Drools is an open source rule and decision management platform. It started as an inference engine and expanded to include additional functionality and components. The key components are Drools Expert (rule engine), Drools Flow (business process management), Drools Fusion (complex event processing), and Drools Guvnor (rules repository). Drools aims to allow business users to declaratively define business logic through rules and provide a knowledge-driven development approach.

1. Jboss Drools
Jboss Drools Introduction Training
By ITgma

2. Drools Overview
 It was born as an Inference Engine
 More functionality was added on top of it
 A Platform was created to create applications
 The declarative approach provided helps us to
share the knowledge with non technical roles
 A Knowledge Driven Development Approach
was proposed to build applications on top of
the platform
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3. DROOLS PROJECT
START
Open Source
Apache Licensed
Free to use
Innovative approach
Community support
NOW
Drools Expert
(Rule Engine)
Drools Flow == jBPM5
Drools Fusion
Drools Guvnor
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4. Open Source Decision Management
 Companies realize that smart, simple, agile
processing require operational decisions should
be managed, automated and improved
 The high volume transactional decisions must
be made to keep data flowing intelligently
 This must also change in response to external
variability, demonstrate compliance, manage
risks and be personalized
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5. Business rules allow business users
to participate in writing business logic
 Coding decisions in any language make it hard
to show those decisions
 Decision management replaces traditional
procedural code with business rules –
declarative, atomic, manageable fragments of
business logic
 Attack the decision separately and manage
those decisions explicitly
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6. Components(projects)
 Drools Expert(Rule Engine)
 Drools Flow == jBPM5
 Drools Fusion
 Drools Guvnor
Copyright © ITgma 2012

7. Copyright © ITgma 2012

8. Drools Architectural goals
Drools was designed and conceived for:
 Express business knowledge declaratively
 Integrate different solutions/applications using
a declarative approach
 To provide an unified and knowledge driven
development approach
 To provide a link of communication between
business people and technical people
 To be non-intrusive
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9. Alternative Architectures
Drools Alternative Architectures
 Embedded
 As a Service
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10. Drools Embedded Architecture,
centralized Knowledge
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11. Drools As A Service (Centralized)
Architecture
Copyright © ITgma 2012