private ZkTestSystem() {
LOG.info("~~~~~~~~~~~~~~~ starting zk system ~~~~~~~~~~~~~~~");
try {
_zkServer = new TestingServer(PORT);
_zkClient = ZkTestSystem.createZkClient(_zkServer.getConnectString());
} catch (Exception e) {
throw new RuntimeException(e);
}
LOG.info("~~~~~~~~~~~~~~~ zk system started ~~~~~~~~~~~~~~~");
}
public static ZkTestSystem getInstance() {
if (_instance == null) {
_instance = new ZkTestSystem();
_instance.cleanupZk();
Runtime.getRuntime()
.addShutdownHook(
new Thread() {
@Override
public void run() {
LOG.info("shutting zk down");
try {
getInstance().getZkClient().close();
getInstance().getZkServer().close();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
});
}
return _instance;
}