Examples with ChildListener com.alibaba.dubbo.remoting.zookeeper.ChildListener used on opensource projects

Example 1 with ChildListener

use of com.alibaba.dubbo.remoting.zookeeper.ChildListener in project dubbo by alibaba.

the class ZookeeperRegistry method doSubscribe.

protected void doSubscribe(final URL url, final NotifyListener listener) {
    try {
        if (Constants.ANY_VALUE.equals(url.getServiceInterface())) {
            String root = toRootPath();
            ConcurrentMap<NotifyListener, ChildListener> listeners = zkListeners.get(url);
            if (listeners == null) {
                zkListeners.putIfAbsent(url, new ConcurrentHashMap<NotifyListener, ChildListener>());
                listeners = zkListeners.get(url);
            }
            ChildListener zkListener = listeners.get(listener);
            if (zkListener == null) {
                listeners.putIfAbsent(listener, new ChildListener() {

                    public void childChanged(String parentPath, List<String> currentChilds) {
                        for (String child : currentChilds) {
                            child = URL.decode(child);
                            if (!anyServices.contains(child)) {
                                anyServices.add(child);
                                subscribe(url.setPath(child).addParameters(Constants.INTERFACE_KEY, child, Constants.CHECK_KEY, String.valueOf(false)), listener);
                            }
                        }
                    }
                });
                zkListener = listeners.get(listener);
            }
            zkClient.create(root, false);
            List<String> services = zkClient.addChildListener(root, zkListener);
            if (services != null && !services.isEmpty()) {
                for (String service : services) {
                    service = URL.decode(service);
                    anyServices.add(service);
                    subscribe(url.setPath(service).addParameters(Constants.INTERFACE_KEY, service, Constants.CHECK_KEY, String.valueOf(false)), listener);
                }
            }
        } else {
            List<URL> urls = new ArrayList<URL>();
            for (String path : toCategoriesPath(url)) {
                ConcurrentMap<NotifyListener, ChildListener> listeners = zkListeners.get(url);
                if (listeners == null) {
                    zkListeners.putIfAbsent(url, new ConcurrentHashMap<NotifyListener, ChildListener>());
                    listeners = zkListeners.get(url);
                }
                ChildListener zkListener = listeners.get(listener);
                if (zkListener == null) {
                    listeners.putIfAbsent(listener, new ChildListener() {

                        public void childChanged(String parentPath, List<String> currentChilds) {
                            ZookeeperRegistry.this.notify(url, listener, toUrlsWithEmpty(url, parentPath, currentChilds));
                        }
                    });
                    zkListener = listeners.get(listener);
                }
                zkClient.create(path, false);
                List<String> children = zkClient.addChildListener(path, zkListener);
                if (children != null) {
                    urls.addAll(toUrlsWithEmpty(url, path, children));
                }
            }
            notify(url, listener, urls);
        }
    } catch (Throwable e) {
        throw new RpcException("Failed to subscribe " + url + " to zookeeper " + getUrl() + ", cause: " + e.getMessage(), e);
    }
}