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Caching the MDSPlus Data via Hibernate

Caching the MDSPlus Data via Hibernate. ( Development of “WebScope”). By Ajith M Jose Comp6703 Project Client: Raju Karia Supervisor: Dr. Henry Gardner. Outline. Introduction What is “Hibernate” ? What is “MDSPlus” ? Working of “WebScope” Demonstration Software Requirements

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Caching the MDSPlus Data via Hibernate

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  1. Caching the MDSPlus Data via Hibernate (Development of “WebScope”) By Ajith M Jose Comp6703 Project Client: Raju Karia Supervisor: Dr.Henry Gardner

  2. Outline • Introduction • What is “Hibernate” ? • What is “MDSPlus” ? • Working of “WebScope” • Demonstration • Software Requirements • Client Requirements • Major Issues Faced • Project Planning • Conclusion • Questions

  3. Introduction • my project • retrieve datasets from MDSPlus server using a web GUI • cache data using Java object/relational mapping solution Hibernate • based on the work done by Shi Hu

  4. Hibernate • powerful, ultra-high performance object/relational persistence and query service for Java • uses HDLCA (Hibernate Dual-Layer Cache Architecture) • two levels of cache • Session level- serves one client or session at one time • JVM level- works on a global basis (for different sessions using same instance of JVM) • Can use Hibernate query language (HQL) or native SQL

  5. MDSPlus -millions of datasets are generated during fusion experiments -data storage and management system -developed for fusion researchers -researchers from different parts of the world connect to the MDSPlus using client side applications like “EScope” and “JScope” -they connect to the MDSPlus server and retrieve the required datasets

  6. Current way of retrieving data from MDSPlus • Issues with the current way of retrieving data from MDSPlus • no caching of data • researchers need to wait for the same amount of time even when accessing the previously accessed datasets • longer period to retrieve data • researchers need to install EScope software into their machine

  7. Solution to the issues with retrieving data from MDSPlus WebScope -uses java object/relational mapping solution Hibernate to cache datasets from the MDSPlus so that the researchers can get the datasets quickly -works from a web server and retrieve the MDSPlus datasets ,so that the researchers need not install any specific software to run it.

  8. Development of “WebScope” • WebScope (EScope over web)

  9. Software Requirements • Jakarta Tom Cat 5.0 • Hibernate3.0 • JDK1.5 • HSQLDB • Java Applet enabled Web Browser

  10. Client Requirements • Use the “Hibernate” package to make the data access from the MDSPlus server faster • Allow researchers to retrieve and view the required dataset from the MDSPlus server using a web browser • Obtain information about researchers who use the data from the MDSPlus. • Track the actions of the Researchers • Allow researchers to contribute meta data based on the retrieved dataset • Allow them to view all the user contributed metadata • Software should work on all the platforms

  11. Demonstration

  12. Major Issues Faced • Linux specific issues - due to specific nature of project, used the Linux machine provided by department. - my Linux skills were very basic - had real nightmare in configuring required software packages - thanks to Raju, Henry and Hugh • Learning Curve - Hibernate - Tom Cat - Java Servlets

  13. Project Scheduling • Weekly meeting with my client and supervisor • Had to change the initial time table since I took extra 2 weeks for the software installation and configuration. • Scheduled the work for every week based on the client/supervisor’s feedback • Maintained a work book

  14. Planned Mile Stones

  15. Achieved Mile Stones

  16. Hibernate-Implementation • Uses persistent classes that are mapped to database tables –Example: Message.java • Fields id and text will be converted to corresponding database table fields

  17. Hibernate Mapping file MESSAGES TABLE

  18. Java Code • To store value to the table MESSAGES After the Storage of DataMESSAGES TABLE

  19. Future Work • Implementation of a metadata index based search mechanism • Implementation of a more powerful database (MySql) • Implementation of an administration side which gives special privileges to the administrator • Implementation of an engine which allows the users to create metadata tables dynamically. • Implementation of a new mechanism to plot the graphs (removing applets).

  20. Conclusion • Hibernate package is a very powerful tool to perform caching operations. • It makes the life of programmers easier and the life of users faster. • Through the successful implementation of the “WebScope”, it is now possible for the researchers to quickly access the MDSPlus datasets through a web browser.

  21. Questions ?

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