| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.alibaba.jstorm.ui.utils; |
| |
| import backtype.storm.utils.NimbusClient; |
| import com.alibaba.jstorm.utils.ExpiredCallback; |
| import com.alibaba.jstorm.utils.TimeCacheMap; |
| import org.apache.commons.lang.StringUtils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Map; |
| |
| /** |
| * @author Jark (wuchong.wc@alibaba-inc.com) |
| */ |
| public class NimbusClientManager { |
| private static Logger LOG = LoggerFactory.getLogger(NimbusClientManager.class); |
| |
| protected static TimeCacheMap<String, NimbusClient> clientManager; |
| |
| static { |
| clientManager = new TimeCacheMap<String, NimbusClient>(3600, |
| new ExpiredCallback<String, NimbusClient>() { |
| |
| @Override |
| public void expire(String key, NimbusClient val) { |
| LOG.info("Close connection of " + key); |
| val.close(); |
| } |
| |
| }); |
| } |
| |
| public static NimbusClient getNimbusClient(String clusterName) throws Exception { |
| Map conf = UIUtils.readUiConfig(); |
| NimbusClient client = clientManager.get(clusterName); |
| if (client != null) { |
| try { |
| client.getClient().getVersion(); |
| LOG.info("get Nimbus Client from clientManager"); |
| } catch (Exception e) { |
| LOG.info("Nimbus has been restarted, it begin to reconnect"); |
| client = null; |
| } |
| } |
| |
| if (client == null) { |
| conf = UIUtils.resetZKConfig(conf, clusterName); |
| client = NimbusClient.getConfiguredClient(conf); |
| clientManager.put(clusterName, client); |
| } |
| |
| return client; |
| } |
| |
| public static void removeClient(String clusterName) { |
| if (StringUtils.isBlank(clusterName)) { |
| clusterName = UIDef.DEFAULT_CLUSTER_NAME; |
| } |
| NimbusClient client = (NimbusClient) clientManager.remove(clusterName); |
| if (client != null) { |
| client.close(); |
| } |
| } |
| |
| public static int getClientSize(){ |
| return clientManager.size(); |
| } |
| |
| } |