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.bookie;
  
  import io.netty.buffer.ByteBufAllocator;
  import java.io.IOException;
  import java.util.function.Supplier;
  import org.apache.bookkeeper.conf.ServerConfiguration;
  import org.apache.bookkeeper.discover.BookieServiceInfo;
  import org.apache.bookkeeper.discover.RegistrationManager;
  import org.apache.bookkeeper.stats.StatsLogger;
  import org.apache.bookkeeper.util.DiskChecker;
  import org.apache.zookeeper.KeeperException;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Implements a read only bookie.
   * <p>
   * ReadOnlyBookie is force started as readonly, and will not change to writable.
   * </p>
   */
  public class ReadOnlyBookie extends BookieImpl {
  
      private static final Logger LOG = LoggerFactory.getLogger(ReadOnlyBookie.class);
  
      public ReadOnlyBookie(ServerConfiguration conf,
                            RegistrationManager registrationManager,
                            LedgerStorage storage,
                            DiskChecker diskChecker,
                            LedgerDirsManager ledgerDirsManager,
                            LedgerDirsManager indexDirsManager,
                            StatsLogger statsLogger,
                            ByteBufAllocator allocator, Supplier<BookieServiceInfo> bookieServiceInfoProvider)
              throws IOException, KeeperException, InterruptedException, BookieException {
          super(conf, registrationManager, storage, diskChecker,
                ledgerDirsManager, indexDirsManager, statsLogger, allocator, bookieServiceInfoProvider);
          if (conf.isReadOnlyModeEnabled()) {
              stateManager.forceToReadOnly();
          } else {
              String err = "Try to init ReadOnly Bookie, while ReadOnly mode is not enabled";
              LOG.error(err);
              throw new IOException(err);
          }
          LOG.info("Running bookie in force readonly mode.");
      }
  }
  