Businesses all over the globe go through dynamic changes in line with the market economics. Industries such as insurance and banking are most susceptible to the random market changes and hence are required to come up with plans to tackle such kind of exigencies. As solutions for anomalies like this, we have business rule engines that generate tools that enable developers and business analysts to build decision logic revolving around an organization’s data. A business rule is in fact a statement that constrains or defines some attributes of the business. These rules are leveraged to influence or control the behavior of the business. Basically the function of the rule engines is to evaluate as well as execute the rules along with if-then statements. This facilitates the severance of knowledge from its execution logic and modifications can be done without altering source code.

These Java rule engines, built with the help of the JCP or Java Community Process program execute business rules within a runtime production ambience. The engines help in cutting down an application’s extensibility as well as maintenance costs, mitigating the intricacy of components that implement complicated business logic. All Java web application developers should be aware of these.

• 1) Jess Rule Engine for java: This is the fastest of the scripting environment and rule engines built in Java. Jess enables the developers to develop Java software through prompt and clear-cut manipulation and reasoning of Java objects.

• 2) JBoss Drools: This rule engine is well acclaimed for its natural clarity of business rules considered in respect to business objects. It paves room for various declarative keywords and authoring approaches. It is an open source engine which offers excellent execution and it incorporates a Business Rules Management System which provides effective assistance in enterprise class management.

• 3) Termware: Use of Termware in software system analysis ensures cost effectiveness of software maintenance across a range of specified operations and requirements. A Java debug interface is available within this business rule engine. The primary applications include diverse formal models transformation and analysis, computer algebra systems, problem-specific languages development and software engineering.

• 4) Hammurapi rules: This helps in effective simplification of complicated problems into smaller segments without utilizing specific rules language. It implies that the developers are not required to learn the specific rules language. The most significant aspect is that the same sets of rules can be applied based on the problem.

• 5) Open Rules: This particular business rule engine helps to render rules oriented system less costly and convenient to develop. It helps the corporations to keep pace with the ever increasing demand for high transaction volumes and complicated rule bases with convenient and affordable solutions.

• 6) Fair Isaac’s Blaze Advisor: This is effectively utilized by Sun Microsystems. Blaze Advisor 6.5 comes with exclusive features to aid the businesses in validation and verification in a better manner for entirety and uniformity of rules functional across rules lifecycle. Its abilities incorporate procedural logic and rules verification.

• 7) SweetRules: It is a synchronized assemblage of tools for ontologies and semantic web rules. SweetRules revolves around Rule Markup or Modeling Language (RuleML) which is the popular standard in case of semantic web rules. Moreover, SweetRules also provides support to Semantic Web Rule Language (SWRL) as well as the OWL standard applicable to semantic web ontologies. This potent rule engine lends support to RuleML’s Logic Programs extension that incorporates prioritization of conflict handling as well as routine attachments for tests and actions.

• 8) JRuleEngine: This rule engine is also open source and it is possible to load it through an XML file or through JRuleEngine APIs. Storage can be done externally within a database. Its distribution incorporates source files, jar file library, javadoc, readme.txt installation guidelines and more.

• 9) JxBRE: Light weight rule engines are in great demand. They help in managing the process flow related to an application within an external entity. XML is used to manage the application.

• 10) JEOPS: This is fundamentally a type of forward chaining rule engine. It boosts the business process through rules in Client applications, Java Application Servers, and Servlets.

A careful use of these Java Engines enables businesses to streamline their processes and achieve greater efficiency while at the same time reducing the costs.

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