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   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
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   *
   *     http://www.apache.org/licenses/LICENSE-2.0
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   * Unless required by applicable law or agreed to in writing, software
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   * See the License for the specific language governing permissions and
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  package org.apache.cassandra.distributed.test;
  
  import java.net.InetAddress;
  import java.util.Arrays;
  import java.util.List;
  import java.util.Map;
  import java.util.regex.Pattern;
  import java.util.stream.Collectors;
  
  import org.junit.Assert;
  import org.junit.Test;
  
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.distributed.Cluster;
  import org.apache.cassandra.gms.FailureDetector;
  import org.apache.cassandra.gms.Gossiper;
  import org.apache.cassandra.net.MessagingService;
  import org.apache.cassandra.schema.SystemDistributedKeyspace;
  import org.apache.cassandra.schema.SchemaConstants;
  import org.apache.cassandra.service.StorageProxy;
  import org.apache.cassandra.service.StorageService;
  import org.apache.cassandra.utils.ByteBufferUtil;
  
  import static org.apache.cassandra.distributed.api.Feature.GOSSIP;
  import static org.apache.cassandra.distributed.api.Feature.NETWORK;
  
  // TODO: this test should be removed after running in-jvm dtests is set up via the shared API repository
  public class GossipSettlesTest extends TestBaseImpl
  {
      @Test
      public void testGossipSettles() throws Throwable
      {
          /* Use withSubnet(1) to prove seed provider is set correctly - without the fix to pass a seed provider, this test fails */
          try (Cluster cluster = builder().withNodes(3)
                                          .withConfig(config -> config.with(GOSSIP).with(NETWORK))
                                          .withSubnet(1)
                                          .start())
          {
              // Verify the 4.0 WithPort versions of status reporting methods match their InetAddress
              // counterparts.  Disable Gossip first to prevent any bump in heartbeats that would
              // invalidate the comparison.  Compare the newer WithPort versions by adding the
              // storage port to IP addresses in keys/values/strings as appropriate.
              cluster.forEach(i -> i.runOnInstance(() -> { Gossiper.instance.stop(); }));
              cluster.get(1).runOnInstance(() -> {
  
                  // First prove that the storage port is added
                  Assert.assertEquals("stuff 127.0.0.1:7012 morestuff 127.0.0.2:7012", addStoragePortToIP("stuff 127.0.0.1 morestuff 127.0.0.2"));
  
                  FailureDetector fd = ((FailureDetector) FailureDetector.instance);
                  Assert.assertEquals(addStoragePortToInstanceName(fd.getAllEndpointStates(false)),
                                      fd.getAllEndpointStates(true));
                  Assert.assertEquals(addPortToKeys(fd.getSimpleStates()), fd.getSimpleStatesWithPort());
  
                  StorageProxy sp = StorageProxy.instance;
                  Assert.assertEquals(addPortToSchemaVersions(sp.getSchemaVersions()), sp.getSchemaVersionsWithPort());
  
                  StorageService ss = StorageService.instance;
                  Assert.assertEquals(addPortToValues(ss.getTokenToEndpointMap()), ss.getTokenToEndpointWithPortMap());
                  Assert.assertEquals(addPortToKeys(ss.getEndpointToHostId()), ss.getEndpointWithPortToHostId());
                  Assert.assertEquals(addPortToValues(ss.getHostIdToEndpoint()), ss.getHostIdToEndpointWithPort());
                  Assert.assertEquals(addPortToKeys(ss.getLoadMap()), ss.getLoadMapWithPort());
                  Assert.assertEquals(addPortToList(ss.getLiveNodes()), ss.getLiveNodesWithPort());
                  List<String> naturalEndpointsAddedPort = ss.getNaturalEndpoints(SchemaConstants.DISTRIBUTED_KEYSPACE_NAME,
                                                                                  SystemDistributedKeyspace.VIEW_BUILD_STATUS, "dummy").stream()
                                                             .map(e -> addStoragePortToIP(e.getHostAddress())).collect(Collectors.toList());
                  Assert.assertEquals(naturalEndpointsAddedPort,
                                      ss.getNaturalEndpointsWithPort(SchemaConstants.DISTRIBUTED_KEYSPACE_NAME,
                                                                     SystemDistributedKeyspace.VIEW_BUILD_STATUS, "dummy"));
                  naturalEndpointsAddedPort = ss.getNaturalEndpoints(SchemaConstants.DISTRIBUTED_KEYSPACE_NAME, ByteBufferUtil.EMPTY_BYTE_BUFFER).stream()
                                                .map(e -> addStoragePortToIP(e.getHostAddress())).collect(Collectors.toList());
                  Assert.assertEquals(naturalEndpointsAddedPort,
                                      ss.getNaturalEndpointsWithPort(SchemaConstants.DISTRIBUTED_KEYSPACE_NAME, ByteBufferUtil.EMPTY_BYTE_BUFFER));
  
  
                  // Difference in key type... convert to String and add the port to the older format
                  Map<String, Float> getOwnershipKeyAddedPort = ss.getOwnership().entrySet().stream()
                                                                  .collect(Collectors.<Map.Entry<InetAddress, Float>, String, Float>toMap(
                                                                  e -> addStoragePortToIP(e.getKey().toString()),
                                                                  Map.Entry::getValue));
                  Assert.assertEquals(getOwnershipKeyAddedPort, ss.getOwnershipWithPort());
  
                  MessagingService ms = MessagingService.instance();
                  Assert.assertEquals(addPortToKeys(ms.getTimeoutsPerHost()), ms.getTimeoutsPerHostWithPort());
                  Assert.assertEquals(addPortToKeys(ms.getLargeMessagePendingTasks()), ms.getLargeMessagePendingTasksWithPort());
                  Assert.assertEquals(addPortToKeys(ms.getLargeMessageCompletedTasks()), ms.getLargeMessageCompletedTasksWithPort());
                  Assert.assertEquals(addPortToKeys(ms.getLargeMessageDroppedTasks()), ms.getLargeMessageDroppedTasksWithPort());
                  Assert.assertEquals(addPortToKeys(ms.getSmallMessagePendingTasks()), ms.getSmallMessagePendingTasksWithPort());
                  Assert.assertEquals(addPortToKeys(ms.getSmallMessageCompletedTasks()), ms.getSmallMessageCompletedTasksWithPort());
                  Assert.assertEquals(addPortToKeys(ms.getSmallMessageDroppedTasks()), ms.getSmallMessageDroppedTasksWithPort());
                  Assert.assertEquals(addPortToKeys(ms.getGossipMessagePendingTasks()), ms.getGossipMessagePendingTasksWithPort());
                  Assert.assertEquals(addPortToKeys(ms.getGossipMessageCompletedTasks()), ms.getGossipMessageCompletedTasksWithPort());
                  Assert.assertEquals(addPortToKeys(ms.getGossipMessageDroppedTasks()), ms.getGossipMessageDroppedTasksWithPort());
              });
          }
      }
  
  
      final static Pattern IP4_ADDRESS = Pattern.compile("(127\\.0\\.\\d{1,3}\\.\\d{1,3})");
  
      static String addStoragePortToIP(String s)
      {
          return IP4_ADDRESS.matcher(s).replaceAll("$1:" + DatabaseDescriptor.getStoragePort());
      }
  
      static String addStoragePortToInstanceName(String s)
      {
          return Arrays.stream(s.split("\n")).map(line -> {
              if (line.startsWith(" "))
              {
                  return line;
              }
              else // Host header line
              {
                  return addStoragePortToIP(line);
              }
          }).collect(Collectors.joining("\n", "", "\n")); // to match final blank line
      }
  
      static <V> Map<String, V> addPortToKeys(Map<String, V> source)
      {
          return source.entrySet().stream().collect(Collectors.toMap(entry -> addStoragePortToIP(entry.getKey()),
                                                                     Map.Entry::getValue));
      }
  
      static <K> Map<K, String> addPortToValues(Map<K, String> source)
      {
          return source.entrySet().stream().collect(Collectors.toMap(Map.Entry::getKey,
                                                                     entry -> addStoragePortToIP(entry.getValue())));
      }
  
      static List<String> addPortToList(List<String> list)
      {
          return list.stream().map(GossipSettlesTest::addStoragePortToIP).collect(Collectors.toList());
      }
  
      static Map<String, List<String>> addPortToSchemaVersions(Map<String, List<String>> source)
      {
          return source.entrySet().stream()
                       .collect(Collectors.toMap(Map.Entry::getKey,
                                                 hostAndPortEntry -> addPortToList(hostAndPortEntry.getValue())));
      }
  }
  