将对象传递给 DROOLS

Question

我对 DROOLS 还很陌生。我正在使用 Activiti-Explorer，我需要 DROOLS 来做决策。我创建了 class 的实例对象并添加了从 API.

获取的数据

LoanApplicant loanApplicant = new LoanApplicant();
loanApplicant.setUserID(obj.getJSONObject("data").getJSONObject("ownership_details").getInt("user_id"));
loanApplicant.setApplicantName(obj.getJSONObject("data").getJSONObject("ownership_details").getString("name"));

同样，我在 class 对象中设置了更多字段，然后将其设置为 Java 将变量 arg0 委托给 Activiti 内存

arg0.setVariable("loanApplication", loanApplicant);

同样，由于进一步需要 DROOLS 决策输出，我创建了一个输出 java 文件来记录其决策。

输出java文件：RulesOutput.java：-

private String testValue = null;
public String getTestValue(){
    return this.getTestValue();
}
public void setTestValue(String testValue){
    this.testValue = testValue;
}

与 loanApplicant 类似，我已将此 class 设置到内存中：

arg0.setVariable("RulesOutput", new RulesOutput());

现在我将这些字段从 Process BPMN Diagram 传递到 Drools Task Work Step。

这是我的 DROOLS .drl 文件：

import com.LOS.*;
rule "FLS_1"
when
    $loanApplication : loanApplication(age >= 20 && age < 60)
    $rulesOutput : RulesOutput (isApproved == false || isApproved == true)
then
    rulesOutput.setAgeScore(100);

结束

现在问题：尽管我已将所有必需的对象传递给 DROOLS，但我得到 Unable to resolve ObjectType。错误日志：

06:39:47,288 [http-bio-8480-exec-15] INFO  org.activiti.engine.impl.bpmn.deployer.BpmnDeployer  - Processing resource RuleSet_1.drl
06:39:47,288 [http-bio-8480-exec-15] INFO  org.activiti.engine.impl.bpmn.deployer.BpmnDeployer  - Processing resource LOS_1.bpmn20.xml'
06:39:47,645 [http-bio-8480-exec-15] INFO  org.activiti.engine.impl.rules.RulesDeployer  - Processing resource RuleSet_1.drl
06:39:47,702 [http-bio-8480-exec-15] INFO  org.activiti.engine.impl.rules.RulesDeployer  - Processing resource LOS_1.bpmn20.xml
06:39:47,704 [http-bio-8480-exec-15] ERROR org.drools.compiler.builder.impl.KnowledgeBuilderImpl  - Unable to resolve ObjectType '$loanApplication' : [Rule name='FLS_1']
06:39:47,704 [http-bio-8480-exec-15] ERROR org.drools.compiler.builder.impl.KnowledgeBuilderImpl  - Unable to resolve ObjectType '$RulesOutput' : [Rule name='FLS_1']
06:39:47,704 [http-bio-8480-exec-15] ERROR org.drools.compiler.builder.impl.KnowledgeBuilderImpl  - Rule Compilation error : [Rule name='FLS_1']
[http-bio-8480-exec-15] INFO  org.activiti.engine.impl.bpmn.deployer.BpmnDeployer  - Processing resource RuleSet_1.drl
[http-bio-8480-exec-15] INFO  org.activiti.engine.impl.bpmn.deployer.BpmnDeployer  - Processing resource LOS_1.bpmn20.xml
[http-bio-8480-exec-15] INFO  org.activiti.engine.impl.rules.RulesDeployer  - Processing resource RuleSet_1.drl
[http-bio-8480-exec-15] INFO  org.activiti.engine.impl.rules.RulesDeployer  - Processing resource LOS_1.bpmn20.xml
[http-bio-8480-exec-15] ERROR org.drools.compiler.builder.impl.KnowledgeBuilderImpl  - Unable to resolve ObjectType '$loanApplication' : [Rule name='FLS_1']
[http-bio-8480-exec-15] ERROR org.drools.compiler.builder.impl.KnowledgeBuilderImpl  - Unable to resolve ObjectType '$RulesOutput' : [Rule name='FLS_1']
[http-bio-8480-exec-15] ERROR org.drools.compiler.builder.impl.KnowledgeBuilderImpl  - Rule Compilation error : [Rule name='FLS_1']
com/LOS/Rule_FLS_1842423443.java (7:323) : \RulesOutput cannot be resolved

我被困在这里差不多2天了。欢迎提出任何建议。

Answer 1

import com.LOS.*;

如果 loanApplication 和 RulesOutput 在包 com.LOS.approc.dao 中，您必须使用

import com.LOS.approc.dao.*;

尽管通常首选单独进口。（谈到风格：你应该坚持约定，并使用大写首字母 class 名称。

$loanApplication : loanApplication(age >= 20 && age < 60)

如果不需要引用这个对象，绑定($loanApplication:)可以省略。

    $rulesOutput : RulesOutput (isApproved == false || isApproved == true)
then
    rulesOutput.setAgeScore(100); ## missing dollar

如果您使用 $rulesOutput 作为绑定变量的名称，则必须坚持使用该名称。 $ 是变量 (Java) 名称的一部分，而不是宏扩展运算符，正如您在尝试 ${loanApplication} 和 ${Rules} 时所说的那样。

将对象传递给 DROOLS

Pass object to DROOLS

java

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