Activti跳过中间节点的helloworld实例程序

此实例是一个最简单的在运行时人为动态改变流程运转的实例，意在为任意流、驳回等功能抛砖引玉.

定义一个最简单的流程，它只有一个“开始事件”、一个“ServiceTask”、一个“结束事件”.

我们现在的要实现的是直接跳过ServiceTask。

ServiceTask的实现类只是简单的在控制台输出一条语句.

public class Log implements JavaDelegate {public void execute(DelegateExecution execution) throws Exception {System.err.println("如果我出现了，就说明我没被忽略");}}

控制流向的代码如下

System.out.println("直接跳过ServiceTask的流程开始..................");RepositoryService repositoryService = activitiRule.getRepositoryService();ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery().deploymentId("1").singleResult();ProcessDefinitionEntity processDefinitionEntity = (ProcessDefinitionEntity) ((RepositoryServiceImpl) repositoryService).getDeployedProcessDefinition(processDefinition.getId());List<ActivityImpl> activities = processDefinitionEntity.getActivities();ActivityImpl start = null;ActivityImpl task = null;ActivityImpl end = null;for (ActivityImpl activity : activities) {if (activity.getId().equals("startevent1")) {start = activity;}if (activity.getId().equals("usertask1")) {task = activity;}if (activity.getId().equals("endevent1")) {end = activity;}}//清除原先的路径List<PvmTransition> cacheTran = start.getOutgoingTransitions();start.getOutgoingTransitions().clear();//创建新路径TransitionImpl tran = start.createOutgoingTransition();tran.setDestination(end);RuntimeService runtimeService = activitiRule.getRuntimeService();runtimeService.startProcessInstanceById(processDefinitionEntity.getProcessDefinition().getId());//恢复原来路径start.getOutgoingTransitions().clear();for (PvmTransition transition : cacheTran) {start.createOutgoingTransition().setDestination((ActivityImpl) transition.getDestination());}

这样ServiceTask将被跳过不会自动执行

当注释掉

start.getOutgoingTransitions().clear();

serviceTask将被执行.

这种方法只会影响一个流程实例的流程定义的内存镜像，其他流程不会受到影响.