/*
* Copyright (c) 2010-2012 Grid Dynamics Consulting Services, Inc, All Rights Reserved
* http://www.griddynamics.com
*
* This library is free software; you can redistribute it and/or modify it under the terms of
* the Apache License; either
* version 2.0 of the License, or any later version.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.griddynamics.jagger.engine.e1.collector;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static com.griddynamics.jagger.util.StandardMetricsNamesUtil.SUM_AGGREGATOR_ID;
/** Calculates summary of all values on interval
* @author Nikolay Musienko
*
* @ingroup Main_Aggregators_group */
public class SumMetricAggregatorProvider implements MetricAggregatorProvider {
/** Method is called to provide instance of private class: \b SumMetricAggregator that implements @ref MetricAggregator<C extends Number> and calculates summary of all values on interval */
@Override
public MetricAggregator provide() {
return new SumMetricAggregator();
}
private static class SumMetricAggregator implements MetricAggregator<Number> {
Logger log = LoggerFactory.getLogger(SumMetricAggregator.class);
Double sum = null;
@Override
public void append(Number calculated) {
log.debug("append({})", calculated);
if (sum == null)
sum = new Double(0);
sum += calculated.doubleValue();
}
@Override
public Number getAggregated() {
if (sum == null)
return null;
return sum.doubleValue();
}
@Override
public void reset() {
log.debug("Reset aggregator");
sum = null;
}
@Override
public String getName() {
return SUM_AGGREGATOR_ID;
}
@Override
public String toString() {
return "SumMetricAggregator{" +
"log=" + log +
", sum=" + sum +
'}';
}
}
}