amqp-consume1

Usage

Overview

amqp-consume consumes messages from a queue on an AMQP server. For each message that arrives, a receiving command is run, with the message body supplied to it on standard input.

amqp-consume can consume from an existing queue, or it can create a new queue. It can optionally bind the queue to an existing exchange.

By default, messages will be consumed with explicit acknowledgements. A message will only be acknowledged if the receiving command exits successfully (i.e. with an exit code of zero). The AMQP “no ack” mode (a.k.a. auto-ack mode) can be enable with the -A option.

Options

-q, --queue=queue name

-e, --exchange=exchange name

-r, --routing-key=routing key

-d, --declare

Forces an exclusive queue to be declared, even when it otherwise would not be. That is, when a queue name is specified with the --queue option, but no binding to an exchange is requested with the --exchange option. Note: this option is deprecated and may be removed in a future version, use the --exclusive option to explicitly declare an exclusive queue.

-x, --exclusive

Declared queues are non-exclusive by default, this option forces declaration of exclusive queues.

-A, --no-ack=routing key

-c, --count=limit

Stop consuming after the given number of messages have been received.

-p, --prefetch-count=limit

Request the server to only send limit messages at a time.

If any value was passed to --count, the value passed to --prefetch-count should be smaller than that, or otherwise it will be ignored.

If -A/--no-ack is passed, this option has no effect.

Examples

Consume messages from an existing queue “myqueue”, and output the message bodies on standard output via cat:

$ amqp-consume -q myqueue cat

Bind a new exclusive queue to an exchange “myexch”, and send each message body to the script myscript, automatically acknowledging them on the server:

$ amqp-consume -A -e myexch ./myscript