Java Open Source Projects Directory

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Rule Engines

hammurapi-rules

Hammurapi Rules is JSR-94 compliant rules engine. With Hammurapi Rules Java developers don't need to learn a new rules language - rules are written in Java. Hammurapi Rules leverages Java language type system and naming conventions to plug rules into its inference engine.

 

jlisa

JLisa is a powerful framework for building business rules accessible to Java and it is compatible with JSR94 V, the JavaTM Rule Engine API

 

take

Take (aka Mandarax Compiler) consists of a scripting language that can be used to define derivation rules, and a compiler that creates executable Java code and deploys it into running systems. Take is inspired by Mandarax, has a similar API but does not use a separate interpreter "inference engine". The deployment process is very similar to how web servers treat server pages. The result is optimized, reflective and easy to maintain code.

 

jruleengine

JRuleEngine is a java rule engine, based on Java Specification Request 94, release 1.1, i.e. Rules can be loaded by an XML file or by means of JRuleEngine APIs, so rules can be stored externally into a database, too. The distribution consists of a library that can be embedded into a java application, so it can be used in any kind of application (web based or not).

 

jeops-the-java-embedded-object-production-system

JEOPS is a Java based forward chaining RULE ENGINE. This Rule Engine is used to power up the business process by rules in Java Application Servers, client applications, and Servlets.

 

prova-language

Prova (from Prolog+Java) is a rule-based system for Java and agent scripting and information integration extending the Mandarax engine with a proper language syntax and enhanced semantics. The language breaks new ground in combining expressive and declarative programming. It combines natural syntax and typing of Java with Prolog-style rules and database wrappers. Java calls may include both constructor and method calls as wellas access to public variables in classes. Distributed and agent programming transported via JMS or JADE protocols is based on reaction rules specified in a natural syntax. The language makes it easy for agents to engage in concurrent conversations without starting new threads by using reaction and novel inline reaction rules in a very natural and ecoonomic syntax, directly capturing conversations as state machines.

 

termware

TermWare is a rule processing engine intended for embedding into Java applications. TermWare implements terminal systems concept. Main range of applications:

 * problem-oriented languages (or DSL, from domain-specific) development.
 * computer algebra systems.
 * various formal models analysis and transformation.
 * software engineering.

 

zilonis

Zilonis provides a Multithreaded Rules Engine platform and a scripting environment for Java based applications. The core of the Zilonis platform is based on a variation of the forward chainning Rete algorithm described in "Rete: A Fast Algorithm for the Many Pattern/ Many Object Pattern Match Problem", Charles L. Forgy, Artificial Intelligence 19(1982), 17-37.). The implementations follows the optimizations and the structure used in the Soar system, and the ones well described in the paper: "Production Matching for Large Learning Systems", Robert B. Doorenbos. 1995 Multithreaded Capabilities A nice feature and contribution from Zilonis, is that it is multithreaded. Because of that, it is easy to reuse a set of rules across several concurrent users in a safe way, without creating copies of the rules and the engine, as you would have to do if you were to use other engines.

 
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