gocloud.dev/pubsub/rabbitpubsub (go): Package rabbitpubsub provides an pubsub implementation for RabbitMQ. Use OpenTopic to construct a *pubsub.Topic, and/or OpenSubscription to construct a *pubsub.Subscription.  RabbitMQ follows the AMQP specification, which uses different terminology than the Go CDK Pub/Sub.  A Pub/Sub topic is an AMQP exchange. The exchange kind should be "fanout" to match the Pub/Sub model, although publishing will work with any kind of exchange.  A Pub/Sub subscription is an AMQP queue. The queue should be bound to the exchange that is the topic of the subscription. See the package example for details.  For pubsub.OpenTopic and pubsub.OpenSubscription, rabbitpubsub registers for the scheme "rabbit". The default URL opener will connect to a default server based on the environment variable "RABBIT_SERVER_URL". To customize the URL opener, or for more details on the URL format, see URLOpener. See https://gocloud.dev/concepts/urls/ for background information.  RabbitMQ supports at-least-once semantics; applications must call Message.Ack after processing a message, or it will be redelivered. See https://godoc.org/gocloud.dev/pubsub#hdr-At_most_once_and_At_least_once_Delivery for more background.  rabbitpubsub exposes the following types for As:
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