TextRecruit Challenge

App.java

import com.google.gson.*;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/* Part 2: Processing Application
 *       -------
 *
 *         Requirement:
 *
 *        - Utilize Java 6 or later
 *
 *        Features:
 *
 *        - Read the data from the following URL and prase the JSON
 *
 *         URL: https://gist.githubusercontent.com/anonymous/8f60e8f49158efdd2e8fed6fa97373a4/raw/01add7ea44ed12f5d90180dc1367915af331492e/java-data2.json
 *
 *        - Using threads, for each item in the JSON 'items' array process the MD5 checksum of the 'uid' value and present the MD5 result and the current thread name
 *
 *
 *        Notes:
 *
 *        - Console Application or Web App (your call!)
 *        - Use appropriate amounts of error handling
 *        - You can use external libraries to support implementing the features (if desired or needed)
 *        - Create a repo/gist on GitHub for your results
 *
*/

public class App {

    public static String getData(String urlString) throws IOException {
        BufferedReader reader = null;
        try {
            URL url = new URL(urlString);
            reader = new BufferedReader(new InputStreamReader(url.openStream()));
            StringBuffer buffer = new StringBuffer();
            int read;
            char[] chars = new char[1024];
            while ((read = reader.read(chars)) != -1)
                buffer.append(chars, 0, read);

            return buffer.toString();
        } finally {
            if (reader != null)
                reader.close();
        }
    }


    public static void main(String args[]) throws IOException {
        final String URL = "https://gist.githubusercontent.com/anonymous/8f60e8f49158efdd2e8fed6fa97373a4/raw/01add7ea44ed12f5d90180dc1367915af331492e/java-data2.json";
        parseJSONWithThread(URL);
    }



    public static void parseJSONWithThread(String URL) throws IOException {
        // Get Data from URL
        String jsonString = getData(URL);

        // Parse JSON string and conver to JSON Object
        JsonParser parser = new JsonParser();
        JsonObject object = (JsonObject) parser.parse(jsonString);

        // Parse the items array
        JsonArray arr = object.get("items").getAsJsonArray();

        // Iterate through each element and start a thread to process md5 hash and display results with thread name.
        for(JsonElement el: arr) {
            String index = el.getAsJsonObject().get("index").getAsString();
            String uid = el.getAsJsonObject().get("uid").getAsString();

            new Thread(){
                public void run(){
                    try {

                        MessageDigest md = MessageDigest.getInstance("MD5");
                        md.update(uid.getBytes("UTF-8"));
                        byte[] digest = md.digest();
                        System.out.println(getName() + " running. " + " MD5: " + digest );

                        Thread.sleep(1000);

                    } catch(InterruptedException err) {
                        System.out.println(err);
                    } catch (NoSuchAlgorithmException e) {
                        e.printStackTrace();
                    } catch (UnsupportedEncodingException e) {
                        e.printStackTrace();
                    }
                }
            }.start();
        }
    }


}