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.bookkeeper.server.service;
  
  import java.io.IOException;
  import org.apache.bookkeeper.common.util.ReflectionUtils;
  import org.apache.bookkeeper.server.component.ServerLifecycleComponent;
  import org.apache.bookkeeper.server.conf.BookieConfiguration;
  import org.apache.bookkeeper.stats.NullStatsLogger;
  import org.apache.bookkeeper.stats.StatsProvider;
  
  /**
   * A {@link org.apache.bookkeeper.common.component.LifecycleComponent} that runs stats provider.
   */
  public class StatsProviderService extends ServerLifecycleComponent {
  
      public static final String NAME = "stats-provider";
  
      private final StatsProvider statsProvider;
  
      public StatsProviderService(BookieConfiguration conf) throws Exception {
          super(NAME, conf, NullStatsLogger.INSTANCE);
  
          Class<? extends StatsProvider> statsProviderClass =
                      conf.getServerConf().getStatsProviderClass();
          this.statsProvider = ReflectionUtils.newInstance(statsProviderClass);
      }
  
      public StatsProvider getStatsProvider() {
          return this.statsProvider;
      }
  
      @Override
      protected void doStart() {
          statsProvider.start(conf);
      }
  
      @Override
      protected void doStop() {
          statsProvider.stop();
      }
  
      @Override
      protected void doClose() throws IOException {
          // no-op
      }
  }
  