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.policies.DCAwareRoundRobinPolicy;
  20 import com.datastax.driver.core.policies.LoadBalancingPolicy;
  21 import com.datastax.driver.core.policies.TokenAwarePolicy;
  22 import com.datastax.driver.core.Cluster;
  23 import com.datastax.driver.core.ConsistencyLevel;
  24 import com.datastax.driver.core.QueryOptions;
  25 import com.datastax.driver.core.RemoteEndpointAwareJdkSSLOptions;
  26 import com.datastax.driver.core.SSLOptions;
  27 import com.datastax.driver.core.Session;
  28
  29
  30 import org.openecomp.core.nosqldb.util.CassandraUtils;
  31 import org.openecomp.sdc.common.errors.SdcConfigurationException;
  32 import org.openecomp.sdc.common.session.SessionContextProviderFactory;
  33 import org.openecomp.sdc.logging.api.Logger;
  34 import org.openecomp.sdc.logging.api.LoggerFactory;
  35
  36 import javax.net.ssl.SSLContext;
  37 import javax.net.ssl.TrustManagerFactory;
  38 import java.io.FileInputStream;
  39 import java.security.KeyStore;
  40 import java.security.SecureRandom;
  41 import java.util.Objects;
  42 import java.util.Optional;
  43
  44 public class CassandraSessionFactory {
  45
  46     private static final Logger LOGGER = LoggerFactory.getLogger(CassandraSessionFactory.class);
  47
  48     private CassandraSessionFactory() {
  49         // static methods, cannot be instantiated
  50     }
  51
  52     public static Session getSession() {
  53         return ReferenceHolder.CASSANDRA;
  54     }
  55
  56     /**
  57      * New cassandra session session.
  58      *
  59      * @return the session
  60      */
  61     public static Session newCassandraSession() {
  62         Cluster.Builder builder = Cluster.builder();
  63         String[] addresses = CassandraUtils.getAddresses();
  64         for (String address : addresses) {
  65             builder.addContactPoint(address);
  66         }
  67
  68         //Check if ssl
  69         Boolean isSsl = CassandraUtils.isSsl();
  70         if (isSsl) {
  71             builder.withSSL(getSslOptions());
  72         }
  73         int port = CassandraUtils.getCassandraPort();
  74         if (port > 0) {
  75             builder.withPort(port);
  76         }
  77         //Check if user/pass
  78         Boolean isAuthenticate = CassandraUtils.isAuthenticate();
  79         if (isAuthenticate) {
  80             builder.withCredentials(CassandraUtils.getUser(), CassandraUtils.getPassword());
  81         }
  82
  83         setConsistencyLevel(builder, addresses);
  84
  85         setLocalDataCenter(builder);
  86
  87
  88         Cluster cluster = builder.build();
  89         String keyStore = SessionContextProviderFactory.getInstance().createInterface().get()
  90             .getTenant();
  91         return cluster.connect(keyStore);
  92     }
  93
  94     private static void setLocalDataCenter(Cluster.Builder builder) {
  95         String localDataCenter = CassandraUtils.getLocalDataCenter();
  96         if (Objects.nonNull(localDataCenter)) {
  97             LOGGER.info("localDatacenter was provided, setting Cassndra client to use datacenter: {} as " +
  98                     "local.", localDataCenter);
  99
 100             LoadBalancingPolicy tokenAwarePolicy = new TokenAwarePolicy(
 101                     DCAwareRoundRobinPolicy.builder().withLocalDc(localDataCenter).build());
 102             builder.withLoadBalancingPolicy(tokenAwarePolicy);
 103         } else {
 104             LOGGER.info(
 105                     "localDatacenter was provided,  the driver will use the datacenter of the first contact " +
 106                             "point that was reached at initialization");
 107         }
 108     }
 109
 110     private static void setConsistencyLevel(Cluster.Builder builder, String[] addresses) {
 111         if (addresses != null && addresses.length > 1) {
 112             String consistencyLevel = CassandraUtils.getConsistencyLevel();
 113             if (Objects.nonNull(consistencyLevel)) {
 114                 LOGGER.info(
 115                         "consistencyLevel was provided, setting Cassandra client to use consistencyLevel: {}" +
 116                                 " as "
 117                         , consistencyLevel);
 118                 builder.withQueryOptions(new QueryOptions().setConsistencyLevel(ConsistencyLevel.valueOf
 119                         (consistencyLevel)));
 120             }
 121         }
 122     }
 123
 124     private static SSLOptions getSslOptions() {
 125
 126         Optional<String> trustStorePath = Optional.ofNullable(CassandraUtils.getTruststore());
 127         if (!trustStorePath.isPresent()) {
 128             throw new SdcConfigurationException("Missing configuration for Cassandra trustStorePath");
 129         }
 130
 131         Optional<String> trustStorePassword = Optional.ofNullable(CassandraUtils.getTruststorePassword());
 132         if (!trustStorePassword.isPresent()) {
 133             throw new SdcConfigurationException("Missing configuration for Cassandra trustStorePassword");
 134         }
 135
 136         SSLContext context = getSslContext(trustStorePath.get(), trustStorePassword.get());
 137         String[] css = new String[]{"TLS_RSA_WITH_AES_128_CBC_SHA"};
 138         return RemoteEndpointAwareJdkSSLOptions.builder().withSSLContext(context).withCipherSuites(css).build();
 139     }
 140
 141     private static SSLContext getSslContext(String truststorePath, String trustStorePassword) {
 142
 143         try (FileInputStream tsf = new FileInputStream(truststorePath)) {
 144
 145             SSLContext ctx = SSLContext.getInstance("SSL");
 146
 147             KeyStore ts = KeyStore.getInstance("JKS");
 148             ts.load(tsf, trustStorePassword.toCharArray());
 149             TrustManagerFactory tmf =
 150                     TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
 151             tmf.init(ts);
 152
 153             ctx.init(null, tmf.getTrustManagers(), new SecureRandom());
 154             return ctx;
 155
 156         } catch (Exception exception) {
 157             throw new SdcConfigurationException("Failed to get SSL Contexts for Cassandra connection", exception);
 158         }
 159     }
 160
 161     private static class ReferenceHolder {
 162         private static final Session CASSANDRA = newCassandraSession();
 163
 164         private ReferenceHolder() {
 165             // prevent instantiation
 166         }
 167     }
 168
 169
 170 }