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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (APEXMALHAR-2094) Quantiles sketch operator
Date Tue, 21 Jun 2016 11:38:58 GMT

    [ https://issues.apache.org/jira/browse/APEXMALHAR-2094?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15341610#comment-15341610
] 

ASF GitHub Bot commented on APEXMALHAR-2094:
--------------------------------------------

Github user bhupeshchawda commented on a diff in the pull request:

    https://github.com/apache/apex-malhar/pull/301#discussion_r67852215
  
    --- Diff: sketches/src/test/java/org/apache/apex/malhar/sketches/QuantilesEstimatorTest.java
---
    @@ -0,0 +1,204 @@
    +/**
    + * 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.apex.malhar.sketches;
    +
    +import java.io.IOException;
    +import java.util.ArrayList;
    +import java.util.Collections;
    +import java.util.List;
    +import java.util.Random;
    +
    +import javax.validation.ConstraintViolationException;
    +
    +import org.junit.Assert;
    +import org.junit.Test;
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +
    +import org.apache.hadoop.conf.Configuration;
    +
    +import com.datatorrent.api.DAG;
    +import com.datatorrent.api.DefaultInputPort;
    +import com.datatorrent.api.DefaultOutputPort;
    +import com.datatorrent.api.InputOperator;
    +import com.datatorrent.api.LocalMode;
    +import com.datatorrent.api.StreamingApplication;
    +import com.datatorrent.common.util.BaseOperator;
    +import com.datatorrent.lib.io.ConsoleOutputOperator;
    +import com.datatorrent.lib.testbench.CollectorTestSink;
    +import com.datatorrent.lib.util.TestUtils;
    +
    +public class QuantilesEstimatorTest
    +{
    +  private static Logger LOG = LoggerFactory.getLogger(QuantilesEstimatorTest.class);
    +
    +  public static class NumberSource extends BaseOperator implements InputOperator
    +  {
    +    public final DefaultOutputPort<Double> output = new DefaultOutputPort<>();
    +
    +    private Random rand = new Random(1234L);
    +
    +    public NumberSource() {}
    +
    +    @Override
    +    public void emitTuples()
    +    {
    +      output.emit(rand.nextGaussian());
    +    }
    +  }
    +
    +  public static class PmfSink extends BaseOperator
    +  {
    +    public final DefaultInputPort<double[]> input = new DefaultInputPort<double[]>()
    +    {
    +      @Override
    +      public void process(double[] tuple) {}
    +    };
    +
    +    public PmfSink() {}
    +  }
    +
    +  public static class QuantileSink extends BaseOperator
    --- End diff --
    
    Not used.


> Quantiles sketch operator
> -------------------------
>
>                 Key: APEXMALHAR-2094
>                 URL: https://issues.apache.org/jira/browse/APEXMALHAR-2094
>             Project: Apache Apex Malhar
>          Issue Type: New Feature
>            Reporter: Sandeep Narayanaswami
>            Assignee: Sandeep Narayanaswami
>            Priority: Minor
>
> An operator that "sketches" in an online fashion the probability distribution of an input
(numeric) data stream, enabling computation of quantiles and cumulative distribution functions.



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