openecomp-be/lib/openecomp-core-lib/openecomp-nosqldb-lib/openecomp-nosqldb-core/src/main/java/org/openecomp/core/nosqldb/impl/cassandra/CassandraSessionFactory.java

   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.common.session.SessionContextProviderFactory;
  30 import org.openecomp.sdc.logging.api.Logger;
  31 import org.openecomp.sdc.logging.api.LoggerFactory;
  32
  33 import javax.net.ssl.SSLContext;
  34 import javax.net.ssl.TrustManagerFactory;
  35 import java.io.FileInputStream;
  36 import java.security.KeyStore;
  37 import java.security.SecureRandom;
  38 import java.util.Objects;
  39 import java.util.Optional;
  40
  41 public class CassandraSessionFactory {
  42
  43     private static final Logger LOGGER = LoggerFactory.getLogger(CassandraSessionFactory.class);
  44
  45     private CassandraSessionFactory() {
  46         // static methods, cannot be instantiated
  47     }
  48
  49     public static Session getSession() {
  50         return ReferenceHolder.CASSANDRA;
  51     }
  52
  53     /**
  54      * New cassandra session session.
  55      *
  56      * @return the session
  57      */
  58     public static Session newCassandraSession() {
  59         Cluster.Builder builder = Cluster.builder();
  60         String[] addresses = CassandraUtils.getAddresses();
  61         for (String address : addresses) {
  62             builder.addContactPoint(address);
  63         }
  64
  65         //Check if ssl
  66         Boolean isSsl = CassandraUtils.isSsl();
  67         if (isSsl) {
  68             builder.withSSL(getSslOptions());
  69         }
  70         int port = CassandraUtils.getCassandraPort();
  71         if (port > 0) {
  72             builder.withPort(port);
  73         }
  74         //Check if user/pass
  75         Boolean isAuthenticate = CassandraUtils.isAuthenticate();
  76         if (isAuthenticate) {
  77             builder.withCredentials(CassandraUtils.getUser(), CassandraUtils.getPassword());
  78         }
  79
  80         setConsistencyLevel(builder, addresses);
  81
  82         setLocalDataCenter(builder);
  83
  84
  85         Cluster cluster = builder.build();
  86         String keyStore = SessionContextProviderFactory.getInstance().createInterface().get()
  87             .getTenant();
  88         return cluster.connect(keyStore);
  89     }
  90
  91     private static void setLocalDataCenter(Cluster.Builder builder) {
  92         String localDataCenter = CassandraUtils.getLocalDataCenter();
  93         if (Objects.nonNull(localDataCenter)) {
  94             LOGGER.info("localDatacenter was provided, setting Cassndra client to use datacenter: {} as " +
  95                     "local.", localDataCenter);
  96
  97             LoadBalancingPolicy tokenAwarePolicy = new TokenAwarePolicy(
  98                     DCAwareRoundRobinPolicy.builder().withLocalDc(localDataCenter).build());
  99             builder.withLoadBalancingPolicy(tokenAwarePolicy);
 100         } else {
 101             LOGGER.info(
 102                     "localDatacenter was provided,  the driver will use the datacenter of the first contact " +
 103                             "point that was reached at initialization");
 104         }
 105     }
 106
 107     private static void setConsistencyLevel(Cluster.Builder builder, String[] addresses) {
 108         if (addresses != null && addresses.length > 1) {
 109             String consistencyLevel = CassandraUtils.getConsistencyLevel();
 110             if (Objects.nonNull(consistencyLevel)) {
 111                 LOGGER.info(
 112                         "consistencyLevel was provided, setting Cassandra client to use consistencyLevel: {}" +
 113                                 " as "
 114                         , consistencyLevel);
 115                 builder.withQueryOptions(new QueryOptions().setConsistencyLevel(ConsistencyLevel.valueOf
 116                         (consistencyLevel)));
 117             }
 118         }
 119     }
 120
 121     private static SSLOptions getSslOptions() {
 122
 123         Optional<String> trustStorePath = Optional.ofNullable(CassandraUtils.getTruststore());
 124         if (!trustStorePath.isPresent()) {
 125             throw new SdcConfigurationException("Missing configuration for Cassandra trustStorePath");
 126         }
 127
 128         Optional<String> trustStorePassword = Optional.ofNullable(CassandraUtils.getTruststorePassword());
 129         if (!trustStorePassword.isPresent()) {
 130             throw new SdcConfigurationException("Missing configuration for Cassandra trustStorePassword");
 131         }
 132
 133         SSLContext context = getSslContext(trustStorePath.get(), trustStorePassword.get());
 134         String[] css = new String[]{"TLS_RSA_WITH_AES_128_CBC_SHA"};
 135         return new SSLOptions(context, css);
 136     }
 137
 138     private static SSLContext getSslContext(String truststorePath, String trustStorePassword) {
 139
 140         try (FileInputStream tsf = new FileInputStream(truststorePath)) {
 141
 142             SSLContext ctx = SSLContext.getInstance("SSL");
 143
 144             KeyStore ts = KeyStore.getInstance("JKS");
 145             ts.load(tsf, trustStorePassword.toCharArray());
 146             TrustManagerFactory tmf =
 147                     TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
 148             tmf.init(ts);
 149
 150             ctx.init(null, tmf.getTrustManagers(), new SecureRandom());
 151             return ctx;
 152
 153         } catch (Exception exception) {
 154             throw new SdcConfigurationException("Failed to get SSL Contexts for Cassandra connection", exception);
 155         }
 156     }
 157
 158     private static class ReferenceHolder {
 159         private static final Session CASSANDRA = newCassandraSession();
 160
 161         private ReferenceHolder() {
 162             // prevent instantiation
 163         }
 164     }
 165
 166
 167 }