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 static org.apache.bookkeeper.bookie.BookKeeperServerStats.BOOKIE_SCOPE;
  
  import io.netty.buffer.ByteBufAllocator;
  import java.io.File;
  import java.io.IOException;
  import java.net.URI;
  import org.apache.bookkeeper.common.allocator.ByteBufAllocatorBuilder;
  import org.apache.bookkeeper.common.allocator.ByteBufAllocatorWithOomHandler;
  import org.apache.bookkeeper.conf.ServerConfiguration;
  import org.apache.bookkeeper.meta.LedgerManager;
  import org.apache.bookkeeper.meta.MetadataBookieDriver;
  import org.apache.bookkeeper.meta.MetadataDrivers;
  import org.apache.bookkeeper.meta.exceptions.MetadataException;
  import org.apache.bookkeeper.stats.StatsLogger;
  import org.apache.bookkeeper.util.DiskChecker;
  import org.apache.commons.configuration2.ex.ConfigurationException;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Centralizes the creation of injected resources.
   */
  public class BookieResources {
      private static final Logger log = LoggerFactory.getLogger(BookieResources.class);
  
      /**
       * Instantiate the metadata driver for the Bookie.
       */
      public static MetadataBookieDriver createMetadataDriver(ServerConfiguration conf,
                                                              StatsLogger statsLogger) throws BookieException {
          try {
              String metadataServiceUriStr = conf.getMetadataServiceUri();
              if (null == metadataServiceUriStr) {
                  throw new BookieException.MetadataStoreException("Metadata URI must not be null");
              }
  
              MetadataBookieDriver driver = MetadataDrivers.getBookieDriver(
                  URI.create(metadataServiceUriStr));
              driver.initialize(conf, statsLogger.scope(BOOKIE_SCOPE));
              return driver;
          } catch (MetadataException me) {
              throw new BookieException.MetadataStoreException("Failed to initialize metadata bookie driver", me);
          } catch (ConfigurationException e) {
              throw new BookieException.BookieIllegalOpException(e);
          }
      }
  
      public static ByteBufAllocatorWithOomHandler createAllocator(ServerConfiguration conf) {
          return ByteBufAllocatorBuilder.create()
              .poolingPolicy(conf.getAllocatorPoolingPolicy())
              .poolingConcurrency(conf.getAllocatorPoolingConcurrency())
              .outOfMemoryPolicy(conf.getAllocatorOutOfMemoryPolicy())
              .leakDetectionPolicy(conf.getAllocatorLeakDetectionPolicy())
              .exitOnOutOfMemory(conf.exitOnOutOfMemory())
              .build();
      }
  
      public static DiskChecker createDiskChecker(ServerConfiguration conf) {
          return new DiskChecker(conf.getDiskUsageThreshold(), conf.getDiskUsageWarnThreshold());
      }
  
      public static LedgerDirsManager createLedgerDirsManager(ServerConfiguration conf, DiskChecker diskChecker,
                                                              StatsLogger statsLogger) throws IOException {
          return new LedgerDirsManager(conf, conf.getLedgerDirs(), diskChecker, statsLogger);
      }
  
      public static LedgerDirsManager createIndexDirsManager(ServerConfiguration conf, DiskChecker diskChecker,
                                                             StatsLogger statsLogger, LedgerDirsManager fallback)
              throws IOException {
          File[] idxDirs = conf.getIndexDirs();
          if (null == idxDirs) {
              return fallback;
          } else {
              return new LedgerDirsManager(conf, idxDirs, diskChecker, statsLogger);
          }
      }
  
      public static LedgerStorage createLedgerStorage(ServerConfiguration conf,
                                                      LedgerManager ledgerManager,
                                                      LedgerDirsManager ledgerDirsManager,
                                                      LedgerDirsManager indexDirsManager,
                                                      StatsLogger statsLogger,
                                                      ByteBufAllocator allocator) throws IOException {
          // Instantiate the ledger storage implementation
          String ledgerStorageClass = conf.getLedgerStorageClass();
          log.info("Using ledger storage: {}", ledgerStorageClass);
          LedgerStorage storage = LedgerStorageFactory.createLedgerStorage(ledgerStorageClass);
  
          storage.initialize(conf, ledgerManager, ledgerDirsManager, indexDirsManager, statsLogger, allocator);
          storage.setCheckpointSource(CheckpointSource.DEFAULT);
          return storage;
      }
  
  
  }
  