This model unifies messaging patterns such as the before mentioned publish/subscribe, queues, transactions and streaming while adding extra capabilities such as easily extensible, content-based routing.
Publish/subscribe in this context means the decoupling of producers and consumers: producers do not need to know based on what criteria consumers will receive messages.
Instead users are given the means to establish such concepts by wiring relatively simple AMQ entities together.
These entities are also part of the specification and form a layer on top of the wire level protocol: the AMQP model.
Queues, exchanges and bindings are collectively referred to as AMQP 0-9-1 is a programmable protocol in the sense that AMQP 0-9-1 entities and routing schemes are primarily defined by applications themselves, not a broker administrator.
Channels are independent of each other and can perform different functions simultaneously with other channels, the available bandwidth being shared between the concurrent activities. There are two ways to do it: using a callback or pseudo-synchronous mode.I guess that the require "amqp" module RPC module Base def rabbit(rabbit_callback) rabbit_loop = if ! @do_not_stop_reactor = false do rabbit_end else @do_not_stop_reactor = true rabbit_end end end class Server include Base def run server_loop = do |connection, channel, requests_queue| consumer = AMQP:: Consumer.new(channel, requests_queue).consume consumer.on_delivery do |metadata, payload| puts "[requests] Got a request #. Git Hub issue: #462 Previous behehavior is not unreasonable but is not what many users and even Rabbit MQ team members come to expect. Previously a reconnection counter was preserved between successful recoveries. Git Hub issue: #446 Full change log can be found on Git Hub. Git Hub issue: #465 Git Hub issue: #456 Full change log can be found on Git Hub.In certain situations, for example, when a message cannot be routed, messages may be to publishers, dropped, or, if the broker implements an extension, placed into a so-called "dead letter queue".Publishers choose how to handle situations like this by publishing messages using certain parameters.
Queues are the structures holding messages in a first-in, first-out fashion.