com.hazelcast.internal.monitor.impl.PartitionIndexesStats Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2024, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.internal.monitor.impl;
import java.util.concurrent.atomic.AtomicLongFieldUpdater;
import static java.util.concurrent.atomic.AtomicLongFieldUpdater.newUpdater;
/**
* The implementation of internal indexes stats specialized for partitioned
* indexes.
*
* The main trait of the implementation is the lack of concurrency support since
* partitioned indexes and their stats are updated from a single thread only.
*/
public class PartitionIndexesStats implements IndexesStats {
private static final AtomicLongFieldUpdater QUERY_COUNT = newUpdater(PartitionIndexesStats.class,
"queryCount");
private static final AtomicLongFieldUpdater INDEXED_QUERY_COUNT = newUpdater(
PartitionIndexesStats.class, "indexedQueryCount");
private volatile long queryCount;
private volatile long indexedQueryCount;
@Override
public long getQueryCount() {
return queryCount;
}
@Override
public void incrementQueryCount() {
QUERY_COUNT.lazySet(this, queryCount + 1);
}
@Override
public long getIndexedQueryCount() {
return indexedQueryCount;
}
@Override
public void incrementIndexedQueryCount() {
INDEXED_QUERY_COUNT.lazySet(this, indexedQueryCount + 1);
}
@Override
public PerIndexStats createPerIndexStats(boolean ordered, boolean queryableEntriesAreCached) {
return new PartitionPerIndexStats();
}
}