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.distributed.test;
  
  import java.io.IOException;
  import java.util.HashSet;
  import java.util.Set;
  
  import com.google.common.collect.ImmutableSet;
  import org.junit.AfterClass;
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.cql3.QueryProcessor;
  import org.apache.cassandra.cql3.UntypedResultSet;
  import org.apache.cassandra.distributed.Cluster;
  import org.apache.cassandra.distributed.api.ConsistencyLevel;
  import org.apache.cassandra.distributed.api.Feature;
  import org.apache.cassandra.gms.Gossiper;
  import org.apache.cassandra.locator.InetAddressAndPort;
  
  import static org.apache.cassandra.distributed.util.QueryResultUtil.assertThat;
  import static org.assertj.core.api.Assertions.assertThat;
  
  public class VirtualTableFromInternodeTest extends TestBaseImpl
  {
      private static Cluster CLUSTER;
  
      @BeforeClass
      public static void setup() throws IOException
      {
          CLUSTER = Cluster.build(2)
                           .withConfig(c -> c.with(Feature.values()))
                           .start();
      }
  
      @AfterClass
      public static void cleanup()
      {
          if (CLUSTER != null)
              CLUSTER.close();
      }
  
      @Test
      public void normal()
      {
          assertThat(CLUSTER.coordinator(1).executeWithResult("SELECT * FROM system_views.settings", ConsistencyLevel.ONE))
          .hasSizeGreaterThan(2)
          .contains("rpc_address", "127.0.0.1")
          .contains("broadcast_address", "127.0.0.1");
  
          assertThat(CLUSTER.coordinator(1).executeWithResult("SELECT * FROM system_views.settings WHERE name=?", ConsistencyLevel.ONE, "rpc_address"))
          .isEqualTo("rpc_address", "127.0.0.1");
  
          assertThat(CLUSTER.coordinator(1).executeWithResult("SELECT * FROM system_views.settings WHERE name IN (?, ?)", ConsistencyLevel.ONE, "rpc_address", "broadcast_address"))
          .contains("rpc_address", "127.0.0.1")
          .contains("broadcast_address", "127.0.0.1")
          .hasSize(2);
      }
  
      @Test
      public void readCommandAccessVirtualTable()
      {
          CLUSTER.get(1).runOnInstance(() -> {
              boolean didWork = false;
              for (InetAddressAndPort address : Gossiper.instance.getLiveMembers())
              {
                  didWork = true;
                  UntypedResultSet rs = QueryProcessor.executeAsync(address, "SELECT * FROM system_views.settings")
                                                      .syncUninterruptibly().getNow();
                  assertThat(rs.isEmpty()).isFalse();
                  for (UntypedResultSet.Row row : rs)
                  {
                      String name = row.getString("name");
                      switch (name)
                      {
                          case "broadcast_address":
                          case "rpc_address":
                              assertThat(row.getString("value")).isEqualTo(address.getAddress().getHostAddress());
                              break;
                      }
                  }
              }
              assertThat(didWork).isTrue();
          });
      }
  
      @Test
      public void readCommandAccessVirtualTableSinglePartition()
      {
          CLUSTER.get(1).runOnInstance(() -> {
              boolean didWork = false;
              for (InetAddressAndPort address : Gossiper.instance.getLiveMembers())
              {
                  didWork = true;
                  UntypedResultSet rs = QueryProcessor.executeAsync(address, "SELECT * FROM system_views.settings WHERE name=?", "rpc_address")
                                                      .syncUninterruptibly().getNow();
                  assertThat(rs.isEmpty()).isFalse();
                  assertThat(rs.one().getString("value")).isEqualTo(address.getAddress().getHostAddress());
              }
              assertThat(didWork).isTrue();
          });
      }
  
      @Test
      public void readCommandAccessVirtualTableMultiplePartition()
      {
          CLUSTER.get(1).runOnInstance(() -> {
              boolean didWork = false;
              for (InetAddressAndPort address : Gossiper.instance.getLiveMembers())
              {
                  didWork = true;
                  UntypedResultSet rs = QueryProcessor.executeAsync(address, "SELECT * FROM system_views.settings WHERE name IN (?, ?)", "rpc_address", "broadcast_address")
                                                      .syncUninterruptibly().getNow();
                  assertThat(rs.isEmpty()).isFalse();
                  Set<String> columns = new HashSet<>();
                  for (UntypedResultSet.Row row : rs)
                  {
                      columns.add(row.getString("name"));
                      assertThat(row.getString("value")).isEqualTo(address.getAddress().getHostAddress());
                  }
                  assertThat(columns).isEqualTo(ImmutableSet.of("rpc_address", "broadcast_address"));
              }
              assertThat(didWork).isTrue();
          });
      }
  }
  