Do « more » Features Quality Do « better » Faster Cheaper Complexity Efficiency Features...
Transcript of Do « more » Features Quality Do « better » Faster Cheaper Complexity Efficiency Features...
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SOA & Integration
13 décembre 2007Eric SAMSON, CTO - XCALIAStève SFARTZ, MICROSOFT France
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The innovation cycle
Do « more »FeaturesQuality
Do « better »FasterCheaper
Co
mp
lexi
ty
Eff
icie
ncy
Fea
ture
s
Ease
Breakthrough
Standards
?
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Cumulative innovation
1990 1995 2000 2005 2010 2015
Mainframe
Client-Server
J2EE
SOA
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Innovation rarely replaces
but rather complements
older technologies!
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Innovation & IT Architectures
In terms of IT architecture, innovation consists of being more flexible while not decreasing quality of service
Do more, faster, more cheaply, more easilyKeep scalability, security
Based on the recurrent notion of « decoupling »Identify and separate concerns, skills Introduce well-defined layers, tiers, with replaceable solutions
New layersIncrease flexibility, butDecrease agility as well (new interfaces to manage)Jeopardize « Quality of Service »
New interfaces
Network cost
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1970: Mainframes
1-tier architectures, everything in a single placeComponent model: formsProcedural languagesHierarchical and network databasesNo networkGreen screens
Business
Logic
Business
Model
GUI
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1990: Client-server
2-tiers architectures, the DB in a separate serverComponent model: tablesProcedural languages, 4GLRelational databasesThe downsizing
Unix, local networksWindows clients
Business
Logic
Business
Model
GUIWindows Unix
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1993: Distributed systems
CORBA2*-tier architectures, distributed applicationsComponent model: distributed objectsObject languagesUnix, IIOP
Business
Logic
Business
Model
GUI
Business
Logic
Business
Model
GUI
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1998: Application Servers
J2EEComponent model: EJB entities3-tier architectures, the application in a separate serverJava, then .NetInternet, XML, thin clients
Business
Logic
Business
ModelGUI
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2005: Services
SOAComponent model: Services4-tier architectures, the application in 2 separate layersESB, WSDLInternet, rich clients
Business
Logic
Business
Model
GUI Services
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SOA Emerges as New Foundation
Increase business agility and decrease IT costsRapidly respond to changing business needs
Reduce development effortReuse of business knowledge
Manage heterogenous information systems
Get the most of our legacy and mainframe assets
Easily scale IT infrastructure
Flexible application architecture
Enable incremental deploymentEase of maintenance
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Services are Not New
Same architecture as used in typical mainframe environments
• Save mainframe resources
• Re-use / publish business logic
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Common mistakes in architectures
Services won’t replace objects
Components and objects are different thingsComponents needs more than an architecture
Culture, repository, semantic metadata, brokers
The network bandwidthInternet is still slowIf services are just components over the Internet
Then SOA is already dead
How to reconcile SOA and integration?
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Common mistakes around SOA
Forgetting dataThere is always a database behind a service
Transactions, security, scalabilityWe will never have 100% of data accessed only through services
Mix services and databasesUnified view of database and service required
Forgetting ScalabilityThousands of services (internal /external, legacy / new)
Metadata, Repository, Dynamic compositionTransactions
Forgetting FlexibilityBAM, optimize cost of execution AdaptabilityDo not hardcode in BPELDiscover new services
Forgetting HeterogeneityDifferent services technologies, not only Web ServicesNot only one service for a form
Composite applications, Complex M-N relationships between service consumers and providers
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Migrating to SOAIntegration of databases & Data Services faces many challenges
Ease of development• Automatic mapping between
model and database• Transparent manipulation• Transparent navigation• High Performance• Caching• Dynamic Optimization
Pain ! Facing exactly the same issues as
with manual DB programming before O/RM
Encapsulation of database access via services
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The real SOA layers
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GUI, Presentation
Applications, Processes
Services
Data sources
GUI, Presentation
Applications, Processes
Services
Data sources
Xcalia Intermediation:
Transparent, unified mapping
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Threats for SOA (1)
Heavy development (manual and tedious calls to services)
When thousands of data services have to be accessedPoor software design (regression to procedural coding)Hard-coded business processes (BPEL…)
Performance issuesDifficult tuning (services are black boxes)Gartner's hype curve
Tech Trigger inflatedExpectations
Disillusion Enlightment Productivity
maturity
visi
bilit
y
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SOA
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Threats for SOA (2)
See for instanceExploring the Dark Side of SOAs, Robbie Clark, Dec. 2004, http://www.ftponline.com/weblogicpro/2005_01/magazine/features/rclark/ Is SOA really just the same old architecture?, Ben Ellingston, Mar. 2005, http://searchwebservices.techtarget.com/originalContent/0,289142,sid26_gci1065615,00.html and http://www.theserverside.com/news/thread.tss?thread_id=32417 Is SOA Really The Future or Just So Much Hype?, Paul Ballard, Jan. 2005, http://theserverside.net/news/thread.tss?thread_id=31222 Should SOAs be developed top down or bottom up?, Nitin Bharti, Mars 2005, http://www.theserverside.com/news/thread.tss?thread_id=32807 Beyond SOA: Principles of Service Engineering, Mark Davydov, Aug. 2004, http://www.ftponline.com/javapro/2004_09/magazine/features/mdavydov/ Troubleshoot Your SOA, Robbie Clark, July 2004, http://www.ftponline.com/javapro/2004_07/magazine/features/rclark/ Avoid Dead-End SOAs, Franck Martinez, Sept. 2004, http://www.ftponline.com/ea/magazine/fall2004/columns/soainsights/ SOA: debunking 3 common myths, Tarak Modi, Sept. 2004, http://www.ftponline.com/ea/magazine/fall2004/features/tmodi/
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What Is Required?
A new way to access and integrate heterogeneous data sources in a service-oriented way to compose new business applications
Key requirements:
Transactional capabilities and performance must be preserved
End-to-end mapping of all resources with the business layer
No impact into application source code
No impact on data sources
Metadata to describe services and how they interact at runtime
Dynamic composition of data services including transactional updates
Databases and data services resources are easily made available for reuse
Data access is configured, not coded, to save time and cost
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Requirements for effective SOA
In order to be successful a move to SOA imposes Best Practices
Methodology
Agility is keyCo-existence and integration with previous architectures is importantContinuous move and architecture flexibility
New productsService Metadata standard and repository
Topology, cartography, taxonomy of SI
Orchestration, CompositionScalable and transactional heterogeneous data access / integration
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Data Integration, the future of EIM*
O/R mapping is necessary but not sufficientSOA plays a fast-growing role
Disconnected mode is imposed by Web ServicesDynamic mapping (mapping of unknown models)Emerging SDO standard
Mainframes are still there for longService-oriented versus Database-oriented data sources
Production constraints are importantNeed for optimization featuresNeed for dedicated & configurable administration console
Enterprise Information ManagementNew tools to access Services are requiredIntegration of Heterogeneous Data SourcesTransactional and ScalableVirtual Federation of Data, Metadata Hub Towards a Data Access Server
(*) Ted Friedman, Gartner, January 2005
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The need for a Data Bus
InfoQ: Incorporating Enterprise data into SOA (Nov. 2006)The 451 Group study (Dec. 2006)Integration has to re-invent itself
Metadata is seen as more and more criticalProprietary EAIs evolves into standardized ESB EII (XML or SQL) is nice for reporting
Mostly read-only, does not fit with requirements of transactional Composite Applications
Services bring flexibility but won’t replace databasesMix SOA and J2EE/.Net, databases and servicesServices as business interfaces in front of databases are new data providersManually calling thousands of services will quickly become unmanageable
Composition/aggregation of fine-grained data servicesStatic versus dynamic (coded versus configured)
SOA, Integration and Persistence are merging Composite Applications and BPM require intermediation
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Expenses in the SOA market
ESB; Expenses; 24; 24%
Data Services; Expenses; 19;
19%
BAM; Expenses; 12; 12%
Security; Expenses; 12; 12%
Portal; Expenses; 16; 16%
BPM; Expenses; 12; 12%
Repository; Expenses; 5; 5%
22 Source: GCR 2006
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Intermediation: more mature SOA
SOA introduces a new layer Bringing more Flexibility and allowing to do more
At a cost: Complexity & ScalabilityDecreasing Agility
Intermediation makes SOA easier and betterF
eatu
res
Ease
3-tiers
SOAXIC
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2006: Intermediation
XIC DASComponent model: Services & Objects (POJOs)5-tier architectures, the data & service intermediation serverVirtual federated data sourcesMetadata, repository, dynamic adaptive composition
Business
Logic
GUI
Business
Model
Intermediation
ServicesServices
Business
Process
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Xcalia intermediationWhat it is, how it works… Data Access Service, connected and disconnected transactions, mapping of data services
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Xcalia IC
Synchronous
Transactions
• Metadata
• Cache
• Mapping
• Dynamic Composition
• Dynamic tuning
ES
B, E
AI
The complexity of integration
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Composite
Application
odbms
xml
rdbms
Middlewares
Business
Process
Applications
Web servicesMainframe
Reporting
toolDisconnectedData-oriented
Business Model(XML, SDO…)
ConnectedObject-orientedBusiness Model
EII
ORM
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Intermediation: how it works.
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BusinessApplication Xcalia IC
• Transactions• Queries• Cache• Metadata• Transformations• Business semantic
RDBMS,XML…
Web Service,mainframe,
applications… … cust = order.getCustomer(); cust.setStockSymbol(“C1”); …
SQL…
SOAP, JCA…
Customer ?
Transparent delegation to Xcalia intermediation
Dynamic selection of the best sequence of services to call
Connected object model (POJO): Transparent, unified & standardized access to databases and data services.
order
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XIC & SDO / DAS
Client applications (Java, .Net, BPEL…) are manipulating enterprise information through the Xcalia Data Access Service (DAS). This is a generic Web service, giving dynamic access to enterprise information (SDO, XML…) in a disconnected model through mapping with a published business model.
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Java / .Net
Application
Xcalia DAS RDBMS,XML…
Web Service,mainframe,
applications…
do { … das.fetch(« customer1 »);
… das.applyChanges();
}
SQL…
SOAP, JCA…
Explicit calls to the remote Xcalia Data Access Service Generic Xcalia Data
Access Web ServiceStandard Xcalia IC mapping
XMLSDOs
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Xcalia Intermediation
• Non-intrusive
• Composite application connectivity
• App-to-data
• App-to-services
• Service-to-service
• Service-to-data
• Data-to-data
• App to-data + services + applications
• Transactional, dynamic, adaptive
EII (Information Integration)
• Data-to-data connectivity
• Distributed query, XML or SQL
based• No programming APIs
• Mostly for read-only
applications and reporting
EAI (Application
Integration)
• App-to-app messaging
connectivity
• Static, Point-to-point
• Dependent on custom
adapters
• Evolves into ESB
From Integration to Intermediation
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ORM (Object relational
mapping)
• Limited to RDBMS
• Limited to POJO
• Limited to connected models
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Connecto
rs
Persiste
nce
Business
Application
Intermediation & ESB
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EAI
RDBMSXML
ODBMS
Serv
iceServ
ice
Components
Serv
ice
mapping
MainframeSAP
Connecto
rsServ
ice
Siebel
ESB
Asynchronous
XML messages
Xcalia IC
Synchronous
transactions
Send
DetectTransform
?
Map
UpdateAccess?
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WS
ESB
Data
source
s Data
Servi
ces
Xcalia
Interm
ediation
•Cach
e, metadata, m
apping
•Dyn
amic co
mposition
XIC into an Application Platform Suite
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Business
Laye
r
• Presentation, P
ortals
• Busin
ess Lo
gic
• Busin
ess Se
rvice
s
• Busin
ess M
odels
Applic.
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Intermediation, integration & SOA
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Inte
gratio
n
EAI, EII,
JCA…
SOA
Web se
rvice
s,
XML, B
PEL
Persist
ence
EJB3, J
DO
Xcalia
intermediationService metadata
Composition of Data & Services
Convergence ofIntegration and Persistencefor Composite Applications in SOA ESB
SD
O
Mappers
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High-level coarse-grained Business Services
MngtApproval
Intermediation & BPM
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CreateAccount
Validate
ComputeLoan
Web
Service
Legacy
Service
Xcalia IC
Fine-grainedData Services
Orchestration
Dynamic composition
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Intermediation
A unique approach to integration in a SOA worldDynamic and adaptiveMaps the application business model to all data sources, support for MDA
Provides unified, standardized and transactional access to heterogeneous data sources
DBMS, XML, Web services, mainframes transactions, packaged applications…
Dynamic composition provides transactions (updates) at runtimeExtended metadata defines data services, where they are and what they are doingLess coding, easily create composite applications
Fits easily into existing infrastructureNon-intrusive into systems, applications or resources
Extends traditional integration solutions to SOAMix SOA and non-SOA, J2EE and .NetMigrate incrementally
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Business Logic
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Xcalia intermediationProduct Offer
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Xcalia Offer
Xcalia Intermediation Core 5Universal Mapping Engine, Engine Trigger, Custom MappersTransaction Management, distributed Queries, CachesJMX administrationPOJO client (JDO2 now, JPA2 later)Default DBMS mapper: RDBMS, XML, ODBMS (Versant), Jalisto
Xcalia DASDAS Server implementation: local and remote protocols (Axis2 or JAX-WS 2)SDO / DAS clients
Java and .Net (including LINQ), static and dynamic APIs
MappersData Services: Web Services, mainframe transactions, packaged applications, JMS, Components (EJB), JavaFramework for mapping non-structured data (XML, COMMAREA, Stored Procs)
Xcalia Studio 5Navilis (testing tool)
JalistoA fast & light 100% Java data store for embedded applicationsContributed to ObjectWeb as open source
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Xcalia Intermediation Core Components
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Xcalia Studio
Java
.Net
Xcalia DAS
Xcalia Intermediation Core Components
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Web Service
Xcalia IC
Conn
ectio
ns
Dat
a Ca
che
Tran
sacti
ons
Dis
t. Q
uerie
s
Map
ping
XIC
Serv
er
laye
r
XIC
Clie
nt
Net
wor
k la
yer
JDO
SDO
Map
pers
Invo
kers
Met
adat
a
DAS
Administration (JMX)
Mainframes, Stored Procs,Applications, Components
Dyn
. Com
pos.
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Xcalia Studio: screenshots
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Xcalia Studio: ease of use
Wizards for the 3 typical approachesTop-down, Bottom-up and Meet-in-the-middle WizardsMake-persistent wizardAuto-mapping feature (based on lowest vocal distance)
Mix of 3 configurable algorithmsReverse engineering of existing database schema
Configurable generation of Java source codeOptional enrichment of incomplete database models
Define Schema tools with schema evolution, SQL output, etc.
NavilisTesting toolPersistent object model browsing (CRUD, queries, business methods)
Multiple mapping filesWorks for ORM and OSM (object to service mapping)
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