Event Bus

Hammurapi Group Event Bus is a Java library for dispatching events to event handlers. It also has forward-reasoning capabilities. Event Bus can be used for complex event stream processing and as a forward-reasoning inference engine.

• Parallel predicate evaluation.
• Parallel handler execution.
• Handler priority.
• One-off handlers.
• Event consumption.
• Event correlation, multi-event handlers.
• Inference
  • Predicate (condition) chaining.
  • Handler (event) chaining.
  • Infinite inference loop detection and prevention.
• Live changes in the bus structure (add/remove handlers).
• Java binding
  • Method and parameter level annotations to wrap Java methods into handlers.
  • Scripted method and parameter level conditions.
• Development and troubleshooting aids
  • Event bus snapshot.
  • Snapshot browser/visualizer.
  • Derivation (inference chain¹⁾) tracking.
• Small footprint.
• Pure Java - no XML or other configuration files, no specialized languages and/or editors.
• Support of memory-sensitive (weak or soft) event store (working memory).

Free for evaluation and non-commercial use. Contact to obtain commercial license.

Alpha.

• Java 6
• Eclipse Helios or above for browsing event bus snapshots (not required for runtime).

Online documentation is available here