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.bifromq.basekv.store.range.hinter;
  
  import org.apache.bifromq.basekv.store.api.IKVLoadRecord;
  import org.apache.bifromq.basekv.store.proto.ROCoProcInput;
  import org.apache.bifromq.basekv.store.proto.RWCoProcInput;
  import com.google.protobuf.ByteString;
  import java.time.Duration;
  import java.util.Optional;
  import java.util.function.Function;
  import java.util.function.Supplier;
  
  public class QueryKVLoadBasedSplitHinter extends KVLoadBasedSplitHinter {
      public static final String TYPE = "kv_io_query";
  
      public QueryKVLoadBasedSplitHinter(Duration windowSize, String... tags) {
          this(windowSize, Optional::of, tags);
      }
  
      public QueryKVLoadBasedSplitHinter(Duration windowSize,
                                         Function<ByteString, Optional<ByteString>> toSplitKey,
                                         String... tags) {
          this(System::nanoTime, windowSize, toSplitKey, tags);
      }
  
      public QueryKVLoadBasedSplitHinter(Supplier<Long> nanoSource, Duration windowSize,
                                         Function<ByteString, Optional<ByteString>> toSplitKey,
                                         String... tags) {
          super(nanoSource, windowSize, toSplitKey, tags);
      }
  
      @Override
      public void recordQuery(ROCoProcInput input, IKVLoadRecord ioRecord) {
          onRecord(ioRecord);
      }
  
      @Override
      public void recordMutate(RWCoProcInput input, IKVLoadRecord ioRecord) {
          // do nothing
      }
  
      @Override
      protected String type() {
          return TYPE;
      }
  }
  