Storm-Mongodb详解

这两天研究Trident，踩坑踩的遭不住，来和大家分享下。

首先写入数据库：

先看官方API给我们提供的方法：

//这是用来辅助下面MongoInsert的简单实现类
public class SimpleMongoMapper implements MongoMapper {
    private String[] fields;

    @Override
    public Document toDocument(ITuple tuple) {
        Document document = new Document();
        for(String field : fields){
            document.append(field, tuple.getValueByField(field));
        }
        return document;
    }

    public SimpleMongoMapper withFields(String... fields) {
        this.fields = fields;
        return this;
    }
}

//写入数据库
String url = "mongodb://127.0.0.1:27017/test";
String collectionName = "wordcount";

MongoMapper mapper = new SimpleMongoMapper()
        .withFields("word", "count");

MongoInsertBolt insertBolt = new MongoInsertBolt(url, collectionName, mapper);

一起把官网关于更新的mapper写了：

public class SimpleMongoUpdateMapper implements MongoMapper {
    private String[] fields;

    @Override
    public Document toDocument(ITuple tuple) {
        Document document = new Document();
        for(String field : fields){
            document.append(field, tuple.getValueByField(field));
        }
        return new Document("$set", document);
    }

    public SimpleMongoUpdateMapper withFields(String... fields) {
        this.fields = fields;
        return this;
    }
}

下面是自己的代码，从spout到最后的存储与跟新：

import java.util.HashMap;
import java.util.Map;
import java.util.Random;

import org.apache.storm.spout.SpoutOutputCollector;
import org.apache.storm.task.TopologyContext;
import org.apache.storm.topology.OutputFieldsDeclarer;
import org.apache.storm.topology.base.BaseRichSpout;
import org.apache.storm.tuple.Fields;
import org.apache.storm.tuple.Values;

/**
 * @author cwc
 * @date 2018年6月1日  
 * @description:假数据生产厂
 * @version 1.0.0 
 */
public class MongodbSpout extends BaseRichSpout{
	private static final long serialVersionUID = 1L;
	private SpoutOutputCollector collector;
	 /**
     * 作为字段word输出
     */
    private static final Map<Integer, String> LASTNAME = new HashMap<Integer, String>();  
    static {  
        LASTNAME.put(0, "anderson");  
        LASTNAME.put(1, "watson");  
        LASTNAME.put(2, "ponting");  
        LASTNAME.put(3, "dravid");  
        LASTNAME.put(4, "lara");  
    }  
    /**
     * 作为字段val输出
     */
    private static final Map<Integer, String> COMPANYNAME = new HashMap<Integer, String>();  
    static {  
        COMPANYNAME.put(0, "abc");  
        COMPANYNAME.put(1, "dfg");  
        COMPANYNAME.put(2, "pqr");  
        COMPANYNAME.put(3, "ecd");  
        COMPANYNAME.put(4, "awe");  
    }  
  
    public void open(Map conf, TopologyContext context,  
            SpoutOutputCollector spoutOutputCollector) {  
        this.collector = spoutOutputCollector;  
    }  
  
    public void nextTuple() {  
        final Random rand = new Random();  
        int randomNumber = rand.nextInt(5); 
        this.collector.emit (new Values(LASTNAME.get(randomNumber),COMPANYNAME.get(randomNumber)));
        System.out.println("数据来袭！！！！！！");
    }  
	@Override
	public void declareOutputFields(OutputFieldsDeclarer declarer) {
		//这边字段数量与上面的传输数量注意要一致
		declarer.declare(new Fields("word","hello"));
	}

	}

import org.apache.storm.mongodb.common.mapper.MongoMapper;
import org.apache.storm.tuple.ITuple;
import org.bson.Document;

/**
 * @author cwc
 * @date 2018年6月1日  
 * @description:
 * @version 1.0.0 
 */
public class SimpleMongoMapper implements MongoMapper {

	 private String[] fields;
	 	
	    @Override
	    public Document toDocument(ITuple tuple) {
	    	
	        Document document = new Document();
	        for(String field : fields){
	            document.append(field, tuple.getValueByField(field));
	        }
	        return document;
	    }

	    public SimpleMongoMapper withFields(String... fields) {
	        this.fields = fields;
	        return this;
	    }
}

import org.apache.storm.mongodb.common.mapper.MongoMapper;
import org.apache.storm.tuple.ITuple;
import org.bson.Document;

/**
 * @author cwc
 * @date 2018年6月5日  
 * @description: 用于更新数据的mapper
 * @version 1.0.0 
 */
public class SimpleMongoUpdateMapper implements MongoMapper {
	private static final long serialVersionUID = 1L;
	private String[] fields;

    @Override
    public Document toDocument(ITuple tuple) {
        Document document = new Document();
        for(String field : fields){
            document.append(field, tuple.getValueByField(field));
        }
        return new Document("$set", document);
    }

    public SimpleMongoUpdateMapper withFields(String... fields) {
        this.fields = fields;
        return this;
    }
}

import java.util.Map;

import org.apache.storm.task.OutputCollector;
import org.apache.storm.task.TopologyContext;
import org.apache.storm.topology.OutputFieldsDeclarer;
import org.apache.storm.topology.base.BaseRichBolt;
import org.apache.storm.tuple.Fields;
import org.apache.storm.tuple.Tuple;

/**
 * @author cwc
 * @date 2018年5月30日  
 * @description:打印拿到的数据
 * @version 1.0.0 
 */
public class MongoOutBolt extends BaseRichBolt{
	private static final long serialVersionUID = 1L;
	private OutputCollector collector;
	@Override
	public void execute(Tuple tuple) {
				String str =tuple.getString(0);
//				String strs =tuple.getString(1);
				System.err.println(str);
				
	}

	@Override
	public void prepare(Map arg0, TopologyContext arg1, OutputCollector collector) {
		// TODO Auto-generated method stub
		this.collector=collector;
	}

	@Override
	public void declareOutputFields(OutputFieldsDeclarer declarer) {
		declarer.declare(new Fields("MongoOutBolt"));
	}
	
	
}

import org.apache.storm.Config;
import org.apache.storm.LocalCluster;
import org.apache.storm.StormSubmitter;
import org.apache.storm.generated.AlreadyAliveException;
import org.apache.storm.generated.AuthorizationException;
import org.apache.storm.generated.InvalidTopologyException;
import org.apache.storm.mongodb.bolt.MongoInsertBolt;
import org.apache.storm.mongodb.bolt.MongoUpdateBolt;
import org.apache.storm.mongodb.common.QueryFilterCreator;
import org.apache.storm.mongodb.common.SimpleQueryFilterCreator;
import org.apache.storm.mongodb.common.mapper.MongoMapper;
import org.apache.storm.topology.TopologyBuilder;

/**
 * @author cwc
 * @date 2018年6月1日  
 * @description:storm-mongodb的写入，更新，读取
 * @version 1.0.0 
 */
public class MongodbMain {
	private static String url = "mongodb://172.xx.xx.x:27017/test";
	private static String collectionName = "storm";
	public static void main(String[]args){
		
//		lookMongodb(url, collectionName, args);
//		writeMongodb(url, collectionName,args);
		updateMongodb(url, collectionName,args);
	}
	/**
	 * 将数据写入到Mongodb
	 * @param url
	 * @param collectionName
	 */
	public static void writeMongodb(String url,String collectionName,String[] args){
		MongoMapper mapper = new SimpleMongoMapper()
		        .withFields("word", "val","xx");
		MongoInsertBolt insertBolt = new MongoInsertBolt(url, collectionName, mapper);
		
		TopologyBuilder builder = new TopologyBuilder();
		builder.setSpout("mongodb-save", new MongodbSpout(), 2);
		builder.setBolt("save",  insertBolt, 1).shuffleGrouping("mongodb-save");
		
		Config conf = new Config();
		String name = MongodbMain.class.getSimpleName();
		
		if (args != null && args.length > 0) {
		String nimbus = args[0];
		conf.put(Config.NIMBUS_HOST, nimbus);
		conf.setNumWorkers(3);
		try {
			StormSubmitter.submitTopologyWithProgressBar(name, conf, builder.createTopology());
		} catch (AlreadyAliveException | InvalidTopologyException | AuthorizationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		} else {
		conf.setMaxTaskParallelism(3);
		LocalCluster cluster = new LocalCluster();
		cluster.submitTopology(name, conf, builder.createTopology());
		try {
			Thread.sleep(100000);
		} catch (InterruptedException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		cluster.shutdown();
		}
	}
	/**
	 * 更新mongodb数据
	 * @param url
	 * @param collectionName
	 */
	public static void updateMongodb(String url,String collectionName,String[] args){
		MongoMapper mapper =new SimpleMongoUpdateMapper()
				.withFields("word", "hello");
		QueryFilterCreator updateQueryCreator = new SimpleQueryFilterCreator()
                .withField("word");

        MongoUpdateBolt updateBolt = new MongoUpdateBolt(url, collectionName, updateQueryCreator, mapper);
        
        TopologyBuilder builder = new TopologyBuilder();
		builder.setSpout("mongodb-update", new MongodbSpout(), 2);
		builder.setBolt("update",  updateBolt, 1).shuffleGrouping("mongodb-update");
		
		Config conf = new Config();
		String name = MongodbMain.class.getSimpleName();
		
		if (args != null && args.length > 0) {
		String nimbus = args[0];
		conf.put(Config.NIMBUS_HOST, nimbus);
		conf.setNumWorkers(3);
		try {
			StormSubmitter.submitTopologyWithProgressBar(name, conf, builder.createTopology());
		} catch (AlreadyAliveException | InvalidTopologyException | AuthorizationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		} else {
		conf.setMaxTaskParallelism(3);
		LocalCluster cluster = new LocalCluster();
		cluster.submitTopology(name, conf, builder.createTopology());
		try {
			Thread.sleep(100000);
		} catch (InterruptedException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		cluster.shutdown();
		}
	}
	/**
	 * 读取mongodb数据
	 * @param url
	 * @param collectionName
	 */
	public static void lookMongodb(String url,String collectionName,String[] args){
		MongodbSpout spout =new MongodbSpout();
		 MongoLookupMapper mapper = new SimpleMongoLookupMapper()
	                .withFields("word", "hello");
		 QueryFilterCreator filterCreator = new SimpleQueryFilterCreator()
	                .withField("word");
		 MongoLookupBolt lookupBolt = new MongoLookupBolt(url, collectionName, filterCreator, mapper);
		TopologyBuilder builder = new TopologyBuilder();
		builder.setSpout("mongodb-look", new MongodbSpout(), 2);
		builder.setBolt("mongodb-out", lookupBolt, 1).shuffleGrouping("mongodb-look");
		builder.setBolt("out", new MongoOutBolt(), 1).shuffleGrouping("mongodb-out");
		
		Config conf = new Config();
		String name = MongodbMain.class.getSimpleName();
		
		if (args != null && args.length > 0) {
		String nimbus = args[0];
		conf.put(Config.NIMBUS_HOST, nimbus);
		conf.setNumWorkers(3);
		try {
			StormSubmitter.submitTopologyWithProgressBar(name, conf, builder.createTopology());
		} catch (AlreadyAliveException | InvalidTopologyException | AuthorizationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		} else {
		conf.setMaxTaskParallelism(3);
		LocalCluster cluster = new LocalCluster();
		cluster.submitTopology(name, conf, builder.createTopology());
		try {
			Thread.sleep(100000);
		} catch (InterruptedException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		cluster.shutdown();
		}
	}
	
	
}

关于storm读取mongodb暂时还有些问题，因为时间原因 过段时间进行解决。

再看看Trident代码：

import org.apache.storm.Config;
import org.apache.storm.LocalCluster;
import org.apache.storm.StormSubmitter;
import org.apache.storm.generated.AlreadyAliveException;
import org.apache.storm.generated.AuthorizationException;
import org.apache.storm.generated.InvalidTopologyException;
import org.apache.storm.generated.StormTopology;
import org.apache.storm.mongodb.common.mapper.MongoMapper;
import org.apache.storm.mongodb.trident.state.MongoState;
import org.apache.storm.mongodb.trident.state.MongoStateFactory;
import org.apache.storm.mongodb.trident.state.MongoStateUpdater;
import org.apache.storm.trident.Stream;
import org.apache.storm.trident.TridentTopology;
import org.apache.storm.trident.state.StateFactory;
import org.apache.storm.trident.testing.FixedBatchSpout;
import org.apache.storm.tuple.Fields;
import org.apache.storm.tuple.Values;

import com.sunsheen.jfids.bigdata.storm.demo.mongodb.MongodbSpout;
import com.sunsheen.jfids.bigdata.storm.demo.mongodb.SimpleMongoMapper;

/**
 * @author cwc
 * @date 2018年6月5日  
 * @description:Storm-mongodb写入高级接口,写入普通数据
 * @version 1.0.0 
 */
public class MongoTridentState {
	public static void main(String[]args){
		String url = "mongodb://172.xxx.xxx.xxx:27017/test";
		String collectionName = "storm";
		
		Config conf = new Config();
		conf.setMaxSpoutPending(3);
		if (args != null && args.length > 0) { 
			//服务器
			try {
				StormSubmitter.submitTopology(args[1], conf, mongoTrident(url,collectionName));
			} catch (AlreadyAliveException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (InvalidTopologyException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (AuthorizationException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			} else { 
				//本地
		LocalCluster cluster = new LocalCluster();
        cluster.submitTopology("test", conf,  mongoTrident(url,collectionName));
        try {
			Thread.sleep(100000);
			cluster.shutdown();
		} catch (InterruptedException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		}
	}
	/**
	 * 写入到mongodb
	 * @param url
	 * @param collectionName
	 * @return
	 */
	public static StormTopology mongoTrident(String url,String collectionName){
		//测试专用
//		FixedBatchSpout spout = new FixedBatchSpout(new Fields("sentence", "key"), 5000, new Values("the cow jumped over the moon", 1l),
//	            new Values("the man went to the store and bought some candy", 2l), new Values("four score and seven years ago", 3l),
//	            new Values("how many apples can you eat", 4l), new Values("to be or not to be the person", 5l));
//	    spout.setCycle(true);
		MongodbSpout spout =new MongodbSpout();
		
		MongoMapper mapper = new SimpleMongoMapper()
	                .withFields("word");

	        MongoState.Options options = new MongoState.Options()
	                .withUrl(url)
	                .withCollectionName(collectionName)
	                .withMapper(mapper);

	        StateFactory factory = new MongoStateFactory(options);

	        TridentTopology topology = new TridentTopology();
	        Stream stream = topology.newStream("stream", spout);
	        stream.partitionPersist(factory, new Fields("word"),  new MongoStateUpdater(), new Fields());
	        return topology.build();
	}
}

关于storm-mongodb的详解就暂时写到这里，改天有时间再进行补充，研究。