Author: sebb
Date: Mon Aug 24 10:50:25 2009
New Revision: 807146
URL: http://svn.apache.org/viewvc?rev=807146&view=rev
Log:
Genericise StatCalculator
Added:
jakarta/jmeter/trunk/src/jorphan/org/apache/jorphan/math/StatCalculatorInteger.java
(with props)
jakarta/jmeter/trunk/src/jorphan/org/apache/jorphan/math/StatCalculatorLong.java
(with props)
Modified:
jakarta/jmeter/trunk/src/core/org/apache/jmeter/visualizers/SamplingStatCalculator.java
jakarta/jmeter/trunk/src/jorphan/org/apache/jorphan/math/StatCalculator.java
jakarta/jmeter/trunk/test/src/org/apache/jorphan/math/TestStatCalculator.java
Modified:
jakarta/jmeter/trunk/src/core/org/apache/jmeter/visualizers/SamplingStatCalculator.java
URL:
http://svn.apache.org/viewvc/jakarta/jmeter/trunk/src/core/org/apache/jmeter/visualizers/SamplingStatCalculator.java?rev=807146&r1=807145&r2=807146&view=diff
==============================================================================
---
jakarta/jmeter/trunk/src/core/org/apache/jmeter/visualizers/SamplingStatCalculator.java
(original)
+++
jakarta/jmeter/trunk/src/core/org/apache/jmeter/visualizers/SamplingStatCalculator.java
Mon Aug 24 10:50:25 2009
@@ -25,7 +25,7 @@
import org.apache.jmeter.samplers.SampleResult;
import org.apache.jorphan.logging.LoggingManager;
-import org.apache.jorphan.math.StatCalculator;
+import org.apache.jorphan.math.StatCalculatorLong;
import org.apache.log.Logger;
/**
@@ -37,7 +37,7 @@
public class SamplingStatCalculator {
private static final Logger log = LoggingManager.getLoggerForClass();
- private final StatCalculator calculator = new StatCalculator();
+ private final StatCalculatorLong calculator = new StatCalculatorLong();
private final List<Sample> storedValues = new Vector<Sample>();
@@ -312,7 +312,7 @@
return maxThroughput;
}
- public HashMap getDistribution() {
+ public HashMap<Number, Number[]> getDistribution() {
return calculator.getDistribution();
}
Modified:
jakarta/jmeter/trunk/src/jorphan/org/apache/jorphan/math/StatCalculator.java
URL:
http://svn.apache.org/viewvc/jakarta/jmeter/trunk/src/jorphan/org/apache/jorphan/math/StatCalculator.java?rev=807146&r1=807145&r2=807146&view=diff
==============================================================================
---
jakarta/jmeter/trunk/src/jorphan/org/apache/jorphan/math/StatCalculator.java
(original)
+++
jakarta/jmeter/trunk/src/jorphan/org/apache/jorphan/math/StatCalculator.java
Mon Aug 24 10:50:25 2009
@@ -25,27 +25,45 @@
import java.util.List;
/**
- * This class serves as a way to calculate the median of a list of values. It
is
- * not threadsafe.
+ * This class serves as a way to calculate the median, max, min etc. of a list
of values.
+ * It is not threadsafe.
*
- * TODO - currently only works properly for Long (because getDistribution()
assumes Long)
- * Will never work for mixed values (e.g. Long and Integer) so should probably
be converted to
- * typed class.
*/
-public class StatCalculator {
- List values = new LinkedList();
+public abstract class StatCalculator<T extends Number & Comparable<T>> {
+
+ private final List<T> values = new LinkedList<T>();
- double sum = 0;
+ private double sum = 0;
- double sumOfSquares = 0;
+ private double sumOfSquares = 0;
- double mean = 0;
+ private double mean = 0;
- double deviation = 0;
+ private double deviation = 0;
- int count = 0;
+ private int count = 0;
- long bytes = 0;
+ private long bytes = 0;
+
+ private final T ZERO;
+
+ private final T MAX_VALUE;
+
+ private final T MIN_VALUE;
+
+ /**
+ * This constructor is used to set up particular values for the generic
class instance.
+ *
+ * @param zero - value to return for Median and PercentPoint if there are
no values
+ * @param min - value to return for minimum if there are no values
+ * @param max - value to return for maximum if there are no values
+ */
+ public StatCalculator(T zero, T min, T max) {
+ super();
+ ZERO = zero;
+ MAX_VALUE = max;
+ MIN_VALUE = min;
+ }
public void clear() {
values.clear();
@@ -56,32 +74,13 @@
count = 0;
}
- public void addValue(long newValue) {
- Number val = new Long(newValue);
- addValue(val);
- }
-
- public void addValue(int newValue) {
- Number val = new Integer(newValue);
- addValue(val);
- }
-
- public void addValue(float newValue) {
- Number val = new Float(newValue);
- addValue(val);
- }
-
- public void addValue(double newValue) {
- Number val = new Double(newValue);
- addValue(val);
- }
public void addBytes(long newValue) {
bytes += newValue;
}
- public void addAll(StatCalculator calc) {
- Iterator<Number> iter = calc.values.iterator();
+ public void addAll(StatCalculator<T> calc) {
+ Iterator<T> iter = calc.values.iterator();
while (iter.hasNext()) {
addValue(iter.next());
}
@@ -89,9 +88,9 @@
public Number getMedian() {
if (count > 0) {
- return (Number) values.get((int) (values.size() * .5));
+ return values.get((int) (values.size() * .5));
}
- return new Long(0);
+ return ZERO;
}
public long getTotalBytes() {
@@ -107,11 +106,11 @@
* @param percent
* @return number of values less than the percentage
*/
- public Number getPercentPoint(float percent) {
+ public T getPercentPoint(float percent) {
if (count > 0) {
- return (Number) values.get((int) (values.size() * percent));
+ return values.get((int) (values.size() * percent));
}
- return new Long(0);
+ return ZERO;
}
/**
@@ -123,25 +122,30 @@
* @param percent
* @return number of values less than the percentage
*/
- public Number getPercentPoint(double percent) {
+ public T getPercentPoint(double percent) {
if (count > 0) {
- return (Number) values.get((int) (values.size() * percent));
+ return values.get((int) (values.size() * percent));
}
- return new Long(0);
+ return ZERO;
}
/**
- * The method has a limit of 1% as the finest granularity. We do this to
- * make sure we get a whole number for iterating.
+ * Returns the distribution of the values in the list.
+ *
+ * TODO round values to reduce the number of distinct entries.
*
+ * @return map containing either Integer or Long keys; entries are a
Number array containing the key and the [Integer] count.
+ * TODO - why is the key value also stored in the entry array?
*/
- public synchronized HashMap getDistribution() {
- HashMap<Long, Number[]> items = new HashMap<Long, Number[]>();
- Iterator<Number> itr = this.values.iterator();
+ public synchronized HashMap<Number, Number[]> getDistribution() {
+ HashMap<Number, Number[]> items = new HashMap<Number, Number[]>();
+ Iterator<T> itr = this.values.iterator();
Number[] dis;
while (itr.hasNext()) {
- Number num = itr.next();
- Long nx = new Long(itr.next().longValue()); // TODO this assumes
the entries are all Long
+ Number nx = itr.next();
+ if (!(nx instanceof Integer || nx instanceof Long)){
+ nx=new Long(nx.longValue()); // convert to Long unless Integer
or Long
+ }
if (items.containsKey(nx)) {
dis = items.get(nx);
dis[1] = new Integer(dis[1].intValue() + 1);
@@ -164,25 +168,25 @@
return deviation;
}
- public Number getMin() {
+ public T getMin() {
if (count > 0) {
- return (Number) values.get(0);
+ return values.get(0);
}
- return new Long(Long.MIN_VALUE);
+ return MIN_VALUE;
}
- public Number getMax() {
+ public T getMax() {
if (count > 0) {
- return (Number) values.get(count - 1);
+ return values.get(count - 1);
}
- return new Long(Long.MAX_VALUE);
+ return MAX_VALUE;
}
public int getCount() {
return count;
}
- public void addValue(Number val) {
+ public void addValue(T val) {
addSortedValue(val);
count++;
double currentVal = val.doubleValue();
@@ -192,10 +196,7 @@
deviation = Math.sqrt((sumOfSquares / count) - (mean * mean));
}
- /**
- * @param val
- */
- private void addSortedValue(Number val) {
+ private void addSortedValue(T val) {
int index = Collections.binarySearch(values, val);
if (index >= 0 && index < values.size()) {
values.add(index, val);
Added:
jakarta/jmeter/trunk/src/jorphan/org/apache/jorphan/math/StatCalculatorInteger.java
URL:
http://svn.apache.org/viewvc/jakarta/jmeter/trunk/src/jorphan/org/apache/jorphan/math/StatCalculatorInteger.java?rev=807146&view=auto
==============================================================================
---
jakarta/jmeter/trunk/src/jorphan/org/apache/jorphan/math/StatCalculatorInteger.java
(added)
+++
jakarta/jmeter/trunk/src/jorphan/org/apache/jorphan/math/StatCalculatorInteger.java
Mon Aug 24 10:50:25 2009
@@ -0,0 +1,33 @@
+/*
+ * 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 org.apache.jorphan.math;
+
+/**
+ * StatCalculator for Integer values
+ */
+public class StatCalculatorInteger extends StatCalculator<Integer> {
+
+ public StatCalculatorInteger() {
+ super(new Integer(0), new Integer(Integer.MIN_VALUE), new
Integer(Integer.MAX_VALUE));
+ }
+
+ public void addValue(int val){
+ super.addValue(new Integer(val));
+ }
+}
Propchange:
jakarta/jmeter/trunk/src/jorphan/org/apache/jorphan/math/StatCalculatorInteger.java
------------------------------------------------------------------------------
svn:eol-style = native
Propchange:
jakarta/jmeter/trunk/src/jorphan/org/apache/jorphan/math/StatCalculatorInteger.java
------------------------------------------------------------------------------
svn:keywords = Author Date Id Revision
Added:
jakarta/jmeter/trunk/src/jorphan/org/apache/jorphan/math/StatCalculatorLong.java
URL:
http://svn.apache.org/viewvc/jakarta/jmeter/trunk/src/jorphan/org/apache/jorphan/math/StatCalculatorLong.java?rev=807146&view=auto
==============================================================================
---
jakarta/jmeter/trunk/src/jorphan/org/apache/jorphan/math/StatCalculatorLong.java
(added)
+++
jakarta/jmeter/trunk/src/jorphan/org/apache/jorphan/math/StatCalculatorLong.java
Mon Aug 24 10:50:25 2009
@@ -0,0 +1,33 @@
+/*
+ * 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 org.apache.jorphan.math;
+
+/**
+ * StatCalculator for Long values
+ */
+public class StatCalculatorLong extends StatCalculator<Long> {
+
+ public StatCalculatorLong() {
+ super(new Long(0L), new Long(Long.MIN_VALUE), new
Long(Long.MAX_VALUE));
+ }
+
+ public void addValue(long val){
+ super.addValue(new Long(val));
+ }
+}
Propchange:
jakarta/jmeter/trunk/src/jorphan/org/apache/jorphan/math/StatCalculatorLong.java
------------------------------------------------------------------------------
svn:eol-style = native
Propchange:
jakarta/jmeter/trunk/src/jorphan/org/apache/jorphan/math/StatCalculatorLong.java
------------------------------------------------------------------------------
svn:keywords = Author Date Id Revision
Modified:
jakarta/jmeter/trunk/test/src/org/apache/jorphan/math/TestStatCalculator.java
URL:
http://svn.apache.org/viewvc/jakarta/jmeter/trunk/test/src/org/apache/jorphan/math/TestStatCalculator.java?rev=807146&r1=807145&r2=807146&view=diff
==============================================================================
---
jakarta/jmeter/trunk/test/src/org/apache/jorphan/math/TestStatCalculator.java
(original)
+++
jakarta/jmeter/trunk/test/src/org/apache/jorphan/math/TestStatCalculator.java
Mon Aug 24 10:50:25 2009
@@ -18,11 +18,13 @@
package org.apache.jorphan.math;
+import java.util.Map;
+
import junit.framework.TestCase;
public class TestStatCalculator extends TestCase {
- StatCalculator calc;
+ private StatCalculatorLong calc;
/**
*
@@ -40,7 +42,7 @@
@Override
public void setUp() {
- calc = new StatCalculator();
+ calc = new StatCalculatorLong();
}
public void testPercentagePoint() throws Exception {
@@ -77,15 +79,25 @@
public void testLong(){
calc.addValue(0L);
calc.addValue(2L);
- assertEquals(Long.valueOf(2),calc.getMax());
- assertEquals(Long.valueOf(0),calc.getMin());
- calc.getDistribution();
+ calc.addValue(2L);
+ final Long long0 = Long.valueOf(0);
+ final Long long2 = Long.valueOf(2);
+ assertEquals(long2,calc.getMax());
+ assertEquals(long0,calc.getMin());
+ Map<Number, Number[]> map = calc.getDistribution();
+ assertTrue(map.containsKey(long0));
+ assertTrue(map.containsKey(long2));
}
+
public void testInteger(){
- calc.addValue(0);
- calc.addValue(2);
- assertEquals(Integer.valueOf(2),calc.getMax());
- assertEquals(Integer.valueOf(0),calc.getMin());
-// calc.getDistribution(); // currently fails with ClassCastException
+ StatCalculatorInteger calci = new StatCalculatorInteger();
+ calci.addValue(0);
+ calci.addValue(2);
+ calci.addValue(2);
+ assertEquals(Integer.valueOf(2),calci.getMax());
+ assertEquals(Integer.valueOf(0),calci.getMin());
+ Map<Number, Number[]> map = calci.getDistribution();
+ assertTrue(map.containsKey(Integer.valueOf(0)));
+ assertTrue(map.containsKey(Integer.valueOf(2)));
}
}
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