Github user gemmellr commented on a diff in the pull request: https://github.com/apache/activemq-artemis/pull/1607#discussion_r146825025 --- Diff: integration/activemq-kafka/activemq-kafka-bridge/src/main/java/org/apache/activemq/artemis/integration/kafka/bridge/GroupIdPartitioner.java --- @@ -0,0 +1,57 @@ +/* + * 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.activemq.artemis.integration.kafka.bridge; + +import java.util.List; +import java.util.Map; + +import org.apache.activemq.artemis.api.core.Message; +import org.apache.activemq.artemis.api.core.SimpleString; +import org.apache.kafka.clients.producer.Partitioner; +import org.apache.kafka.clients.producer.internals.DefaultPartitioner; +import org.apache.kafka.common.Cluster; +import org.apache.kafka.common.utils.Utils; + +public class GroupIdPartitioner implements Partitioner { + + DefaultPartitioner defaultPartitioner = new DefaultPartitioner(); + + @Override + public int partition(String topic, Object key, byte[] keyBytes, Object value, byte[] valueBytes, Cluster cluster) { + Message message = (Message) value; + final SimpleString groupdID = message.getGroupID(); + //If GroupID (a.k.a JMSXMessageGroup) then to honour this we partition based on it. --- End diff -- JMSXGroupID rather than JMSXMessageGroup?
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