/** * 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 at.illecker.sentistorm.bolt; import java.util.List; import java.util.Map; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import at.illecker.sentistorm.components.Tokenizer; import backtype.storm.task.TopologyContext; import backtype.storm.topology.BasicOutputCollector; import backtype.storm.topology.OutputFieldsDeclarer; import backtype.storm.topology.base.BaseBasicBolt; import backtype.storm.tuple.Fields; import backtype.storm.tuple.Tuple; import backtype.storm.tuple.Values; public class TokenizerBolt extends BaseBasicBolt { public static final String ID = "tokenizer-bolt"; public static final String CONF_LOGGING = ID + ".logging"; private static final long serialVersionUID = -2447717633925641497L; private static final Logger LOG = LoggerFactory .getLogger(TokenizerBolt.class); private boolean m_logging = false; @Override public void declareOutputFields(OutputFieldsDeclarer declarer) { // key of output tuples declarer.declare(new Fields("text", "tokens")); } @Override public void prepare(Map config, TopologyContext context) { // Optional set logging if (config.get(CONF_LOGGING) != null) { m_logging = (Boolean) config.get(CONF_LOGGING); } else { m_logging = false; } } @Override public void execute(Tuple tuple, BasicOutputCollector collector) { String text = tuple.getStringByField("text"); List<String> tokens = Tokenizer.tokenize(text); if (m_logging) { LOG.info("Tweet: \"" + text + "\" Tokenized: " + tokens); } // Emit new tuples collector.emit(new Values(text, tokens)); } }