public void setPartitionSelector(PartitionSelectorStrategy partitionSelector) {
		this.partitionSelector = partitionSelector;
	}
Set the partition strategy to be used by this bus if no partitionExpression is provided for a module.
@param partitionSelector The selector.
spring-xd-messagebus-spi/src/main/java/org/springframework/xd/dirt/integration/bus/MessageBusSupport.java