Partnership in Global Learning

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Partnership in Global Learning
Distributed Document Database
Renato Campos Mauro Rubens Nascimento
Melo rmauro,rubens_at_inf.puc-rio.br
Catholic University Rio de Janeiro - Brazil
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Agenda

• Introduction and the prototype
• Distribution Model
• Document database
• Technology
• Conclusion and Future Work

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Partnership in Global Learning
The Partnership in Global Learning (PGL) is an
unprecedented initiative, international in scope,
designed to produce technologically enhanced and
distributed learning on a global scale. A
university and corporate distance learning
alliance using techniques and tools to create
borderless classrooms
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Partnership in Global Learning
The Partnership in Global Learning (PGL) is an
unprecedented initiative, international in scope,
designed to produce technologically enhanced and
distributed learning on a global scale. A
university and corporate distance learning
alliance using techniques and tools to create
borderless classrooms
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The Prototype
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The Prototype
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The Prototype
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The Prototype
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The Prototype
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The Prototype
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The Prototype
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Partnership in Global Learning
The Partnership in Global Learning (PGL) is an
unprecedented initiative, international in scope,
designed to produce technologically enhanced and
distributed learning on a global scale. A
university and corporate distance learning
alliance using techniques and tools to create
borderless classrooms
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The distribution Model
1) User sends a query to a local web site
Web Server
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The distribution Model
2) Web server calls (local) query executor
Web Server
Query Executor
Local web service
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The distribution Model
3) Query executor looks for documents on local
database and ...
Query Executor
Local Document Database
Local web service
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The distribution Model
4) ... and sends the same query to the other
network sites
Query Executor
Local Document Database
Local web service
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The distribution Model
5) Each network site has an unique identifier
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Query Executor
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Local Document Database
Local web service
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The distribution Model
6) Each network site has a route table
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Query Executor
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The distribution Model
7) Query Executor sends the same query for each
site in the route table
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Query Executor
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Query Format

• Site id
• Where the query was created (first site).
• Transaction id
• Unique for each site id.
• Query
• String representing the query.
• Listener URL
• URL for web service that will receive results.

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Listener

• Web service that receives query result
• Implementation of Observer Design Pattern

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Query Executor
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Remote Query Executor
Query Listener
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Query Executor
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The distribution Model
8) Each Executor sends object identifier to Query
Listener running in the first site.
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Query Listener
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The distribution Model
9) User receives the query result
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Query Listener
Web Server
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Web-Services Specification
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The distribution Model

• Autonomous sites
• 100 Distributed Data
• Same service interface in each site
• Directory Replicated
• Each site has its own routing table

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Example
WebServices
Html / JSP pages
Site 3
Html.ppt Aspnet.ppt
Site 2
BD
Html / JSP pages
Html.ppt Java.ppt
BD
Site 1
Java.ppt Aspnet.ppt
BD
PPT to DDD
Html / JSP pages
WebServices
WebServices
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The System Use Cases
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Technology

• Java, JSP and Servlets
• Portability
• Web-Services
• Compliant to standard -- easy to integrate with
  other tools and languages ( .net, php, etc ... )
• Apache Lucene
• Text indexing
• JDBC
• Structured Data

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Conclusion and Future Work

• Main contribution
• The Distributed Architecture using web-services
• Working prototype
• Shares Presentation Documents (PPT)
• Reuses documents and part of documents
• Distributed Implementation compliant to standards
• (JDBC, Web-Services)
• Future Work
• Include new classes of documents (ms-word doc,
  pdf, etc)
• Security Issues

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Questions?