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.directentrylogger;
  import static org.apache.bookkeeper.bookie.BookKeeperServerStats.BOOKIE_ADD_ENTRY;
  import static org.apache.bookkeeper.bookie.BookKeeperServerStats.BOOKIE_READ_ENTRY;
  import static org.apache.bookkeeper.bookie.BookKeeperServerStats.BOOKIE_SCOPE;
  import static org.apache.bookkeeper.bookie.BookKeeperServerStats.CATEGORY_SERVER;
  
  import org.apache.bookkeeper.stats.Counter;
  import org.apache.bookkeeper.stats.OpStatsLogger;
  import org.apache.bookkeeper.stats.StatsLogger;
  import org.apache.bookkeeper.stats.annotations.StatsDoc;
  
  @StatsDoc(
          name = BOOKIE_SCOPE,
          category = CATEGORY_SERVER,
          help = "Direct entry logger stats"
  )
  class DirectEntryLoggerStats {
      private static final String ADD_ENTRY = "entrylog-add-entry";
      private static final String READ_ENTRY = "entrylog-read-entry";
      private static final String FLUSH = "entrylog-flush";
      private static final String WRITER_FLUSH = "entrylog-writer-flush";
      private static final String READ_BLOCK = "entrylog-read-block";
      private static final String READER_OPEN = "entrylog-open-reader";
      private static final String READER_CLOSE = "entrylog-close-reader";
      private static final String CACHED_READER_SERVED_CLOSED = "entrylog-cached-reader-closed";
  
      @StatsDoc(
                name = ADD_ENTRY,
                help = "Operation stats of adding entries to the entry log",
                parent = BOOKIE_ADD_ENTRY
      )
      private final OpStatsLogger addEntryStats;
  
      @StatsDoc(
                name = READ_ENTRY,
                help = "Operation stats of reading entries from the entry log",
                parent = BOOKIE_READ_ENTRY
      )
      private static ThreadLocal<OpStatsLogger> readEntryStats;
  
      @StatsDoc(
                name = FLUSH,
                help = "Stats for persisting outstanding entrylog writes to disk"
      )
      private final OpStatsLogger flushStats;
  
      @StatsDoc(
                name = WRITER_FLUSH,
                help = "Stats for persisting outstanding entrylog writes for a single writer"
      )
      private final OpStatsLogger writerFlushStats;
  
      @StatsDoc(
                name = READ_BLOCK,
                help = "Stats for reading blocks from disk"
      )
      private static ThreadLocal<OpStatsLogger> readBlockStats;
  
      @StatsDoc(
              name = READER_OPEN,
              help = "Stats for reader open operations"
      )
      private static ThreadLocal<Counter> openReaderStats;
  
      @StatsDoc(
              name = READER_CLOSE,
              help = "Stats for reader close operations"
      )
      private static ThreadLocal<Counter> closeReaderStats;
  
      @StatsDoc(
              name = CACHED_READER_SERVED_CLOSED,
              help = "Stats for cached readers being served closed"
      )
      private static ThreadLocal<Counter> cachedReadersServedClosed;
  
      DirectEntryLoggerStats(StatsLogger stats) {
          addEntryStats = stats.getOpStatsLogger(ADD_ENTRY);
  
          flushStats = stats.getOpStatsLogger(FLUSH);
          writerFlushStats = stats.getOpStatsLogger(WRITER_FLUSH);
          setStats(stats);
      }
  
      private static synchronized void setStats(StatsLogger stats) {
          readEntryStats = new ThreadLocal<OpStatsLogger>() {
              @Override
              public OpStatsLogger initialValue() {
                  return stats.scopeLabel("thread", String.valueOf(Thread.currentThread().getId()))
                      .getOpStatsLogger(READ_ENTRY);
              }
          };
          readBlockStats = new ThreadLocal<OpStatsLogger>() {
              @Override
              public OpStatsLogger initialValue() {
                  return stats.scopeLabel("thread", String.valueOf(Thread.currentThread().getId()))
                      .getOpStatsLogger(READ_BLOCK);
              }
          };
  
          DirectEntryLoggerStats.openReaderStats = new ThreadLocal<Counter>() {
              @Override
              public Counter initialValue() {
                  return stats.scopeLabel("thread", String.valueOf(Thread.currentThread().getId()))
                      .getCounter(READER_OPEN);
              }
          };
  
          DirectEntryLoggerStats.closeReaderStats = new ThreadLocal<Counter>() {
              @Override
              public Counter initialValue() {
                  return stats.scopeLabel("thread", String.valueOf(Thread.currentThread().getId()))
                      .getCounter(READER_CLOSE);
              }
          };
  
          DirectEntryLoggerStats.cachedReadersServedClosed = new ThreadLocal<Counter>() {
              @Override
              public Counter initialValue() {
                  return stats.scopeLabel("thread", String.valueOf(Thread.currentThread().getId()))
                      .getCounter(CACHED_READER_SERVED_CLOSED);
              }
          };
      }
  
      OpStatsLogger getAddEntryStats() {
          return addEntryStats;
      }
  
      OpStatsLogger getFlushStats() {
          return flushStats;
      }
  
      OpStatsLogger getWriterFlushStats() {
          return writerFlushStats;
      }
  
      OpStatsLogger getReadEntryStats() {
          return readEntryStats.get();
      }
  
      OpStatsLogger getReadBlockStats() {
          return readBlockStats.get();
      }
  
      Counter getOpenReaderCounter() {
          return openReaderStats.get();
      }
  
      Counter getCloseReaderCounter() {
          return closeReaderStats.get();
      }
  
      Counter getCachedReadersServedClosedCounter() {
          return cachedReadersServedClosed.get();
      }
  }
  