content: /**
   * 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 com.alibaba.aloha.meta.example;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import org.apache.log4j.Logger;
  
  import backtype.storm.Config;
  import backtype.storm.LocalCluster;
  import backtype.storm.StormSubmitter;
  import backtype.storm.generated.StormTopology;
  import backtype.storm.tuple.Fields;
  import backtype.storm.tuple.Values;
  import storm.trident.TridentState;
  import storm.trident.TridentTopology;
  import storm.trident.operation.BaseFunction;
  import storm.trident.operation.BaseFilter;
  import storm.trident.operation.TridentCollector;
  import storm.trident.operation.builtin.Count;
  import storm.trident.operation.builtin.FilterNull;
  import storm.trident.operation.builtin.MapGet;
  import storm.trident.operation.builtin.Sum;
  import storm.trident.testing.MemoryMapState;
  import storm.trident.tuple.TridentTuple;
  
  import com.alibaba.aloha.meta.MetaSpout;
  import com.alibaba.aloha.meta.MetaTuple;
  
  public class TestTridentTopology {
  	private static final Logger LOG = Logger.getLogger(TestTridentTopology.class);
  	
  	public static class MsgPrint extends BaseFunction {
  		@Override
  		public void execute(TridentTuple tuple, TridentCollector collector) {
  			MetaTuple metaTuple = (MetaTuple) tuple.getValue(0);
  			LOG.info("Messages: " + metaTuple);
  			collector.emit(null);
  		}
  	}
  	
  	public static StormTopology buildTopology() {
  		TridentTopology topology = new TridentTopology();
  		topology.newStream("MetaSpout", new MetaSpout()).each(new Fields("MetaTuple"), new MsgPrint(), new Fields());
  		
  		return topology.build();
  	}
  	
  	public static void main(String[] args) throws Exception{
  		if (args.length == 0) {
  			System.err.println("Please input configuration file");
  			System.exit(-1);
  		}
  
  		Map conf = LoadConfig.LoadConf(args[0]);	
  
  		if (conf == null) {
  			LOG.error("Failed to load config");
  		} else {
  			Config config = new Config();
  			config.putAll(conf);
  	        config.setMaxSpoutPending(10);
  	        config.put(LoadConfig.TOPOLOGY_TYPE, "Trident");
  	        StormSubmitter.submitTopology("WordCount", config, buildTopology());
  		}
  	}
  }