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.stats;
  
  import static org.apache.bookkeeper.bookie.BookKeeperServerStats.ADD_ENTRY;
  import static org.apache.bookkeeper.bookie.BookKeeperServerStats.BOOKIE_ADD_ENTRY;
  import static org.apache.bookkeeper.bookie.BookKeeperServerStats.BOOKIE_ADD_ENTRY_BYTES;
  import static org.apache.bookkeeper.bookie.BookKeeperServerStats.BOOKIE_FORCE_LEDGER;
  import static org.apache.bookkeeper.bookie.BookKeeperServerStats.BOOKIE_GET_LIST_OF_ENTRIES_OF_LEDGER;
  import static org.apache.bookkeeper.bookie.BookKeeperServerStats.BOOKIE_READ_ENTRY;
  import static org.apache.bookkeeper.bookie.BookKeeperServerStats.BOOKIE_READ_ENTRY_BYTES;
  import static org.apache.bookkeeper.bookie.BookKeeperServerStats.BOOKIE_RECOVERY_ADD_ENTRY;
  import static org.apache.bookkeeper.bookie.BookKeeperServerStats.BOOKIE_SCOPE;
  import static org.apache.bookkeeper.bookie.BookKeeperServerStats.CATEGORY_SERVER;
  import static org.apache.bookkeeper.bookie.BookKeeperServerStats.GET_LIST_OF_ENTRIES_OF_LEDGER;
  import static org.apache.bookkeeper.bookie.BookKeeperServerStats.JOURNAL_DIRS;
  import static org.apache.bookkeeper.bookie.BookKeeperServerStats.JOURNAL_QUEUE_MAX_SIZE;
  import static org.apache.bookkeeper.bookie.BookKeeperServerStats.READ_BYTES;
  import static org.apache.bookkeeper.bookie.BookKeeperServerStats.READ_ENTRY;
  import static org.apache.bookkeeper.bookie.BookKeeperServerStats.WRITE_BYTES;
  
  import lombok.Getter;
  import org.apache.bookkeeper.stats.Counter;
  import org.apache.bookkeeper.stats.Gauge;
  import org.apache.bookkeeper.stats.OpStatsLogger;
  import org.apache.bookkeeper.stats.StatsLogger;
  import org.apache.bookkeeper.stats.annotations.StatsDoc;
  
  /**
   * A umbrella class for bookie related stats.
   */
  @StatsDoc(
      name = BOOKIE_SCOPE,
      category = CATEGORY_SERVER,
      help = "Bookie related stats"
  )
  @Getter
  public class BookieStats {
  
      // Expose Stats
      final StatsLogger statsLogger;
      @StatsDoc(name = WRITE_BYTES, help = "total bytes written to a bookie")
      private final Counter writeBytes;
      @StatsDoc(name = READ_BYTES, help = "total bytes read from a bookie")
      private final Counter readBytes;
      @StatsDoc(name = BOOKIE_FORCE_LEDGER, help = "total force operations occurred on a bookie")
      private final Counter forceLedgerOps;
      // Bookie Operation Latency Stats
      @StatsDoc(
          name = BOOKIE_ADD_ENTRY,
          help = "operations stats of AddEntry on a bookie",
          parent = ADD_ENTRY
      )
      private final OpStatsLogger addEntryStats;
      @StatsDoc(name = BOOKIE_RECOVERY_ADD_ENTRY, help = "operation stats of RecoveryAddEntry on a bookie")
      private final OpStatsLogger recoveryAddEntryStats;
      @StatsDoc(
          name = BOOKIE_READ_ENTRY,
          help = "operation stats of ReadEntry on a bookie",
          parent = READ_ENTRY
      )
      private final OpStatsLogger readEntryStats;
      @StatsDoc(
              name = BOOKIE_GET_LIST_OF_ENTRIES_OF_LEDGER,
              help = "operation stats of GetListOfEntriesOfLedger on a bookie",
              parent = GET_LIST_OF_ENTRIES_OF_LEDGER
      )
      private final OpStatsLogger getListOfEntriesOfLedgerStats;
      // Bookie Operation Bytes Stats
      @StatsDoc(name = BOOKIE_ADD_ENTRY_BYTES, help = "bytes stats of AddEntry on a bookie")
      private final OpStatsLogger addBytesStats;
      @StatsDoc(name = BOOKIE_READ_ENTRY_BYTES, help = "bytes stats of ReadEntry on a bookie")
      private final OpStatsLogger readBytesStats;
      @StatsDoc(name = JOURNAL_DIRS, help = "number of configured journal directories")
      private final Gauge<Integer> journalDirsGauge;
      @StatsDoc(name = JOURNAL_QUEUE_MAX_SIZE, help = "maximum length of a journal queue")
      private final Gauge<Integer> journalQueueMaxQueueSizeGauge;
  
      public BookieStats(StatsLogger statsLogger, int numJournalDirs, int maxJournalQueueSize) {
          this.statsLogger = statsLogger;
          writeBytes = statsLogger.getCounter(WRITE_BYTES);
          readBytes = statsLogger.getCounter(READ_BYTES);
          forceLedgerOps = statsLogger.getCounter(BOOKIE_FORCE_LEDGER);
          addEntryStats = statsLogger.getOpStatsLogger(BOOKIE_ADD_ENTRY);
          recoveryAddEntryStats = statsLogger.getOpStatsLogger(BOOKIE_RECOVERY_ADD_ENTRY);
          readEntryStats = statsLogger.getOpStatsLogger(BOOKIE_READ_ENTRY);
          getListOfEntriesOfLedgerStats = statsLogger.getOpStatsLogger(BOOKIE_GET_LIST_OF_ENTRIES_OF_LEDGER);
          addBytesStats = statsLogger.getOpStatsLogger(BOOKIE_ADD_ENTRY_BYTES);
          readBytesStats = statsLogger.getOpStatsLogger(BOOKIE_READ_ENTRY_BYTES);
          journalDirsGauge = new Gauge<Integer>() {
              @Override
              public Integer getDefaultValue() {
                  return numJournalDirs;
              }
  
              @Override
              public Integer getSample() {
                  return numJournalDirs;
              }
          };
          statsLogger.registerGauge(JOURNAL_DIRS, journalDirsGauge);
          journalQueueMaxQueueSizeGauge = new Gauge<Integer>() {
              @Override
              public Integer getDefaultValue() {
                  return maxJournalQueueSize;
              }
  
              @Override
              public Integer getSample() {
                  return maxJournalQueueSize;
              }
          };
          statsLogger.registerGauge(JOURNAL_QUEUE_MAX_SIZE, journalQueueMaxQueueSizeGauge);
      }
  
  
  }
  