Author: Alan Perez-Rathke (alan@spantree.net) This is a simple implementation of the ZooKeeper leader election algorithm as outlined here: http://zookeeper.apache.org/doc/trunk/recipes.html#sc_leaderElection Classes: *ZooElectableClient: - An abstract ZooKeeper client that implements the leader election algorithm. - The method performRole() must be implemented in a child class. This function is intended to contain the work that the client node must actually perform (conditioned on whether or not it is the leader). *ZooTestElectableClient: - A simple demo ZooKeeper client that simply outputs its state after any leader election. *ZooZNodeDeletionMonitor: Based on http://zookeeper.apache.org/doc/current/javaExample.html#ch_Introduction - A monitor that watches for znode deletion and informs its listener when this occurs Scripts (*nix): ./build.sh - will compile the java sources ./run.sh - will run an instance of the test client Usage: The clients assume that a server is running in the background. See: http://zookeeper.apache.org/doc/trunk/zookeeperStarted.html for documentation on downloading and starting a ZooKeeper server. To demo, run multiple client instances (each in separate terminal windows), then kill the leader instance to observe a new leader election.