| /* |
| * 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 |
| * |
| * 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.streams.twitter.provider; |
| |
| import org.apache.streams.jackson.StreamsJacksonMapper; |
| import org.apache.streams.twitter.api.SevenDaySearchRequest; |
| import org.apache.streams.twitter.api.SevenDaySearchResponse; |
| import org.apache.streams.twitter.api.Twitter; |
| import org.apache.streams.twitter.converter.TwitterDateTimeFormat; |
| import org.apache.streams.twitter.pojo.Tweet; |
| |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.concurrent.Callable; |
| import java.util.stream.Collectors; |
| import java.util.stream.Stream; |
| |
| /** |
| * Retrieve recent posts from standard seven day search. |
| */ |
| public class SevenDaySearchProviderTask implements Callable<Iterator<Tweet>>, Runnable { |
| |
| private static final Logger LOGGER = LoggerFactory.getLogger(SevenDaySearchProviderTask.class); |
| |
| private static ObjectMapper MAPPER = new StreamsJacksonMapper(Stream.of(TwitterDateTimeFormat.TWITTER_FORMAT).collect(Collectors.toList())); |
| |
| protected SevenDaySearchProvider provider; |
| protected Twitter client; |
| protected SevenDaySearchRequest request; |
| protected List<Tweet> responseList = new ArrayList<>(); |
| |
| /** |
| * SevenDaySearchProviderTask constructor. |
| * @param provider SevenDaySearchProvider |
| * @param twitter Twitter |
| * @param request SevenDaySearchRequest |
| */ |
| public SevenDaySearchProviderTask(SevenDaySearchProvider provider, Twitter twitter, SevenDaySearchRequest request) { |
| this.provider = provider; |
| this.client = twitter; |
| this.request = request; |
| } |
| |
| int item_count = 0; |
| int last_count = 0; |
| int page_count = 0; |
| Long maxId = null; |
| |
| @Override |
| public Iterator<Tweet> call() throws Exception { |
| |
| LOGGER.info("Thread Starting: {}", request.toString()); |
| |
| do { |
| |
| SevenDaySearchResponse response = client.sevenDaySearch(request); |
| |
| List<Tweet> statuses = response.getStatuses(); |
| |
| last_count = statuses.size(); |
| |
| page_count++; |
| |
| responseList.addAll(statuses); |
| |
| if( statuses.size() > 0 ) { |
| |
| for (Tweet status : statuses) { |
| |
| if (item_count < provider.getConfig().getMaxItems()) { |
| responseList.add(status); |
| item_count++; |
| } |
| |
| } |
| |
| Stream<Long> statusIds = statuses.stream().map(status -> status.getId()); |
| maxId = statusIds.reduce(Math::min).get(); |
| request.setMaxId(maxId.toString()); |
| |
| } |
| |
| LOGGER.info("item_count: {} last_count: {} page_count: {} ", item_count, last_count, page_count); |
| |
| } |
| while (shouldContinuePulling(last_count, page_count, item_count)); |
| |
| return responseList.iterator(); |
| } |
| |
| public boolean shouldContinuePulling(int item_count, int last_count, int page_count) { |
| boolean shouldContinuePulling = last_count > 0; |
| if ( item_count >= provider.getConfig().getMaxItems() ) { |
| return false; |
| } else if (page_count >= provider.getConfig().getMaxPages()) { |
| return false; |
| } |
| LOGGER.info("shouldContinuePulling: ", shouldContinuePulling); |
| return shouldContinuePulling; |
| } |
| |
| @Override |
| public void run() { |
| try { |
| this.call(); |
| } catch (Exception e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| } |