/**
* @Title: registerListeners @TitleExplain: 向zk注册监听 @Description: 注册监听
*
* @param client
* @author wudan-mac
*/
private void registerListeners(CuratorFramework client) {
/*
* 注册监听者
*/
client
.getConnectionStateListenable()
.addListener(
new ConnectionStateListener() {
@Override
public void stateChanged(
CuratorFramework client, ConnectionState newState) { // 当状态发生变化时通知监听者
logger.debug("CuratorFramework state changed: {}", newState);
if (newState == ConnectionState.CONNECTED
|| newState == ConnectionState.RECONNECTED) {
for (IZKListener listener : listeners) {
listener.executor(client);
logger.debug("Listener {} executed!", listener.getClass().getName());
}
}
}
});
/*
*异常处理
*/
client
.getUnhandledErrorListenable()
.addListener(
new UnhandledErrorListener() {
@Override
public void unhandledError(String message, Throwable e) {
logger.debug("CuratorFramework unhandledError: {}", message);
}
});
}
/**
* connect ZK, register Watch/unhandle Watch
*
* @return
*/
public CuratorFramework mkClient(
Map conf, List<String> servers, Object port, String root, final WatcherCallBack watcher) {
CuratorFramework fk = Utils.newCurator(conf, servers, port, root);
fk.getCuratorListenable()
.addListener(
new CuratorListener() {
@Override
public void eventReceived(CuratorFramework _fk, CuratorEvent e) throws Exception {
if (e.getType().equals(CuratorEventType.WATCHED)) {
WatchedEvent event = e.getWatchedEvent();
watcher.execute(event.getState(), event.getType(), event.getPath());
}
}
});
fk.getUnhandledErrorListenable()
.addListener(
new UnhandledErrorListener() {
@Override
public void unhandledError(String msg, Throwable error) {
String errmsg = "Unrecoverable Zookeeper error, halting process: " + msg;
LOG.error(errmsg, error);
JStormUtils.halt_process(1, "Unrecoverable Zookeeper error");
}
});
fk.start();
return fk;
}
