Question

I need the properties changes made programatically to persist a server reboot, redeployment, ect. Basically, I need modify the properties file when changes are made. Is this even possible? Currently, I have the properties working but the values dont ever change in the properties folder.

            String realPath = getPortletContext().getRealPath("/");

        FileInputStream in = new  FileInputStream(realPath+"json.properties");



        Properties p = new Properties();
        p.load(in);

        System.out.println(p.getProperty("json"));

              in.close();
        p.setProperty("json", "test");
        System.out.println(p.getProperty("json"));

        FileOutputStream out = new FileOutputStream(realPath+"json.properties");
        p.store(out, "test");
        in.close();

       out.close(); 

       System.out.println(com.liferay.util.portlet.PortletProps.get("json"));
       com.liferay.util.portlet.PortletProps.set("json", "change");
       com.liferay.util.portlet.PortletProps.set("new", "change");
       System.out.println(com.liferay.util.portlet.PortletProps.get("new"));

portal.properties:

json=help
new=new1

json.properties

json=blank

output when code is ran:

blank
test
help
change

As you can see above, I have tried using regular java properties and tried using the liferay properties. I need to basically need to get some json, edit it, then save it for later use. I need the changes to persist until edited again.

Answer 1

All of my previous code is junk the way I solved it was to use

            PortletPreferences portletPreference = actionRequest.getPreferences();

        portletPreference.setValue("help", "me");
        portletPreference.store();

Note: I tried this before with no luck and the problem was my imports. make sure that you use
javax.portlet.PortletPreferences; and not the liferay portletpreferences class.