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OneMeasurement.java
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Thu, May 23, 14:02

OneMeasurement.java
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/**
* Copyright (c) 2010 Yahoo! 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. See accompanying
* LICENSE file.
*/
package com.yahoo.ycsb.measurements;
import java.io.IOException;
import java.util.concurrent.ConcurrentHashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;
import com.yahoo.ycsb.measurements.exporter.MeasurementsExporter;
/**
* A single measured metric (such as READ LATENCY)
*/
public abstract class OneMeasurement {
String _name;
final ConcurrentHashMap<Integer, AtomicInteger> returncodes;
public String getName() {
return _name;
}
/**
* @param _name
*/
public OneMeasurement(String _name) {
this._name = _name;
this.returncodes = new ConcurrentHashMap<Integer, AtomicInteger>();
}
public abstract void measure(int latency);
public abstract String getSummary();
/**
* No need for synchronization, using CHM to deal with that
*/
public void reportReturnCode(int code) {
Integer Icode = code;
AtomicInteger counter = returncodes.get(Icode);
if (counter == null) {
AtomicInteger other = returncodes.putIfAbsent(Icode, counter = new AtomicInteger());
if (other != null) {
counter = other;
}
}
counter.incrementAndGet();
}
/**
* Export the current measurements to a suitable format.
*
* @param exporter Exporter representing the type of format to write to.
* @throws IOException Thrown if the export failed.
*/
public abstract void exportMeasurements(MeasurementsExporter exporter) throws IOException;
}

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