net.sf.jabb.util.stat.AtomicLongStatistics.java Source code

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Here is the source code for net.sf.jabb.util.stat.AtomicLongStatistics.java

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/*
Copyright 2010-2011, 2015 Zhengmao HU (James)
    
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 net.sf.jabb.util.stat;

import java.io.Serializable;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.concurrent.atomic.AtomicLong;

import org.apache.commons.lang3.builder.EqualsBuilder;

/**
 * ???
 * ??????
 * 
 * @author Zhengmao HU (James)
 * @deprecated use ConcurrentLongStatistics in jabb-core-java8 instead if you can use Java 8
 */
public class AtomicLongStatistics implements NumberStatistics<Long>, Serializable {
    private static final long serialVersionUID = 2001318020408834046L;

    protected AtomicLong count;
    protected AtomicLong sum;
    protected ConcurrentLongMinMaxHolder minMax;

    public AtomicLongStatistics() {
        count = new AtomicLong();
        sum = new AtomicLong();
        minMax = new ConcurrentLongMinMaxHolder();
    }

    @Override
    public boolean equals(Object other) {
        if (other == this) {
            return true;
        }
        if (other == null || !(other instanceof NumberStatistics<?>)) {
            return false;
        }
        NumberStatistics<?> that = (NumberStatistics<?>) other;
        return new EqualsBuilder().append(this.getCount(), that.getCount())
                .append(this.getSum(), that.getSum() == null ? null : Long.valueOf(that.getSum().longValue()))
                .append(this.getMin(), that.getMin() == null ? null : Long.valueOf(that.getMin().longValue()))
                .append(this.getMax(), that.getMax() == null ? null : Long.valueOf(that.getMax().longValue()))
                .isEquals();
    }

    @Override
    public void evaluate(int value) {
        count.incrementAndGet();
        sum.addAndGet(value);
        minMax.evaluate(value);
    }

    @Override
    public void evaluate(long value) {
        count.incrementAndGet();
        sum.addAndGet(value);
        minMax.evaluate(value);
    }

    @Override
    public void evaluate(BigInteger value) {
        long x = value.longValue();
        count.incrementAndGet();
        sum.addAndGet(x);
        minMax.evaluate(x);
    }

    @Override
    public Double getAvg() {
        long countValue = count.get();
        if (countValue > 0) {
            return sum.doubleValue() / countValue;
        } else {
            return null;
        }
    }

    @Override
    public BigDecimal getAvg(int scale) {
        return new BigDecimal(getAvg()).setScale(scale, BigDecimal.ROUND_HALF_UP);
    }

    @Override
    public Long getMin() {
        return minMax.getMinAsLong();
    }

    @Override
    public Long getMax() {
        return minMax.getMaxAsLong();
    }

    @Override
    public Long getSum() {
        return sum.get();
    }

    @Override
    public long getCount() {
        return count.get();
    }

    @Override
    public void reset() {
        count.set(0);
        sum.set(0);
        minMax.reset();
    }

    @Override
    public void reset(Long newCount, Long newSum, Long newMin, Long newMax) {
        count.set(newCount);
        sum.set(newSum);
        minMax.reset(newMin, newMax);
    }

    @Override
    public String toString() {
        return "(" + count.get() + ", " + sum.get() + ", " + getMin() + "/" + getMax() + ")";
    }

    @Override
    public void merge(long count, Long sum, Long min, Long max) {
        this.count.addAndGet(count);
        if (sum != null) {
            this.sum.addAndGet(sum);
        }
        if (min != null) {
            this.minMax.evaluate(min);
        }
        if (max != null) {
            this.minMax.evaluate(max);
        }
    }

    @Override
    public void merge(NumberStatistics<? extends Number> other) {
        if (other != null) {
            merge(other.getCount(), other.getSum().longValue(), other.getMin().longValue(),
                    other.getMax().longValue());
        }
    }

}