In this section, we covered how we can read Twitter tweets using the Twitter streaming API, how we can process the tweets to calculate the tweet text from inputted JSON records, calculate the sentiments of the tweets, and store the final output in HDFS.

With this, we come to the end of this book. Over the course of this book, we have come a long way from taking our first steps with Apache Storm to developing real-world applications with it. Here, we would like to summarize everything that we have learned.

We introduced you to the basic concepts and components of Storm, and covered how we can write and deploy/run the topology in both local and clustered mode. We also walked through the basic commands of Storm, and covered how we can modify the parallelism of the Storm topology at runtime. We also dedicated an entire chapter to monitoring Storm, which is an area often neglected...