| /** |
| * 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 storm.kafka.trident; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import storm.kafka.DynamicBrokersReader; |
| import storm.kafka.ZkHosts; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| |
| |
| public class ZkBrokerReader implements IBrokerReader { |
| |
| public static final Logger LOG = LoggerFactory.getLogger(ZkBrokerReader.class); |
| |
| List<GlobalPartitionInformation> cachedBrokers = new ArrayList<GlobalPartitionInformation>(); |
| DynamicBrokersReader reader; |
| long lastRefreshTimeMs; |
| |
| |
| long refreshMillis; |
| |
| public ZkBrokerReader(Map conf, String topic, ZkHosts hosts) { |
| try { |
| reader = new DynamicBrokersReader(conf, hosts.brokerZkStr, hosts.brokerZkPath, topic); |
| cachedBrokers = reader.getBrokerInfo(); |
| lastRefreshTimeMs = System.currentTimeMillis(); |
| refreshMillis = hosts.refreshFreqSecs * 1000L; |
| } catch (java.net.SocketTimeoutException e) { |
| LOG.warn("Failed to update brokers", e); |
| } |
| |
| } |
| |
| private void refresh() { |
| long currTime = System.currentTimeMillis(); |
| if (currTime > lastRefreshTimeMs + refreshMillis) { |
| try { |
| LOG.info("brokers need refreshing because " + refreshMillis + "ms have expired"); |
| cachedBrokers = reader.getBrokerInfo(); |
| lastRefreshTimeMs = currTime; |
| } catch (java.net.SocketTimeoutException e) { |
| LOG.warn("Failed to update brokers", e); |
| } |
| } |
| } |
| @Override |
| public GlobalPartitionInformation getBrokerForTopic(String topic) { |
| refresh(); |
| for(GlobalPartitionInformation partitionInformation : cachedBrokers) { |
| if (partitionInformation.topic.equals(topic)) return partitionInformation; |
| } |
| return null; |
| } |
| |
| @Override |
| public List<GlobalPartitionInformation> getAllBrokers() { |
| refresh(); |
| return cachedBrokers; |
| } |
| |
| @Override |
| public void close() { |
| reader.close(); |
| } |
| } |