Examples of org.activiti.engine.TaskService.claim()

org.activiti.engine.TaskService.claim()
Claim responsibility for a task: the given user is made assignee for the task. The difference with {@link #setAssignee(String,String)} is that here a check is done if the task already has a user assigned to it. No check is done whether the user is known by the identity component. @param taskId task to claim, cannot be null. @param userId user that claims the task. When userId is null the task is unclaimed,assigned to no one. @throws ActivitiObjectNotFoundException when the task doesn't exist. @throws ActivitiTaskAlreadyClaimedException when the task is already claimed by another user.

    assertEquals(taskService.createTaskQuery().taskCandidateUser("user1").count(), 1);
    assertEquals(taskService.createTaskQuery().taskCandidateUser("user2").count(), 1);
    assertEquals(taskService.createTaskQuery().taskCandidateUser("user3").count(), 1);


    Task task = taskService.createTaskQuery().singleResult();
    taskService.claim(task.getId(), "user1");


    assertEquals(taskService.createTaskQuery().taskCandidateUser("user1").count(), 0);
    assertEquals(taskService.createTaskQuery().taskCandidateUser("user2").count(), 0);
    assertEquals(taskService.createTaskQuery().taskCandidateUser("user3").count(), 0);

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              }


              // 如果这条任务已经办理过由系统自动签收分配给上一次办理的人
              if (historySameKeyTask != null && StringUtils.isNotBlank(historySameKeyTask.getAssignee())) {
                String lastAssignee = historySameKeyTask.getAssignee();
                taskService.claim(task.getId(), lastAssignee);
              }
              
            }
          }
        }

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  public static void claim(String processInstanceId) {
    TaskService taskService= SpringContextHolder.getBean(TaskService.class);
    //如果没有签收，签收
    Task task = taskService.createTaskQuery().processInstanceId(processInstanceId).singleResult();
    if(task != null && StringUtils.isEmpty(task.getAssignee())){
      taskService.claim(task.getId(), ObjectUtils.toString(UserUtils.getUser().getId()));
    }
  }
  
  
}

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