gerrit.onap Code Review - sdc.git/blob

   1 /*
   2  * Copyright © 2016-2017 European Support Limited
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package org.openecomp.core.nosqldb.impl.cassandra;
  18
  19 import com.datastax.driver.core.Cluster;
  20 import com.datastax.driver.core.ConsistencyLevel;
  21 import com.datastax.driver.core.QueryOptions;
  22 import com.datastax.driver.core.SSLOptions;
  23 import com.datastax.driver.core.Session;
  24 import com.datastax.driver.core.policies.DCAwareRoundRobinPolicy;
  25 import com.datastax.driver.core.policies.LoadBalancingPolicy;
  26 import com.datastax.driver.core.policies.TokenAwarePolicy;
  27 import org.openecomp.core.nosqldb.util.CassandraUtils;
  28 import org.openecomp.sdc.common.errors.SdcConfigurationException;
  29 import org.openecomp.sdc.logging.api.Logger;
  30 import org.openecomp.sdc.logging.api.LoggerFactory;
  31
  32 import javax.net.ssl.SSLContext;
  33 import javax.net.ssl.TrustManagerFactory;
  34 import java.io.FileInputStream;
  35 import java.security.KeyStore;
  36 import java.security.SecureRandom;
  37 import java.util.Objects;
  38 import java.util.Optional;
  39
  40 public class CassandraSessionFactory {
  41
  42     private static final Logger LOGGER = LoggerFactory.getLogger(CassandraSessionFactory.class);
  43
  44     private CassandraSessionFactory() {
  45         // static methods, cannot be instantiated
  46     }
  47
  48     public static Session getSession() {
  49         return ReferenceHolder.CASSANDRA;
  50     }
  51
  52     /**
  53      * New cassandra session session.
  54      *
  55      * @return the session
  56      */
  57     public static Session newCassandraSession() {
  58         Cluster.Builder builder = Cluster.builder();
  59         String[] addresses = CassandraUtils.getAddresses();
  60         for (String address : addresses) {
  61             builder.addContactPoint(address);
  62         }
  63
  64         //Check if ssl
  65         Boolean isSsl = CassandraUtils.isSsl();
  66         if (isSsl) {
  67             builder.withSSL(getSslOptions());
  68         }
  69         int port = CassandraUtils.getCassandraPort();
  70         if (port > 0) {
  71             builder.withPort(port);
  72         }
  73         //Check if user/pass
  74         Boolean isAuthenticate = CassandraUtils.isAuthenticate();
  75         if (isAuthenticate) {
  76             builder.withCredentials(CassandraUtils.getUser(), CassandraUtils.getPassword());
  77         }
  78
  79         setConsistencyLevel(builder, addresses);
  80
  81         setLocalDataCenter(builder);
  82
  83
  84         Cluster cluster = builder.build();
  85         String keyStore = CassandraUtils.getKeySpace();
  86         return cluster.connect(keyStore);
  87     }
  88
  89     private static void setLocalDataCenter(Cluster.Builder builder) {
  90         String localDataCenter = CassandraUtils.getLocalDataCenter();
  91         if (Objects.nonNull(localDataCenter)) {
  92             LOGGER.info("localDatacenter was provided, setting Cassndra client to use datacenter: {} as " +
  93                     "local.", localDataCenter);
  94
  95             LoadBalancingPolicy tokenAwarePolicy = new TokenAwarePolicy(
  96                     DCAwareRoundRobinPolicy.builder().withLocalDc(localDataCenter).build());
  97             builder.withLoadBalancingPolicy(tokenAwarePolicy);
  98         } else {
  99             LOGGER.info(
 100                     "localDatacenter was provided,  the driver will use the datacenter of the first contact " +
 101                             "point that was reached at initialization");
 102         }
 103     }
 104
 105     private static void setConsistencyLevel(Cluster.Builder builder, String[] addresses) {
 106         if (addresses != null && addresses.length > 1) {
 107             String consistencyLevel = CassandraUtils.getConsistencyLevel();
 108             if (Objects.nonNull(consistencyLevel)) {
 109                 LOGGER.info(
 110                         "consistencyLevel was provided, setting Cassandra client to use consistencyLevel: {}" +
 111                                 " as "
 112                         , consistencyLevel);
 113                 builder.withQueryOptions(new QueryOptions().setConsistencyLevel(ConsistencyLevel.valueOf
 114                         (consistencyLevel)));
 115             }
 116         }
 117     }
 118
 119     private static SSLOptions getSslOptions() {
 120
 121         Optional<String> trustStorePath = Optional.ofNullable(CassandraUtils.getTruststore());
 122         if (!trustStorePath.isPresent()) {
 123             throw new SdcConfigurationException("Missing configuration for Cassandra trustStorePath");
 124         }
 125
 126         Optional<String> trustStorePassword = Optional.ofNullable(CassandraUtils.getTruststorePassword());
 127         if (!trustStorePassword.isPresent()) {
 128             throw new SdcConfigurationException("Missing configuration for Cassandra trustStorePassword");
 129         }
 130
 131         SSLContext context = getSslContext(trustStorePath.get(), trustStorePassword.get());
 132         String[] css = new String[]{"TLS_RSA_WITH_AES_128_CBC_SHA"};
 133         return new SSLOptions(context, css);
 134     }
 135
 136     private static SSLContext getSslContext(String truststorePath, String trustStorePassword) {
 137
 138         try (FileInputStream tsf = new FileInputStream(truststorePath)) {
 139
 140             SSLContext ctx = SSLContext.getInstance("SSL");
 141
 142             KeyStore ts = KeyStore.getInstance("JKS");
 143             ts.load(tsf, trustStorePassword.toCharArray());
 144             TrustManagerFactory tmf =
 145                     TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
 146             tmf.init(ts);
 147
 148             ctx.init(null, tmf.getTrustManagers(), new SecureRandom());
 149             return ctx;
 150
 151         } catch (Exception exception) {
 152             throw new SdcConfigurationException("Failed to get SSL Contexts for Cassandra connection", exception);
 153         }
 154     }
 155
 156     private static class ReferenceHolder {
 157
 158         private ReferenceHolder() {
 159             // prevent instantiation
 160         }
 161
 162         private static final Session CASSANDRA = newCassandraSession();
 163     }
 164
 165
 166 }