/*
* Copyright (c) 2015 Spotify AB.
*
* 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 com.spotify.heroic.aggregation.simple;
import com.spotify.heroic.aggregation.AnyBucket;
import com.spotify.heroic.metric.Metric;
import lombok.RequiredArgsConstructor;
import java.util.Map;
import java.util.concurrent.atomic.LongAdder;
/**
* Bucket that counts the number of seen samples.
* <p>
* This bucket uses primitives based on striped atomic updates to reduce contention across CPUs.
*
* @author udoprog
*/
@RequiredArgsConstructor
public class StripedCountBucket implements AnyBucket {
private final long timestamp;
private final LongAdder count = new LongAdder();
public long timestamp() {
return timestamp;
}
@Override
public void update(Map<String, String> key, Metric d) {
count.increment();
}
public long count() {
return count.sum();
}
}