Elvin Interface for LambdaMOO by Brendan Leong See

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Elvin Interface for LambdaMOO by Brendan Leong See

• 1 Elvin
• Event Notification Service.
• Content Based Routing of Messages.
• Client / Server Interaction over TCP/IP
  Internet.
• Clients can be producers and / or consumers of
  notifications.
• Producers publish notifications consisting of
  attribute, type value tuples.
• Consumers subscribe to notifications with
  attribute, type value tuples.
• Elvin server routes incoming
  notifications to subscribers.

• 2 LambdaMOO
• Virtual Reality Information Environment.
• Networked, multi-player, text-based, object
  oriented.
• MOO MUD (Multi-user Domain), Object Oriented.
• Client / Server Interaction over TCP/IP
  Internet.
• Users interact with each other and objects
  contained in MOO.
• Users can modify the virtual reality environment
  using MOO programming language.

• 3 This project involved
• Re-engineering LambdaMOO as an Elvin client.
• Using Elvins Client Application Programming
  Interface (API).
• Allowing for objects in LambdaMOO to produce and
  consume Elvin events.
• Providing a link for LambdaMOOs virtual
  environment to the real world, and possibly other
  virtual information environments.

Elvin Client (eg Tickertape)
MOO Client (eg player)
TCP\IP
TCP\IP
Internet
Pass notifications
Subscribe notify
Subscribe notify
Deliver notifications

• 4 The outcomes
• MOO players, programmers and objects can
• add delete subscriptions.
• produce notifications.
• receive notifications.

TCP\IP
TCP\IP
Deliver notifications
Subscribe notify
Elvin Server
LambdaMOO Server (an Elvin Client)