如何将loanApplication对象从规则返回到bpm流程？

Question

我正在使用drools（kie-wb web接口），我有一个bpm流程，它接受一个loanApplication，并返回带有更新数据的loanApplication（这是目标）。但当我试着这么做的时候，我得到了回报。

"Unable to create response: [LoanApplicationReviewer.LoanApplicationReview:21 - Age Knockout:1] -- [LoanApplicationReviewer.LoanApplicationReview:21 - Age Knockout:1] -- null"

public class LoanApplication implements java.io.Serializable {

    static final long serialVersionUID = 1L;

    private java.lang.Integer id;
    private java.lang.Integer age;
    private boolean accepted = true;
    private java.util.List<java.lang.String> knockoutReasons = new java.util.ArrayList<java.lang.String>();


    public LoanApplication() {
    }

    public java.lang.Integer getId() {
        return this.id;
    }

    public void setId(java.lang.Integer id) {
        this.id = id;
    }

    public java.lang.Integer getAge() {
        return this.age;
    }

    public void setAge(java.lang.Integer age) {
        this.age = age;
    }

    public boolean isAccepted() {
        return this.accepted;
    }

    public void setAccepted(boolean accepted) {
        this.accepted = accepted;
    }

    public java.util.List<java.lang.String> getKnockoutReasons() {
        return this.knockoutReasons;
    }

    public void setKnockoutReasons(
            java.util.List<java.lang.String> knockoutReasons) {
        this.knockoutReasons = knockoutReasons;
    }

    public void addKnockoutReason(String knockoutReason) {
        if (this.knockoutReasons == null) {
            this.knockoutReasons = new java.util.ArrayList<java.lang.String>();
        }
        this.knockoutReasons.add(knockoutReason);
    }



    public String toString() {
        return "loanApplicationResponse::[accepted=" + this.accepted 
        + ",knockoutReasons="
        + this.knockoutReasons.toString() + "]";
    }

    public LoanApplication(java.lang.Integer id, java.lang.Integer age,
                           boolean accepted, java.util.List 
                           knockoutReasons) {
        this.id = id;
        this.age = age;
        this.accepted = accepted;
        this.knockoutReasons = knockoutReasons;
    }
}

package com.xyz.loanapplicationreviewer;

import com.xyz.loanapplicationreviewer.LoanApplication;
import org.kie.api.runtime.process.WorkflowProcessInstance;

rule 'age less than 30 do not accept'
ruleflow-group 'ageKnockoutGroup'
  dialect "mvel"
  when
    $process : WorkflowProcessInstance();
    $loanApp : LoanApplication() from (LoanApplication)$process.getVariable("loanApplication");
    eval ($loanApp.getAge() < 30);
  then
    $loanApp.setAccepted(false);
    $loanApp.addKnockoutReason("age under 30");
    ((WorkflowProcessInstance)kcontext.getKnowledgeRuntime().getProcessInstance($process.getId())).setVariable("loanApplication", $loanApp);
    System.out.println("Age less than 30 knockout");
end

我在business rule步骤中添加了一个条目脚本来填充流程实例，如下所示：

kcontext.getKnowledgeRuntime().insert(kcontext.getProcessInstance()); 

我还填写了我期望的数据分配。它似乎获得了数据，因为当我创建一个新实例并从表单运行它时，它拥有数据并执行规则，仅从使用swagger的rest接口中，我就得到了上面的错误。

Answer 1

在看了很多很多之后；

我似乎不得不稍微修改我的请求，以变成：

{
  "loanApplication" : {
    "com.xyz.abc.LoanApplication" : {
      "id" : 1,
      "age": 1,
      "accepted" : true
    }
  }
}

此外，我不得不将规则改为：

rule 'age less than 30 do not accept'
  ruleflow-group 'ageKnockoutGroup'
  dialect "mvel"
  when
    loanApplication : LoanApplication(age < 30);
    //process : WorkflowProcessInstance();
    //loanApp : LoanApplication() from (LoanApplication)process.getVariable("loanApplication");
    //eval (loanApp.getAge() < 30);
  then
    loanApplication.setAccepted(false);
    loanApplication.addKnockoutReason("age under 30");
    System.out.println("in then less than 30 with loanApp:" + loanApplication.toString());
    String knockoutReasonFact = "age under 30";
    boolean acceptedFact = false;
    insert(knockoutReasonFact);
    insert(acceptedFact);
    update(loanApplication);
end

使用所有相同的endpoint，我最终得到了我所期望的响应。我最终跟踪了business central是如何调用Drools/jBPM流程的，并对其进行了镜像。