user1538020 user1538020 - 3 months ago 28
Java Question

How to use Java classes in Talend

I have the following three classes :
I tried making the routine of 1 & 2 and used tjava to call the main class and the method from 1 & 2 but I am unable to fetch those methods.


1)

package page_scraper;

import com.gargoylesoftware.htmlunit.Page;
import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.WebClientOptions;
import com.gargoylesoftware.htmlunit.html.FrameWindow;
import com.gargoylesoftware.htmlunit.html.HtmlButtonInput;
import com.gargoylesoftware.htmlunit.html.HtmlElement;
import com.gargoylesoftware.htmlunit.html.HtmlOption;
import com.gargoylesoftware.htmlunit.html.HtmlPage;
import com.gargoylesoftware.htmlunit.html.HtmlSelect;
import com.gargoylesoftware.htmlunit.html.HtmlTextInput;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintStream;
import java.io.Writer;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import page_scraper.UnitArray;

public class PageScraper {
public void Scrape() throws IOException {
try {
UnitArray object = new UnitArray();
ArrayList<String> unitList = object.getUnitArray();
WebClient webClient = new WebClient();
webClient.getOptions().setThrowExceptionOnScriptError(false);
webClient.getOptions().setThrowExceptionOnFailingStatusCode(false);
HtmlPage page = (HtmlPage)webClient.getPage("http://www.bmreports.com/servlet/com.logica.neta.bwp_PanBMUData");
List frames = page.getFrames();
HtmlPage page1 = (HtmlPage)((FrameWindow)frames.get(0)).getEnclosedPage();
HtmlTextInput settlementDay = (HtmlTextInput)page1.getHtmlElementById("param5");
HtmlSelect period = (HtmlSelect)page1.getHtmlElementById("param6");
HtmlOption periodOption = period.getOption(1);
HtmlTextInput unitId = (HtmlTextInput)page1.getHtmlElementById("param1");
HtmlButtonInput button = (HtmlButtonInput)page1.getHtmlElementById("go_button");
String outputLocation = String.valueOf(System.getProperty("user.home")) + "/Documents/output.csv";
FileWriter fileWriter = new FileWriter(outputLocation);
String errorLocation = String.valueOf(System.getProperty("user.home")) + "/Documents/error.csv";
FileWriter errorWriter = new FileWriter(errorLocation);
int i = 0;
while (i < unitList.size()) {
int x = 0;
while (x < 365) {
String errorData;
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
Calendar cal = Calendar.getInstance();
cal.add(5, - x);
String dateValue = dateFormat.format(cal.getTime());
System.out.println(dateValue);
settlementDay.setValueAttribute(dateValue);
period.setSelectedAttribute(periodOption, true);
unitId.setValueAttribute(unitList.get(i));
System.out.println(unitList.get(i));
try {
button.click();
HtmlPage page2 = (HtmlPage)((FrameWindow)frames.get(1)).getEnclosedPage();
String pageSource = page2.asXml();
int firstIndex = pageSource.indexOf("csv=") + 38;
int secondIndex = pageSource.indexOf("n\"") + 1;
String csvData = pageSource.substring(firstIndex, secondIndex);
fileWriter.append(csvData);
}
catch (ClassCastException e) {
errorData = String.valueOf(dateValue) + " " + unitList.get(i) + System.getProperty("line.separator");
System.out.println(errorData);
errorWriter.append(errorData);
continue;
}
catch (StringIndexOutOfBoundsException e) {
errorData = String.valueOf(dateValue) + " " + unitList.get(i) + System.getProperty("line.separator");
System.out.println(errorData);
errorWriter.append(errorData);
continue;
}
++x;
}
++i;
}
webClient.close();
fileWriter.close();
errorWriter.close();
}
catch (IOException e) {
e.printStackTrace();
}
}
}


2)

package page_scraper;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;

public class UnitArray {
public ArrayList<String> getUnitArray() {
String csvList = "abc,xyz";
ArrayList<String> list = new ArrayList<String>(Arrays.asList(csvList.split(",")));
return list;
}
}


3)

package page_scraper;

import page_scraper.PageScraper;

public class main {
public static void main(String[] args) throws Exception {
PageScraper test = new PageScraper();
test.Scrape();
}
}


I made the routines for the above code(1) & 2)) in Talend and then used tjava to call the method but unable to do so..I also tried using tjava for all and did a onSubjob ok on each of the tjava.
How can I call these classes in talend and call the method ?

xto xto
Answer

Firstly, routines classes in Talend need to be in routines package

package routines;

public class PageScraper {

    public void Scrape() {
        System.out.println("PageScraper.Scrape");

    }
}

Secondly, to use it in Job you need to drag'n'drop routine to opened job area. how to import routines in talend

Then you can use your class in that way enter image description here

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