| /* |
| * 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.iotdb.db.subscription.agent; |
| |
| import org.apache.iotdb.db.subscription.broker.SerializedEnrichedEvent; |
| import org.apache.iotdb.db.subscription.broker.SubscriptionBroker; |
| import org.apache.iotdb.db.subscription.task.subtask.SubscriptionConnectorSubtask; |
| import org.apache.iotdb.db.subscription.timer.SubscriptionPollTimer; |
| import org.apache.iotdb.rpc.subscription.config.ConsumerConfig; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| public class SubscriptionBrokerAgent { |
| |
| private static final Logger LOGGER = LoggerFactory.getLogger(SubscriptionBrokerAgent.class); |
| |
| private final Map<String, SubscriptionBroker> consumerGroupIdToSubscriptionBroker = |
| new ConcurrentHashMap<>(); |
| |
| //////////////////////////// provided for subscription agent //////////////////////////// |
| |
| public List<SerializedEnrichedEvent> poll( |
| ConsumerConfig consumerConfig, Set<String> topicNames, SubscriptionPollTimer timer) { |
| String consumerGroupId = consumerConfig.getConsumerGroupId(); |
| SubscriptionBroker broker = consumerGroupIdToSubscriptionBroker.get(consumerGroupId); |
| if (Objects.isNull(broker)) { |
| LOGGER.warn( |
| "Subscription: broker bound to consumer group [{}] does not exist", consumerGroupId); |
| return Collections.emptyList(); |
| } |
| // TODO: currently we fetch messages from all topics |
| return broker.poll(topicNames, timer); |
| } |
| |
| public void commit( |
| ConsumerConfig consumerConfig, Map<String, List<String>> topicNameToSubscriptionCommitIds) { |
| String consumerGroupId = consumerConfig.getConsumerGroupId(); |
| SubscriptionBroker broker = consumerGroupIdToSubscriptionBroker.get(consumerGroupId); |
| if (Objects.isNull(broker)) { |
| LOGGER.warn( |
| "Subscription: broker bound to consumer group [{}] does not exist", consumerGroupId); |
| return; |
| } |
| broker.commit(topicNameToSubscriptionCommitIds); |
| } |
| |
| /////////////////////////////// broker /////////////////////////////// |
| |
| public boolean isBrokerExist(String consumerGroupId) { |
| return consumerGroupIdToSubscriptionBroker.containsKey(consumerGroupId); |
| } |
| |
| public synchronized void createBroker(String consumerGroupId) { |
| SubscriptionBroker broker = new SubscriptionBroker(consumerGroupId); |
| consumerGroupIdToSubscriptionBroker.put(consumerGroupId, broker); |
| } |
| |
| /** |
| * @return true -> if drop broker success |
| */ |
| public synchronized boolean dropBroker(String consumerGroupId) { |
| SubscriptionBroker broker = consumerGroupIdToSubscriptionBroker.get(consumerGroupId); |
| if (Objects.isNull(broker)) { |
| LOGGER.warn( |
| "Subscription: broker bound to consumer group [{}] does not exist", consumerGroupId); |
| // do nothing |
| return true; |
| } |
| if (!broker.isEmpty()) { |
| LOGGER.warn( |
| "Subscription: broker bound to consumer group [{}] is not empty when dropping", |
| consumerGroupId); |
| return false; |
| } |
| consumerGroupIdToSubscriptionBroker.remove(consumerGroupId); |
| return true; |
| } |
| |
| /////////////////////////////// prefetching queue /////////////////////////////// |
| |
| public void bindPrefetchingQueue(SubscriptionConnectorSubtask subtask) { |
| String consumerGroupId = subtask.getConsumerGroupId(); |
| SubscriptionBroker broker = consumerGroupIdToSubscriptionBroker.get(consumerGroupId); |
| if (Objects.isNull(broker)) { |
| LOGGER.warn("Subscription: consumer group [{}] does not exist", consumerGroupId); |
| return; |
| } |
| broker.bindPrefetchingQueue(subtask.getTopicName(), subtask.getInputPendingQueue()); |
| } |
| |
| public void unbindPrefetchingQueue(SubscriptionConnectorSubtask subtask) { |
| String consumerGroupId = subtask.getConsumerGroupId(); |
| SubscriptionBroker broker = consumerGroupIdToSubscriptionBroker.get(consumerGroupId); |
| if (Objects.isNull(broker)) { |
| LOGGER.warn("Subscription: consumer group [{}] does not exist", consumerGroupId); |
| return; |
| } |
| broker.unbindPrefetchingQueue(subtask.getTopicName()); |
| } |
| |
| public void executePrefetch(SubscriptionConnectorSubtask subtask) { |
| String consumerGroupId = subtask.getConsumerGroupId(); |
| SubscriptionBroker broker = consumerGroupIdToSubscriptionBroker.get(consumerGroupId); |
| if (Objects.isNull(broker)) { |
| LOGGER.warn("Subscription: consumer group [{}] does not exist", consumerGroupId); |
| return; |
| } |
| broker.executePrefetch(subtask.getTopicName()); |
| } |
| } |