Activiti7工作流引擎：进阶篇 ProcessRuntime和TaskRuntime

Posted 2022-03-22 vbirdbest

医者仁心，以人为本 --- 致西安中被拒绝的生命。

一：ProcessRuntime和TaskRuntime

Activiti7提供了两个Runtime类用于对Service提供了进一步封装，并且和Spring Security进行高度耦合。

@PreAuthorize("hasRole('ACTIVITI_USER')")
public class ProcessRuntimeImpl implements ProcessRuntime 
	private final RuntimeService runtimeService;


public interface TaskRuntime 
  TaskRuntimeConfiguration configuration();
  Task task(String taskId);
  Page tasks(Pageable pageable);
  Page tasks(Pageable pageable, GetTasksPayload payload);
  Task create(CreateTaskPayload payload);
  Task claim(ClaimTaskPayload payload);
  Task release(ReleaseTaskPayload payload);
  Task complete(CompleteTaskPayload payload);
  Task update(UpdateTaskPayload payload);
  Task delete(DeleteTaskPayload payload);
  ...

@PreAuthorize("hasRole('ACTIVITI_USER')")
public class TaskRuntimeImpl implements TaskRuntime 
    private final TaskService taskService;



public interface ProcessRuntime 
  ProcessRuntimeConfiguration configuration();
  ProcessDefinition processDefinition(String processDefinitionId);
  Page processDefinitions(Pageable pageable);
  Page processDefinitions(Pageable pageable, GetProcessDefinitionsPayload payload);
  ProcessInstance start(StartProcessPayload payload);
  Page processInstances(Pageable pageable);
  Page processInstances(Pageable pageable, GetProcessInstancesPayload payload);
  ProcessInstance processInstance(String processInstanceId);
  ProcessInstance suspend(SuspendProcessPayload payload);
  ProcessInstance resume(ResumeProcessPayload payload);
  ProcessInstance delete(DeleteProcessPayload payload);
  void signal(SignalPayload payload);
  ...

XxxRuntime要求用户必须有ACTIVITI_USER角色。

https://github.com/Activiti/activiti-7-developers-guide/blob/master/getting-started/getting-started-activiti-core.md

二：示例

taskRuntime.create(TaskPayloadBuilder.create()
                .withName("First Team Task")
                .withDescription("This is something really important")
                .withGroup("activitiTeam")
                .withPriority(10)
           .build());

Page processDefinitionPage = processRuntime.processDefinitions(Pageable.of(0, 10));
logger.info("> Available Process definitions: " + processDefinitionPage.getTotalItems());
for (ProcessDefinition pd : processDefinitionPage.getContent()) 
  logger.info("\\t > Process definition: " + pd);

@SpringBootTest
class SpringbootActiviti7ApplicationTests 

	@Autowired
	private ProcessRuntime processRuntime;
	@Autowired
	private TaskRuntime taskRuntime;
	@Autowired
	private SecurityUtil securityUtil;


	@Test
	void testQueryProcessDefinition() 
		securityUtil.logInAs("system");

		Page<ProcessDefinition> processDefinitionPage = processRuntime.processDefinitions(Pageable.of(0, 10));
		for (ProcessDefinition processDefinition : processDefinitionPage.getContent()) 
			System.out.println(processDefinition.getKey());
		
	


	@Test
	void testStartProcess() 
		securityUtil.logInAs("system");
		processRuntime.start(ProcessPayloadBuilder.start().withProcessDefinitionKey("HelloWorldProcess").build());
	

	@Test
	public void testCompleteTask() 
		securityUtil.logInAs("jack");
		Page<Task> taskPage = taskRuntime.tasks(Pageable.of(0, 10));
		if (taskPage.getTotalItems() > 0) 
			for (Task task : taskPage.getContent()) 
				// 拾取任务
				taskRuntime.claim(TaskPayloadBuilder.claim().withTaskId(task.getId()).build());
				// 完成任务
				taskRuntime.complete(TaskPayloadBuilder.complete().withTaskId(task.getId()).build());
			
		
	

三：其它

Activiti7 提供了两个新的API ProcessRuntime和TaskRuntime，但是这两个API必须使用Spring Security，这对于项目没有引入Spring Security是非常不友好的。

so 我们可以使用Activiti7中继续使用原来的方式，使用XxxService来完成工作流。