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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
* 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;
}
}