定义注解
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface FlowStart {
/**
* 流程类型
*/
String flowType();
/**
* uuid
*/
String uuid();
/**
* 是否删除原来流程
*/
boolean deleteOld() default false;
}
定义切面
/**
* 流程启动切面
* @author GuoYong
* @since 2023/9/6
*/
@Aspect
@Component
public class FlowStartAspect {
private final ProcessInstanceClient processInstanceClient;
public FlowStartAspect(ProcessInstanceClient processInstanceClient) {
this.processInstanceClient = processInstanceClient;
}
/**
* 定义切面
*/
@Pointcut("execution(@com.config.FlowStart * *(..))")
private void startAspect() {
}
@Around("startAspect()")
public Object around(ProceedingJoinPoint joinPoint) throws Throwable {
Object[] args = joinPoint.getArgs();
Object proceeded = joinPoint.proceed(args);
// 获取注解
FlowStart flowStart = getAnnotationLog(joinPoint);
// 获取注解的值
String flowType = flowStart.flowType();
String uuidEl = flowStart.uuid();
boolean deleteOld = flowStart.deleteOld();
// 解析el表达式
ExpressionParser parser = new SpelExpressionParser();
LocalVariableTableParameterNameDiscoverer discoverer = new LocalVariableTableParameterNameDiscoverer();
Method targetMethod = getTargetMethod(joinPoint);
String[] params = discoverer.getParameterNames(targetMethod);
EvaluationContext context = new StandardEvaluationContext();
for (int len = 0; len < params.length; len++) {
context.setVariable(params[len], args[len]);
}
Expression expression = parser.parseExpression(uuidEl);
String uuids = expression.getValue(context, String.class);
String [] uuidArray = uuids.split(",");
for (String uuid : uuidArray) {
if (deleteOld) {
processInstanceClient.deleteByBusinessKey(uuid);
}
Result result = processInstanceClient.init(InitProcessDto.builder()
.businessKey(uuid)
.processKey(flowType)
.build());
if (!result.isOk()) {
throw new RuntimeException("流程启动失败");
}
}
return proceeded;
}
private Method getTargetMethod(JoinPoint joinPoint) {
Signature signature = joinPoint.getSignature();
MethodSignature methodSignature = (MethodSignature) signature;
Method method = methodSignature.getMethod();
return method;
}
/**
* 是否存在注解，如果存在就获取
*/
private FlowStart getAnnotationLog(JoinPoint joinPoint) {
Method method = getTargetMethod(joinPoint);
if (method != null) {
return method.getAnnotation(FlowStart.class);
}
return null;
}
}
使用
@FlowStart(flowType = ProcessKeyConstants.DUTY_SCHEDULING_FLOW, uuid = "#editDutySchedulingDto.businessKey", deleteOld = true)
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文章来源：https://www.toymoban.com/news/detail-698470.html
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