要在Spring Boot中部署Drools规则引擎,你需要遵循以下步骤:
在你的pom.xml
文件中,添加以下依赖:
<!-- Spring Boot Starters -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<!-- Drools Dependencies -->
<dependency>
<groupId>org.drools</groupId>
<artifactId>drools-core</artifactId>
<version>7.56.0.Final</version>
</dependency>
<dependency>
<groupId>org.drools</groupId>
<artifactId>drools-compiler</artifactId>
<version>7.56.0.Final</version>
</dependency>
<dependency>
<groupId>org.drools</groupId>
<artifactId>drools-decisiontables</artifactId>
<version>7.56.0.Final</version>
</dependency>
<dependency>
<groupId>org.kie</groupId>
<artifactId>kie-api</artifactId>
<version>7.56.0.Final</version>
</dependency>
<dependency>
<groupId>org.kie</groupId>
<artifactId>kie-internal</artifactId>
<version>7.56.0.Final</version>
</dependency>
</dependencies>
创建一个配置类,用于初始化KieContainer
。这将允许你在应用程序中使用Drools规则引擎。
import org.kie.api.KieServices;
import org.kie.api.builder.KieBuilder;
import org.kie.api.builder.KieFileSystem;
import org.kie.api.builder.KieRepository;
import org.kie.api.runtime.KieContainer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class DroolsConfig {
@Bean
public KieContainer kieContainer() {
KieServices kieServices = KieServices.Factory.get();
KieRepository kieRepository = kieServices.getRepository();
KieFileSystem kieFileSystem = kieServices.newKieFileSystem();
// Load your DRL or DSL files here
// For example: kieFileSystem.write(ResourceFactory.newClassPathResource("rules/your-rule-file.drl"));
KieBuilder kieBuilder = kieServices.newKieBuilder(kieFileSystem);
kieBuilder.buildAll();
return kieServices.newKieContainer(kieRepository.getDefaultReleaseId());
}
}
在resources
目录下创建一个名为rules
的文件夹,并在其中创建你的DRL或DSL规则文件。例如,创建一个名为your-rule-file.drl
的文件,并添加以下内容:
package com.example.drools
rule "Hello World Rule"
when
// Your conditions here
then
System.out.println("Hello World from Drools!");
end
在DroolsConfig
类中,使用ResourceFactory
加载你的规则文件。例如:
import org.kie.internal.io.ResourceFactory;
// ...
kieFileSystem.write(ResourceFactory.newClassPathResource("rules/your-rule-file.drl"));
现在你可以在你的应用程序中使用KieContainer
来执行规则。例如,创建一个名为DroolsService
的服务类:
import org.kie.api.runtime.KieContainer;
import org.kie.api.runtime.KieSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class DroolsService {
@Autowired
private KieContainer kieContainer;
public void executeRules() {
KieSession kieSession = kieContainer.newKieSession();
// Insert your facts here
// For example: kieSession.insert(new YourFact());
kieSession.fireAllRules();
kieSession.dispose();
}
}
在你的控制器或其他需要执行规则的地方,注入DroolsService
并调用executeRules()
方法。
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class MyController {
@Autowired
private DroolsService droolsService;
@GetMapping("/execute-rules")
public String executeRules() {
droolsService.executeRules();
return "Rules executed successfully!";
}
}
现在,当你访问/execute-rules
端点时,Drools规则引擎将执行你的规则。