| /* |
| * 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 org.apache.ranger.services.kafka.client; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.TimeUnit; |
| |
| import kafka.utils.ZkUtils; |
| import kafka.utils.ZkUtils$; |
| import org.I0Itec.zkclient.*; |
| import org.apache.log4j.Logger; |
| import org.apache.ranger.plugin.client.BaseClient; |
| import org.apache.ranger.plugin.service.ResourceLookupContext; |
| import org.apache.ranger.plugin.util.TimedEventUtil; |
| |
| import scala.collection.Iterator; |
| import scala.collection.Seq; |
| |
| public class ServiceKafkaClient { |
| private static final Logger LOG = Logger.getLogger(ServiceKafkaClient.class); |
| |
| enum RESOURCE_TYPE { |
| TOPIC |
| } |
| |
| String serviceName = null; |
| String zookeeperConnect = null; |
| private static final String errMessage = " You can still save the repository and start creating " |
| + "policies, but you would not be able to use autocomplete for " |
| + "resource names. Check server logs for more info."; |
| |
| private static final String TOPIC_KEY = "topic"; |
| private static final long LOOKUP_TIMEOUT_SEC = 5; |
| |
| public ServiceKafkaClient(String serviceName, String zookeeperConnect) { |
| this.serviceName = serviceName; |
| this.zookeeperConnect = zookeeperConnect; |
| } |
| |
| public Map<String, Object> connectionTest() throws Exception { |
| String errMsg = errMessage; |
| Map<String, Object> responseData = new HashMap<String, Object>(); |
| try { |
| getTopicList(null); |
| // If it doesn't throw exception, then assume the instance is |
| // reachable |
| String successMsg = "ConnectionTest Successful"; |
| BaseClient.generateResponseDataMap(true, successMsg, |
| successMsg, null, null, responseData); |
| } catch (IOException e) { |
| LOG.error("Error connecting to Kafka. kafkaClient=" + this, e); |
| String failureMsg = "Unable to connect to Kafka instance." |
| + e.getMessage(); |
| BaseClient.generateResponseDataMap(false, failureMsg, |
| failureMsg + errMsg, null, null, responseData); |
| } |
| return responseData; |
| } |
| |
| private List<String> getTopicList(List<String> ignoreTopicList) throws Exception { |
| List<String> ret = new ArrayList<String>(); |
| |
| int sessionTimeout = 5000; |
| int connectionTimeout = 10000; |
| ZkClient zkClient = null; |
| ZkConnection zkConnection = null; |
| |
| try { |
| zkClient = ZkUtils$.MODULE$.createZkClient(zookeeperConnect, sessionTimeout, connectionTimeout); |
| zkConnection = new ZkConnection(zookeeperConnect, sessionTimeout); |
| |
| ZkUtils zkUtils = new ZkUtils(zkClient, zkConnection, true); |
| Seq<String> topicList = zkUtils.getChildrenParentMayNotExist(ZkUtils.BrokerTopicsPath()); |
| |
| Iterator<String> iter = topicList.iterator(); |
| while (iter.hasNext()) { |
| String topic = iter.next(); |
| if (ignoreTopicList == null || !ignoreTopicList.contains(topic)) { |
| ret.add(topic); |
| } |
| } |
| } finally { |
| try { |
| if(zkClient != null) { |
| zkClient.close(); |
| } |
| } catch (Exception ex) { |
| LOG.error("Error closing zkClient", ex); |
| } |
| |
| try { |
| if(zkConnection != null) { |
| zkConnection.close(); |
| } |
| |
| } catch(Exception ex) { |
| LOG.error("Error closing zkConnection", ex); |
| } |
| } |
| return ret; |
| } |
| |
| /** |
| * @param serviceName |
| * @param context |
| * @return |
| */ |
| public List<String> getResources(ResourceLookupContext context) { |
| |
| String userInput = context.getUserInput(); |
| String resource = context.getResourceName(); |
| Map<String, List<String>> resourceMap = context.getResources(); |
| List<String> resultList = null; |
| List<String> topicList = null; |
| |
| RESOURCE_TYPE lookupResource = RESOURCE_TYPE.TOPIC; |
| |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("<== getResources() UserInput: \"" + userInput |
| + "\" resource : " + resource + " resourceMap: " |
| + resourceMap); |
| } |
| |
| if (userInput != null && resource != null) { |
| if (resourceMap != null && !resourceMap.isEmpty()) { |
| topicList = resourceMap.get(TOPIC_KEY); |
| } |
| switch (resource.trim().toLowerCase()) { |
| case TOPIC_KEY: |
| lookupResource = RESOURCE_TYPE.TOPIC; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| if (userInput != null) { |
| try { |
| Callable<List<String>> callableObj = null; |
| final String userInputFinal = userInput; |
| |
| final List<String> finalTopicList = topicList; |
| |
| if (lookupResource == RESOURCE_TYPE.TOPIC) { |
| // get the topic list for given Input |
| callableObj = new Callable<List<String>>() { |
| @Override |
| public List<String> call() { |
| List<String> retList = new ArrayList<String>(); |
| try { |
| List<String> list = getTopicList(finalTopicList); |
| if (userInputFinal != null |
| && !userInputFinal.isEmpty()) { |
| for (String value : list) { |
| if (value.startsWith(userInputFinal)) { |
| retList.add(value); |
| } |
| } |
| } else { |
| retList.addAll(list); |
| } |
| } catch (Exception ex) { |
| LOG.error("Error getting topic.", ex); |
| } |
| return retList; |
| }; |
| }; |
| } |
| // If we need to do lookup |
| if (callableObj != null) { |
| synchronized (this) { |
| resultList = TimedEventUtil.timedTask(callableObj, |
| LOOKUP_TIMEOUT_SEC, TimeUnit.SECONDS); |
| } |
| } |
| } catch (Exception e) { |
| LOG.error("Unable to get hive resources.", e); |
| } |
| } |
| |
| return resultList; |
| } |
| |
| @Override |
| public String toString() { |
| return "ServiceKafkaClient [serviceName=" + serviceName |
| + ", zookeeperConnect=" + zookeeperConnect + "]"; |
| } |
| |
| } |