RabbitMQ training | RabbitMQ online training – global online

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RABBITMQ TRAINING
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GLOBAL ONLINE TRAININGS

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RabbitMQ

• RabbitMQ is the message broker that implements
  the advanced message queuing protocol (AMQP). It
  standardizes messaging by defining producers
  brokers and consumers the advantage of messaging
  is that it increases loose coupling and
  scalability.
• RabbitMQ is one of several message query
  libraries that are used to communicate
  efficiently and loss lessly in a scalable
  distributed system when we need to build app that
  needs to send email talk to a data base validate
  data in to a million things all at once a
  distributed system architecture, lets all of
  these tasks are happen in their own time and not
  hold up the entire application.

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AMQP architecture

• AMQP architecture consists of a publisher an
  exchange of one or more queues and one or more
  consumers. The messages that are being passed
  around can be in any format including XML or even
  just plain text or it could be like serialized
  objects or something like that.
• And the publisher publishes message to the
  message broker, the message broker this could be
  a schedule task set to run at a given interval or
  it could be the result of an action like making a
  payment or sending a message in a can application
  or something like that and so the message broker
  consists of an exchanges and one or more queues.

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• The exchange takes the message and its going to
  direct it to the appropriate queue, the queues
  have consumers which consumed the messages in the
  queue and these are kind of workers that are
  waiting for new things to do so if message the
  queue has no consumers then the messages will
  stick around and the queue will obviously grow if
  more messages keep getting added to it and
  usually scaling the number of consumers to handle
  the workload as the rate of the new messages in
  the queue or the message increase the scaling
  this is pretty straight forward.

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Working of MQ

• In working of MQ, it has a producer and the
  consumer between them is queue. The producer
  sends a message to the queue however never use
  queue directly instead, uses an exchange
  publishing a message means that product sends a
  message to the exchange and the exchange
  forwards the message to a queue. Consuming a
  message then means that consumer picks up a
  message from a queue and consumes it an
  exchange would make much sense if we only had one
  queue.
• However in more complex application, can have
  multiple queues. When an exchange receives
  message it sends it to selected queues. An
  exchange connects via a binding and the binding
  key message the producer needs to specify a
  routing key. How an exchange compares the two
  keys depends on the type of the exchange.

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• The fan out simply ignores the routing queue and
  sends the message to all the queues it knows
  about direct exchanging sign to choose where the
  routing key is exactly the same as the binding.
  The topic exchange allows batches of keys,
  finally theres a header exchange that uses the
  message header instead of the routing key.
• In rabbitMQ exists once kind of exchange the
  default or nameless exchange this exchange
  compares the routing key with the queue and not
  the binding key and when the routing key matches
  exactly the name of the queue, it forwards the
  message to this queue.

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