RabbitMq , AMQP Model basics

1. INTRODUCTION TO

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…

4. RABBITMQ UNIVERSE
7/12/2013
4
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

11. ACKNOWLEDGEMENT
7/12/2013
11
RabbitMQ–Messagingthatjustworks…

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…

15. RAM/DISK NODES
 forget_cluster_node
7/12/2013
15
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.

19. 7/12/2013
19
RabbitMQ–Messagingthatjustworks…