content: /*
   * 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
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * 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.
   */
  
  package org.apache.cassandra.db.virtual;
  
  import java.io.IOException;
  import java.net.InetAddress;
  import java.util.List;
  
  import com.google.common.collect.ImmutableList;
  import org.junit.AfterClass;
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import com.datastax.driver.core.Cluster;
  import com.datastax.driver.core.Row;
  import com.datastax.driver.core.Session;
  import org.apache.cassandra.ServerTestUtils;
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.service.EmbeddedCassandraService;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotEquals;
  import static org.junit.Assert.assertNotNull;
  import static org.junit.Assert.assertNull;
  import static org.junit.Assert.assertTrue;
  
  public class ClientsTableKeyspaceColTest
  {
  
      private static Cluster cluster;
      private static EmbeddedCassandraService cassandra;
      private static final String KS_NAME = "vts";
  
      @BeforeClass
      public static void setupClass() throws IOException
      {
          cassandra = ServerTestUtils.startEmbeddedCassandraService();
  
          cluster = Cluster.builder().addContactPoint("127.0.0.1")
                           .withPort(DatabaseDescriptor.getNativeTransportPort())
                           .build();
  
          ClientsTable table = new ClientsTable(KS_NAME);
          VirtualKeyspaceRegistry.instance.register(new VirtualKeyspace(KS_NAME, ImmutableList.of(table)));
      }
  
      @AfterClass
      public static void tearDown()
      {
          try
          {
              if (cluster != null)
                  cluster.close();
          }
          finally
          {
              if (cassandra != null)
                  cassandra.stop();
          }
      }
  
      @Test
      public void testWithoutConnectingToKeyspace()
      {
          try (Session session = cluster.connect())
          {
              List<Row> rows = session.execute("SELECT * from " + KS_NAME + ".clients").all();
              assertTrue("At least one client should be returned.", rows.size() > 0);
              for (Row r : rows)
                  assertNull(r.getString("keyspace_name")); // No keyspace is specifed while connecting. It should be null.
          }
      }
  
      @Test
      public void testChangingKeyspace()
      {
          String keyspace1 = "system_distributed";
          String keyspace2 = "system_auth";
          try (Session session = cluster.connect(keyspace1))
          {
  
              InetAddress poolConnection = null;
              int port = -1;
              for (Row r : session.execute("SELECT * from " + KS_NAME + ".clients").all())
              {
                  // Keyspace is used for pool connection only (control connection is not using keyspace).
                  // Using r["keyspace_name"] == keyspace1 as a hint to identify a pool connection as we can't identify
                  // control connection based on information in this table.
                  String keyspace = r.getString("keyspace_name");
                  if (keyspace1.equals(keyspace))
                  {
                      poolConnection = r.getInet("address");
                      port = r.getInt("port");
                      break;
                  }
              }
  
              assertNotEquals(-1, port);
              assertNotNull(poolConnection);
  
              session.execute("USE " + keyspace2);
  
              String usedKeyspace = null;
              for (Row r : session.execute("SELECT * from " + KS_NAME + ".clients").all())
              {
                  if (poolConnection.equals(r.getInet("address")) && port == r.getInt("port"))
                  {
                      usedKeyspace = r.getString("keyspace_name");
                      break;
                  }
              }
  
              assertEquals(keyspace2, usedKeyspace);
          }
      }
  }
  