Flowable表结构认识

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// 配置数据库相关信息 获取 ProcessEngineConfiguration
ProcessEngineConfiguration cfg = new StandaloneProcessEngineConfiguration()
    .setJdbcUrl("jdbc:mysql://localhost:3306/flowable?serverTimezone=UTC&nullCatalogMeansCurrent=true")
    .setJdbcUsername("root")
    .setJdbcPassword("123456")
    .setJdbcDriver("com.mysql.cj.jdbc.Driver")
    .setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE);
// 获取流程引擎对象
ProcessEngine processEngine = cfg.buildProcessEngine();

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    @Test
    public void test01(){
        // 获取流程引擎对象
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        System.out.println("processEngine = " + processEngine);
    }

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    public static ProcessEngine getProcessEngine(String processEngineName) {
        if (!isInitialized()) {
            init(); // 完成初始化操作
        }
        return processEngines.get(processEngineName);
    }

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    public static synchronized void init() {
        if (!isInitialized()) {
            if (processEngines == null) {
                // Create new map to store process-engines if current map is null
                processEngines = new HashMap<>();
            }
            ClassLoader classLoader = ReflectUtil.getClassLoader();
            Enumeration<URL> resources = null;
            try {
                resources = classLoader.getResources("flowable.cfg.xml"); // 加载flowable.cfg.xml配置文件
            } catch (IOException e) {
                throw new FlowableIllegalArgumentException("problem retrieving flowable.cfg.xml resources on the classpath: " + System.getProperty("java.class.path"), e);
            }

            // Remove duplicated configuration URL's using set. Some
            // classloaders may return identical URL's twice, causing duplicate
            // startups
            Set<URL> configUrls = new HashSet<>();
            while (resources.hasMoreElements()) {
                configUrls.add(resources.nextElement());
            }
            for (Iterator<URL> iterator = configUrls.iterator(); iterator.hasNext();) {
                URL resource = iterator.next();
                LOGGER.info("Initializing process engine using configuration '{}'", resource.toString());
                initProcessEngineFromResource(resource); // 初始化ProcessEngine
            }

            try {
                resources = classLoader.getResources("flowable-context.xml"); // 在整合Spring的情况下加载该文件
            } catch (IOException e) {
                throw new FlowableIllegalArgumentException("problem retrieving flowable-context.xml resources on the classpath: " + System.getProperty("java.class.path"), e);
            }
            while (resources.hasMoreElements()) {
                URL resource = resources.nextElement();
                LOGGER.info("Initializing process engine using Spring configuration '{}'", resource.toString());
                initProcessEngineFromSpringResource(resource); // 从Spring的资源文件中完成ProcessEngine的初始化
            }

            setInitialized(true);
        } else {
            LOGGER.info("Process engines already initialized");
        }
    }

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    @Test
    public void test2() throws Exception{
        ProcessEngineConfiguration configuration = ProcessEngineConfiguration
                .createProcessEngineConfigurationFromResource("flowable.cfg.xml");
        ProcessEngine processEngine = configuration.buildProcessEngine();
        System.out.println("processEngine = " + processEngine);
    }

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RuntimeService runtimeService = processEngine.getRuntimeService();
RepositoryService repositoryService = processEngine.getRepositoryService();
TaskService taskService = processEngine.getTaskService();
// ...

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/**
     * 部署流程
     */
    @Test
    public void test3(){
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        RepositoryService repositoryService = processEngine.getRepositoryService();
        Deployment deploy = repositoryService.createDeployment()
                .addClasspathResource("holiday-request-new.bpmn20.xml")
                .name("请假流程...")
                .category("请假") // 分类
                .tenantId("dpb") // 租户id
                .deploy();
        System.out.println("deploy.getId() = " + deploy.getId());
        System.out.println("deploy.getName() = " + deploy.getName());
        System.out.println("deploy.getCategory() = " + deploy.getCategory());
    }

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/**
     * 挂起流程
     */
    @Test
    public void test05(){
        // 获取流程引擎对象
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        RepositoryService repositoryService = processEngine.getRepositoryService();
        ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery()
                .processDefinitionId("holiday:1:4")
                .singleResult();
        // 获取流程定义的状态
        boolean suspended = processDefinition.isSuspended();
        System.out.println("suspended = " + suspended);
        if(suspended){
            // 表示被挂起
            System.out.println("激活流程定义");
            repositoryService.activateProcessDefinitionById("holiday:1:4",true,null);
        }else{
            // 表示激活状态
            System.out.println("挂起流程");
            repositoryService.suspendProcessDefinitionById("holiday:1:4",true,null);
        }
    }

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/**
     * 启动流程实例
     */
    @Test
    public void testRunProcess(){
        // 获取流程引擎对象
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        // 启动流程实例通过 RuntimeService 对象
        RuntimeService runtimeService = processEngine.getRuntimeService();
        // 构建流程变量
        Map<String,Object> variables = new HashMap<>();
        variables.put("employee","张三") ;// 谁申请请假
        variables.put("nrOfHolidays",3); // 请几天假
        variables.put("description","工作累了，想出去玩玩"); // 请假的原因
        // 启动流程实例，第一个参数是流程定义的id
        ProcessInstance processInstance = runtimeService
                .startProcessInstanceById("holiday:1:4", variables);// 启动流程实例
        // 输出相关的流程实例信息
        System.out.println("流程定义的ID：" + processInstance.getProcessDefinitionId());
        System.out.println("流程实例的ID：" + processInstance.getId());
        System.out.println("当前活动的ID：" + processInstance.getActivityId());
    }

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// 获取流程引擎对象
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        TaskService taskService = processEngine.getTaskService();
        Task task = taskService.createTaskQuery()
                .processDefinitionId("holiday:1:4")
                .taskAssignee("zhangsan")
                .singleResult();
        // 添加流程变量
        Map<String,Object> variables = new HashMap<>();
        variables.put("approved",false); // 拒绝请假
        // 完成任务
        taskService.complete(task.getId(),variables);

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// 1.获取ProcessEngine对象
ProcessEngine engine = ProcessEngines.getDefaultProcessEngine();
// 2.获取RuntimeService
RuntimeService runtimeService = engine.getRuntimeService();
// 3.获取流程实例对象
ProcessInstance processInstance = runtimeService.createProcessInstanceQuery()
    .processInstanceId("25001")
    .singleResult();
// 4.获取相关的状态操作
boolean suspended = processInstance.isSuspended();
String id = processInstance.getId();
if(suspended){
    // 挂起--》激活
    runtimeService.activateProcessInstanceById(id);
    System.out.println("流程定义：" + id + "，已激活");
}else{
    // 激活--》挂起
    runtimeService.suspendProcessInstanceById(id);
    System.out.println("流程定义：" + id + "，已挂起");
}

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ProcessEngine processEngine = cfg.buildProcessEngine();
TaskService taskService = processEngine.getTaskService();
Task task = taskService.createTaskQuery()
    .processDefinitionId("holiday:1:4")
    .taskAssignee("lisi")
    .singleResult();
// 添加流程变量
Map<String,Object> variables = new HashMap<>();
variables.put("approved",false); // 拒绝请假
// 完成任务
taskService.complete(task.getId(),variables);