MessageRouter (Pulsar Client :: API 2.8.1 API)

All Superinterfaces:

java.io.Serializable
```
@Public
@Stable
public interface MessageRouter
extends java.io.Serializable
```
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 Also:

ProducerBuilder.messageRouter(MessageRouter)

Method Summary

All Methods Instance Methods Default Methods Deprecated Methods
Modifier and Type	Method	Description
`default int`	`choosePartition(Message<?> msg)`	Deprecated. since 1.22.0.
`default int`	`choosePartition(Message<?> msg, TopicMetadata metadata)`	Choose a partition based on msg and the topic metadata.

- Method Detail
  - choosePartition
```
@Deprecated
default int choosePartition(Message<?> msg)
```
    Deprecated.
    since 1.22.0. Please use choosePartition(Message, TopicMetadata) instead.
    
    Parameters:
    
    msg - Message object
    
    Returns:
    
    The index of the partition to use for the message
  - choosePartition
```
default int choosePartition(Message<?> msg,
                            TopicMetadata metadata)
```
    Choose a partition based on msg and the topic metadata.
    
    Parameters:
    
    msg - message to route
    
    metadata - topic metadata
    
    Returns:
    
    the partition to route the message.
    
    Since:
    
    1.22.0