In order to cater to the increased demand for reliable and flexible systems, enterprises are leveraging messaging as a solution. In the enterprise integration space, these solutions have evolved into well defined enterprise integration patterns (EIPs). WSO2 Enterprise Service Bus (WSO2 ESB) and WSO2 Message Broker can be used to implement these patterns with ease. This webinar will discuss how to use WSO2 ESB and WSO2 Message Broker to address the aforementioned needs. The key areas of discussion will include how to Achieve scalability using point-to-point, publisher/subscriber EIPs and shared subscriptions Achieve reliability using transactions Perform request throttling using the store/forward EIP Integrate between devices in constrained environments (low-bandwidth, unreliable networks, etc.)

1. Taking Your Enterprise to the Next Level with
WSO2 MB and WSO2 ESB

2. Agenda
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● Introduction to ESB
○ What is ESB in the context of SOA
○ Role of the ESB
○ What is an ESB ?
● Introduction to MB
○ Role of Message Broker in Service Integration
○ Messaging Models – Queues (Point to Point)
○ Messaging Models – Publish/Subscribe
○ Messaging Models – Shared Subscriptions
○ Messaging Concepts – Delivery & Acknowledgements
○ WSO2 Message Broker (Design)
○ WSO2 MB differentiator
● Integrating ESB with the Message Broker
● JMS Terminology
● Flexibility
● Throttling
● Reliability
● Protocol Switching JMS - MQTT
● Message Broker Features
● What’s coming up next

3. About the Presenters
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๏ Shafreen Anfar senior software engineer WSO2
๏ Pamod Sylvester Associate Technical Lead WSO2

4. What is ESB in the context of SOA
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● Modern Enterprises
○ Comprised of so many systems and services
○ Built based on open standards, custom built, acquired from a third
party, part of a legacy system or any combination of these.
● Integration
○ Organizations are moving away from MONOLITHIC systems.
○ Multiple systems connected with SOA as the blueprint.

5. Role of the ESB
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● Service Integration

6. Role of the ESB
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● Spaghetti Integration
○ What about maintainability, scalability, troubleshooting and governance

7. Role of the ESB
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● ESB in action

8. What is an ESB ?
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● An ESB is a middleware solution that enables interoperability, among
heterogeneous environments using a service oriented model
● Stateless and Seamless Integration
● Standard protocols/formats like SOAP, REST, JSON
● Transports like HTTP/S, JMS, TCP, VFS (and many more)

9. Sender Receiver
Role of Message Broker in Service Integration

10. Messaging Models - Queues (Point to Point)
• Verify the Order
• Ship to Address
• Update Stocks
• Acknowledge Message

11. Messaging Models- Publish/Subscribe

12. Messaging Models – Shared Subscriptions

13. Messaging Concepts – Delivery &
Acknowledgements
At most once: Message would be delivered to its best performance, less reliable
At least once: More reliable than At most once. Duplicated could occur
Exactly once: Most reliable option. Ensures a message is delivered to its receivers
only once

14. WSO2 Message Broker (Design)
• Avoid routing messages over the network multiple hops
• Use storage to share messages between nodes.
• Use distributed coordination to control the behavior (i.e. Hazelcast)
• Leaner deployment layout ( and clustering story)

15. WSO2 MB differentiator
• Simplified clustering story (- Queues/Topics)
– Users don’t have to worry about how brokers transmit messages in
the cluster.
• RDBMS for persistence →Easy to manage and use
• Simpler Cluster deployments → Minimum deployment effort +
maintenance.

16. Java Message Service (JMS)
● A specification that define a standard API for java programmer to
perform messaging by interacting with a message broker
● It does not define the message format or how java API interacts with
the message broker
● Enables communication that is
○ Flexible and Agility
○ Asynchronous - JMS provider can deliver messages as they
arrive, client does not have to request messages.
○ Reliable - The JMS API ensures that a message is delivered
once and only once
Integrating ESB with the Message Broker

17. JMS Terminology
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● Message Consumer, Producer and Broker
Message
Producer
Message
Consumer
Message
Broker
dest = (Destination) jndiContext.lookup(destName);
queue = (Queue) jndiContext.lookup(queueName);
MessageProducer producer = session.createProducer(dest);
TextMessage message = session.createTextMessage();
message.setText(“Hello”);
producer.send(message);
dest = (Destination) jndiContext.lookup
(destName);
queue = (Queue) jndiContext.lookup(queueName);
MessageConsumer consumer = session.createConsumer
(dest);
Message m = consumer.receive();

18. Flexibility and Agility
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● Producer/Consumer

19. Flexibility and Agility
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● Synapse configuration for Consumer

20. Flexibility
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● Synapse configuration for Producer

21. Throttling
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● Store/Forward Pattern
○ Asynchronous/One-way Messaging
○ Guaranteed Delivery and Rate matching
○ JMS Message broker as the persistence store – WSO2 MB, Apache
Active MQ etc.

22. Throttling
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● Store/Forward Requesting Matching

23. Reliability
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● Store/Forward - Guaranteed Delivery

24. Reliability
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● Store/Forward - Guaranteed Delivery

25. Reliability
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● Store/Forward - In order delivery

26. Reliability
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● JMS Transactions

27. Reliability
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● JMS Transactions

28. Reliability
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● JMS Synchronous invocation

29. Protocol Switching JMS - MQTT
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JMS
Producers
JMS
Consumers
JMS
Topic
MQTT
Topic
MQTT
Consumers

30. Message Broker Features
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• Protocols/Specifications : JMS 1.1, AMQP 0-9-1, MQTT 3.1.1
• Simplified Clustering Story (and related concepts)
• Databases : MySQL, MSSQL, Oracle, PostgreSQL, H2
• Real time statistics
- Quickly figure out bottlenecks in a production deployments.
- Database read/write latencies
- Inbound/Outbound event rates
- Number of Connections/Channels etc.

31. What’s coming up next
WSO2 Message Broker
• Support for AMQP 1.0 and JMS 2.0
• Improvements to Storage Scheme, Performance improvements
• Analytics for MB
• Move Carbon 5
• Improved GUI
• MQTT + Websockets
WSO2 Enterprise Service Bus
• JMS 2 support
• Distributed Transactions on JMS producer side
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32. Thank you!
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