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 bolt; import backtype.storm.Config; import backtype.storm.generated.GlobalStreamId; import backtype.storm.task.OutputCollector; import backtype.storm.task.TopologyContext; import backtype.storm.topology.OutputFieldsDeclarer; import backtype.storm.topology.base.BaseRichBolt; import backtype.storm.tuple.Fields; import backtype.storm.tuple.Tuple; import backtype.storm.utils.TimeCacheMap; import java.sql.Timestamp; import java.util.*; import com.bring.ducksboard.DucksboardDao; import com.bring.ducksboard.DucksboardId; import com.bring.ducksboard.DucksboardRequest; import com.bring.ducksboard.DucksboardService; import com.google.gson.JsonObject; import org.apache.http.impl.client.DefaultHttpClient; import org.json.simple.JSONArray; import org.json.simple.JSONObject; import org.json.simple.JSONValue; import twitter4j.GeoLocation; import util.DucksboardDao2; public class DucksBoardMap extends BaseRichBolt { int count = 0; DucksboardDao2 dao;// = new DucksboardDao(new DefaultHttpClient(), "XEmNNBQb1M8142xtoi3C20NON2VkcPLuo1FdA1HKZXQGcmh1Nn"); DucksboardService service;// = new DucksboardService(dao); DucksboardId id;// = service.createId("522245"); String idString; String keyString; String[] fields; public DucksBoardMap(String id, String key) { this.idString = id; this.keyString = key; } public DucksBoardMap(String json) { Object obj = JSONValue.parse(json); JSONArray array = (JSONArray) obj; JSONObject obj2 = (JSONObject) array.get(0); this.idString = obj2.get("id").toString(); this.keyString = obj2.get("key").toString(); JSONArray fieldsJson = (JSONArray) obj2.get("requiredFields"); String[] fieldsTmp = new String[fieldsJson.size()]; //if (fieldsJson.size() == 0) for (int i = 0; i < fieldsJson.size(); i++) { fieldsTmp[i] = (String) fieldsJson.get(i); } this.fields = fieldsTmp; } @Override public void prepare(Map conf, TopologyContext context, OutputCollector collector) { dao = new DucksboardDao2(new DefaultHttpClient(), keyString); } @Override public void execute(Tuple tuple) { GeoLocation tmp = (GeoLocation) tuple.getValueByField(this.fields[0]); if (tmp != null) { String val = "{\"value\": {\"latitude\": " + tmp.getLatitude() + ",\"longitude\": " + tmp.getLongitude() + " }}"; dao.push(idString, val); } } @Override public void declareOutputFields(OutputFieldsDeclarer ofd) { } }