Examples with NodeCacheListener org.apache.curator.framework.recipes.cache.NodeCacheListener used on opensource projects

Example 1 with NodeCacheListener

use of org.apache.curator.framework.recipes.cache.NodeCacheListener in project Mycat-Server by MyCATApache.

the class ZktoXmlMain method runWatch.

/**
     * 进行zk的watch操作
    * 方法描述
    * @param zkConn zk的连接信息
    * @param path 路径信息
    * @param zkListen 监控路径信息
    * @throws Exception
    * @创建日期 2016年9月20日
    */
private static NodeCache runWatch(final CuratorFramework zkConn, final String path, final ZookeeperProcessListen zkListen) throws Exception {
    final NodeCache cache = new NodeCache(zkConn, path);
    NodeCacheListener listen = new NodeCacheListener() {

        @Override
        public void nodeChanged() throws Exception {
            LOGGER.info("ZktoxmlMain runWatch  process path  event start ");
            LOGGER.info("NodeCache changed, path is: " + cache.getCurrentData().getPath());
            String notPath = cache.getCurrentData().getPath();
            // 进行通知更新
            zkListen.notifly(notPath);
            LOGGER.info("ZktoxmlMain runWatch  process path  event over");
        }
    };
    // 添加监听
    cache.getListenable().addListener(listen);
    return cache;
}

Example 2 with NodeCacheListener

use of org.apache.curator.framework.recipes.cache.NodeCacheListener in project iris by chicc999.

the class MetaManager method doStart.

@Override
public void doStart() throws Exception {
    zkClient.start();
    //注册broker存活
    zkClient.create().creatingParentsIfNeeded().withMode(CreateMode.EPHEMERAL_SEQUENTIAL).forPath(BROKER_LIVE_PATH + System.getProperty(ServerType.Broker.nameKey()) + "_", System.getProperty(ServerType.Broker.nameKey()).getBytes("utf-8"));
    //检测并初始化topic路径
    if (null == this.zkClient.checkExists().forPath(this.TOPIC_PATH)) {
        this.zkClient.create().creatingParentsIfNeeded().withMode(CreateMode.PERSISTENT).forPath(this.TOPIC_PATH, "[]".getBytes("utf-8"));
    }
    //注册监听器
    if (topicCache == null) {
        topicCache = new NodeCache(this.zkClient, this.TOPIC_PATH, false);
        topicCache.getListenable().addListener(new NodeCacheListener() {

            @Override
            public void nodeChanged() {
                try {
                    updateTopic(topicCache.getCurrentData().getData());
                    //添加topic更新事件
                    clusterEventManager.add(new TopicUpdateEvent());
                } catch (IOException e) {
                    clusterEventManager.add(new UpdateExceptionEvent(e));
                }
            }
        });
    }
    //启动监听器
    topicCache.start();
    //检测并初始化broker路径
    if (null == this.zkClient.checkExists().forPath(this.BROKER_PATH)) {
        this.zkClient.create().creatingParentsIfNeeded().withMode(CreateMode.PERSISTENT).forPath(this.BROKER_PATH, "[]".getBytes("utf-8"));
    }
    //注册监听器
    if (brokerCache == null) {
        brokerCache = new NodeCache(this.zkClient, this.BROKER_PATH, false);
        brokerCache.getListenable().addListener(new NodeCacheListener() {

            @Override
            public void nodeChanged() {
                try {
                    updateBroker(brokerCache.getCurrentData().getData());
                    //集群事件管理器添加broker更新事件
                    clusterEventManager.add(new AllBrokerUpdateEvent());
                } catch (IOException e) {
                    clusterEventManager.add(new UpdateExceptionEvent(e));
                }
            }
        });
    }
    //启动监听器
    brokerCache.start();
    clusterEventManager.start();
}