Application Integration, Data Access, and Process Change.
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Transcript of Application Integration, Data Access, and Process Change.
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Application Integration, Data Access, and Process Change
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Thesis
• Service-Oriented Architecture will become an assumed infrastructure
• Web Services will be the near-term technology of choice for SOA deployment
• With planning, SOA can enable real-time processes, allow secure access to data elements, and support distributed development
• The University’s rate of deployment will depend upon central technologies and access policies
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Agenda
• What is Service-Oriented Architecture?
• What are Web Services?
• How will these technologies mesh with NUIT’s architecture plans?
• What steps should application developers and planners be taking today?
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Agenda
• What is Service-Oriented Architecture?
• What are Web Services?
• How will these technologies mesh with NUIT’s architecture plans?
• What steps should application developers and planners be taking today?
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Service-Oriented Architecture
• Distributed functionality exposed as shared, reusable services
• Goal is to streamline deployment, reduce duplication of functions, and allow execution of business processes across diverse application platforms in a network
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“SOA” circa 1970s
• Subroutine/function libraries (IMSL)
• OS services (I/O)
• Tightly-bound to object representation
• Embedded instances
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Network SOA
Ap p lic a tio n A Ap p lic a tio n BS c h o o l
Ap p lic a tio n
Ap p lic a tio n C Ap p lic a tio n D D iv is io nAp p lic a tio n
E x ter n a l P ar tn erX
Un iv e rs ity Ne two rk
C o m m u n ic a tio n I n f r as tr u c tu r e
E x ter n a l P ar tn erY
C e n tra l B u s in e s s Fu n ct io n s
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Agenda
• What is Service-Oriented Architecture?
• What are Web Services?
• How will these technologies mesh with NUIT’s architecture plans?
• What steps should application developers and planners be taking today?
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Web Services for Implementing a Service-Oriented Architecture
• Document-oriented messaging scheme using http/https transport and security
• Documents are self-describing XML streams combining payload and control information
• Separates external interface (behaviors, logic) from internal objects, structures, and implementation (“Loose coupling”)
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A Web Service …
• Has a URL
• Is described through a Web Service Definition Language (WDSL) “contract” for the benefit of potential consumers
• Uses SOAP messages over http/https
• Can be secured based upon polices in the WSDL description or external frameworks
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SOAP Messages
WS-
Sec
urit
y h
eade
r
WS-
Rel
iabl
eMes
sagi
ng h
eade
r
SO AP H e ade rs SO AP B o dy
P aylo ad
SO AP E nve lo pe• XML document• Construction &
decoding within tools and run-time services
• Message may be encrypted via https and/or under WS-Security
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SOAP Interceptors and Handlers
Trans po r t L aye r
M e s s age P ro c e s s ingSubs ys te m
Se r ial izat io n F ram e wo rk
Applic at io n D is patc he r W e b Se rvic e Age nt
T ra ns port In te rc e ptors(e nc ryption , c om pre s s ion , logging . . . )
M e s s a ge In te rc e ptors(va lida tion , tra ns form a tion . . . )
H e a de r P roc e s s or(s e c urity , s e s s ion m gm t, re lia b ility . . . )
X M L to language m apping
After Burton Group
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Web Service Can …
• Be created through:– .NET (Visual Studio)– J2EE authoring environments (Eclipse)– C++ & Visual Basic 3rd party wrapers– PeopleSoft Component Interfaces– PeopleSoft Integration Points
• Be invoked through:– Dynamic discovery (UDDI)– Compiled WSDL definition
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Web Services Require…
• New approaches to development– Services, not components– Flat documents, not structured data– Chunky, not chatty
• New infrastructure– WSDL– UDDI– Enterprise Service Bus / Integration Broker
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Interface Granularity
Inte rac t ive c l ie nt Inte rac t ive s e rve r
Inte rac t ive s e rve rW e b s e rvic e s c l ie ntB us ine s sInte r fac e
Subm it O rde r
C re ate O rde r
Add Ite m
Add Ite m
Add Ite m
P ro c e s s o rde r
After Burton Group
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Web Services for SOA
Ap p lic a t io n A Ap p lic a t io n BS c h o o l
Ap p lic a t io n
Ap p lic a t io n C Ap p lic a t io n D D iv is io nAp p lic a t io n
E x ter n a l P ar tn erX
Un iv e rs ity Ne two rk
Trans po r t o ve r ht tp/ht tps
E x ter n a l P ar tn erY
C e n tra l B u s in e s s Fu n ct io n s
U D D ISe rvic e
W SD LSe rvic e
Inte grat io nbro ke r
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Agenda
• What is Service-Oriented Architecture?
• What are Web Services?
• How will these technologies mesh with NUIT’s architecture plans?
• What steps should application developers and planners be taking today?
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Architectural Direction
• Business Drivers– Security– Mobility– Self-service– Real-time processes– Data availability– Rapid deployment
• Architecture– Central identity and
authentication– Portal navigation– Web-Service
integration– Standards-based
environment– Abstraction or
virtualization
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19 System Architecture
SystemsManagement
Identity Security
Core Enterprise SystemsCore Enterprise Systems
Specialized Enterprise ApplicationsSpecialized Enterprise Applications
School/Department/Division ApplicationsSchool/Department/Division Applications
User Devices
Network
Processing Capacity
Data Management
Integration
Platforms
Business
Framew
ork
I P , Vo I P , h ttp ,w ir e les s , c e llu la r
Ap p lic a tio nS er v er s
Vir tu a l d a tas er v ic es
S er v ic e b u s ,f ed er a tio n
Bu s in es s lo g ic ,c o m p o s ite
ap p lic a tio n s ,s e r v ic e
p r o v id er s an dc o n s u m er s ,
r ep o r t in g
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Abstraction or Virtualization
• Convert an application-specific service into a general infrastructure service
R o le- Bas ed Bu s in es s R u les
E n ter p r is e S er v ic e Bu s
Un if ied I d en tity M an ag em en tan d Au th en tic a tio n
Ap p lic a tio nBu s in es s R u les
Ap p lic a tio nBu s in es s R u les
D atab as es
Ap p lic a tio nBu s in es s R u les
Us er s
P r o c es s in g
F u n c tio n a lUn it
R es p o n s ib ilit ies
ITR
espo
nsib
ilit
ies
ITR
espo
nsib
ilit
ies
—Storage management—Authentication—Authorization—Computing platform—Database
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21 Direct-to-Application Access
Us erp r o f iles
E x tr ac t
M an u al I n te r f ac e
C o d ein te r f ac e
( AP I )
tigh
t-co
upli
ng to
sch
ema
Us erp r o f iles
D atab as eq u er ies
R em o teP r o c ed u r e C all
I m p o r t
Batc h tr an s f er
tight-coupling to layout
C o n s u m in g Ap p lic a tio n ( L M I S , e tc . )
Res
pons
e
Req
ues t
Dow
nloadD a tab as e en g in e
Ap p lic a tio nBu s in es s r u les
Upload
tight-coupling to objects
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22 Repository Virtualization
Us erp r o f iles
E x tr ac t
M an u al I n te r f ac e
Cod
e in
terf
ace
Us erp r o f iles
D atab as eq u er ies ( v iew s )
C o d ed q u er ieso r tr an s ac tio n s Batc h tr an s f er
Dow
nloadPu b
l ish
D a tab as e en g in e
Ap p lic a tio nBu s in es s r u les
R e po s i to ry E ngine
Us erp r o f iles
Updates
S e c u rity p e r im
e te r
R eq u es t &R es p o n s e
E R PAp p lic a tio n
C o ns um ing Applic at io n ( L M IS , e tc .)
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23 Database Virtualization
Vir tual izat io n E ngine
Us erp ro f iles
Us erp ro f iles
Us erp ro f iles
Us erp ro f iles
C o ns um ing Applic at io n ( L M IS , e tc .)
Req
ues t
Response
Ap p A Ap p B Ap p C Ap p D
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24 Web Services Access
Us erp r o f iles
C o d e in te r f ac eAP I
Us erp r o f iles
C o n s u m in g Ap p lic a tio n ( L M I S , e tc . )
D atab as e en g in e
Ap p lic a tio nBu s in es s r u les
E v en t/T r an s ac tio nD is tr ib u to r Us er
p r o f iles
E R PAp p lic a tio n
S er v ic eAb s tr ac tio n
S er v ic e Ab s tr ac tio n
C o d e in te r f ac e AP I
Request/R
e spo nse
Po s
t
P o s t
P u b lis hS u b s c r ib e
X M L
S er v ic ed ef in it io n s& p o lic ies
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25 Web Services Infrastructure
So urc e s ys te m s
E nte rpr is e Se rvic eB us / Inte grat io n B ro ke r
D o wns tre amApplic at io n
E xtrac t /D o wnlo ad
U plo ad
M o nito r ing &po lic y e nfo rc e m e nt
Dat
a T
rans
form
atio
n
Sub scrib eP u
b lis
h
U D D I R e gis tryW SD L R e po s i to ryP o lic y R e po s i to ry
D o wns tre am Applic at io ns
Dir
ect i
n voc
a tio
n
M anage m e nt
R e al- t im em e s s age s
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Abstraction of Business Processes
• The next step after SOA is composite applications and process orchestration– Once individual business functions are
exposed as Web Services, then new “meta-process” coding can be built “above” them
– Combined with workflows, this can substantially automate many functions
– This will be addressed by Business Process Execution Language (BPEL) tools
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27 Meta-Processes
Ap p lic a tio n A Ap p lic a tio n BAp p lic a tio n C Ap p lic a tio n DE x ter n a l P ar tn er
XE x ter n a l P ar tn er
Y
P r o c e s s i ng
Sto r ag e
D atabas e s
Invoca tion
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Distributed Development
p ers onal emp lo yee fac ulty fi nanc ialres earc h
Search 12:34O c to be r 12
c us tomize
(c ) No rthw este rn Univers ity 2003. Send c omments to w ebmaste r@ northw este rn.edu
Op e n e n ro llm e n t u n til 10 /3 1 - se e e m p lo ye e ro le
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E -mail Inb ox15 ne w me ssa ge s
NSF A A -433 (due 10/03) S te m c e ll su r fac e s truc tureNIH A 9943 (due 11/03) P ro te in in te ra c tio ns o n s te mNIH B 8889 (due 1 /04)
mR NA c a ta lytic eff e c ts unde rNSF A B -448 (due 2 /04)
G rant O p p ortunitiesFro m N U Res earc h S erv ic es
NIH A 3773 (e xp ire s 8 /05) ba la nc e $34,567NIH Q 44T 5 (e xp ire s 11 /03) ba la nc e $11,333NSF 4 -44R (e xp ire s 8 /07) ba la nc e $134,987
G rant Informationa s o f 10 /12 09 :00
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B MB C B ho meHuma n G e no me P ro je c tS te m C e ll A C T AC yto lo gy T o da yUC L A ga te w a y
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data access
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Infrastructure
Authored
Application
Database
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Agenda
• What is Service-Oriented Architecture?
• What are Web Services?
• How will these technologies mesh with NUIT’s architecture plans?
• What steps should application developers and planners be taking today?
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What Steps Should Planners and Developers Take Today?
1. Stop buying or creating applications with “silo” approaches – use central services
2. Stop copying data around the network3. Start serious discussions with your users about what
data access services they need and can justify4. Determine your vendor’s plans for Web Service
integration – and influence those plans5. Train your staff on SOA and Web Services6. Talk with NUIT and your NU peers about authoring
tools, test environments, and other infrastructure – don’t “go it alone”
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Stop Copying Data Around the Network
• Problem: send e-mail from within an application to a set of users– Bad: Get all NetIDs and e-mail addresses from SES,
HRIS, SNAP, etc. an include in local database– Poor: Get e-mail addresses for current users every
day and include in local database– Correct: Get user’s e-mail address from directory
service when needed, even in large numbers– Future? Invoke a Web Service to send e-mail
messages based upon standard identity (NetID)
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Forecasts
• New financial system will rely first upon Web Services for integration, but many batch interfaces will take years to change as software is replaced
• Our community will push for real-time processes, and service units will need time to adjust
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Questions?
QA&
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Professional Development Topics
• SOA & Web Services• XML, SOAP & WSDL• OASIS and WS-*
standards• Enterprise Service
Bus (ESB)• Universal Description,
Discovery, and Integration (UDDI)
• Authoring tools for Web Services
• Microsoft .NET versus J2EE solutions
• Business Process Execution Language (BPEL)
• SOA governance
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Suggested Reading
Haddad, Chris, “Web Services and Service Oriented Architecture: Collapsing Boundaries Between the J2EE and .NET Platforms”, Burton Group presentation, 18 Dec 2003.
Katz, Richard, “What Does System Integration Really Mean for Higher Education?”, Educause Review, Sep/Oct 2003.
Kobielus, James, “Orchestrating Web Services: Driving Distributed Process Execution Through Workflow Technology”, Burton Group, 18 Dec 2003.
Manes, Anne Thomas, et al, “VantagePoint 2005-2006 SOA Reality Check”, Burton Group, 29 Jun 2005.
Manes, Anne Thomas, Web Services – A Manager’s Guide, Addison-Wesley, 2003.
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Local Documents
“University System Architecture for Integrated Enterprise Systems” http://www.it.northwestern.edu/bin/docs/UniversitySystemsArchitecture.pdf
“System Management for the e-University” http://www.it.northwestern.edu/bin/docs/systemmgmtforeuniversity.pdf