56                                         .getCassandraConfig().getReconnectTimeout();
  57
  58                         logger.debug("creating cluster to hosts:{} with reconnect timeout:{}", cassandraHosts, reconnectTimeout);
  59                         Cluster.Builder clusterBuilder = Cluster.builder()
  60                                         .withReconnectionPolicy(new ConstantReconnectionPolicy(reconnectTimeout))
  61                                         .withRetryPolicy(DefaultRetryPolicy.INSTANCE);
  62
  63                         cassandraHosts.forEach(host -> clusterBuilder.addContactPoint(host));
  64                         enableAuthentication(clusterBuilder);
  65                         enableSsl(clusterBuilder);
  66                         setLocalDc(clusterBuilder);
  67
  68                         cluster = clusterBuilder.build();
  69                         isConnected = true;
  70                 } catch (Exception e) {
  71                         logger.info("** CassandraClient isn't connected to {}", cassandraHosts);
  72                 }
  73
  74                 logger.info("** CassandraClient created");
  75         }
  76
  77         private void setLocalDc(Cluster.Builder clusterBuilder) {
  78                 String localDataCenter = ConfigurationManager.getConfigurationManager().getConfiguration().getCassandraConfig()
  79                                 .getLocalDataCenter();
  80                 if (localDataCenter != null) {
  81                         logger.info("localDatacenter was provided, setting Cassndra clint to use datacenter: {} as local.",
  82                                         localDataCenter);
  83                         LoadBalancingPolicy tokenAwarePolicy = new TokenAwarePolicy(
  84                                         DCAwareRoundRobinPolicy.builder().withLocalDc(localDataCenter).build());
  85                         clusterBuilder.withLoadBalancingPolicy(tokenAwarePolicy);
  86                 } else {
  87                         logger.info(
  88                                         "localDatacenter was provided,  the driver will use the datacenter of the first contact point that was reached at initialization");
  89                 }
  90         }
  91
  92         private void enableSsl(Cluster.Builder clusterBuilder) {
  93                 boolean ssl = ConfigurationManager.getConfigurationManager().getConfiguration().getCassandraConfig().isSsl();
  94                 if (ssl) {
  95                         String truststorePath = ConfigurationManager.getConfigurationManager().getConfiguration()
  96                                         .getCassandraConfig().getTruststorePath();
  97                         String truststorePassword = ConfigurationManager.getConfigurationManager().getConfiguration()
  98                                         .getCassandraConfig().getTruststorePassword();
  99                         if (truststorePath == null || truststorePassword == null) {
 100                                 logger.error("ssl is enabled but truststorePath or truststorePassword were not supplied.");
 101                         } else {
 102                                 System.setProperty("javax.net.ssl.trustStore", truststorePath);
 103                                 System.setProperty("javax.net.ssl.trustStorePassword", truststorePassword);
 104                                 clusterBuilder.withSSL();
 105                         }
 106
 107                 }
 108         }
 109
 110         private void enableAuthentication(Cluster.Builder clusterBuilder) {
 111                 boolean authenticate = ConfigurationManager.getConfigurationManager().getConfiguration().getCassandraConfig()
 112                                 .isAuthenticate();
 113                 if (authenticate) {
 114                         String username = ConfigurationManager.getConfigurationManager().getConfiguration().getCassandraConfig()
 115                                         .getUsername();
 116                         String password = ConfigurationManager.getConfigurationManager().getConfiguration().getCassandraConfig()
 117                                         .getPassword();
 118                         if (username == null || password == null) {
 119                                 logger.error("authentication is enabled but username or password were not supplied.");
 120                         } else {
 121                                 clusterBuilder.withCredentials(username, password);
 122                         }
 123
 124                 }
 125         }
 126
 127         /**
 128          *
 129          * @param keyspace
 130          *            - key space to connect
 131          * @return
 132          */
 133         public Either<ImmutablePair<Session, MappingManager>, CassandraOperationStatus> connect(String keyspace) {
 134                 if (cluster != null) {
 135                         try {
 136                                 Session session = cluster.connect(keyspace);
 137                                 if (session != null) {
 138                                         MappingManager manager = new MappingManager(session);
 139                                         return Either.left(new ImmutablePair<Session, MappingManager>(session, manager));
 140                                 } else {
 141                                         return Either.right(CassandraOperationStatus.KEYSPACE_NOT_CONNECTED);
 142                                 }
 143                         } catch (Throwable e) {
 144                                 logger.debug("Failed to connect to keyspace [{}], error :", keyspace, e);
 145                                 return Either.right(CassandraOperationStatus.KEYSPACE_NOT_CONNECTED);
 146                         }
 147                 }
 148                 return Either.right(CassandraOperationStatus.CLUSTER_NOT_CONNECTED);
 149         }
 150
 151         public <T> CassandraOperationStatus save(T entity, Class<T> clazz, MappingManager manager) {
 152                 if (!isConnected) {
 153                         return CassandraOperationStatus.CLUSTER_NOT_CONNECTED;
 154                 }
 155                 try {
 156                         Mapper<T> mapper = manager.mapper(clazz);
 157                         mapper.save(entity);
 158                 } catch (Exception e) {
 159                         logger.debug("Failed to save entity [{}], error :", entity, e);
 160                         return CassandraOperationStatus.GENERAL_ERROR;
 161                 }
 162                 return CassandraOperationStatus.OK;
 163         }
 164
 165         public <T> Either<T, CassandraOperationStatus> getById(String id, Class<T> clazz, MappingManager manager) {
 166                 if (!isConnected) {
 167                         return Either.right(CassandraOperationStatus.CLUSTER_NOT_CONNECTED);
 168                 }
 169                 try {
 170                         Mapper<T> mapper = manager.mapper(clazz);
 171                         T result = mapper.get(id);
 172                         if (result == null) {
 173                                 return Either.right(CassandraOperationStatus.NOT_FOUND);
 174                         }
 175                         return Either.left(result);
 176                 } catch (Exception e) {
 177                         logger.debug("Failed to get by Id [{}], error :", id, e);
 178                         return Either.right(CassandraOperationStatus.GENERAL_ERROR);
 179                 }
 180         }
 181
 182         public <T> CassandraOperationStatus delete(String id, Class<T> clazz, MappingManager manager) {
 183                 if (!isConnected) {
 184                         return CassandraOperationStatus.CLUSTER_NOT_CONNECTED;
 185                 }
 186                 try {
 187                         Mapper<T> mapper = manager.mapper(clazz);
 188                         mapper.delete(id);
 189                 } catch (Exception e) {
 190                         logger.debug("Failed to delete by id [{}], error :", id, e);
 191                         return CassandraOperationStatus.GENERAL_ERROR;
 192                 }
 193                 return CassandraOperationStatus.OK;
 194         }
 195
 196         public boolean isConnected() {
 197                 return isConnected;
 198         }
 199
 200         @PreDestroy
 201         public void closeClient() {
 202                 if (isConnected) {
 203                         cluster.close();
 204                 }
 205                 logger.info("** CassandraClient cluster closed");
 206         }
 207 }