Oracle service bus (osb) for the busy it

ORACLE
Service Bus 11g
For the Busy IT Professional DOAG2010
munz & more
Dr. Frank Munz
November 2010

Agenda
1.  Introduction
2.  Service Bus Positioning
3.  Core OSB Features, Development
4.  Monitoring, Security and Clustering
(c) 2009/2010 Dr. Frank Munz / munz & more (Event:DOAG Nürnberg 11/2010) Slide #3

• Frank Munz
• Research in supercomputing and
medical imaging
• Worked for and with TIBCO, BEA and Oracle
• Founded munz & more in 2006
• Focus Oracle middleware …
Who is this guy?
Slide #4(c) 2009/2010 Dr. Frank Munz / munz & more (Event:DOAG Nürnberg 11/2010)

munz & more
http://www.munzanmdore.com

SERVICE
ORIENTED
service bus positioning

Interwoven silos with point to point integration
The Enemy
Portal

RichClient

WebApp

Fraud
Billing
Network
CRM

web
service?
-‐>

General Questions
Where is your business logic ?
What if you need to change it?
How many systems require changes if one
system changes?
Do Web Services help?
-> tight coupling L

Why not use e.g. EJBs then?
Similar situation for EJBs:
• Java only
• Changes in interface require new stubs
-> changes in client jar file

Enterprise Application Integration
(EAI)
EAI tries to solve the integration problem
Examples of EAI System are:
• BEA Weblogic Integration (=WLI, discontinued)
• TIBCO Business Works
• Vitria
• WebMethods

EAI Characteristics
• Addresses the integration problem
-> Supports plenty of technical protocols
• You need to DEPLOY the solution (EAR / JVM)
• Does NOT support real business processes
-> Technical level, NOT business level
-> No long running processes (e.g. 10 years?)
-> Not good in versioning

EAI reduces complexity from O(n*n) to O(n):
One change per system changed.
Reduced Complexity
EAI
-‐>OSB

Portal
RichClient
WebApp

Fraud

FTP

Billing

JMS

Network

EJB

CRM

JAXWS

Business Process Management
(BPM)
BPM deals with business workflows
Ideally: what you design is executable
-> Visio templates do not qualify as BPM
Examples of BPM Software:
• Oracle BPM = Aqualogic BPM = Fuego
• TIBCO IProcess & TIBCO InConcert

BPM Characteristics
• Business architect draws executable workflow
that makes sense for business -> business logic
• Human interaction
• Long running processes
(e.g. 2 yearly vehicle inspection stickers, TÜV)
• Versioning of running processes

Service Bus
• Similar to EAI (same protocols) but
configuration driven
• Service Bus is stateless
• Often replaces EAI:
Weblogic Integration (=EAI) is obsolete now
• You design message flows on a technical level

Service Bus
-> Service Virtualization Layer

Drag and Drop Programming
BPM, EAI and
ESB:
They all have
executable,
graphical flow
diagrams.

Why OSB is not BPM nor EAI
… not a BPM system:
-> neither long running nor stateful nor versioning
… more then an EAI system:
-> configuration driven, registry / repository integration,
SOA focused and better monitoring with SLAs.
OSB typically does NOT host the services

SOA Definition
"Service-Oriented Architecture is an IT strategy
that organizes the discrete functions contained
in enterprise applications into interoperable,
standards-based services that can be combined
and reused quickly to meet business needs."

What is SOA?
SOA = BPM + ESB + X
so what is X? Repository, Registry, Governance, …
and what happened with EAI? often replaced by ESB

ORACLE SERVICE
BUS OVERVIEW
basic features & architecture

Oracle Service Bus
OSB 10gR3
• OSB was BEA Aqualogic Service Bus (ALSB)
• ALSB based on code from Weblogic
Integration (EAI)
• Key product of the BEA acquisition
• Integrates with UDDI V3 registry e.g.
Oracle Enterprise Registry

Unified
RunJme

Policy Manager
Oracle
Service
Bus

Common JCA-based connectivity infrastructure
Web-‐based

console

Mediator

Oracle

WLS

WLIntegraJon

WLI

SQL

SAP
etc.

MQSeries
ALDataServicesPlaPorm

ALDSP

SOAP,
WS

JMS,RMI

DSP,
SOAP
JPD,
SOAP

SOAP,
(s)Tp,
file

XQuery
MQ

Oracle
Tuxedo

Business
Rules

Human

Workflow

BPEL/BPMN

Eclipse
/

JDeveloper

Service Bus Functionality Overview I
• Loose coupling
• Location Transparency
• Dynamic Routing
• Schema Transformation
• Protocol mix and match

Service Bus Functionality Overview II
• Service Aggregation
• Load balancing, Clustering for Availability
• Security
• Monitoring
• Configuration driven

Loose Coupling / Mediation
1.  Clients talk to service bus
(NOT directly to service implementation)
2.  OSB intercepts call = Service Mediation
3.  OSB calls service implementation
OSB acts as "service virtualization layer"
OSB can adapt/change message in step 2.

Proxy and Business Service
Oracle
Service
Bus

ProxyServiceB
BusinessServiceY
Client2
ServiceImpl2

BusinessServiceX
ProxyServiceA
ServiceImpl1

ServiceImpl1

Client1


Location Transparency
OSB uses Business Services
Business Service =
How to talk to service implementation
This configuration can by changed anytime.

Transport and Binding Layer
Oracle
Service
Bus

ProxyServiceB
BusinessServiceY
Client2
ServiceImpl2

BusinessServiceX
ProxyServiceA
ServiceImpl1

ServiceImpl1

Client1

Transport

Binding

Transport

Binding


Context Variables
logical
variable
Purpose

$header SOAP
header
for
SOAP

Else:
empty
<soap:Header/>

$body SOAP
body
for
SOAP

Else:
<soap:Body>
with
enJre
payload

$attachements SOAP
a`achements

$fault typed
error
informaJon

$inbound service,
transport
and
security
informaJon
of
inbound

protocol

$outbound outbound
protocol

$operation current
operaJon

Variables are filled automatically

Message Flow in Proxy
Pipeline
Stage
Action
Request path
Response path
Routing Node
Route Node
A
A
A
A
R R
A
A
A
A
A
A
A
A
A
A
request response

Overview Actions
Flow Control Message Processing
Routing

Log Action
Logs Xquery expression with annotation text
and severity level to stdout.
OSB console:

Dynamic Routing
Routing based on runtime conditions:
• Outcome of call to another service
• Logical expression
• Content of message body
• Content of transport header

Schema Transformation
• XSD schema -> XSD schema
• binary (MFL) -> XSD schema
• XQuery or XSLT
Example:
Transform SAP address format to company-wide
address format.

Eclipse: XQuery Mapper
Import Xquery from Eclipse as OSB resource

Xquery Join
for $priceRequest in $priceQuote1/ns2:priceRequests/ns2:priceRequest,
$availRequest in $availRequest1
where data($priceRequest/ns2:widgetId) =
data($availRequest/ns0:widgetId)
return
<quoteResponse>
<unitPrice>
{data($priceRequest/ns2:price)}
</unitPrice>
<requestedQuanity>
{data($availRequest/ns0:requestedQuanity)}
</requestedQuanity>
</quoteResponse>
}

Protocol Adaption
Oracle
Service
Bus

ProxyServiceB
BusinessServiceY
ﬁle
File

BusinessServiceX
ProxyServiceA
email

JMS

email

EJB

Tuxedo


JMS Endpoint URI

OSB Admin Interfaces
• Prior to version 3 only web based GUI
• Web based GUI for configuration based runtime
changes, monitoring and management.
No deployment necessary!
• WLS admin console for underlying configuration
• Eclipsed based development started with
OSB 3.0 -> different development process

OSB Console
http://host:port/sbconsole used for:
Operations
Development
Monitoring
Search
Import / Export
Testing

Eclipse Console

MONITORING
what is happening inside?

Questions addressed
How long does it take to execute this service on
average?
Send me an alert if takes 5 times longer.
What was the longest execution time ever?
How often is the login service on average called
during 10 minutes?

Server Health
Click on Server Snapshot for per server view

Service Health
• Overview -> click Name for details
• Select services with error

Detail: Service Metrics

Operation Metrics
Good result for jitterAndMem implementation:
(errors are provoked with illegal test data)

Detail: Action Metrics

SLA Conditions
Depend on type count vs. min/max/avg
Conditions can be combined

Reporting Console
Search for reports via key
Purge all reports or range asynchronously

SECURITY
inbound, outbound, authorized & single signed on

2 Scenarios...
Web Services Security Pass-Through:
• Proxy ignores WS-Security header, payload encrypted
• OSB forwards message to service implementation
Active intermediary:
• Security header examined
• Encrypted messages get decrypted at proxy service
ProxyService
BusinessService
Client
ServiceImpl


Message Level Security
Based on WS-Security Standards
Use WS-Policy assertion to request message
level security for proxy service
• Authentication
• Integrity
• Confidentiality
Example: Secure credit card details only

Transport Level Security
Protocols like http, ftp, jms over SSL
Easier to configure
Endpoint to endpoint only
-> messages are not encrypted in between

Service
Impl

SAML and WLS / OSB
SAML Pass-Through =
• OSB = passive intermediary
• OSB forwards SAML token to service impl.
Active intermediaryOracle
Service
Bus

AuthenJcator

SAML

CredenJal

Mapper

Client

SAML

IdenJty

Asserter


CLUSTERING OSB
availability, load balancing and throttling

Oracle
Service
Bus
Cluster

Managed
Server1

Managed
Server2

WLS
Cluster

Distributed OSB Cluster
ProxyService
BusinessService

ServiceA

BusinessService
ProxyService

ServiceA

ServiceA

Load
Balancer

Clients

Clients

Clients


Throttle
Limit number of concurrent messages to business
service.
Exceeding messages put in non-pers. queue.
Queue full or expiration drops messages with
error message

New in OSB 11g
• WLS 10.3.3 installation then
OSB 11g with Oracle Unified Installer
• Same MW_HOME as SOA Suite
• Coherence result cache:
One single cache for all business services
• JCA Adapter from SOA suite 11g supported

New in OSB 11g
• Message flow starts own JTA TX
• JEJB = native EJB inbound
Proxy service exposed as stateless session bean
• EJB 3 supported (finally…)
• SOA-DIRECT protocol for SOA suite interaction
• Multiple email endpoints for load balancing

Questions?

Middleware and Cloud Computing Book
Published!

Oracle WebLogic 12c Book

… more ?
Win a copy of the book!
http://www.munzandmore.com/blog
Come to my Cloud Computing Talk:
-> today @3pm, in this room

munz & more
Training and Consulting
•  WebLogic Admin Training 9 – 12c
•  WebLogic Monitoring and Tuning
•  Oracle Service Bus Training
•  Cloud Training (AWS, Google, Oracle Cloud)

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