1. Distributed Event Processing With Java Shared Object Spaces
Shared Event
Space
Basic Idea
System is set of distributed software components
Shared object space holds distributed state
Shared event space for distributed coordination
Events refer to shared objects
Analyze program to understand object referencing
Optimizations
Find and exploit point-to-point interactions
Optimizations for objects shared only by colocated components
Improved failure handling
Transactions to ensure state remains consistent
Combine object and event delivery to minimize windows of vulnerability to failures
Subscribe
Publish
Components
Impact
Clean but powerful programming model
Shared object space enables easy sharing of data between components, supports quick reconfiguration of system
Shared event space supports large variety of communication patterns, enables rapid integration of new components
Our technology provides needed analyses and transformations
Replaces general abstractions (good for programmer) with specialized efficient implementations (good for system)
Gives insight into communication and interaction patterns
Accomplishments and Status
System implementation in MIT Flex compiler system
Transaction system design and implementation underway
Event system design underway
Object referencing analyses in design and implementation
Basic pointer and escape analysis prototype
Advanced design-based analysis under development
Martin Rinard, Daniel Jackson, MIT Laboratory for Computer Science