JBPM 工作流 一些接口及方法

接口
ProcessEngine           工作流引擎   可以通過spring和 Configuration.getProcessEngine();
ExecutionService        執行
ProcessInstance         流程實例
ProcessDefinition       流程定義
TaskService         任務
IdentityService         自動增長
HistoryService          歷史記錄
ManagementService       管理
RepositoryService       倉庫



方法:
1.ProcessEngine
    processEngine.setAuthenticatedUserId(String );
    processEngine.setHibernateSession(Object);
    processEngine.setJdbcConnection(Connection);

    Object get(String);
    ExecutionService getExecutionService();
    HistoryService  getHistoryService();
    IdentityService getIdentityService();
    ManagementService getManagementService();
    RepositoryService getRepositoryService();
    TaskService getTaskService();



1.查詢流程實例:new Instance
List<ProcessInstance>  instances = executionService.createProcessInstanceQuery().list();

2.查詢流程進度
    1)得到當前流程中相匹配的活動 (可以得到活動的長高寬..)
    <%String id = request.getParameter("id");
    ProcessEngine processEngine = Configuration.getProcessEngine();
    RepositoryService repositoryService = processEngine.getRepositoryService();
    ExecutionService executionService = processEngine.getExecutionService();
    ProcessInstance processInstance = executionService.findProcessInstanceById(id);
    Set<String> activityNames = processInstance.findActiveActivityNames();
    ActivityCoordinates ac = repositoryService.getActivityCoordinates(processInstance.getProcessDefinitionId(),activityNames.iterator().next());%>
    <div style="position:absolute;border:1px solid red;left:<%=ac.getX()%>px;top:<%=ac.getY()%>px;width:<%=ac.getWidth()%>px;height:<%=ac.getHeight()%>px;"></div>

    2)生成圖片
    <img src="Definition_definitionImage.action?id=<%=id %>" style="position:absolute;left:0px;top:0px;" align="middle">

        RepositoryService repositoryService = this.getProcessEngine().getRepositoryService();
        ExecutionService executionService = this.getProcessEngine().getExecutionService();
        String id = this.getRequest().getParameter("id");
        ProcessInstance processInstance = executionService.findProcessInstanceById(id);
        String processDefinitionId = processInstance .getProcessDefinitionId();
         // processDefinitionId 方法表示去 JBPM4_DEPLOYPROP 中按 processDefinitionId和 STRINGVAL_ 字段去找 DEPLOYMENT
         // 簡單說就是通過 流程部署的小項id 去找 流程對象
        ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery()
            .processDefinitionId(processDefinitionId).uniqueResult();
        System.out.println(processDefinition.getImageResourceName()+"-----"+processDefinition.getDeploymentId());
        // 圖片輸入流
        InputStream inputStream = null;
        // 如果是上傳的是 xml 文件 , processDefinition.getImageResourceName() 就會是null .
        if(processDefinition.getImageResourceName()==null){
            String did = processDefinition.getDeploymentId();
              DefinitionImage definitionImage = this.getJbpmService().findImageByDefinitionId(did);  //自己寫的Service不是JBPM的API
              if(definitionImage!=null){
                  //  通過 這個 xml 的 流程id 找到它在數據庫 definitionImage表中的記錄 ,中間也有他的 圖片名稱
                  // 從而構造出 inputStream 對象
                  String uploadRoot = super.getRequest().getRealPath("/upload/jpdl/"+definitionImage.getImageName());
                 try {
                    inputStream = new FileInputStream(uploadRoot);
                } catch (FileNotFoundException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
              }

        }else{
            // 從數據庫讀到的輸入流 .
            inputStream = repositoryService.getResourceAsStream(processDefinition.getDeploymentId(),processDefinition.getImageResourceName());
        }
        byte[] b = new byte[1024];
        int len = -1;
        try {
            ServletOutputStream sos = this.getResponse().getOutputStream();
            while ((len = inputStream.read(b, 0, 1024)) != -1) {
                sos.write(b, 0, len);
            }
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }

3.查詢流程定義 (相當於Class,流程實例相當於new 的類)
List<ProcessDefinition> definitionList =  this.getProcessEngine().getRepositoryService().createProcessDefinitionQuery().list();

4.開啓流程，已經有動態表單了。
                String id=reuqest.getParameter("id");  //得到流程定義ID
                // 得到當前用戶
                UserInfo userInfo = super.getLoginUser();
                //爲了方便測試 , 先寫死
                Map<String, Object> map = new HashMap<String, Object>();
                map.put(Definition_Action.USER_INFO, userInfo.getUserId());
                // 爲什麼這裏不能有多個參數
                map.put(Definition_Action.FORM_ID, formId);  // form 表單 id
                // 得到專門操作流程實例的 執行對象
                System.out.println(map);
                ExecutionService executionService = this.getProcessEngine()
                        .getExecutionService();

                // 開啓實例  ,  ProcessInstance 對象好像對應的就是 ExecutionService 的表
                ProcessInstance pi = executionService.startProcessInstanceById(id,map);

5.上傳流程定義
    /*
     * 上傳方法 (non-Javadoc) , 方法名寫錯了 , 應該是 uploadDefinition
     * 難點
     * 1. 上傳的 zip 格式就很好處理
     * 2. 上傳的是 xml , 要複雜一點 , 因爲 xml 文件是不帶 png 流程圖的 , 這樣的話就實現不了流程跟蹤了 ,
      * 所有要去網上找了個 根據  xml 生成流程圖 png 的工具 (這個方法中沒實現 ) ,
      * 3.  把 xml的 流程id 和 生成的流程圖名寫到數據庫中,當然前提是,把 xml要上傳到 tomcat 先.
    */
    File src = this.getUpload();
        // 得到  "知識庫" service
        RepositoryService rService = this.getProcessEngine().getRepositoryService();

        String fileName = this.getUploadFileName();
        String ext = fileName.substring(fileName.lastIndexOf(".")+1,fileName.length());

        if(ext.equals("zip")){
            try {
                ZipInputStream zis = new ZipInputStream(new FileInputStream(src));
                rService.createDeployment().addResourcesFromZipInputStream(zis)
                        .deploy();
            } catch (Exception e) {
                // TODO: handle exception
                e.printStackTrace();
            }
        }else if(ext.equals("xml")){
        //如果上傳成功後就要放到自己的表中保存起來。
        //流程定義對象 id
        String definitionId = rService.createDeployment().addResourceFromInputStream(this.getUploadFileName(),new FileInputStream(src)).deploy();
    }

6.刪除流程定義
    RepositoryService repositoryService = this.getProcessEngine().getRepositoryService();
    //刪除要流程部署ID
    repositoryService.deleteDeploymentCascade("depolymentId");

7.查詢我的任務
    TaskService taskService = this.getProcessEngine().getTaskService();
    //得到用戶任務
    List<Task> taskList = taskService.findPersonalTasks(userInfo.getUserId());
    //SQL:select * from JBPM4_TASK where assignee=?;

    // 得到任務變量 formId   ？？ var這裏是不是在上面(開啓流程)已經定義好了的。
        Object formId = taskService.getVariable(task.getId(), Definition_Action.FORM_ID);