Introduction

Publishes a fixed total number of messages to a RabbitMQ queue. The messages are distributed evenly across the attack duration — for example, 100 messages over 10 seconds publishes approximately 10 messages/second. The effective rate is: numberOfMessages / duration.

For rate-based publishing (messages per second), use Publish (Messages / s) instead.

Use Cases

• Generate a known number of messages to create queue backlog, then verify consumers can catch up.
• Publish test messages to a queue while injecting faults, and verify delivery success rate.
• Inject a burst of messages to test consumer throughput under load.

Parameters

Parameter	Description	Default
Duration	How long the publisher runs. The total number of messages is distributed evenly across this duration.	30s
Number of Messages	Total number of messages to publish across the entire duration. The publishing rate is this value divided by the duration.	1
Exchange	Optional. The AMQP exchange to publish to. Defaults to the default exchange (empty string), which routes directly to the queue.
Routing Key	Optional. The routing key used for message delivery. Defaults to the queue name if empty.
Message Headers	Optional. AMQP message headers to include in the message properties. Specified as key-value pairs.
Body	The message body. Every message uses this same value.	test-message
MaxConcurrent	Maximum number of parallel publish requests in flight at once. Min: 1, Max: 10.	1