Summary
This chapter covered how Apex is a reliable platform for stream processing that is highly available and provides accuracy of results. Two of the most important aspects for production-quality stream data processing are fault tolerance and end-to-end exactly-once guarantees, and these turn out to be strong points of Apex and key differentiators.
Up to this point, the book has emphasized Apex as a platform and framework overall. The next few chapters will be examples and focus on application development.