You can build this project with mvn clean install and then execute the it with java -jar storm-app-0.0.1-SNAPSHOT.jar from the target directory.
In my environment I see the following output:
log4j:WARN No appenders could be found for logger (org.apache.zookeeper.ZooKeeper). log4j:WARN Please initialize the log4j system properly. log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
1
3
2
7
5
11
...
3471031
3471283
3471317
3471407
The process runs for 10 seconds and in that time we are able to observe 3.4 million numbers.