| /* |
| * 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.cassandra.io.sstable.indexsummary; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| |
| import org.apache.cassandra.io.sstable.AbstractMetricsProviders; |
| import org.apache.cassandra.io.sstable.GaugeProvider; |
| import org.apache.cassandra.io.sstable.format.SSTableReader; |
| |
| public class IndexSummaryMetrics<R extends SSTableReader & IndexSummarySupport<R>> extends AbstractMetricsProviders<R> |
| { |
| public final static IndexSummaryMetrics<?> instance = new IndexSummaryMetrics<>(); |
| |
| @Override |
| protected R map(SSTableReader r) |
| { |
| if (r instanceof IndexSummarySupport<?>) |
| return (R) r; |
| return null; |
| } |
| |
| private final GaugeProvider<Long> indexSummaryOffHeapMemoryUsed = newGaugeProvider("IndexSummaryOffHeapMemoryUsed", |
| 0L, |
| r -> r.getIndexSummary().getOffHeapSize(), |
| Long::sum); |
| |
| private final List<GaugeProvider<?>> gaugeProviders = Arrays.asList(indexSummaryOffHeapMemoryUsed); |
| |
| public List<GaugeProvider<?>> getGaugeProviders() |
| { |
| return gaugeProviders; |
| } |
| } |