Google Cloud Platform in Action

Chapter 21. Cloud Pub/Sub: managed event publishing

This chapter covers

• Distributed messaging systems in general
• When and how to use Cloud Pub/Sub in your application
• How Google calculates Cloud Pub/Sub pricing
• Two examples using common messaging patterns

If you’ve ever sent an SMS or Facebook message, the concept of messaging should feel familiar and simple. That said, in your day-to-day use of messaging, you have a few requirements that you sometimes take for granted. For example, you expect that messages are

• sent from one specific person (you)
• sent to exactly one specific person (your friend)
• sent and received exactly once (no more, no less)

Just like people, machines often need to communicate with one another, particularly in any ...