org.apache.pulsar.client.api.MessageRouter Maven / Gradle / Ivy
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* 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.pulsar.client.api;
import java.io.Serializable;
import org.apache.pulsar.common.classification.InterfaceAudience;
import org.apache.pulsar.common.classification.InterfaceStability;
/**
* Interface for custom message router that can be passed
* to a producer to select the partition that a particular
* messsage should be published on.
*
* @see ProducerBuilder#messageRouter(MessageRouter)
*/
@InterfaceAudience.Public
@InterfaceStability.Stable
public interface MessageRouter extends Serializable {
/**
*
* @param msg
* Message object
* @return The index of the partition to use for the message
* @deprecated since 1.22.0. Please use {@link #choosePartition(Message, TopicMetadata)} instead.
*/
@Deprecated
default int choosePartition(Message msg) {
throw new UnsupportedOperationException("Use #choosePartition(Message, TopicMetadata) instead");
}
/**
* Choose a partition based on msg and the topic metadata.
*
* @param msg message to route
* @param metadata topic metadata
* @return the partition to route the message.
* @since 1.22.0
*/
default int choosePartition(Message msg, TopicMetadata metadata) {
return choosePartition(msg);
}
}