SOLR-11398: Add weibullDistribution Stream Evaluator

This commit is contained in:
Joel Bernstein 2017-09-25 21:34:45 -04:00
parent 001fa289e4
commit 0e5c3aa3dc
4 changed files with 155 additions and 3 deletions

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@ -301,11 +301,11 @@ public class StreamHandler extends RequestHandlerBase implements SolrCoreAware,
.withFunctionName("movingMedian", MovingMedianEvaluator.class) .withFunctionName("movingMedian", MovingMedianEvaluator.class)
.withFunctionName("monteCarlo", MonteCarloEvaluator.class) .withFunctionName("monteCarlo", MonteCarloEvaluator.class)
.withFunctionName("constantDistribution", ConstantDistributionEvaluator.class) .withFunctionName("constantDistribution", ConstantDistributionEvaluator.class)
.withFunctionName("weibullDistribution", WeibullDistributionEvaluator.class)
.withFunctionName("mean", MeanEvaluator.class)
// Boolean Stream Evaluators // Boolean Stream Evaluators
.withFunctionName("and", AndEvaluator.class) .withFunctionName("and", AndEvaluator.class)
.withFunctionName("eor", ExclusiveOrEvaluator.class) .withFunctionName("eor", ExclusiveOrEvaluator.class)
.withFunctionName("eq", EqualToEvaluator.class) .withFunctionName("eq", EqualToEvaluator.class)

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@ -0,0 +1,57 @@
/*
* 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.solr.client.solrj.io.eval;
import java.io.IOException;
import java.util.List;
import java.util.Locale;
import org.apache.solr.client.solrj.io.stream.expr.StreamExpression;
import org.apache.solr.client.solrj.io.stream.expr.StreamFactory;
import org.apache.commons.math3.stat.StatUtils;
public class MeanEvaluator extends RecursiveObjectEvaluator implements OneValueWorker {
protected static final long serialVersionUID = 1L;
public MeanEvaluator(StreamExpression expression, StreamFactory factory) throws IOException{
super(expression, factory);
if(1 != containedEvaluators.size()){
throw new IOException(String.format(Locale.ROOT,"Invalid expression %s - expecting exactly 1 value but found %d",expression,containedEvaluators.size()));
}
}
@Override
public Object doWork(Object value) throws IOException{
if(null == value){
throw new IOException(String.format(Locale.ROOT, "Unable to find %s(...) because the value is null", constructingFactory.getFunctionName(getClass())));
}
else if(value instanceof List){
List<Number> c = (List<Number>) value;
double[] data = new double[c.size()];
for(int i=0; i< c.size(); i++) {
data[i] = c.get(i).doubleValue();
}
return StatUtils.mean(data);
}
else{
throw new IOException(String.format(Locale.ROOT, "Unable to find %s(...) because the value is not a collection, instead a %s was found", constructingFactory.getFunctionName(getClass()), value.getClass().getSimpleName()));
}
}
}

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@ -0,0 +1,48 @@
/*
* 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.solr.client.solrj.io.eval;
import java.io.IOException;
import java.util.Locale;
import org.apache.commons.math3.distribution.WeibullDistribution;
import org.apache.solr.client.solrj.io.stream.expr.StreamExpression;
import org.apache.solr.client.solrj.io.stream.expr.StreamFactory;
public class WeibullDistributionEvaluator extends RecursiveNumericEvaluator implements TwoValueWorker {
private static final long serialVersionUID = 1;
public WeibullDistributionEvaluator(StreamExpression expression, StreamFactory factory) throws IOException {
super(expression, factory);
}
@Override
public Object doWork(Object first, Object second) throws IOException{
if(null == first){
throw new IOException(String.format(Locale.ROOT,"Invalid expression %s - null found for the first value",toExpression(constructingFactory)));
}
if(null == second){
throw new IOException(String.format(Locale.ROOT,"Invalid expression %s - null found for the second value",toExpression(constructingFactory)));
}
Number shape = (Number)first;
Number scale = (Number)second;
return new WeibullDistribution(shape.doubleValue(), scale.doubleValue());
}
}

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@ -6552,6 +6552,53 @@ public class StreamExpressionTest extends SolrCloudTestCase {
} }
@Test
public void testWeibullDistribution() throws Exception {
String cexpr = "let(echo=true, " +
"a=percentile(sample(weibullDistribution(1, 10),5000), 50), " +
"b=percentile(sample(weibullDistribution(1, 50),5000), 50), " +
"c=percentile(sample(weibullDistribution(1, 100),5000), 50)," +
"d=percentile(sample(weibullDistribution(4, 10),5000), 50)," +
"e=percentile(sample(weibullDistribution(8, 10),5000), 50))";
ModifiableSolrParams paramsLoc = new ModifiableSolrParams();
paramsLoc.set("expr", cexpr);
paramsLoc.set("qt", "/stream");
String url = cluster.getJettySolrRunners().get(0).getBaseUrl().toString()+"/"+COLLECTIONORALIAS;
TupleStream solrStream = new SolrStream(url, paramsLoc);
StreamContext context = new StreamContext();
solrStream.setStreamContext(context);
List<Tuple> tuples = getTuples(solrStream);
assertTrue(tuples.size() == 1);
Number a = (Number)tuples.get(0).get("a");
Number b = (Number)tuples.get(0).get("b");
Number c = (Number)tuples.get(0).get("c");
Number d = (Number)tuples.get(0).get("d");
Number e = (Number)tuples.get(0).get("e");
assertTrue(a.doubleValue() < b.doubleValue());
assertTrue(b.doubleValue() < c.doubleValue());
assertTrue(a.doubleValue() < d.doubleValue());
assertTrue(d.doubleValue() < e.doubleValue());
}
@Test
public void testMean() throws Exception {
String cexpr = "mean(array(1,2,3,4,5))";
ModifiableSolrParams paramsLoc = new ModifiableSolrParams();
paramsLoc.set("expr", cexpr);
paramsLoc.set("qt", "/stream");
String url = cluster.getJettySolrRunners().get(0).getBaseUrl().toString()+"/"+COLLECTIONORALIAS;
TupleStream solrStream = new SolrStream(url, paramsLoc);
StreamContext context = new StreamContext();
solrStream.setStreamContext(context);
List<Tuple> tuples = getTuples(solrStream);
assertTrue(tuples.size() == 1);
Number mean = (Number)tuples.get(0).get("return-value");
assertEquals(mean.doubleValue(), 3.0D, 0.0D);
}
@Test @Test
public void testScale() throws Exception { public void testScale() throws Exception {
UpdateRequest updateRequest = new UpdateRequest(); UpdateRequest updateRequest = new UpdateRequest();