This presentation at the AFITC 2009 (Air Force Information Technology Conference, August 24 - 27, 2009), Montgomery, Alabama by Sumedha Rubasinghe covered how you can deploy enterprise integration faster and easier with the WSO2 ESB.

1. Leveraging Open Source Integration
with
WSO2 Enterprise Service Bus
Sumedha Rubasinghe
2009 Air Force Information Technology Conference
Montgomery, Atlanta

2. Agenda

The Need

Introduction

Features

Important Concepts

Extendibility

Performance

Use cases

Getting started & Help
2

3. 3

4. 4

5. 5

6. 6

7. 7

8. Busbar
8

9. 9

10. Introducing Mattson ...
Hi..
Mattson here..
I am an architect
10

11. So.. What is WSO2 ESB?
11

12. WSO2 Enterprise Service Bus

A fast,Light weight, easy-to-use Enterprise
Service Bus product

Open source product with commercial support
(if required)

Released with business friendly Apache License
2.0

Based on Apache Synapse

Customizable to match the needs of your
Enterprise
12

13. wait..
What is Apache Synapse?
How is it related to WSO2
ESB?
13

14. Apache Synapse & WSO2 ESB

Leading project developed by Apache
community

Some of the key committers with in WSO2

WSO2 ESB is built on top of Apache Synapse

Synapse provides the core mediation
capabilities

WSO2 ESB uses Synapse's configuration
language
14

15. Screenshots
15

16. Screen shots
16

17. Screen shots
17

18. In what type of scenarios
Can I use WSO2 ESB?
18

19. Usage scenarios

Link legacy files to messaging based systems

Transform CSV or EDI formats to XML

Act as a high-performance XML Gateway

Content-based routing and creating virtual
services

Integrate FIX based trading systems with XML
and non-XML backends

Log, trace and audit live systems
19

20. Tell me some of the
main features of WSO2 ESB
20

21. WSO2 ESB Features

Message Routing

Message Transformation & Mapping

Scheduled Tasks

Orchestration

Protocol Switching

Transaction Support

Eventing
21

22. Message Routing

Act as a simple Proxy
22

23. Message Routing

Content based routing
23

24. Message Transformation & Mapping

XSLT
24

25. Message Transformation & Mapping

XQuery
25

26. Message Transformation & Mapping

E4X
26

27. Message Transformation & Mapping

Support for different file formats
– EDI
– flat files
– CSV
– COBOL/Record
27

28. Tasks

Allow the ESB to initiate work on a timed basis

Cron/simple interval

Write your own tasks
28

29. Orchestration

Aggregate
29

30. Orchestration

Disaggregate
30

31. Orchestration

Callout
31

32. Orchestration

If/Then/Else
32

33. Orchestration

BPEL Feature plug-in
– Adds BPS capabilities into ESB
33

34. interesting...
34

35. Protocol Support
35

36. Protocol Support

File, (S)FTP, HTTP(S), REST, Hessian, JSON

SOAP

JMS
– MQSeries, AMQP/ Apache Qpid,Apache
ActiveMQ
– Transactional support

Email, XMPP,FIX,TCP
36

37. Rule based Mediation

Drools
37

38. Many more features ...

Load balancing

Fail-over handling

Caching / Throttling

Registry based Clustering

WS-Reliable Messaging

FIX

CEP (Complex Event Processing)

and many more....
38

39. What if I want more?
Can I extend WSO2 ESB?
Yes.. you can..
Just write a mediator..
39

40. Mediator ..!!
what is that?
40

41. Important concept - Mediator
• Basic component of ESB
• Mediates messages going through
• Core mediators
– Send, Drop, Log, Property
• Filter mediators
– Filter, Switch, Validate, Throttle, In, Out
• Transformation mediators
– XSLT, Header, Fault, XQuery
• Advanced mediators
– Clone, Cache, Aggregate, DBLookup, Callout
41

42. Important concept – Send Mediator
• Used to send out the messages
• Used in almost all the cases
• Wrapped an endpoint
– if no endpoint is specified, anonymous 'To'
address will be taken as the EPR
42

43. Important concept – Sequence
• Special mediator
– List of mediators to be executed in an order
• Pipeline pattern
• Special sequences
– main
– fault
43

44. Important concept – operation modes
• Act as a proxy
• Main Sequence
– If none of the proxy services matches the
request pattern
44

45. I would like to have few
more mediator examples..
45

46. Extendibility – Java Mediator
• Class implementing the Mediator interface
– Or AbstractMediator class
– Custom mediator is executed through the
ClassMediator in ESB
– Corresponding setter methods in the custom class
will be set before executing the custom mediator
if any properties are specified
46

47. Extendibility - POJOCommand
• Extends the mediation capabilities using the
well known command pattern
– Class implementing the Command interface or
a POJO with a void execute() method
– execute() method will be invoked using the
Command interface or by using reflection
– Sets the properties before execution and
retrieves the properties after execution
47

48. Extendibility – Script Mediator
• Enables scripting for extending mediation
• Supports all the Apache BSF scripting languages
– JRuby, Jython, Groovy, Java Script
• Embed the script inline or can be referred to a
separate script file with the function name to
be executed
48

49. Extendibility – Spring Mediator
• Spring configurations to extend the mediation
• Spring bean must implement the Mediator
interface
• Refer to the spring application context using
the key
• The Spring bean is managed by the spring
context at mediation time
49

50. Extending WSO2 ESB

Registry as a repository
– Loading configuration from external registry

New Transports
50

51. So how does all of these fit
together?...
What happens with-in WSO2
ESB?
51

52. Architecture
52

53. Runtime
53

54. Deployment
54

55. Performance

Completely asynchronous architecture internally

Streaming support for messages

100% error free and zero memory leaks under heavy load

Up to 4500tps out-of-the-box for proxying
– Intel(R) Xeon(TM) 3.20GHz 2MB Cache
– Dual Core - 2 CPU system
– 2GB RAM
– 1Gb Ethernet

http://wso2.org/library/3740
55

56. Performance

http://wso2.org/library/3740
56

57. Non-Blocking IO
Synapse
Incoming req
Request
Thread1 processing Outgoing req
Socket open
Socket open
TIME
TIME
TIME
TIME
Incoming resp
Response
Thread2 processing
Outgoing resp
This model means:
1. Synapse threads never blocked during normal processing
2. Number of sockets open >> number of threads
57

58. Monitoring

Monitor System statistics

Running logs

Message Tracing

Dynamically configurable Logger

Exposes statistics via JMX

Dashboard – Google Gadgets
58

59. I would like to see some
Use cases where all of
these are applied...
59

60. Use Case 1
• Problem
– I want to send a notification email whenever there
is a request to a particular service which satisfies a
set of conditions over the request
• Solution
– Filter the messages over the request and evaluate
the conditions
– If the conditions evaluate to true then clone the
message
– Send the request to the desired endpoint while
forwarding a copy (may be after transformation) 60
through the mail transport

61. Use Case 1
61

62. Use Case 1 - configuration
62

63. Use Case 2
• Problem
– I have a service exposed over HTTP transport and
now I want the same service to be accessed through
JMS
• Solution
– Expose a proxy service with JMS (and what ever
transport) and switch the transport to HTTP (if not
http)
– Invoke the actual service with HTTP transport
– Switch the transport back to JMS of the response
message 63

64. Use Case 2
64

65. Use Case 2 - Configuration
65

66. Use Case 3
• Problem
– I want the ESB to invoke several services of the
same type for a request, evaluate all the responses
and respond me with the best one
• Solution
– Clone the message and send the requests to
different endpoints
– Get the responses from all services and aggregate
the responses
– Select the best out of the aggregated responses and
respond to the client
66

67. Use Case 3
67

68. Use Case 3 - Configuration
68

69. Use Case 3 - Configuration
69

70. Use Case 3 - Configuration
70

71. Use Case 3 - Configuration
71

72. Use Case 3 - Configuration
72

73. Use Case 4
• Problem
– I have a non secure service and now I want to
expose this service with security
• Solution
– Expose a proxy service
– Add security to that proxy service and specify the
policy on which you want to enforce security
– Invoke the actual service without security by
removing security headers in the request comes to
the proxy
– Add security for responses from the actual service 73
to client

74. Use Case 4
74

75. Use Case 4 - Configuration
75

76. Use Case 5 - FIX to HTTP transport
http://wso2.org/library/3837
76

77. Use Case 6 - Eventing
•http://wso2.org/library/articles/fusion-eventing-soa
•http://wso2.org/library/articles/fusion-eventing-soa-part-2-eventing-using-
synapse-wso2esb 77

78. Use Case 7
78

79. WSO2 Product Platform
79

80. That's lot of information...
Now I would like to try these out
myself. How do I get started?
80

81. How to get started?

Download binary distribution from
http://wso2.org/projects/esb/java

Latest is v2.1.0

Unzip
• Run bin/wso2server.sh (on Unix) or
bin/wso2server.bat (on Windows)
• Management console
– https://localhost:9443/carbon
– admin/admin
81

82. Help.. I messed it up...
82

83. How to get help?

Online forum

Active community of external users

Ample free documentation on wso2.org

If needed, we provided commercial support on
– Getting started
– Deployment
– Custom development
– Production support
83

84. I would like to have some
URLs for reference.
84

85. Useful references
 WSO2 Oxygen Tank for Web Service Developers
– http://wso2.org

WSO2 ESB project page
– http://wso2.org/projects/esb

Performance testing
– http://wso2.org/library/3740
– http://wso2.org/library/2259
– http://wso2.org/library/1721

Apache Synapse
– http://synapse.apache.org
85

86. Summary
•Hypothetical Enterprise
•Brief Introduction on WSO2 ESB
•Features
•Important concepts
– Mediators
– Sequence
•Extendibility
•Use cases
•Getting started & Help
86

87. Thank you
sumedha@wso2.com
(on behalf of WSO2 ESB team)
87