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.net;
  
  import java.io.IOException;
  
  import com.google.common.annotations.VisibleForTesting;
  
  import org.apache.cassandra.io.IVersionedSerializer;
  import org.apache.cassandra.io.util.DataInputPlus;
  import org.apache.cassandra.io.util.DataOutputPlus;
  
  import static org.apache.cassandra.net.ConnectionType.URGENT_MESSAGES;
  import static org.apache.cassandra.net.ConnectionType.SMALL_MESSAGES;
  import static org.apache.cassandra.net.ConnectionType.LARGE_MESSAGES;
  
  /**
   * Indicates to the recipient which {@link ConnectionType} should be used for the response.
   */
  public class PingRequest
  {
      static final PingRequest forUrgent = new PingRequest(URGENT_MESSAGES);
      static final PingRequest forSmall  = new PingRequest(SMALL_MESSAGES);
      static final PingRequest forLarge  = new PingRequest(LARGE_MESSAGES);
  
      final ConnectionType connectionType;
  
      private PingRequest(ConnectionType connectionType)
      {
          this.connectionType = connectionType;
      }
  
      @VisibleForTesting
      public static PingRequest get(ConnectionType type)
      {
          switch (type)
          {
              case URGENT_MESSAGES: return forUrgent;
              case  SMALL_MESSAGES: return forSmall;
              case  LARGE_MESSAGES: return forLarge;
              default: throw new IllegalArgumentException("Unsupported type: " + type);
          }
      }
  
      static IVersionedSerializer<PingRequest> serializer = new IVersionedSerializer<PingRequest>()
      {
          public void serialize(PingRequest t, DataOutputPlus out, int version) throws IOException
          {
              out.writeByte(t.connectionType.id);
          }
  
          public PingRequest deserialize(DataInputPlus in, int version) throws IOException
          {
              return get(ConnectionType.fromId(in.readByte()));
          }
  
          public long serializedSize(PingRequest t, int version)
          {
              return 1;
          }
      };
  }
  