JSP: Code to Refresh File

Question

currently I am working with XML, JSP, and Activiti Workflow Engine. On my project, I have following processes:

An employee submit a JSP Form
When the form is submitted, I will update my xml file to change the name of a tag. For example, from: "Sign Document" into "Sign Document 1". 1 here represent the ID of the data in my database
After the file has successfully updated, the program will directly deploy Activiti Workflow Engine Process based on my updated XML file

I have successfully update my xml file and deploy the process, but when I got some problem with the name of the XML tag. The problem is:

After the XML file successfully updated, my program will not directly used the latest file, but it used the old one. So for example, before I update the XML file, the name of the tag is "Sign Form" and after I updated the file, the tag name on the file will become "Sign Form 1". However, when I check my activiti database, it shows that activiti still used the xml file with tag name "Sign Form" not "Sign Form 1"

I guess it because I need to refresh the XML file first before run the deployment. But I don't know how to do so on JSP or Java. Anyone could help me? Thanks

Here is my code:

try {
            String filepath = "path/to/the/filename.bpmn20.xml";
            DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
            DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
            Document doc = docBuilder.parse(filepath);

            // Get the process element by tag name directly
            Node userTask = doc.getElementsByTagName("userTask").item(0);

            // update userTask attribute
            NamedNodeMap attr = userTask.getAttributes();
            Node nodeAttr = attr.getNamedItem("name");
            nodeAttr.setTextContent("Review and Sign Form "+id);

            // write the content into xml file
            TransformerFactory transformerFactory = TransformerFactory.newInstance();
            Transformer transformer = transformerFactory.newTransformer();
            DOMSource source = new DOMSource(doc);
            StreamResult result = new StreamResult(new File(filepath));
            transformer.transform(source, result);

            System.out.println("Done");

           } catch (ParserConfigurationException pce) {
            pce.printStackTrace();
           } catch (TransformerException tfe) {
            tfe.printStackTrace();
           } catch (IOException ioe) {
            ioe.printStackTrace();
           } catch (SAXException sae) {
            sae.printStackTrace();
           }

Can you post the code how you are updating the xml in database? — Keerthivasan, Apr 03 '14 at 09:42
i dont think it is a problem from my xml file. but, on my java code: Here is my java code: ch.changeBO(id+1); dp.deployProcess(); ch.changeBO(id+1) was used to changed the XML file and dp.deployProcess() was used to deploy the process (which will used my xml file) And I think the problem is I tried to use my xml file without refresh them, so the compiler didnt notice the change. — pokopang, Apr 03 '14 at 09:55

score 0 · Accepted Answer · edited May 23 '17 at 11:49

0

You can just read file, replace the string of XML content and write the revised content back to XML.

Reference: Find and replace words/lines in a file

edited May 23 '17 at 11:49

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answered Apr 03 '14 at 09:31

Stanley Stein

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JSP: Code to Refresh File

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