Hello, I use drools plugin (6.4.0.Final) in Eclipse Neon. I followed the wizard to create a drools project with some example files. After the step were done, Eclipse highlighted errors at the two rules in the Sample.drl file. Here is one of the errors: Multiple markers at this line • com.sample.DroolsTest.Message cannot be resolved to a type • org.drools.core.util.bitmask.AllSetBitMask cannot be resolved to a type • Only a type can be imported. Com.sample.DroolsTest.Message resolves to a package • org.kie.api.runtime.rule.FactHandle cannot be resolved to a type • KnowledgeHelper cannot be resolved to a type • Only a type can be imported. Org.drools.core.spi.KnowledgeHelper resolves to a package • Message.GOODBYE cannot be resolved to a type • org.kie.api.runtime.rule.RuleContext cannot be resolved to a type • java.lang.Exception cannot be resolved to a type When I ran DroolsTest.java, I got the following error: java.lang.RuntimeException: Error while creating KieBase[Message [id=1, level=ERROR, path=Sample.drl, line=15, column=0 text=Rule Compilation error Only a type can be imported. Com.sample.DroolsTest.Message resolves to a package Only a type can be imported. Org.drools.core.spi.KnowledgeHelper resolves to a package KnowledgeHelper cannot be resolved to a type org.kie.api.runtime.rule.FactHandle cannot be resolved to a type java.lang.Exception cannot be resolved to a type org.kie.api.runtime.rule.RuleContext cannot be resolved to a type], Message [id=2, level=ERROR, path=Sample.drl, line=5, column=0 text=Rule Compilation error Only a type can be imported. Com.sample.DroolsTest.Message resolves to a package Only a type can be imported. In our case we will create the Rule.drl file name as part of a rule package. The rule will be in the rules package name. Here is the simple Rule: package drools import com.sample.Message; rule 'Hello World' dialect 'mvel' when m: Message( status == Message.HELLO, message: message ) then modify ( m ) { message = 'Goodbye cruel world', status. Global is the variable used in Drool and is visible in all rules inside the DRL file. Explore Drools Sample Resumes! Download & Edit, Get Noticed by Top Employers! As an alternative to creating and managing DRL files within the Decision Central interface, you can create DRL files in external standalone projects using Red Hat Developer Studio, Java objects, or Maven archetypes. These standalone projects can then be integrated as knowledge JAR (kJAR) dependencies in existing Red Hat Decision Manager projects in Decision Central. The DRL files in your standalone project must contain at minimum the required package specification, import lists, and rule definitions. Any other DRL components, such as global variables and functions, are optional. All data objects related to a DRL rule must be included with your standalone DRL project or deployment. 5.1. Creating DRL files in Red Hat JBoss Developer Studio You can use Red Hat JBoss Developer Studio to create DRL files with rules and integrate the files with your Red Hat Decision Manager decision service. Mp4 player mac os x. This method of creating DRL rules is helpful if you already use Red Hat Developer Studio for your decision service and want to continue with the same work flow. If you do not already use this method, then the Decision Central interface of Red Hat Decision Manager is recommended for creating DRL files and other rule assets. • Group ID: com.sample • Artifact ID: my-project • Version: 1.0.0-SNAPSHOT • Click Finish to create the project. This configuration sets up a basic project structure, class path, and sample rules. The following is an overview of the project structure: my-project `-- src/main/java| `-- com.sample| `-- DecisionTable.java| `-- DroolsTest.java| `-- ProcessTest.java| `-- src/main/resources| `-- dtables| `-- Sample.xls| `-- process| `-- sample.bpmn| `-- rules| `-- Sample.drl| `-- META-INF| `-- JRE System Library| `-- Maven Dependencies| `-- Drools Library| `-- src| `-- target| `-- pom.xml Notice the following elements. If Java Application is not an option when you right-click your project and select Run As, then go to Run As → Run Configurations, right-click Java Application, and click New. Then in the Main tab, browse for and select your Project and the associated Main class. Click Apply and then click Run to test the project. The next time you right-click your project folder, the Java Application option will appear. To integrate the new rule assets with an existing project in Red Hat Decision Manager, you can compile the new project as a knowledge JAR (kJAR) and add it as a dependency in the pom.xml file of the project in Decision Central. 5.3. Creating DRL files using Maven You can use Maven archetypes to create DRL files with rules and integrate the archetypes with your Red Hat Decision Manager decision service.
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