code: /*
   * 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.skywalking.library.elasticsearch.bulk;
  
  import java.time.Duration;
  import java.util.concurrent.atomic.AtomicReference;
  import lombok.RequiredArgsConstructor;
  import lombok.extern.slf4j.Slf4j;
  import org.apache.skywalking.library.elasticsearch.ElasticSearch;
  
  import static com.google.common.base.Preconditions.checkArgument;
  import static java.util.Objects.requireNonNull;
  
  @Slf4j
  @RequiredArgsConstructor
  public final class BulkProcessorBuilder {
      private int bulkActions = -1;
      private Duration flushInterval;
      private int concurrentRequests = 2;
      private int batchOfBytes;
  
      public BulkProcessorBuilder bulkActions(int bulkActions) {
          checkArgument(bulkActions > 0, "bulkActions must be positive");
          this.bulkActions = bulkActions;
          return this;
      }
  
      public BulkProcessorBuilder batchOfBytes(int batchOfBytes) {
          checkArgument(batchOfBytes > 0, "batchOfBytes must be positive");
          this.batchOfBytes = batchOfBytes;
          return this;
      }
  
      public BulkProcessorBuilder flushInterval(Duration flushInterval) {
          this.flushInterval = requireNonNull(flushInterval, "flushInterval");
          return this;
      }
  
      public BulkProcessorBuilder concurrentRequests(int concurrentRequests) {
          checkArgument(concurrentRequests >= 0, "concurrentRequests must be >= 0");
          this.concurrentRequests = concurrentRequests;
          return this;
      }
  
      public BulkProcessor build(AtomicReference<ElasticSearch> es) {
          return new BulkProcessor(
              es, bulkActions, flushInterval, concurrentRequests, batchOfBytes);
      }
  }
  