aaron-ai commented on code in PR #342: URL: https://github.com/apache/rocketmq-clients/pull/342#discussion_r1109879111
########## java/client-apis/src/main/java/org/apache/rocketmq/client/apis/consumer/PullConsumer.java: ########## @@ -0,0 +1,134 @@ +/* + * 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.rocketmq.client.apis.consumer; + +import java.io.Closeable; +import java.io.IOException; +import java.time.Duration; +import java.util.Collection; +import java.util.List; +import java.util.Optional; +import org.apache.rocketmq.client.apis.ClientException; +import org.apache.rocketmq.client.apis.message.MessageQueue; +import org.apache.rocketmq.client.apis.message.MessageView; + +public interface PullConsumer extends Closeable { + /** + * Get the consumer group of the consumer. + */ + String getConsumerGroup(); + + /** + * @param topic the topic that needs to be monitored. + * @param listener the callback to detect the message queue changes. + */ + void registerMessageQueueChangeListenerByTopic(String topic, TopicMessageQueueChangeListener listener); + + /** + * Fetch message queues of the topic. + */ + Collection<MessageQueue> fetchMessageQueues(String topic) throws ClientException; + + /** + * Manually assign a list of message queues to this consumer. + * + * <p>This interface does not allow for incremental assignment and will replace the previous assignment (if + * previous assignment existed). + * + * @param messageQueues the list of message queues that are to be assigned to this consumer. + */ + void assign(Collection<MessageQueue> messageQueues); + + /** + * Fetch messages from assigned message queues specified by {@link #assign(Collection)}. + * + * @param timeout the maximum time to block. + * @return list of fetched messages. Review Comment: Yes, it works across message queues/topics, and unless otherwise specified, the API is aimed at collections rather than individual queues/topics. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
