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.cql3;
  
  import java.nio.ByteBuffer;
  import java.util.Map;
  
  import org.apache.cassandra.config.CassandraRelevantProperties;
  import org.apache.cassandra.cql3.statements.BatchStatement;
  import org.apache.cassandra.service.ClientState;
  import org.apache.cassandra.service.QueryState;
  import org.apache.cassandra.transport.Dispatcher;
  import org.apache.cassandra.transport.messages.ResultMessage;
  import org.apache.cassandra.utils.MD5Digest;
  
  /**
   * Custom QueryHandler that sends custom request payloads back with the result.
   * Used to facilitate testing.
   * Enabled with system property {@link CassandraRelevantProperties#CUSTOM_QUERY_HANDLER_CLASS}.
   */
  public class CustomPayloadMirroringQueryHandler implements QueryHandler
  {
      static QueryProcessor queryProcessor = QueryProcessor.instance;
  
      public CQLStatement parse(String query, QueryState state, QueryOptions options)
      {
          return queryProcessor.parse(query, state, options);
      }
  
      @Override
      public ResultMessage process(CQLStatement statement,
                                   QueryState state,
                                   QueryOptions options,
                                   Map<String, ByteBuffer> customPayload,
                                   Dispatcher.RequestTime requestTime)
      {
          ResultMessage result = queryProcessor.process(statement, state, options, customPayload, requestTime);
          result.setCustomPayload(customPayload);
          return result;
      }
  
      public ResultMessage.Prepared prepare(String query, ClientState clientState, Map<String, ByteBuffer> customPayload)
      {
          ResultMessage.Prepared prepared = queryProcessor.prepare(query, clientState, customPayload);
          prepared.setCustomPayload(customPayload);
          return prepared;
      }
  
      public QueryProcessor.Prepared getPrepared(MD5Digest id)
      {
          return queryProcessor.getPrepared(id);
      }
  
      @Override
      public ResultMessage processPrepared(CQLStatement statement,
                                           QueryState state,
                                           QueryOptions options,
                                           Map<String, ByteBuffer> customPayload,
                                           Dispatcher.RequestTime requestTime)
      {
          ResultMessage result = queryProcessor.processPrepared(statement, state, options, customPayload, requestTime);
          result.setCustomPayload(customPayload);
          return result;
      }
  
      @Override
      public ResultMessage processBatch(BatchStatement statement,
                                        QueryState state,
                                        BatchQueryOptions options,
                                        Map<String, ByteBuffer> customPayload,
                                        Dispatcher.RequestTime requestTime)
      {
          ResultMessage result = queryProcessor.processBatch(statement, state, options, customPayload, requestTime);
          result.setCustomPayload(customPayload);
          return result;
      }
  }
  