flowable 实现投票功能

最近想做一个投票节点,具体需求是这样的

• 流程同意到一定比例时,往下走
• 如果流程不同意时,即返回指定的任何节点.
  注意:流程引擎是我用flowable进行改造的,有些是需要重写节点的行为,现在只说关键的地方,供大家参考.

1. 流程定义-投票的行为
   生成的流程定义如下:

      
        ${voteMultiInstanceService.completeTask(execution,'22','N6')}
      
    

其中voteMultiInstanceService是一个决策判断的bean类

2. 流程判断是否达到同意或不同意的标准

@Service("voteMultiInstanceService")
public class VoteMultiInstanceService implements Serializable {

    @Autowired
    private RuntimeService runtimeService;

    public boolean completeTask(DelegateExecution execution, String voteRate, String voteRefuseNode) {
        //所有人员审批
        int nrOfInstances = (Integer) execution.getVariable("nrOfInstances"); //总的会签任务数量
        int nrOfCompletedInstances = (Integer) execution.getVariable("nrOfCompletedInstances"); //总的会签任务数量---已执行
        int vote_pass_count = execution.getVariable("starmark_vote_pass_count") == null ? 0 : (Integer) execution.getVariable("starmark_vote_pass_count"); //总的会签任务数量---已执行的
        int voteRateInteger = Integer.parseInt(voteRate);

        if (((float) vote_pass_count / nrOfInstances * 100.0) >= voteRateInteger) {
            return true;
        }
        //不同意
        if ( ((float)(nrOfCompletedInstances - vote_pass_count) / nrOfInstances) * 100.0 > (100 - voteRateInteger)) {
            execution.setVariableLocal("starmark_voteRefuseNode",voteRefuseNode);
            return true;
        }
        return false;
    }
}

3. 流程不同意时,返回指定的节点
   按上所示,流程不同意时,流程设置了一个变量starmark_voteRefuseNode,如果该变量有值,就需要流转到指定的节点
   这个时候,需要重写ParallelMultiInstanceBehavior的cleanupMiRoot,具体重写如下:

  protected void cleanupMiRoot(DelegateExecution execution) {
        // Delete multi instance root and all child executions.
        // Create a fresh execution to continue

        ExecutionEntity multiInstanceRootExecution = (ExecutionEntity) getMultiInstanceRootExecution(execution);
        String voteRefuseNode=execution.getVariableLocal("starmark_voteRefuseNode")==null?"":execution.getVariableLocal("starmark_voteRefuseNode")+"";
        FlowElement flowElement = multiInstanceRootExecution.getCurrentFlowElement();
        ExecutionEntity parentExecution = multiInstanceRootExecution.getParent();

        ExecutionEntityManager executionEntityManager = CommandContextUtil.getExecutionEntityManager();
        Collection executionIdsNotToSendCancelledEventsFor = execution.isMultiInstanceRoot() ? null : Collections.singletonList(execution.getId());
        executionEntityManager.deleteChildExecutions(multiInstanceRootExecution, null, executionIdsNotToSendCancelledEventsFor, DELETE_REASON_END, true, flowElement);
        executionEntityManager.deleteRelatedDataForExecution(multiInstanceRootExecution, DELETE_REASON_END);
        executionEntityManager.delete(multiInstanceRootExecution);

        ExecutionEntity newExecution = executionEntityManager.createChildExecution(parentExecution);
        //投票节点
        if(StringUtils.isEmpty(voteRefuseNode)) {
            //正常流转
            newExecution.setCurrentFlowElement(flowElement);
            super.leave(newExecution);
        } else {
            //不同意时,返回指定节点
            org.flowable.bpmn.model.Process process = ProcessDefinitionUtil.getProcess(newExecution.getProcessDefinitionId());
            FlowElement targetFlowElement = process.getFlowElement(voteRefuseNode);
            newExecution.setCurrentFlowElement(targetFlowElement);
            FlowableEngineAgenda agenda = CommandContextUtil.getAgenda();
            agenda.planContinueProcessInCompensation(newExecution);
        }
    }

至此,投票功能已完成