Java tutorial
/* * Copyright (c) 2005-2013, WSO2 Inc. (http://www.wso2.org) All Rights Reserved. * * WSO2 Inc. 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.wso2.carbon.connector.twitter; import java.io.IOException; import java.util.List; import javax.xml.stream.XMLStreamException; import org.apache.axiom.om.OMElement; import org.apache.axiom.om.util.AXIOMUtil; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.synapse.MessageContext; import org.codehaus.jettison.json.JSONException; import org.wso2.carbon.connector.core.ConnectException; import twitter4j.IDs; import twitter4j.Twitter; import twitter4j.TwitterException; import twitter4j.User; import twitter4j.json.DataObjectFactory; public class TwitterGetFriendsIds extends AbstractTwitterConnector { private static Log log = LogFactory.getLog(TwitterGetFriendsIds.class); public static final String USER_ID = "userID"; public static final String SCREEN_NAME = "screenName"; public static final String COUNT = "cursor"; @Override public void connect(MessageContext messageContext) throws ConnectException { if (log.isDebugEnabled()) { log.info("executing twitter get user time line"); } try { String screenName = (TwitterUtils.lookupTemplateParamater(messageContext, SCREEN_NAME) != null && !TwitterUtils.lookupTemplateParamater(messageContext, SCREEN_NAME).isEmpty()) ? TwitterUtils.lookupTemplateParamater(messageContext, SCREEN_NAME) : null; String userID = (TwitterUtils.lookupTemplateParamater(messageContext, USER_ID) != null && !TwitterUtils.lookupTemplateParamater(messageContext, USER_ID).isEmpty()) ? TwitterUtils.lookupTemplateParamater(messageContext, USER_ID) : null; String count = (TwitterUtils.lookupTemplateParamater(messageContext, COUNT) != null && !TwitterUtils.lookupTemplateParamater(messageContext, COUNT).isEmpty()) ? TwitterUtils.lookupTemplateParamater(messageContext, COUNT) : null; Twitter twitter = new TwitterClientLoader(messageContext).loadApiClient(); IDs ids = null; if (screenName != null && !screenName.isEmpty()) { if (count != null && !count.isEmpty()) { ids = twitter.getFriendsIDs(screenName, Long.parseLong(count)); } else { ids = twitter.getFriendsIDs(screenName, -1); } } else if (userID != null && !userID.isEmpty()) { if (count != null && !count.isEmpty()) { ids = twitter.getFriendsIDs(Long.parseLong(userID), Long.parseLong(count)); } else { ids = twitter.getFriendsIDs(Long.parseLong(userID), -1); } } if (log.isDebugEnabled()) { log.error("Retrived result: " + ids.toString()); } OMElement element = this.performSearchMessages(ids.getIDs()); super.preparePayload(messageContext, element); } catch (TwitterException te) { log.error("Failed to search twitter : " + te.getMessage(), te); TwitterUtils.storeErrorResponseStatus(messageContext, te); } catch (Exception te) { log.error("Failed to search generic: " + te.getMessage(), te); TwitterUtils.storeErrorResponseStatus(messageContext, te); } } /** * Performing the searching operation for the given Geo Query criteria. * * @param twitter * @param query * @return * @throws XMLStreamException * @throws TwitterException * @throws JSONException * @throws IOException */ private OMElement performSearchMessages(long[] ids) throws XMLStreamException, TwitterException, JSONException, IOException { OMElement resultElement = AXIOMUtil.stringToOM("<jsonObject><followers/></jsonObject>"); OMElement childElment = resultElement.getFirstElement(); for (Long id : ids) { StringBuilder stringBuilder = new StringBuilder(); stringBuilder.append("{ \"followerId\" : "); stringBuilder.append(id); stringBuilder.append("} "); OMElement element = super.parseJsonToXml(stringBuilder.toString()); childElment.addChild(element.getFirstOMChild()); } if (ids.length == 0) { StringBuilder stringBuilder = new StringBuilder(); stringBuilder.append("{ \"follower\" : {}"); stringBuilder.append("} "); OMElement element = super.parseJsonToXml(stringBuilder.toString()); resultElement.addChild(element); } return resultElement; } }