Y' Mazuryk, y'mazuryktue'nl

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Service Oriented Architecturesin Heterogeneous
Environments

• Yarema Mazuryk

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About Me

• 1994 1999 M.Sc. in Computer Science , National
  University Lviv Polytechnics, Lviv, Ukraine
• 1998 2001 engineer at mobile telecom operator,
  Lviv, Ukraine
• 2001 2003 trainee at Software Technology (OOTI)
  program at TU Eindhoven
• 09.2003 - joined EES.5413 project as a jr.
  researcher

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Context Connected Home
G
G
Wireless LAN
Firewire (IEEE1394)
Bluetooth
Ethernet
Powerline
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Key Aspects
Advanced interaction
Self organizing networks
Minimal (zero) configuration
Privacy
Open protocols
Transparent control
Embedded intelligence
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Service Oriented Architecture - Place
Service1
Client1
Application
Client API
Service API
Client API
Service API
Middleware
Service Oriented Platform
Service Oriented Platform
Transport
Transport
Open protocol
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Service Oriented Architecture Addressed Issues
Interoperability
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Service Oriented Architecture Conceptual Model
Service
Addressing and Naming
name
Service Description
Service Advertisement
Service Implementation
address
address
Service User
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SOA Publish-Find-Bind-Execute Model
Network
Publish
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Provider
Find
2
Consumer
Contract
Bind
3
Execute
4
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Existing Approaches
UPnP JXTA Web services
Can we base on one of these or do we need
something new?
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What is JXTA?
borrowed from www.jxta.org
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JXTA Architecture
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Case Study
Distributed Data Storage in Service-Oriented
Fashion
JXTA
UPnP
...
ANALYZE COMPARE Performance (discovery
latency, memory usage, ...) Scalability Ad hoc
networking Client mobility ...
PROPOSE Service Oriented Framework
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JXTA File Sharing Application Simple
Architecture

• Browse files
• Add, remove files
• Retrieve files

ShareApplication
JXTA Libraries
Application
Service
Advertisement
DirectoryService
DirectoryServiceAdvertisement
DirectoryServiceImpl
DirectoryServiceAdv
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complicated Implementation

• 4 packages
• 15 classes (11 only for JXTA functionality)
• around 1500 LOC

Way too much for such a small application
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And even more

• Around 64 of exchanged data is useless w. r. t.
  functionality (XML tags)
• Migrating to new versions of JXTA is challenging
  (deprecated APIs, lots of bugs)
• Memory requirements around 30MB (without GUI)
• High latency in discovery

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Future Work
Service Oriented Framework for In-Home
Networks - interoperability between various
middleware standards (JXTA, UPnP, Webservices,
) - quality attributes of network services
included - services as building blocks for other
services (scripting language for service
composition) - minimize overhead in network
protocols - transparent mobility of services in
the network
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http//www.win.tue.nl/johanl/projects/EES5413 htt
p//www.win.tue.nl/ymazuryk/projects.html