How to get LoggedIn User ID on Process Form

Requirement:

We need to see that who has modified particular field on Process Form or we want LoggedIn "User Login" on Process Form for some purpose

Solution:

Here are the steps to accomplish the same:

Note: I am demostrating the solution using Process Task Adapter. You can use other options as well as per requirement

• Create Java Code

public String printLoggedInUser(tcDataProvider dataProvider){
        System.out.println("INSDIE printLoggedInUser ");
        String loggedInUserID = "";
        try {
            loggedInUserID = dataProvider.getUserLogin();
            System.out.println("loggedInUserID :: " + loggedInUserID);
        } catch (tcDataAccessException e) {
            e.printStackTrace();
        } catch (tcClientDataAccessException e) {
            e.printStackTrace();
        }
        return loggedInUserID;
    }

• Make JAR file and paste in /xellerate/JavaTasks directory
• Create Process Task Adapter and map variables as below

                          Input - Adapter Reference - Database Reference 

                          Output - Return Variable

• Build the Adapter
• Attach your Adapter with a Task in the Process Definition. 
• Call this task on Successful Updation of Attribute Task
• Map the Adapter Return Value with 
• Process Data -- Form Field say UD_TEST_LOGGEDIN 
• Save and Test