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.storage.ldb;
  
  import java.io.File;
  import java.io.IOException;
  import java.nio.file.FileSystems;
  import java.nio.file.Path;
  import java.util.Base64;
  import java.util.Map;
  import java.util.concurrent.TimeUnit;
  import org.apache.bookkeeper.bookie.BookieImpl;
  import org.apache.bookkeeper.bookie.storage.ldb.KeyValueStorageFactory.DbConfigType;
  import org.apache.bookkeeper.conf.ServerConfiguration;
  import org.apache.commons.lang3.time.DurationFormatUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Scan the ledgers index to make sure it is readable.
   */
  public class LedgersIndexCheckOp {
      private static final Logger LOG = LoggerFactory.getLogger(LedgersIndexCheckOp.class);
  
      private final ServerConfiguration conf;
      private final boolean verbose;
      private static final String LedgersSubPath = "ledgers";
  
      public LedgersIndexCheckOp(ServerConfiguration conf, boolean verbose) {
          this.conf = conf;
          this.verbose = verbose;
      }
  
      public boolean initiate() throws IOException {
          File[] indexDirs = conf.getIndexDirs();
          if (indexDirs == null) {
              indexDirs = conf.getLedgerDirs();
          }
          if (indexDirs.length != conf.getLedgerDirs().length) {
              throw new IOException("ledger and index dirs size not matched");
          }
          long startTime = System.nanoTime();
          for (int i = 0; i < conf.getLedgerDirs().length; i++) {
              File indexDir = indexDirs[i];
  
              String iBasePath = BookieImpl.getCurrentDirectory(indexDir).toString();
              Path indexCurrentPath = FileSystems.getDefault().getPath(iBasePath, LedgersSubPath);
  
              LOG.info("Loading ledgers index from {}", indexCurrentPath);
              LOG.info("Starting index scan");
  
              try {
                  KeyValueStorage index = new KeyValueStorageRocksDB(iBasePath, LedgersSubPath,
                          DbConfigType.Default, conf, true);
                  // Read all ledgers from db
                  KeyValueStorage.CloseableIterator<Map.Entry<byte[], byte[]>> iterator = index.iterator();
                  int ctr = 0;
                  try {
                      while (iterator.hasNext()) {
                          ctr++;
                          Map.Entry<byte[], byte[]> entry = iterator.next();
                          long ledgerId = ArrayUtil.getLong(entry.getKey(), 0);
                          DbLedgerStorageDataFormats.LedgerData ledgerData =
                                  DbLedgerStorageDataFormats.LedgerData.parseFrom(entry.getValue());
                          if (verbose) {
                              LOG.info(
                                      "Scanned: {}, ledger: {}, exists: {}, isFenced: {}, masterKey: {}, explicitLAC: {}",
                                      ctr,
                                      ledgerId,
                                      (ledgerData.hasExists() ? ledgerData.getExists() : "-"),
                                      (ledgerData.hasFenced() ? ledgerData.getFenced() : "-"),
                                      (ledgerData.hasMasterKey()
                                              ? Base64.getEncoder()
                                              .encodeToString(ledgerData.getMasterKey().toByteArray())
                                              : "-"),
                                      (ledgerData.hasExplicitLac() ? ledgerData.getExplicitLac() : "-"));
                          } else if (ctr % 100 == 0) {
                              LOG.info("Scanned {} ledgers", ctr);
                          }
                      }
                  } finally {
                      iterator.close();
                  }
                  LOG.info("Scanned {} ledgers", ctr);
              } catch (Throwable t) {
                  LOG.error("Index scan has failed with error", t);
                  return false;
              }
          }
          LOG.info("Index scan has completed successfully. Total time: {}",
                  DurationFormatUtils.formatDurationHMS(
                          TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startTime)));
          return true;
      }
  }
  