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   * 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
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  package org.apache.cassandra.index.sai.metrics;
  
  import com.codahale.metrics.Gauge;
  import com.codahale.metrics.RatioGauge;
  import org.apache.cassandra.index.sai.StorageAttachedIndexGroup;
  import org.apache.cassandra.schema.TableMetadata;
  
  import static org.apache.cassandra.metrics.CassandraMetricsRegistry.Metrics;
  
  public class TableStateMetrics extends AbstractMetrics
  {
      public static final String TABLE_STATE_METRIC_TYPE = "TableStateMetrics";
  
      public TableStateMetrics(TableMetadata table, StorageAttachedIndexGroup group)
      {
          super(table.keyspace, table.name, TABLE_STATE_METRIC_TYPE);
          Metrics.register(createMetricName("DiskUsedBytes"), (Gauge<Long>) group::totalDiskUsage);
          Metrics.register(createMetricName("DiskPercentageOfBaseTable"), (Gauge<Double>) new RatioGauge() {
              @Override
              protected Ratio getRatio()
              {
                  return Ratio.of(group.totalDiskUsage(), group.table().metric.liveDiskSpaceUsed.getCount());
              }
          });
          Metrics.register(createMetricName("TotalIndexCount"), (Gauge<Integer>) group::totalIndexCount);
          Metrics.register(createMetricName("TotalQueryableIndexCount"), (Gauge<Integer>) group::totalQueryableIndexCount);
          Metrics.register(createMetricName("TotalIndexBuildsInProgress"), (Gauge<Integer>) group::totalIndexBuildsInProgress);
      }
  }
  