Book Image

Apache ZooKeeper Essentials

By : Saurav Haloi
Book Image

Apache ZooKeeper Essentials

By: Saurav Haloi

Overview of this book

Table of Contents (14 chapters)
Apache ZooKeeper Essentials
About the Author
About the Reviewers
Performing Common Distributed System Tasks

The C client library

ZooKeeper is shipped with an official C client library, which can be used to develop distributed applications in C/C++. Many of the other language bindings such as the Python client binding shipped with ZooKeeper distribution are built using the C library. In this section, we will learn about the C client APIs and illustrate their usage by developing a znode data-watcher client.

In the Connecting to ZooKeeper with C-based shell section of Chapter 1, A Crash Course in Apache ZooKeeper, we learned how to build the ZooKeeper C library and the C-based shell using the make command. Once we build the C library, the following two shared libraries get built:

  • The multi-threaded

  • The single-thread

The libraries are usually installed in /usr/local/lib. You need to have this path exported through your LD_LIBRARY_PATH environment variables for the applications to find the libraries.

The multi-threaded library is most commonly...