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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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   * distributed under the License is distributed on an "AS IS" BASIS,
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  package org.apache.cassandra.hints;
  
  import java.io.IOException;
  import java.util.UUID;
  
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.SchemaLoader;
  import org.apache.cassandra.schema.Schema;
  import org.apache.cassandra.schema.TableMetadata;
  import org.apache.cassandra.db.Mutation;
  import org.apache.cassandra.db.RowUpdateBuilder;
  import org.apache.cassandra.io.util.DataInputBuffer;
  import org.apache.cassandra.io.util.DataInputPlus;
  import org.apache.cassandra.io.util.DataOutputBuffer;
  import org.apache.cassandra.net.MessagingService;
  import org.apache.cassandra.schema.KeyspaceParams;
  import org.apache.cassandra.utils.FBUtilities;
  
  import static org.apache.cassandra.hints.HintsTestUtil.assertHintsEqual;
  import static org.apache.cassandra.utils.ByteBufferUtil.bytes;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotNull;
  
  public class HintMessageTest
  {
      private static final String KEYSPACE = "hint_message_test";
      private static final String TABLE = "table";
  
      @BeforeClass
      public static void setup()
      {
          SchemaLoader.prepareServer();
          SchemaLoader.createKeyspace(KEYSPACE, KeyspaceParams.simple(1), SchemaLoader.standardCFMD(KEYSPACE, TABLE));
      }
  
      @Test
      public void testSerializer() throws IOException
      {
          UUID hostId = UUID.randomUUID();
          long now = FBUtilities.timestampMicros();
          TableMetadata table = Schema.instance.getTableMetadata(KEYSPACE, TABLE);
          
          Mutation mutation = 
              new RowUpdateBuilder(table, now, bytes("key")).clustering("column").add("val", "val" + 1234).build();
          
          Hint hint = Hint.create(mutation, now / 1000);
          HintMessage message = new HintMessage(hostId, hint);
  
          // serialize
          int serializedSize = (int) HintMessage.serializer.serializedSize(message, MessagingService.current_version);
          HintMessage deserializedMessage;
          
          try (DataOutputBuffer dob = new DataOutputBuffer())
          {
              HintMessage.serializer.serialize(message, dob, MessagingService.current_version);
              assertEquals(serializedSize, dob.getLength());
  
              // deserialize
              DataInputPlus di = new DataInputBuffer(dob.buffer(), true);
              deserializedMessage = HintMessage.serializer.deserialize(di, MessagingService.current_version);
          }
  
          // compare before/after
          assertEquals(hostId, deserializedMessage.hostId);
          assertNotNull(deserializedMessage.hint);
          assertHintsEqual(hint, deserializedMessage.hint);
      }
  
      @Test
      public void testEncodedSerializer() throws IOException
      {
          UUID hostId = UUID.randomUUID();
          long now = FBUtilities.timestampMicros();
          TableMetadata table = Schema.instance.getTableMetadata(KEYSPACE, TABLE);
          
          Mutation mutation =
              new RowUpdateBuilder(table, now, bytes("key")).clustering("column").add("val", "val" + 1234) .build();
          
          Hint hint = Hint.create(mutation, now / 1000);
          HintMessage.Encoded message;
          
          try (DataOutputBuffer dob = new DataOutputBuffer())
          {
              Hint.serializer.serialize(hint, dob, MessagingService.current_version);
              message = new HintMessage.Encoded(hostId, dob.buffer(), MessagingService.current_version);
          } 
  
          // serialize
          int serializedSize = (int) HintMessage.serializer.serializedSize(message, MessagingService.current_version);
          DataOutputBuffer dob = new DataOutputBuffer();
          HintMessage.serializer.serialize(message, dob, MessagingService.current_version);
          assertEquals(serializedSize, dob.getLength());
  
          // deserialize
          DataInputPlus dip = new DataInputBuffer(dob.buffer(), true);
          HintMessage deserializedMessage = HintMessage.serializer.deserialize(dip, MessagingService.current_version);
  
          // compare before/after
          assertEquals(hostId, deserializedMessage.hostId);
          assertNotNull(deserializedMessage.hint);
          assertHintsEqual(hint, deserializedMessage.hint);
      }
  }
  