Hazelcast is the heart of Cellar and is used in the core module. The Cellar core module specifies the cluster behavior but does not specify the implementation. The default Cellar implementation is powered by Hazelcast. Cellar directly leverages the Hazelcast features to provide the functionalities expected in the cluster, such as discovering the cluster nodes, communication between the nodes, and distributing the states of the resources in the cluster.
In this chapter, we will deal with the following topics:
An introduction to Hazelcast and its features
An understanding of how Cellar uses Hazelcast
Creating a custom extension to Hazelcast