Java tutorial
/* * Copyright 2016 * * 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 friendsandfollowers; import java.io.FileNotFoundException; import java.io.PrintWriter; import java.io.UnsupportedEncodingException; import java.sql.ResultSet; import java.sql.SQLException; import misc.Misc; import mySQL.MysqlDB; import oauth.AppOAuth; import org.apache.commons.lang3.StringEscapeUtils; import org.apache.commons.lang3.StringUtils; import twitter4j.HttpResponseCode; import twitter4j.IDs; import twitter4j.JSONArray; import twitter4j.JSONException; import twitter4j.JSONObject; import twitter4j.Twitter; import twitter4j.TwitterException; import twitter4j.TwitterFactory; /** * Lists Followers IDs * * @author Sohail Ahmed - sohail.ahmed21 at gmail.com */ public final class DBFollowersIDs { public static void main(String[] args) throws ClassNotFoundException, SQLException, JSONException, FileNotFoundException, UnsupportedEncodingException { // Check arguments that passed in if ((args == null) || (args.length == 0)) { System.err.println("2 Parameters are required plus one optional " + "parameter to launch a Job."); System.err.println("First: String 'OUTPUT: /output/path/'"); System.err.println("Second: (int) Number of ids to fetch. " + "Provide number which increment by 5000 " + "(5000, 10000, 15000 etc) " + "or -1 to fetch all ids."); System.err.println("Third (optional): 'screen_name / user_id_str'"); System.err.println("If 3rd argument not provided then provide" + " Twitter users through database."); System.exit(-1); } MysqlDB DB = new MysqlDB(); AppOAuth AppOAuths = new AppOAuth(); Misc helpers = new Misc(); String endpoint = "/followers/ids"; String OutputDirPath = null; try { OutputDirPath = StringEscapeUtils.escapeJava(args[0]); } catch (Exception e) { System.err.println("Argument" + args[0] + " must be an String."); System.exit(-1); } int IDS_TO_FETCH_INT = -1; try { IDS_TO_FETCH_INT = Integer.parseInt(args[1]); } catch (NumberFormatException e) { System.err.println("Argument" + args[1] + " must be an integer."); System.exit(-1); } int IDS_TO_FETCH = 0; if (IDS_TO_FETCH_INT > 5000) { float IDS_TO_FETCH_F = (float) IDS_TO_FETCH_INT / 5000; IDS_TO_FETCH = (int) Math.ceil(IDS_TO_FETCH_F); } else if ((IDS_TO_FETCH_INT <= 5000) && (IDS_TO_FETCH_INT > 0)) { IDS_TO_FETCH = 1; } String targetedUser = ""; if (args.length == 3) { try { targetedUser = StringEscapeUtils.escapeJava(args[2]); } catch (Exception e) { System.err.println("Argument" + args[2] + " must be an String."); System.exit(-1); } } try { TwitterFactory tf = AppOAuths.loadOAuthUser(endpoint); Twitter twitter = tf.getInstance(); int RemainingCalls = AppOAuths.RemainingCalls; int RemainingCallsCounter = 0; System.out.println("First Time Remianing Calls: " + RemainingCalls); String Screen_name = AppOAuths.screen_name; System.out.println("First Time Loaded OAuth Screen_name: " + Screen_name); IDs ids; System.out.println("Listing followers ids."); // if targetedUser not provided by argument, then look into database. if (StringUtils.isEmpty(targetedUser)) { String selectQuery = "SELECT * FROM `followers_parent` WHERE " + "`targeteduser` != '' AND " + "`nextcursor` != '0' AND " + "`nextcursor` != '2'"; ResultSet results = DB.selectQ(selectQuery); int numRows = DB.numRows(results); if (numRows < 1) { System.err.println("No User in database to get followersIDS"); System.exit(-1); } OUTERMOST: while (results.next()) { int followers_parent_id = results.getInt("id"); targetedUser = results.getString("targeteduser"); long cursor = results.getLong("nextcursor"); System.out.println("Targeted User: " + targetedUser); int idsLoopCounter = 0; int totalIDs = 0; // put idsJSON in a file PrintWriter writer = new PrintWriter(OutputDirPath + "/" + targetedUser, "UTF-8"); // call different functions for screen_name and id_str Boolean chckedNumaric = helpers.isNumeric(targetedUser); do { ids = null; try { if (chckedNumaric) { long LongValueTargetedUser = Long.valueOf(targetedUser).longValue(); ids = twitter.getFollowersIDs(LongValueTargetedUser, cursor); } else { ids = twitter.getFollowersIDs(targetedUser, cursor); } } catch (TwitterException te) { // do not throw if user has protected tweets, // or if they deleted their account if (te.getStatusCode() == HttpResponseCode.UNAUTHORIZED || te.getStatusCode() == HttpResponseCode.NOT_FOUND) { System.out.println(targetedUser + " is protected or account is deleted"); } else { System.out.println("Followers Get Exception: " + te.getMessage()); } // If rate limit reached then switch Auth user RemainingCallsCounter++; if (RemainingCallsCounter >= RemainingCalls) { // load auth user tf = AppOAuths.loadOAuthUser(endpoint); twitter = tf.getInstance(); System.out.println( "New User Loaded OAuth" + " Screen_name: " + AppOAuths.screen_name); RemainingCalls = AppOAuths.RemainingCalls; RemainingCallsCounter = 0; System.out.println("New Remianing Calls: " + RemainingCalls); } // update cursor in "followers_parent" String fieldValues = "`nextcursor` = 2"; String where = "id = " + followers_parent_id; DB.Update("`followers_parent`", fieldValues, where); // If error then switch to next user continue OUTERMOST; } if (ids.getIDs().length > 0) { idsLoopCounter++; totalIDs += ids.getIDs().length; System.out.println(idsLoopCounter + ": IDS length: " + ids.getIDs().length); JSONObject responseDetailsJson = new JSONObject(); JSONArray jsonArray = new JSONArray(); for (long id : ids.getIDs()) { jsonArray.put(id); } Object idsJSON = responseDetailsJson.put("ids", jsonArray); writer.println(idsJSON); } // If rate limit reached then switch Auth user RemainingCallsCounter++; if (RemainingCallsCounter >= RemainingCalls) { // load auth user tf = AppOAuths.loadOAuthUser(endpoint); twitter = tf.getInstance(); System.out.println("New User Loaded OAuth " + "Screen_name: " + AppOAuths.screen_name); RemainingCalls = AppOAuths.RemainingCalls; RemainingCallsCounter = 0; System.out.println("New Remianing Calls: " + RemainingCalls); } if (IDS_TO_FETCH_INT != -1) { if (idsLoopCounter == IDS_TO_FETCH) { break; } } } while ((cursor = ids.getNextCursor()) != 0); writer.close(); System.out.println("Total ids dumped of " + targetedUser + " are: " + totalIDs); System.out.println(); // update cursor in "followers_parent" String fieldValues = "`nextcursor` = " + cursor; String where = "id = " + followers_parent_id; DB.Update("`followers_parent`", fieldValues, where); } // loop through every result found in db } else { // Second Argument Set, so we are here. System.out.println("screen_name / user_id_str passed by argument"); int idsLoopCounter = 0; int totalIDs = 0; // put idsJSON in a file PrintWriter writer = new PrintWriter( OutputDirPath + "/" + targetedUser + "_ids_" + helpers.getUnixTimeStamp(), "UTF-8"); // call different functions for screen_name and id_str Boolean chckedNumaric = helpers.isNumeric(targetedUser); long cursor = -1; do { ids = null; try { if (chckedNumaric) { long LongValueTargetedUser = Long.valueOf(targetedUser).longValue(); ids = twitter.getFollowersIDs(LongValueTargetedUser, cursor); } else { ids = twitter.getFollowersIDs(targetedUser, cursor); } } catch (TwitterException te) { // do not throw if user has protected tweets, or if they deleted their account if (te.getStatusCode() == HttpResponseCode.UNAUTHORIZED || te.getStatusCode() == HttpResponseCode.NOT_FOUND) { System.out.println(targetedUser + " is protected or account is deleted"); } else { System.out.println("Followers Get Exception: " + te.getMessage()); } System.exit(-1); } if (ids.getIDs().length > 0) { idsLoopCounter++; totalIDs += ids.getIDs().length; System.out.println(idsLoopCounter + ": IDS length: " + ids.getIDs().length); JSONObject responseDetailsJson = new JSONObject(); JSONArray jsonArray = new JSONArray(); for (long id : ids.getIDs()) { jsonArray.put(id); } Object idsJSON = responseDetailsJson.put("ids", jsonArray); writer.println(idsJSON); } // If rate limit reach then switch Auth user RemainingCallsCounter++; if (RemainingCallsCounter >= RemainingCalls) { // load auth user tf = AppOAuths.loadOAuthUser(endpoint); twitter = tf.getInstance(); System.out.println("New User Loaded OAuth Screen_name: " + AppOAuths.screen_name); RemainingCalls = AppOAuths.RemainingCalls; RemainingCallsCounter = 0; System.out.println("New Remianing Calls: " + RemainingCalls); } if (IDS_TO_FETCH_INT != -1) { if (idsLoopCounter == IDS_TO_FETCH) { break; } } } while ((cursor = ids.getNextCursor()) != 0); writer.close(); System.out.println("Total ids dumped of " + targetedUser + " are: " + totalIDs); System.out.println(); } } catch (TwitterException te) { // te.printStackTrace(); System.err.println("Failed to get followers' ids: " + te.getMessage()); System.exit(-1); } System.out.println("!!!! DONE !!!!"); } }