Add RabbitTemplateCustomizer to allow customization of RabbitTemplates

[dangzhicairang]

If there has a more convenient way to configure ConfirmCallback and ReturnsCallback for RabbitTemplate by auto-configure , like declare a bean of ConfirmCallback or ReturnsCallback, so we need not to declare a new bean of RabbitTemplate in extra ConfigClass.

[dangzhicairang]

I got an error when visiting ci.spring.io/builds/240492.

Error code: 1020 Ray ID: 7931a65cbcdc96a1 Country: CN Data center: sjc06 IP: 171.221.64.103 Timestamp: 2023-02-02 08:45:18 UTC 

[wilkinsona]

Our CI environment is being upgraded at the moment so it's likely to be unstable for a while.

[philwebb]

I wonder if we should instead offer a RabbitTemplateCustomizer callback which could be used to attach a ConfirmCallback, ReturnsCallback or perform any other customization.

[wilkinsona]

We already have the RabbitTemplateConfigurer that may confuse things a bit. That said, I'm increasingly favour of the …Customizer based approach over defining numerous beans that are only beans so that they can be set on another bean.

[dangzhicairang]

We already have the RabbitTemplateConfigurer that may confuse things a bit. That said, I'm increasingly favour of the …Customizer based approach over defining numerous beans that are only beans so that they can be set on another bean.

It's right, i will supply a RabbitTemplateCustomizer like @philwebb said.

[mhalbritter]

Thank you!