//tag::ref-doc[] = RabbitMQ Source The "rabbit" source enables receiving messages from RabbitMQ. The queue(s) must exist before the stream is deployed; they are not created automatically. You can easily create a Queue using the RabbitMQ web UI. == Input N/A == Output === Payload * `byte[]` == Options The **$$rabbit$$** $$source$$ has the following options: //tag::configuration-properties[link-to-catalog=true] https://github.com/spring-cloud/spring-functions-catalog/tree/main/supplier/spring-rabbit-supplier#configuration-options[See Spring Functions Catalog for configuration options]. //end::configuration-properties[] Also see the https://docs.spring.io/spring-boot/docs/current/reference/html/common-application-properties.html[Spring Boot Documentation] for addition properties for the broker connections and listener properties. [[rabbitSourceRetry]] === A Note About Retry NOTE: With the default _ackMode_ (*AUTO*) and _requeue_ (*true*) options, failed message deliveries will be retried indefinitely. Since there is not much processing in the rabbit source, the risk of failure in the source itself is small, unless the downstream `Binder` is not connected for some reason. Setting _requeue_ to *false* will cause messages to be rejected on the first attempt (and possibly sent to a Dead Letter Exchange/Queue if the broker is so configured). The _enableRetry_ option allows configuration of retry parameters such that a failed message delivery can be retried and eventually discarded (or dead-lettered) when retries are exhausted. The delivery thread is suspended during the retry interval(s). Retry options are _enableRetry_, _maxAttempts_, _initialRetryInterval_, _retryMultiplier_, and _maxRetryInterval_. Message deliveries failing with a _MessageConversionException_ are never retried; the assumption being that if a message could not be converted on the first attempt, subsequent attempts will also fail. Such messages are discarded (or dead-lettered). == Build ``` $ ./mvnw clean install -PgenerateApps $ cd apps ``` You can find the corresponding binder based projects here. You can then cd into one of the folders and build it: ``` $ ./mvnw clean package ``` == Examples ``` java -jar rabbit-source.jar --rabbit.queues= ``` //end::ref-doc[]