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.tools.cli.commands.bookie;
  
  import com.beust.jcommander.Parameter;
  import com.google.common.util.concurrent.UncheckedExecutionException;
  import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
  import java.io.File;
  import java.io.IOException;
  import lombok.Setter;
  import lombok.experimental.Accessors;
  import org.apache.bookkeeper.bookie.EntryLogMetadata;
  import org.apache.bookkeeper.bookie.ReadOnlyDefaultEntryLogger;
  import org.apache.bookkeeper.bookie.storage.EntryLogger;
  import org.apache.bookkeeper.conf.ServerConfiguration;
  import org.apache.bookkeeper.tools.cli.commands.bookie.ReadLogMetadataCommand.ReadLogMetadataFlags;
  import org.apache.bookkeeper.tools.cli.helpers.BookieCommand;
  import org.apache.bookkeeper.tools.framework.CliFlags;
  import org.apache.bookkeeper.tools.framework.CliSpec;
  import org.apache.bookkeeper.util.LedgerIdFormatter;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Command to print metadata of entry log.
   */
  public class ReadLogMetadataCommand extends BookieCommand<ReadLogMetadataFlags> {
  
      static final Logger LOG = LoggerFactory.getLogger(ReadLogMetadataCommand.class);
  
      private static final String NAME = "readlogmetadata";
      private static final String DESC = "Prints entrylog's metadata";
  
      private static final long DEFAULT_LOGID = -1L;
      private static final String DEFAULT_FILENAME = "";
      private static final String DEFAULT = "";
  
      private LedgerIdFormatter ledgerIdFormatter;
  
      EntryLogger entryLogger = null;
  
      public ReadLogMetadataCommand() {
          this(new ReadLogMetadataFlags());
      }
  
      public ReadLogMetadataCommand(LedgerIdFormatter ledgerIdFormatter) {
          this(new ReadLogMetadataFlags());
          this.ledgerIdFormatter = ledgerIdFormatter;
      }
  
      private ReadLogMetadataCommand(ReadLogMetadataFlags flags) {
          super(CliSpec.<ReadLogMetadataFlags>newBuilder()
                       .withName(NAME)
                       .withDescription(DESC)
                       .withFlags(flags)
                       .build());
      }
  
      /**
       * Flags for read log metadata command.
       */
      @Accessors(fluent = true)
      @Setter
      public static class ReadLogMetadataFlags extends CliFlags {
  
          @Parameter(names = { "-l", "--logid" }, description = "Entry log id")
          private long logId;
  
          @Parameter(names = { "-f", "--filename" }, description = "Entry log filename")
          private String logFilename;
  
          @Parameter(names = { "-lf", "--ledgeridformatter" }, description = "Set ledger id formatter")
          private String ledgerIdFormatter = DEFAULT;
  
      }
  
      @Override
      public boolean apply(ServerConfiguration conf, ReadLogMetadataFlags cmdFlags) {
          if (!cmdFlags.ledgerIdFormatter.equals(DEFAULT) && ledgerIdFormatter == null) {
              this.ledgerIdFormatter = LedgerIdFormatter.newLedgerIdFormatter(cmdFlags.ledgerIdFormatter, conf);
          } else if (ledgerIdFormatter == null) {
              this.ledgerIdFormatter = LedgerIdFormatter.newLedgerIdFormatter(conf);
          }
          if (cmdFlags.logId == DEFAULT_LOGID && cmdFlags.logFilename.equals(DEFAULT_FILENAME)) {
              LOG.error("Missing entry log id or entry log file name");
              return false;
          }
          try {
              return readLogMetadata(conf, cmdFlags);
          } catch (IOException e) {
              throw new UncheckedExecutionException(e.getMessage(), e);
          }
      }
  
      public boolean readLogMetadata(ServerConfiguration conf, ReadLogMetadataFlags flags) throws IOException {
          long logid = DEFAULT_LOGID;
          if (flags.logId != DEFAULT_LOGID) {
              logid = flags.logId;
          } else if (!flags.logFilename.equals(DEFAULT_FILENAME)) {
              File f = new File(flags.logFilename);
              String name = f.getName();
              if (!name.endsWith(".log")) {
                  LOG.error("ERROR: invalid entry log file name " + flags.logFilename);
                  return false;
              }
              String idString = name.split("\\.")[0];
              logid = Long.parseLong(idString, 16);
          }
  
          printEntryLogMetadata(conf, logid);
          return true;
      }
  
      private void printEntryLogMetadata(ServerConfiguration conf, long logId) throws IOException {
          LOG.info("Print entryLogMetadata of entrylog {} ({}.log)", logId, Long.toHexString(logId));
          initEntryLogger(conf);
          EntryLogMetadata entryLogMetadata = entryLogger.getEntryLogMetadata(logId);
          LOG.info("entryLogId: {}, total size: {}", entryLogMetadata.getEntryLogId(), entryLogMetadata.getTotalSize());
  
          entryLogMetadata.getLedgersMap().forEach((ledgerId, size) -> {
              LOG.info("--------- Lid={}, TotalSizeOfEntriesOfLedger={}  ---------",
                       ledgerIdFormatter.formatLedgerId(ledgerId), size);
          });
      }
  
      @SuppressFBWarnings("IS2_INCONSISTENT_SYNC")
      private synchronized void initEntryLogger(ServerConfiguration conf) throws IOException {
          // provide read only entry logger
          if (null == entryLogger) {
              entryLogger = new ReadOnlyDefaultEntryLogger(conf);
          }
      }
  }
  