Composing Web Services and P2P Infrastructure

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Composing Web Services and P2P Infrastructure
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PRESENTATION FLOW

• Related Works
• Paper Idea
• Our Project Infrastructure

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RELATED WORK

• Technologies
• P2P Technology-JXTA Framework
• WebServices( UDDI, WSDL, SOAP )
• Recent Work
• SuperPeer Technology
• HyperCuP
• Edutella/JXTA
• RDF Based Peer-To-Peer Networks
• Chatty Web

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P2P NETWORK TOPOLOGIES

• All Peers have equal roles and responsibilities
  in all aspects
• Gnutella, Freenet

• Pure P2P Systems

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P2P NETWORK TOPOLOGIES

• Hybrid Peers

• Search is performed over a centralized directory,
  but download occurs in a P2P manner
• Peers are equal in download only
• Napster

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Super Peers

• Cross between pure and hybrid systems
• A super peer is a node that acts as
• a centralized server to a subset of clients
• Clients submit queries to their super-peers
• Super-peers are also connected to each other as
  peers in a pure P2P system,routing messages to
  each other
• KaZaA

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Super Peers
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HyperCuP / HyperCuPs

• Peers, no superpeers
• Dimension increases incredibly

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Complicated, not well defined, limited range of
usage
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Evaluation of Peer Network Topologies

• Shaping the Network means designing and
  organizing peer
• networks
• Pure P2P inefficient, heterogeneity, limited
  capabilities of peers
• Hybrid the cost of single-node housing the
  centralized index, easy to attack
• Super-Peer
• combine the efficiency of Pure and Hybrid
  systems
• centralized search with autonomy, load
  balancing, roboustness to attacks,
• DESIGN is very important

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Recent Works Edutella /JXTA

• Combining Edutella/JXTA P2P Service Environment
  with Web Services
• Two Way Approach
• Web Services
  Edutella/JXTA P2P Network
• existing Edutella/JXTA P2P Services
  pure Web Service

UDDI Registry Functionality is not well described
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Edutella/JXTA
Edutella/JXTA P2P Services
Web Service Content Provider
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RDF Based Super Peer Networks
VERY WELL DONE WORK
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RDF Based Super Peer Networks

• Critical Points
• Super Peers store metadata for their peers
• Super Peers store routing indices
• SuperPeer Peer
• SuperPeer SuperPeer ( neighbors )
• Super Peers store transformation rules between
  different schemas of its peers
• Super Peer subsets can be built regarding the
  interest areas

Web Service Technology is not handled
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The Chatty Web
New Translation? Know Existing Ones? What TO DO?
HELP!!!

• Routing due to query results
• Circulation
• Able to learn existing mappings
• how? Storage?
• Decision mechanism
• Query parameters are increased, peers have to do
  much work
• (low capacity peers)
• Degree of semantic agreement
• GLOBAL agreement

Point of Failure
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Can it be a Paper Subject ?

• Combination of Gossiping and Super Peer
  Technology
• Super Peer Topology
• based on HyperCuP
• gossiping among SuperPeers ( high capability )
• level of SuperPeers ( no centralization, always
  keep the HyperCuP topology)
• siblings of a SP
• shaping is based on interest and other
  parameters
• Ex In health subject, based on
  location in the World,
• queries can be sent depending on the
  location,
• ( lives in Turkey, has an accident in
  Chine send query to Asia
• SuperPeer, it sends the
  query to Europe SuperPeer )

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• Number of siblings
• Not more than two levels

• New Super Peer joins
• do gossiping with other SPs
• get previous mappings
• add the mapping between his schema and the others
• results in a general schema, very hard
  for ontologies

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HyperCuP of HyperCuPs Joint centralized
and distributed ideas

• Brings the power of
• SuperPeer Technology

• Removes Chatty Web Drawbacks

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OUR PROJECTS

• Main Steps To Decide
• 1.
• Everything is in Edutella similar Environment (
  possible )
• wrap existing web services, join the P2P
  world
• no registries, efficient with appropriate
  topology, simple
• Everything is in WebService Environment
• Composition of Two Technologies
• Leave services as they are, construct a
  mechanism between them
• 2.
• Pure P2P? Super Peers?
• 3.
• Applicable To Different Ontologies? Only One
  Ontology?

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Results

• Only one ontology
• Super Peer Topology
• HyperCuP Shaping
• Proxy Servers contain UDDI registries
• Put Proxies in SuperPeers ( Distributed UDDIs,
  similar to UDDI3 )
• SuperPeers are oriented in HyperCuP topology
• Sibling SuperPeers
• Semantic is handled by means of RDF, OWL,
  etc
• Intelligent Routing( Querying ) Algorithms
• Intelligent Network Shaping
• DO NOT Increase dimension but HyperCuP of
  HyperCuPs
• Joint centralized and distributed ideas

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THANK YOU!