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.localengine.benchmark;
  
  
  import static org.apache.bifromq.basekv.localengine.TestUtil.toByteString;
  
  import org.apache.bifromq.basekv.localengine.IKVSpace;
  import org.apache.bifromq.basekv.localengine.IKVSpaceIterator;
  import org.apache.bifromq.basekv.localengine.IKVSpaceWriter;
  import org.apache.bifromq.basekv.proto.Boundary;
  import com.google.protobuf.ByteString;
  import java.util.Optional;
  import java.util.concurrent.ThreadLocalRandom;
  import java.util.concurrent.TimeUnit;
  import lombok.extern.slf4j.Slf4j;
  import org.openjdk.jmh.annotations.Benchmark;
  import org.openjdk.jmh.annotations.BenchmarkMode;
  import org.openjdk.jmh.annotations.Group;
  import org.openjdk.jmh.annotations.GroupThreads;
  import org.openjdk.jmh.annotations.Level;
  import org.openjdk.jmh.annotations.Mode;
  import org.openjdk.jmh.annotations.OutputTimeUnit;
  import org.openjdk.jmh.annotations.Scope;
  import org.openjdk.jmh.annotations.Setup;
  import org.openjdk.jmh.annotations.State;
  
  @Slf4j
  @State(Scope.Group)
  public class ContinuousKeyDeleteAndGet_Benchmark extends BenchmarkTemplate {
      private static int keyCount = 1000000;
      private ByteString key = ByteString.copyFromUtf8("key");
      private IKVSpace kvSpace;
      private IKVSpaceIterator itr;
      private String rangeId = "testRange";
  
      @State(Scope.Thread)
      public static class BenchmarkThreadState {
          volatile int i = ThreadLocalRandom.current().nextInt(keyCount);
  
          @Setup(Level.Invocation)
          public void inc() {
              i = ThreadLocalRandom.current().nextInt(keyCount);
          }
      }
  
      @Override
      protected void doSetup() {
          kvSpace = kvEngine.createIfMissing(rangeId);
          itr = kvSpace.newIterator();
          IKVSpaceWriter writer = kvSpace.toWriter();
          for (int i = 0; i < keyCount; i++) {
              writer.put(key.concat(toByteString(i)), ByteString.EMPTY);
  //            kvEngine.delete(batchId, DEFAULT_NS, key.concat(toByteString(i)));
          }
          for (int i = keyCount - 1; i >= 0; i--) {
  //            kvEngine.delete(batchId, DEFAULT_NS, key.concat(toByteString(i)));
              writer.clear(Boundary.newBuilder()
                  .setStartKey(key.concat(toByteString(i)))
                  .setEndKey(key.concat(toByteString(i + 1)))
                  .build());
          }
          writer.put(key.concat(toByteString(keyCount)), ByteString.EMPTY);
  //        kvEngine.deleteRange(batchId, DEFAULT_NS, key.concat(toByteString(0)), key.concat(toByteString(keyCount)));
          writer.done();
      }
  
      @Benchmark
      @Group("Get")
      @GroupThreads(8)
      @BenchmarkMode(Mode.Throughput)
      @OutputTimeUnit(TimeUnit.SECONDS)
      public Optional<ByteString> get(BenchmarkThreadState state) {
          return kvSpace.get(key.concat(toByteString(state.i)));
      }
  }
  