嵌入式迁移Storm业务

操作场景

该任务指导用户通过嵌入式迁移的方式在Flink的DataStream中嵌入Storm的代码，如使用Storm API编写的Spout/Bolt。

操作步骤

1. 在Flink中，对Storm拓扑中的Spout和Bolt进行嵌入式转换，将之转换为Flink的Operator，代码示例如下：

   //set up the execution environment 
   final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();  
   
   //get input data 
   final DataStream<String> text = getTextDataStream(env);  
   
   final DataStream<Tuple2<String, Integer>> counts = text 
   
     //split up the lines in pairs (2-tuples) containing: (word,1)            
     //this is done by a bolt that is wrapped accordingly            
     .transform("CountBolt",                     
       TypeExtractor.getForObject(new Tuple2<String, Integer>("", 0)),                     
       new BoltWrapper<String, Tuple2<String, Integer>>(new CountBolt()))           
     //group by the tuple field "0" and sum up tuple field "1"            
     .keyBy(0).sum(1);  
   // execute program                 
   env.execute("Streaming WordCount with bolt tokenizer");

2. 修改完成后使用Flink命令进行提交。

   flink run -class {MainClass} WordCount.jar