public NodeMonitor() {
childListener =
new IZkChildListener() {
public void handleChildChange(String parentPath, List<String> currentChilds)
throws Exception {
if (currentChilds != null) {
initNodes(currentChilds);
}
}
};
List<String> childs =
zookeeper.subscribeChildChanges(ArbitrateConstants.NODE_NID_ROOT, childListener);
if (childs == null) { // 如果为null，代表系统节点为初始化
try {
zookeeper.createPersistent(ArbitrateConstants.NODE_NID_ROOT, true);
} catch (ZkNodeExistsException e) {
// ignore
}
childs = zookeeper.getChildren(ArbitrateConstants.NODE_NID_ROOT);
}
initNodes(childs);
// syncNodes();// 开始监视node节点的变化
MonitorScheduler.register(this);
}
