a web service for flexible integration of mobile applications with social networks
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A Web Service for Flexible Integration of
Mobile Applications with Social Networks
Victor Pantoja and Markus Endler
PUC-Rio, Brazil
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Technical advances of mobile technologies and Web have promoted new forms of social interactions
Motivation»
Mobile Social Software (MoSoSo) made social connectivity even more explicit:
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· Extends interpersonal to network interactions through the many-to-many communication paradigm of online social networks.
Virtual and physical worlds are rapidly growing together:
»· Online social networks are increasingly used for interaction
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MotivationCurrent MoSoSo has usually no support for uniform and extensible interaction with online social networks, other web services and mobile middleware systems for context processing.
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Inefficient transfer of information:»· Amount of data transferred· Higher consumption of wireless bandwidth and battery· Example: Google Maps API
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Motivation - Scenario
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Academic Car Sharing Network
Prof. Paul
UniRio Campus
Student Anna
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Motivation - Scenario
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UniRio CampusAcademic Car Sharing Network
Prof. PaulStudent Anna
Pervasive Context:Location, speed, userID
Pervasive Context:Location, userID
Social Context:Anna and Paul have common acquaintaces
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Mobile Social Gateway
Provides a generic interface for optimized information transfer between mobile devices and social networks or other web services
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» Allows third-party Web services to subscribe for a specific context information
» Performance and scalability were major concerns
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ArchitecturePrototypePerformanceConclusion
Agenda1234
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Architecture of MoSoGw
MoSoGw is responsible for filtering, caching and distributing context data from the mobile device to social networks and vice-versa
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The primary goals of MoSoGw are:»· Minimize the amount of data transferred· Allow for some kind of processing of the pervasive and social context data· Provide a uniform interface to the social networks
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Architecture of MoSoGw
SN: Social NetworkWS: Web ServiceCMS: Context Management System
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Architecture of MoSoGw
nginx HTTP server:»· Event-driven architecture· Asynchronous non-blocking I/O· disk cache
Tornado:»· lean Python framework· high performance· non-blocking I/O
Each component was chosen in order to achieve high performance:
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memcached: memory cache
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APIs
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Android Java API»· better suited to mobile app developers· details are hidden behind the Java class abstraction
Allows client applications and third-party web services to be built by using any platform/environment
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REST API:»· applications must know MoSoGw interfaces and URLs
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PrototypeMobile Social Share:»
· Allows mobile users to share context information about their position· Estimates traffic conditions based on users’ velocities· Twitter, Facebook and 3rd Party Apps
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Prototype
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Prototype
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Performance Evaluation
Ubuntu 10.04 with 512MB RAM»
»Simple MoSoGw box:· 1 nginx instance· 1 Tornado instance· 1 MySQL ServerAll the three cache layers described were implemented
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Scenario:»1 - Create a new user2 - Log in with a user3 - Send an invitation to another user4 - Send context information to Twitter
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Performance Evaluation
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Performance Evaluation
Peak of 4.45s but it is quite reasonable to assume that users can wait 4.45s to get a context information update1
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Average: 0.177s
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ConclusionMoSoGw facilitates integration with social networks
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It enables third-party web services to process or match users’ context information and social network data
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Initial usage and performance tests are non-conclusive
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MoSoGw has some promising architectural features.
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· makes it transparent for developers
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Future WorkParallel/distributed deployment MoSoGw and precisely assess its scalability
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Future WorkBetter exploring integration with third party apps
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