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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
   *
   *   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.gms;
  
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.AbstractSerializationsTester;
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.dht.IPartitioner;
  import org.apache.cassandra.dht.Token;
  import org.apache.cassandra.distributed.test.log.ClusterMetadataTestHelper;
  import org.apache.cassandra.io.util.DataOutputStreamPlus;
  import org.apache.cassandra.io.util.FileInputStreamPlus;
  import org.apache.cassandra.locator.InetAddressAndPort;
  import org.apache.cassandra.tcm.ClusterMetadata;
  import org.apache.cassandra.utils.FBUtilities;
  
  public class SerializationsTest extends AbstractSerializationsTester
  {
      @BeforeClass
      public static void initDD()
      {
          DatabaseDescriptor.daemonInitialization();
          ClusterMetadataTestHelper.setInstanceForTest();
      }
  
      private void testEndpointStateWrite() throws IOException
      {
          DataOutputStreamPlus out = getOutput("gms.EndpointState.bin");
          HeartBeatState.serializer.serialize(Statics.HeartbeatSt, out, getVersion());
          EndpointState.serializer.serialize(Statics.EndpointSt, out, getVersion());
          VersionedValue.serializer.serialize(Statics.vv0, out, getVersion());
          VersionedValue.serializer.serialize(Statics.vv1, out, getVersion());
          out.close();
  
          // test serializedSize
          testSerializedSize(Statics.HeartbeatSt, HeartBeatState.serializer);
          testSerializedSize(Statics.EndpointSt, EndpointState.serializer);
          testSerializedSize(Statics.vv0, VersionedValue.serializer);
          testSerializedSize(Statics.vv1, VersionedValue.serializer);
      }
  
      @Test
      public void testEndpointStateRead() throws IOException
      {
          if (EXECUTE_WRITES)
              testEndpointStateWrite();
  
          FileInputStreamPlus in = getInput("gms.EndpointState.bin");
          assert HeartBeatState.serializer.deserialize(in, getVersion()) != null;
          assert EndpointState.serializer.deserialize(in, getVersion()) != null;
          assert VersionedValue.serializer.deserialize(in, getVersion()) != null;
          assert VersionedValue.serializer.deserialize(in, getVersion()) != null;
          in.close();
      }
  
      private void testGossipDigestWrite() throws IOException
      {
          Map<InetAddressAndPort, EndpointState> states = new HashMap<>();
          states.put(InetAddressAndPort.getByName("127.0.0.1"), Statics.EndpointSt);
          states.put(InetAddressAndPort.getByName("127.0.0.2"), Statics.EndpointSt);
          GossipDigestAck ack = new GossipDigestAck(Statics.Digests, states);
          GossipDigestAck2 ack2 = new GossipDigestAck2(states);
          GossipDigestSyn syn = new GossipDigestSyn("Not a real cluster name",
                                                    ClusterMetadata.current().tokenMap.partitioner().getClass().getCanonicalName(),
                                                    20240430,
                                                    Statics.Digests);
  
          DataOutputStreamPlus out = getOutput("gms.Gossip.bin");
          for (GossipDigest gd : Statics.Digests)
              GossipDigest.serializer.serialize(gd, out, getVersion());
          GossipDigestAck.serializer.serialize(ack, out, getVersion());
          GossipDigestAck2.serializer.serialize(ack2, out, getVersion());
          GossipDigestSyn.serializer.serialize(syn, out, getVersion());
          out.close();
  
          // test serializedSize
          for (GossipDigest gd : Statics.Digests)
              testSerializedSize(gd, GossipDigest.serializer);
          testSerializedSize(ack, GossipDigestAck.serializer);
          testSerializedSize(ack2, GossipDigestAck2.serializer);
          testSerializedSize(syn, GossipDigestSyn.serializer);
      }
  
      @Test
      public void testGossipDigestRead() throws IOException
      {
          if (EXECUTE_WRITES)
              testGossipDigestWrite();
  
          int count = 0;
          FileInputStreamPlus in = getInput("gms.Gossip.bin");
          while (count++ < Statics.Digests.size())
              assert GossipDigest.serializer.deserialize(in, getVersion()) != null;
          assert GossipDigestAck.serializer.deserialize(in, getVersion()) != null;
          assert GossipDigestAck2.serializer.deserialize(in, getVersion()) != null;
          assert GossipDigestSyn.serializer.deserialize(in, getVersion()) != null;
          in.close();
      }
  
      private static class Statics
      {
          private static HeartBeatState HeartbeatSt = new HeartBeatState(101, 201);
          private static EndpointState EndpointSt = new EndpointState(HeartbeatSt);
          private static IPartitioner partitioner = ClusterMetadata.current().tokenMap.partitioner();
          private static VersionedValue.VersionedValueFactory vvFact = new VersionedValue.VersionedValueFactory(partitioner);
          private static VersionedValue vv0 = vvFact.load(23d);
          private static VersionedValue vv1 = vvFact.bootstrapping(Collections.<Token>singleton(partitioner.getRandomToken()));
          private static List<GossipDigest> Digests = new ArrayList<GossipDigest>();
          static
          {
              EndpointSt.updateHeartBeat();
              EndpointSt.addApplicationState(ApplicationState.LOAD, vv0);
              EndpointSt.addApplicationState(ApplicationState.STATUS_WITH_PORT, vv1);
              for (int i = 0; i < 100; i++)
                  Digests.add(new GossipDigest(FBUtilities.getBroadcastAddressAndPort(), 100 + i, 1000 + 2 * i));
          }
      }
  }
  