工作偶尔会遇到需要审批相关的系统,对于流程步骤相对固定的,一般会采取某些第三方的工作流来做对应的系统。目前唯一用过的就是activiti工作流。对它进行了简单的研究学习。参考以前入门的文章,发现它大概会生成二十多表,但是很多表基本没有使用。由于对于其源码没有进入深层次的研究,所以一旦遇到流程错乱就容易找不到问题。基于此,尝试写一个简单的关于自定义流程的设计,多一个备选方案。
image.png
从这张图我抽出了四个对象:事件、节点、网关、流程线。 为什么这么抽取对象??? 看前言寻找答案,找不到那就是因为经验!!! 为什么一根线走组长审批了还走经理,另外一根线直接走经理??? 需求如此。。。。
image.png
package com.example.customprocessengine.model;
import lombok.Getter;
import lombok.Setter;
import javax.persistence.Entity;
import javax.persistence.Id;
@Entity
@Getter
@Setter
public class Event {
@Id
private Long id;
private String eventId;
private String eventName;
}
package com.example.customprocessengine.model;
import lombok.Getter;
import lombok.Setter;
import javax.persistence.Entity;
import javax.persistence.Id;
@Entity
@Getter
@Setter
public class ExclusiveGateway {
@Id
private Long id;
private String gatewayId;
private String name;
}
package com.example.customprocessengine.model;
import lombok.Getter;
import lombok.Setter;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.OneToOne;
@Entity
@Getter
@Setter
public class UserTask {
@Id
private Long id;
private String taskId;
// private String taskname;
/*@ElementCollection
private List<String> username;*/
@OneToOne
private Parameter parameter;
@OneToOne
PassCondition passCondition;
}
package com.example.customprocessengine.model;
import lombok.Getter;
import lombok.Setter;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.OneToOne;
@Getter
@Setter
@Entity
public class SequenceFlow {
@Id
private Long id;
private String sourceRef;
private String targetRef;
private String conditionExpression;
@OneToOne
private Parameter parameter;
}
package com.example.customprocessengine.model;
import lombok.Getter;
import lombok.Setter;
import javax.persistence.*;
import java.time.LocalDateTime;
import java.util.List;
@Entity
@Getter
@Setter
public class Tasking {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private LocalDateTime operateTime;
private String username;
/*@OneToOne
private UserTask userTask;*/
@OneToOne
private SequenceFlow sequenceFlow;
@OneToOne
private ProcessInstance processInstance;
@ElementCollection(fetch = FetchType.EAGER)
List<String> usernames;
}
package com.example.customprocessengine.model;
import lombok.Getter;
import lombok.Setter;
import javax.persistence.*;
import java.time.LocalDateTime;
@Entity
@Getter
@Setter
public class TaskHistory {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private LocalDateTime operateTime;
private String username;
/*@OneToOne
private UserTask userTask;*/
@OneToOne
private SequenceFlow sequenceFlow;
@OneToOne
private ProcessInstance processInstance;
@OneToOne
private UserTask userTask;
}
代码一贴字数瞬间翻两番
tips:所谓工作流,简单点就是把规则定好,存在某个地方(可以是txt文件,xml文件,或者数据库)
event表
对应标红
task表
对应标红
gateway表
对应标红
SequenceFlow表.png
对应标红
结论-----》表设计基本能放下所有。
package com.example.customprocessengine.service;
import java.util.Map;
public interface Customprocessengine {
Long startProcess(String processKey, Map<String, Object> variavle);
void completeTask(Long ProcessInstanceId,Map<String, Object> variavle);
}
目前提供两个方法:
1.开启流程
2.完成任务
后续接口还未完成。
@Test
@Transactional
@Rollback(value = false)
public void test2() {
Map<String,Object> params = new HashMap<>();
List<String> zzspr = new ArrayList<>();
zzspr.add("ysh员工");
params.put("fqr",zzspr);
System.out.println(customprocessengine.startProcess("1",params));
}
// 257 260 263
@Test
@Transactional
@Rollback(value = false)
public void tets(){
Map<String,Object> params = new HashMap<>();
List<String> zzspr = new ArrayList<>();
zzspr.add("ysh组长1");
zzspr.add("ysh组长2");
params.put("zzspr",zzspr);
params.put("days", 3);
// params.put("jlspr", "ysh");
customprocessengine.completeTask(279l,params);
}
@Test
@Transactional
@Rollback(value = false)
public void tets3(){
Map<String,Object> params = new HashMap<>();
List<String> zzspr = new ArrayList<>();
zzspr.add("ysh经理");
params.put("jlspr",zzspr);
params.put("dealpeople", "ysh组长1");
// params.put("days", 3);
// params.put("jlspr", "ysh");
// params.put("dealMan")
customprocessengine.completeTask(279l,params);
}
@Test
@Transactional
@Rollback(value = false)
public void tets41(){
Map<String,Object> params = new HashMap<>();
List<String> zzspr = new ArrayList<>();
zzspr.add("ysh经理");
params.put("jlspr",zzspr);
params.put("dealpeople", "ysh组长2");
// params.put("days", 3);
// params.put("jlspr", "ysh");
// params.put("dealMan")
customprocessengine.completeTask(279l,params);
}
@Test
@Transactional
@Rollback(value = false)
public void tets4(){
Map<String,Object> params = new HashMap<>();
// List<String> zzspr = new ArrayList<>();
// zzspr.add("yshjl");
// params.put("jlspr",zzspr);
// params.put("days", 3);
// params.put("jlspr", "ysh");
customprocessengine.completeTask(279l,params);
}
历史任务表
进行中的任务表
进行中的任务表
历史任务表
进行中的任务表
历史任务表
进行中的任务表
历史任务表
进行中的任务表
历史任务表
字符串转执行代码
package com.example.customprocessengine.util;
import org.apache.commons.jexl3.JexlContext;
import org.apache.commons.jexl3.JexlEngine;
import org.apache.commons.jexl3.JexlExpression;
import org.apache.commons.jexl3.MapContext;
import org.apache.commons.jexl3.internal.Engine;
import java.util.Map;
public class ReflectUtils {
private static JexlEngine jexlEngine = new Engine();
public static boolean executeExpression(String jexlExpression, Map<String, Object> map) {
JexlExpression expression = jexlEngine.createExpression(jexlExpression);
JexlContext context = new MapContext();
if (null != map && map.size() > 0) {
map.forEach(context::set);
}
return (boolean) expression.evaluate(context);
}
}
作为自定义流程引擎初版,后续会继续完善,基本功能完成后将上传github。喜欢的朋友可以持续关注,评论区留下邮箱可私发未完成的代码。