/**
* 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.alibaba.jstorm.common.metric.codahale;
import com.codahale.metrics.*;
/**
* @author wange
* @since 2.1.1
*/
public class JHistogram implements Metric, Sampling, Counting {
private final Reservoir reservoir;
private final LongAdder count;
/**
* Creates a new {@link Histogram} with the given reservoir.
*
* @param reservoir the reservoir to create a histogram from
*/
public JHistogram(Reservoir reservoir) {
this.reservoir = reservoir;
this.count = new LongAdder();
}
/**
* Adds a recorded value.
*
* @param value the length of the value
*/
public void update(int value) {
update((long) value);
}
/**
* Adds a recorded value.
*
* @param value the length of the value
*/
public void update(long value) {
count.increment();
reservoir.update(value);
}
/**
* Returns the number of values recorded.
*
* @return the number of values recorded
*/
@Override
public long getCount() {
return count.sum();
}
@Override
public Snapshot getSnapshot() {
return reservoir.getSnapshot();
}
}