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IN MEMORY OBJECT SERVER BASED APPLICATION FOR RAILWAY COMPANIES

IN MEMORY OBJECT SERVER BASED APPLICATION FOR RAILWAY COMPANIES. Milo š Budinský Siemens PSE. ROMAN Modules. ROMAN Ordering (Order Managment) ROMAN Calculation (Runtime Calculation) ROMAN Planning (Timetable Planning) ROMAN Cross Border ROMAN (Cross Border & Cooperative Planning)

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IN MEMORY OBJECT SERVER BASED APPLICATION FOR RAILWAY COMPANIES

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  1. IN MEMORY OBJECT SERVER BASED APPLICATION FOR RAILWAY COMPANIES Miloš Budinský Siemens PSE

  2. ROMAN Modules • ROMAN Ordering (Order Managment) • ROMAN Calculation (Runtime Calculation) • ROMAN Planning (Timetable Planning) • ROMAN Cross Border • ROMAN (Cross Border & Cooperative Planning) • ROMAN Resource (Crew scheduling and dispatching) • ROMAN Anywhere (Timetable Viewer) • ROMAN Products (Timetable Planning Products) • ROMAN Periodic (Synchronized Timetable) • ROMAN Public (Public Timetable) • ROMAN Simulation (Timetable Simulation) • ROMAN Solver (Dispatching & Conflict Resolution) • ROMAN Connect (Interfaces)

  3. Application domain • Users: Railway companies • short term train planning • train dispatching • conflict detection • resolving train conflicts • searching for free train paths • long term train planning

  4. Overview • a Java based technique • a real time in memory system • intranet/internet • client/server application

  5. In memory object server • in memory object server • object graph pre-linked during the server startup • high performance • operation memory resident object server

  6. Topology graph based container • a Railway-Topology-Graph • container keeping other business objects (like trains, runtime tables, design areas, etc.). • most business objects in this application domain are either graphs and its sub-graphs (a country track topology, design areas…) • oriented paths in the graph (trains, runtime tables…).

  7. Object model examples of graph, sub-graph, path DesignArea DASection DALocation Group TrainRunning Train Tracksection Location “Topology Graph based” container

  8. Performance • Fast traversing this pre-linked graph object leads to a high velocity of queries • an easy straightforward implementation of even very complicate business rules.

  9. Example: collecting Train Graph objects DA-sections TrackSections Groups Design Areas TrainRunnings DA-locations Trains

  10. Example: collecting Train Graph objects DA-sections TrackSections Groups Design Areas TrainRunnings DA-locations Trains

  11. Persistence • The persistence layer uses an object oriented XML file system storage • (alternatively this system can be connected with a relational database(s)).

  12. Other features • thin client • Java Webstart desktop application • Servlet (Web Container) – for WWW • Java-RMI – for LAN

  13. What could be target market?Several (very different) directions: Solver or Many types of Viewers (like OBB) or Crossborder like solutions (on the internet?) or Cheap train design package for small companies (public traffic, metro…)

  14. Architecture

  15. In memory Object Server XML Persistence Let’s start from well known picture - J2EE with EJB Thin Client Web Container Servlet JSP Applet / Web-browser EJB Container Application / Webstart DB Server EJB

  16. Current status Thin Client Web Container (Tomcat) In memory Object Server Servlet Applet / Web-browser Application / Webstart XML Persistence DB

  17. Object Cache Web Container (Tomcat) Servlet Object Cache Scalability Thin Client Web Container (Tomcat) In memory Object Server Servlet Applet / Web-browser Application / Webstart XML Persistence

  18. Location Line Train View (DA) Multi-View Block Multi-Block Train-Class Location-Class User Persistent objects representing minimal units for serialization in the current version:

  19. Similar In-memory-objects Approaches • Prevayler (Object prevalence) • JISP - They uses memory resident object-graph server

  20. Data Model

  21. Connection Connection Connection Tracks Line Topology – high level Loc Loc Loc Loc Loc Loc

  22. Topology – Location details Loc

  23. Topology – Location details Location: Node= switch Edge= locTrack

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