jackrabb1t / drools-usage-patterns

rhc

Drools Usage Patterns

There are 3 ways to use the Drools platform, this project showcases the differences:

1. Embedded/Generate

• Inspect the drools-usage-patterns-embedded project to see how to use rules that are on your classpath EmbeddedKieBaseProvider.java : Any Rules in the classPath are added. i.e. src/main/resources/name.drl

  	KIE_CONTAINER = KieServices.Factory.get().newKieClasspathContainer();

• dependency: drools-usage-patterns-model

2. Scanner

• Inspect the drools-usage-patterns-fetch project to see how to use rules that are fetched with maven, potentially changing without updating your code!
• KieBaseProvider.java

   //The releaseId uses maven groupId, artifactId, and version to specify a kjar (set of rules)
     String groupId = "com.rhc.drools.example";
 String artifactId = "drools-usage-patterns-kjar";
 String version = "1.0.0-SNAPSHOT";
 ReleaseId releaseId = KIE_SERVICES.newReleaseId(groupId, artifactId, version);

• dependency: drools-usage-patterns-model

3. Remote

• Inspect the drools-usage-patterns-remote project to see how to create a client for the realtime execution server, introduced in the latest version of Drools.
• RemoteCommandExecutor.java

       //Creating a client to the KieServer requires a url, and username/password for a use with the 'kie-server' role.
      String url = "http://localhost:8080/kie-server/services/rest/server";
      String username = "kieserver";
      String password = "Pass@123";

4. drools-usage-patterns-kjar

• kjar with a single rule.
• dependency: drools-usage-patterns-model

5. drools-usage-patterns-model

• jar with the person object on which the rule is applied.