[GitHub] incubator-apex-malhar pull request: Committing files for additiona...

[gauravgopi123 <gi...@git.apache.org>]

Github user gauravgopi123 commented on a diff in the pull request:

    https://github.com/apache/incubator-apex-malhar/pull/153#discussion_r48765084
  
    --- Diff: demos/twitter/src/main/java/com/datatorrent/demos/twitter/RSSFeedExtractor.java ---
    @@ -0,0 +1,133 @@
    +/**
    + * Copyright (C) 2015 DataTorrent, Inc.
    + *
    + * 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.
    + */
    +package com.datatorrent.demos.twitter;
    +
    +import com.datatorrent.api.DefaultOutputPort;
    +import com.datatorrent.api.Context.OperatorContext;
    +import com.datatorrent.api.InputOperator;
    +
    +import java.io.BufferedReader;
    +import java.io.IOException;
    +import java.io.InputStream;
    +import java.net.URL;
    +
    +import javax.xml.parsers.DocumentBuilder;
    +import javax.xml.parsers.DocumentBuilderFactory;
    +import javax.xml.parsers.ParserConfigurationException;
    +
    +import org.w3c.dom.Document;
    +import org.w3c.dom.Element;
    +import org.w3c.dom.Node;
    +import org.w3c.dom.NodeList;
    +import org.xml.sax.SAXException;
    +
    +/**
    + * <p>
    + * RSSFeedExtractor class.
    + * </p>
    + *
    + * @since 3.3.2
    + */
    +public class RSSFeedExtractor implements InputOperator
    +{
    +  protected String URLToConvert = "";
    +  protected BufferedReader in;
    +  URL rssURL;
    +  DocumentBuilderFactory dbFactory;
    +  DocumentBuilder dBuilder;
    +  public final transient DefaultOutputPort<String> output = new DefaultOutputPort<String>();
    +  DocumentBuilderFactory URLdbFactory;
    +  DocumentBuilder URLdBuilder;
    +  
    +  @Override
    +  public void beginWindow(long windowId)
    +  {
    +
    +  }
    +
    +  @Override
    +  public void endWindow()
    +  {
    +
    +  }
    +
    +  @Override
    +  public void setup(OperatorContext context)
    +  {
    +    try {
    +      dbFactory = DocumentBuilderFactory.newInstance();
    +      dBuilder = dbFactory.newDocumentBuilder();
    +      InputStream is = this.getClass().getClassLoader()
    +          .getResourceAsStream("RSS.xml");
    +      Document doc = null;
    +      try {
    +        doc = dBuilder.parse(is);
    +      } catch (SAXException e) {
    +        throw new RuntimeException("SAX Exception", e);
    +      }
    +
    +      doc.getDocumentElement().normalize();
    +
    +      NodeList nList = doc.getElementsByTagName("sub");
    +      for (int index = 0; index < nList.getLength(); index++) {
    +        Node nNode = nList.item(index);
    +        if (nNode.getNodeType() == Node.ELEMENT_NODE) {
    +          Element eElement = (Element) nNode;
    +          URLToConvert = eElement.getElementsByTagName("value").item(0)
    +              .getTextContent();
    +        }
    +      }
    +    } catch (ParserConfigurationException e) {
    +      throw new RuntimeException("Parser Configuration Exception", e);
    +
    +    } catch (IOException e) {
    +      throw new RuntimeException("Runtime Exception", e);
    +    }
    +  }
    +
    +  @Override
    +  public void teardown()
    +  {
    +
    +  }
    +  
    +  @Override
    +  public void emitTuples()
    +  {
    +      URLdbFactory = DocumentBuilderFactory.newInstance();
    +      try {
    +		URLdBuilder = URLdbFactory.newDocumentBuilder();
    +		Document page = URLdBuilder.parse(URLToConvert);
    +		NodeList itemList = page.getElementsByTagName("item");
    +		for (int i = 0; i < itemList.getLength(); i++){
    +		  Node it = itemList.item(i);
    +		  NodeList tagList = it.getChildNodes();
    +		  for (int j = 0; j < tagList.getLength(); j++) {
    +			  if (j % 2 != 0) {
    +				String tagName = tagList.item(j).getNodeName().toUpperCase();
    +				String tagValue = tagList.item(j).getTextContent();
    +			    System.out.println(tagName + " : " + tagValue);
    +			  }
    +		  }
    +		  System.out.println();
    +		  System.out.println("-----------------------------------");
    +		  System.out.println();
    +	    }
    --- End diff --
    
    Instead of System.out.println please use logger


---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastructure@apache.org or file a JIRA ticket
with INFRA.
---