Rq
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RabbitMQ is a messaging broker that allows applications to connect and exchange messages asynchronously. It provides queuing to decouple applications and ensure scalability. RabbitMQ uses AMQP, an open protocol that defines message formats and rules for exchanging messages. Core components include exchanges, queues, bindings and messages. RabbitMQ supports clustering, high availability, publisher confirmations, and other features.
Rq
- 2. WHAT IS RABBITMQ RabbitMQ is a messaging broker an intermediary for messaging Gives your applications a common platform to send and receive messages a safe place to live until received. 7/12/2013 2 RabbitMQ–Messagingthatjustworks…
- 3. NEED OF MESSAGING Messaging enables software applications to connect and scale Different Component of application can connect to each other Messaging is Asynchronous Decoupling of applications Queuing for delivery Scalability Monitor data feeds 7/12/2013 3 RabbitMQ–Messagingthatjustworks…
- 5. AMQP(ADVANCED MESSAGE QUEUING PROTOCOL) networking protocol that enables conforming client applications to communicate with conforming messaging middleware brokers. AMQP is a Programmable Protocol 7/12/2013 5 RabbitMQ–Messagingthatjustworks…
- 6. AMQP COMPONENTS Broker Channel Exchanges Queues Bindings Messages 7/12/2013 6 RabbitMQ–Messagingthatjustworks…
- 7. EXCHANGE Model.QueueBind(queueName, ExchangeName, queueName+"Key", null) Model.BasicPublish(ExchangeName, keyName, true, false, basicProperties, message); Default Exchange Fanout Exchange Direct Excahnge Topic Exchange quick.orange.rabbit quick.orange.fox lazy.brown.fox quick.brown.fox 7/12/2013 7 RabbitMQ–Messagingthatjustworks…
- 8. QUEUES Name Durable (the queue will survive a broker restart) Exclusive (used by only one connection and the queue will be deleted when that connection closes) Auto-delete (queue is deleted when last consumer unsubscribes) Arguments (some brokers use it to implement additional features like message TTL) 7/12/2013 8 RabbitMQ–Messagingthatjustworks…
- 9. MESSAGES Can be persistent Can have a priority level Message – body +headers Broker never modifies content of message 7/12/2013 9 RabbitMQ–Messagingthatjustworks…
- 10. CONNECTIONS AMQP connections are typically long-lived TCP Connection 7/12/2013 10 RabbitMQ–Messagingthatjustworks… Channels • Connections are multiplexed • lightweight connections that share a single TCP connection • Communication on a particular channel is completely separate from communication on another channel
- 12. PUBLISHER CONFIRMATION Transaction mode –take more than 4 messages to publish 10000 messages Required fsync() both sides Publisher Confirmation mode: 100 times faster than transaction – asynchronous Messages published are put in a set they are queued only when they receive ack 7/12/2013 12 RabbitMQ–Messagingthatjustworks…
- 13. CONSUMER SETTINGS –PREFETCH COUNT 7/12/2013 13 RabbitMQ–Messagingthatjustworks…
- 14. CLUSTERING Clustering connects multiple machines together to form a single logical broker Communication is via Erlang message-passing, so all nodes in the cluster must have the same Erlang cookie and all machines in the cluster must run the same versions of RabbitMQ and Erlang. Virtual hosts, exchanges, users, and permissions are automatically mirrored across all nodes in a cluster. A client connecting to any node in a cluster can see all queues in the cluster, even if they are not located on that node. 7/12/2013 14 RabbitMQ–Messagingthatjustworks…
- 16. MIRRORING QUEUES/HIGH AVAILIBILITY Thus clients consuming from a mirrored queue are in fact consuming from the master. Publish happens on all queues No concept of master/slave for publishing activity In case of failure – message loss from master in case of unsynchronysation Redelivery of messages in case of master failure 7/12/2013 16 RabbitMQ–Messagingthatjustworks…
- 17. OTHER FEATURES OF RABBITMQ Federation Shovel Tracing Management ui etc 7/12/2013 17 RabbitMQ–Messagingthatjustworks…
- 18. RABBITMQ USERS Barclays Bank PLC Cisco Systems, Inc. Credit Suisse Deutsche Börse Systems Envoy Technologies Inc. Goldman Sachs iMatix Corporation IONA Technologies JPMorgan Chase Bank & Co. 7/12/2013 18 RabbitMQ–Messagingthatjustworks… • Microsoft Corporation • Novell • Rabbit Technologies, a joint venture of CohesiveFT and LShift • Red Hat, Inc. • Solace Systems, Inc. • Tervela, Inc. • TWST Process Innovations • WSO2, Inc. • 29West Inc.