In this chapter, you learned about Apache Curator, which is a high-level wrapper library and framework for Apache ZooKeeper. Curator makes programming with ZooKeeper very simple by abstracting many of the intricacies and also extends it by providing a lot of add-on features and recipes. Curator also makes it possible for legacy applications to use ZooKeeper's capabilities through various extensions. We also looked at Exhibitor to supervise ZooKeeper server instances, and you learned how it can be used for easy configuration of the ZooKeeper ensemble and many other maintenance tasks.

By now, we have almost come to the end of learning the essentials of ZooKeeper. In the next chapter, we will look at how ZooKeeper is being used in other software projects, and we will also look at the tools used to achieve distributed coordination. We will also look at a few examples of how ZooKeeper is used by organizations on their production platforms. This will give you a feel that what you learned throughout this book is actually being used in real-world applications.