Java tutorial
/** * 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 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 org.apache.camel.component.twitter.consumer.search; import java.util.Collections; import java.util.List; import org.apache.camel.component.twitter.TwitterEndpoint; import org.apache.camel.component.twitter.consumer.Twitter4JConsumer; import org.apache.camel.util.ObjectHelper; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import twitter4j.Query; import twitter4j.QueryResult; import twitter4j.Status; import twitter4j.Twitter; import twitter4j.TwitterException; /** * Consumes search requests */ public class SearchConsumer extends Twitter4JConsumer { private static final Logger LOG = LoggerFactory.getLogger(SearchConsumer.class); public SearchConsumer(TwitterEndpoint te) { super(te); } public List<Status> pollConsume() throws TwitterException { String keywords = te.getProperties().getKeywords(); Query query = new Query(keywords); if (te.getProperties().isFilterOld()) { query.setSinceId(lastId); } LOG.debug("Searching twitter with keywords: {}", keywords); return search(query); } public List<Status> directConsume() throws TwitterException { String keywords = te.getProperties().getKeywords(); if (keywords == null || keywords.trim().length() == 0) { return Collections.emptyList(); } Query query = new Query(keywords); LOG.debug("Searching twitter with keywords: {}", keywords); return search(query); } private List<Status> search(Query query) throws TwitterException { Integer numberOfPages = 1; if (ObjectHelper.isNotEmpty(te.getProperties().getLang())) { query.setLang(te.getProperties().getLang()); } if (ObjectHelper.isNotEmpty(te.getProperties().getCount())) { query.setCount(te.getProperties().getCount()); } if (ObjectHelper.isNotEmpty(te.getProperties().getNumberOfPages())) { numberOfPages = te.getProperties().getNumberOfPages(); } LOG.debug("Searching with " + numberOfPages + " pages."); Twitter twitter = te.getProperties().getTwitter(); QueryResult qr = twitter.search(query); List<Status> tweets = qr.getTweets(); for (int i = 1; i < numberOfPages; i++) { if (!qr.hasNext()) { break; } qr = twitter.search(qr.nextQuery()); tweets.addAll(qr.getTweets()); } if (te.getProperties().isFilterOld()) { for (Status t : tweets) { checkLastId(t.getId()); } } return tweets; } }