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.bifromq.basekv.localengine.rocksdb.metrics;
  
  import org.apache.bifromq.basekv.localengine.metrics.IKVSpaceMetric;
  import io.micrometer.core.instrument.Meter;
  
  /**
   * RocksDB specific metrics for KVSpace.
   */
  public enum RocksDBKVSpaceMetric implements IKVSpaceMetric {
      BlockCache("basekv.le.rocksdb.mem.blockcache", Meter.Type.GAUGE),
      TableReader("basekv.le.rocksdb.mem.tablereader", Meter.Type.GAUGE),
      MemTable("basekv.le.rocksdb.mem.memtable", Meter.Type.GAUGE),
      PinnedMem("basekv.le.rocksdb.mem.pinned", Meter.Type.GAUGE),
      CheckpointTimer("basekv.le.rocksdb.checkpoint.time", Meter.Type.TIMER),
      CompactionCounter("basekv.le.rocksdb.compaction.count", Meter.Type.COUNTER),
      CompactionTimer("basekv.le.rocksdb.compaction.time", Meter.Type.TIMER),
      TotalKeysGauge("basekv.le.rocksdb.compaction.keys", Meter.Type.GAUGE),
      TotalTombstoneKeysGauge("basekv.le.rocksdb.compaction.delkeys", Meter.Type.GAUGE),
      TotalTombstoneRangesGauge("basekv.le.rocksdb.compaction.delranges", Meter.Type.GAUGE),
      FlushTimer("basekv.le.rocksdb.flush.time", Meter.Type.TIMER);
  
      private final String metricName;
      private final Meter.Type meterType;
  
      RocksDBKVSpaceMetric(String metricName, Meter.Type meterType) {
          this.metricName = metricName;
          this.meterType = meterType;
      }
  
      @Override
      public String metricName() {
          return metricName;
      }
  
      @Override
      public Meter.Type meterType() {
          return meterType;
      }
  }
  