2021-08-31初识flowable

public static void main( String[] args ) {
        //创建一个独立的配置对象，这里的独立是指这样一个事实，即引擎完全是由自己创建和使用的（而不是在spring环境中，而不是使用
        // springPrcessEngineConfiguration类）
        ProcessEngineConfiguration cfg = new StandaloneProcessEngineConfiguration()
                .setJdbcUrl("jdbc:h2:mem:flowable;DB_CLOSE_DELAY=-1")
                .setJdbcUsername("sa")
                .setJdbcPassword("")
                .setJdbcDriver("org.h2.Driver")
                .setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE);
        //由上述配置创建创建所述的流程引擎
        ProcessEngine processEngine = cfg.buildProcessEngine();

        RepositoryService repositoryService = processEngine.getRepositoryService();
        Deployment deploy = repositoryService.createDeployment()
                .addClasspathResource("holiday-request.bpmn20.xml")
                .deploy();

        ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery()
                .deploymentId(deploy.getId())
                .singleResult();

        System.out.println("Found process definition:" + processDefinition.getName());

        Scanner scanner = new Scanner(System.in);

        System.out.println("Who are you?");
        String employee = scanner.nextLine();

        System.out.println("How many holidays do you want to request?");
        String nrOfHolidays = scanner.nextLine();

        System.out.println("Why do you need them?");
        String description = scanner.nextLine();

        RuntimeService runtimeService = processEngine.getRuntimeService();

        Map<String, Object> variables = new HashMap<>(16);
        variables.put("employee",employee);
        variables.put("nrOfHolidays",nrOfHolidays);
        variables.put("description",description);
        ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("holidayRequest",variables);

        TaskService taskService = processEngine.getTaskService();
        List<Task> tasks = taskService.createTaskQuery().taskCandidateGroup("managers").list();
        System.out.println("You have " + tasks.size() + " tasks:");
        for(int i=0;i<tasks.size();i++){
            System.out.println((i+1)+")"+tasks.get(i).getName());
        }

        System.out.println("Which task would you like to complete?");
        Integer taskIndex = Integer.valueOf(scanner.nextLine());

        Task task = tasks.get(taskIndex - 1);
        Map<String, Object> processVariables = taskService.getVariables(task.getId());
        System.out.println(processVariables.get("employee") + " wants " +
                processVariables.get("nrOfHolidays") + "of holidays,Do you approve this?");

        boolean approved = scanner.nextLine().toLowerCase().equals("y");
        variables = new HashMap<>(16);
        variables.put("approved",approved);
        taskService.complete(task.getId(),variables);

        HistoryService historyService = processEngine.getHistoryService();
        List<HistoricActivityInstance> activities = historyService.createHistoricActivityInstanceQuery()
                .processInstanceId(processInstance.getId())
                .finished()
                .orderByHistoricActivityInstanceEndTime().asc()
                .list();
        for(HistoricActivityInstance activity:activities){
            System.out.println(activity.getActivityId() + " took "
                    + activity.getDurationInMillis() + " milliseconds");
        }
    }