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   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   * <p/>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p/>
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
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  package org.apache.atlas.repository.audit;
  
  import com.datastax.driver.core.Cluster;
  import com.datastax.driver.core.Session;
  import org.apache.commons.configuration.Configuration;
  import org.apache.commons.configuration.MapConfiguration;
  import org.cassandraunit.utils.EmbeddedCassandraServerHelper;
  import org.testng.SkipException;
  import org.testng.annotations.BeforeClass;
  
  import java.util.HashMap;
  import java.util.Map;
  
  public class CassandraAuditRepositoryTest extends AuditRepositoryTestBase {
      private static final int    MAX_RETRIES       = 9;
      private static final String CLUSTER_HOST      = "localhost";
      private static final String CLUSTER_NAME_TEST = "Test Cluster";
      private static final int    CLUSTER_PORT      = 9042;
      private static final String CLUSTER_USERNAME  = "";
      private static final String CLUSTER_PASSWORD  = "";
  
      @BeforeClass
      public void setup() {
          try {
              EmbeddedCassandraServerHelper.startEmbeddedCassandra("cassandra_test.yml");
  
              eventRepository = new CassandraBasedAuditRepository();
  
              Configuration atlasConf = new MapConfiguration(getClusterProperties());
  
              ((CassandraBasedAuditRepository) eventRepository).setApplicationProperties(atlasConf);
              ((CassandraBasedAuditRepository) eventRepository).start();
  
              ensureClusterCreation();
          } catch (Exception ex) {
              throw new SkipException("setup: failed!", ex);
          }
      }
  
      private Map<String, Object> getClusterProperties() {
          Map<String, Object> props = new HashMap<>();
  
          props.put(CassandraBasedAuditRepository.MANAGE_EMBEDDED_CASSANDRA, Boolean.TRUE);
          props.put(CassandraBasedAuditRepository.CASSANDRA_CLUSTERNAME_PROPERTY, CLUSTER_NAME_TEST);
          props.put(CassandraBasedAuditRepository.CASSANDRA_HOSTNAME_PROPERTY, CLUSTER_HOST);
          props.put(CassandraBasedAuditRepository.CASSANDRA_PORT_PROPERTY, CLUSTER_PORT);
          props.put(CassandraBasedAuditRepository.CASSANDRA_USERNAME_PROPERTY, CLUSTER_USERNAME);
          props.put(CassandraBasedAuditRepository.CASSANDRA_PASSWORD_PROPERTY, CLUSTER_PASSWORD);
  
          return props;
      }
  
      private void ensureClusterCreation() throws InterruptedException {
          // Retry the connection until we either connect or timeout
          Cluster.Builder cassandraClusterBuilder = Cluster.builder();
          Cluster         cluster                 = cassandraClusterBuilder.addContactPoint(CLUSTER_HOST)
                  .withClusterName(CLUSTER_NAME_TEST).withPort(CLUSTER_PORT)
                  .withCredentials(CLUSTER_USERNAME.trim(), CLUSTER_PASSWORD.trim()).build();
  
          for (int retryCount = 0; retryCount < MAX_RETRIES; retryCount++) {
              try {
                  Session cassSession = cluster.connect();
  
                  if (!cassSession.getState().getConnectedHosts().isEmpty()) {
                      cassSession.close();
                      return;
                  }
              } catch (Exception e) {
                  Thread.sleep(1000);
              }
          }
  
          throw new SkipException("Unable to connect to embedded Cassandra after " + MAX_RETRIES + " seconds.");
      }
  }
  