Drools
Template:Short description Script error: No such module "For".
Page Module:Message box/ambox.css has no content.Page Template:Multiple issues/styles.css has no content.
This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these messages)
Template:AdvertPage Module:Message box/ambox.css has no content.
|
Page Module:Infobox/styles.css has no content.
| Drools | |
|---|---|
| [[Programmer|Original authorTemplate:Pluralize from text]] | Bob McWhirte, Mark Proctor |
| [[Programmer|DeveloperTemplate:Pluralize from text]] | The Apache Software Foundation |
| Initial release | August 1, 2005 |
| Written in | Java |
| Operating system | Cross-platform |
| Platform | Java |
| Type | Rules engine, Decision management |
| License | Apache-2.0 |
| Website | kie |
| Repository | github |
Script error: No such module "Check for conflicting parameters".
Drools is a business rule management system (BRMS) with a forward and backward chaining inference-based rules engine, more correctly known as a production rule system, using an enhanced implementation of the Rete algorithm.
Drools supports the Java Rules Engine API (Java Specification Request 94) standard for its business rule engine and enterprise framework for the construction, maintenance, and enforcement of business policies in an organization, application, or service.
Drools in Apache Kie
Drools, as part of the Kie Community[2] has entered Apache Incubator in January, 2023.[3]
Red Hat Decision Manager
Red Hat Decision Manager (formerly Red Hat JBoss BRMS[4]) is a business rule management system and reasoning engine for business policy and rules development, access, and change management.[5] JBoss Enterprise BRMS is a productized version of Drools with enterprise-level support available. JBoss Rules is also a productized version of Drools, but JBoss Enterprise BRMS is the flagship product.[6]
Components of the enterprise version:[7]
- JBoss Enterprise Web Platform – the software infrastructure, supported to run the BRMS components only
- JBoss Enterprise Application Platform or JBoss Enterprise SOA Platform – the software infrastructure, supported to run the BRMS components only
- Business Rules Engine – Drools Expert using the Rete algorithm and the Drools Rule Language (DRL)[8]
- Business Rules Manager – Drools Guvnor - Guvnor is a centralized repository for Drools Knowledge Bases, with rich web-based GUIs, editors, and tools to aid in the management of large numbers of rules.[9]
- Business Rules Repository – Drools Guvnor
Drools and Guvnor are JBoss Community open source projects. As they are mature, they are brought into the enterprise-ready product JBoss Enterprise BRMS.
Components of the JBoss Community version:[10]
- Drools Guvnor (Business Rules Manager) – a centralized repository for Drools Knowledge Bases
- Drools Expert (rule engine) – uses the rules to perform reasoning
- Drools Flow (process/workflow), or jBPM 5 – provides for workflow and business processes
- Drools Fusion (event processing/temporal reasoning) – provides for complex event processing
- Drools Planner/OptaPlanner (automated planning) – optimizes automated planning, including NP-hard planning problems
Example
This example[11] illustrates a simple rule to print out information about a holiday in July. It checks a condition on an instance of the Holiday class, and executes Java code if that condition is true.
rule "validate holiday"
when
$h1 : Holiday( month == "july" )
then
System.out.println($h1.name + ":" + $h1.month);
end
The purpose of dialect "mvel" is to point the getter and setters of the variables of your Plain Old Java Object (POJO) classes.
Consider the above example, in which a Holiday class is used and inside the circular brackets (parentheses) "month" is used. So with the help of dialect "mvel" the getter and setters of the variable "month" can be accessed.
Dialect "java" is used to help us write our Java code in our rules. There is one restriction or characteristic on this. We cannot use Java code inside the "when" part of the rule but we can use Java code in the "then" part.
We can also declare a Reference variable $h1 without the $ symbol. There is no restriction on this. The main purpose of putting the $ symbol before the variable is to mark the difference between variables of POJO classes and Rules.
See also
Lua error in mw.title.lua at line 404: bad argument #2 to 'title.new' (unrecognized namespace name 'Portal').
References
Page Template:Reflist/styles.css has no content.
- ^ Page Module:Citation/CS1/styles.css has no content."Drools - Releases". Retrieved 2025-04-11.
- ^ Page Module:Citation/CS1/styles.css has no content."KIE Community". Archived from the original on 2024-01-17.
- ^ Page Module:Citation/CS1/styles.css has no content."KIE Status". Archived from the original on 2023-12-25.
- ^ Page Module:Citation/CS1/styles.css has no content."JBoss Enterprise BRMS". Red Hat.
- ^ Page Module:Citation/CS1/styles.css has no content."JBoss Enterprise BRMS". Red Hat.
- ^ Page Module:Citation/CS1/styles.css has no content."JBoss Enterprise BRMS: Answers to frequently asked questions" (PDF). JBoss Community.
- ^ Page Module:Citation/CS1/styles.css has no content."JBoss Enterprise BRMS Platform 5.1". Red Hat. Archived from the original on 2011-03-18.
- ^ Page Module:Citation/CS1/styles.css has no content."JBoss Enterprise BRMS datasheet" (PDF). Red Hat. p. 4.
- ^ Page Module:Citation/CS1/styles.css has no content."Drools - Business Rules Management System (Java™, Open Source)".
- ^ Page Module:Citation/CS1/styles.css has no content."Drools 5 - The Business Logic integration Platform". JBoss Community.
- ^ http://downloads.jboss.com/drools/docs/5.1.1.34858.FINAL/drools-expert/html_single/index.html#d0e2676[permanent dead link]
External links
- No URL found. Please specify a URL here or add one to Wikidata.
- incubator-kie-drools on GitHub
Lua error in package.lua at line 80: module 'Module:Navbox/configuration' not found.
