By Alexis Richardson
RabbitMQ in motion is a fast moving run via construction and dealing with scalable purposes utilizing the RabbitMQ messaging server. It begins through explaining how message queuing works, its heritage, and the way RabbitMQ matches in. Then it indicates you real-world examples you could follow for your personal scalability and interoperability demanding situations.
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Extra info for RabbitMQ in Action
That a key part of that stack would be distributed messaging seemed obvious to Alexis, who (still in the same office as LShift) started talking to Matthias about AMQP. What was clear to Matthias was that he’d just found the application he’d been looking for to write in Erlang. But before any of this could get started, Alexis and Matthias focused on three questions that they knew would be critical to an open source version of AMQP being successful if it was written in Erlang: 1 2 3 Would large financial institutions care whether their messaging broker was written in Erlang?
To perform a match-all rule you can use the # character: $channel->queue_bind('all-logs', 'logs-exchange', '#'); With that binding, the all-logs queue will receive all the logs published by your web application. Of course for all the previous examples to work you must have declared the queues in advance before performing the bindings. Unlike the * operator, which considers . in the routing key as a part delimiter, the # operator has no concept of parts and considers any . characters as part of the key to match.
Vhosts are so fundamental to the concept of AMQP that you have to specify one when you connect. RabbitMQ makes it easy to get started by including a default vhost called / right out of the box. If you don’t need multiple vhosts, just use the default one. It’s accessible using the default guest username with password guest, though you should change the password for security (more on this in chapter 3). An interesting property of AMQP is that it doesn’t specify whether permissions are per vhost or server-wide.
RabbitMQ in Action by Alexis Richardson