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atse · Posted: Tue Feb 01, 2005 7:03 am Post subject:

Hi, I'm a new user for both Workflow and WebClient. I want to create a custom handler that uses a session bean that updates the db when I check in a work item. I tried to follow the wa84 extentions and the samples given in WebClient when creating my new handler class but there still things I don't understand and I'm sure I'm missing some implementation.

My new handler class extends GenericCommandHandler, and contains the methods init and updateDb, where updateDb is the method that handles what the command should do. The method returns ResponsePage and takes in HttpServletRequest and HttpServletResponse as parameters. Since in this method, after handling the session bean update, I want the command to checkin the work item, I added in these lines which I got from the examples and assume that will handle the checkin:

SessionContext sc;
RequestContext retval = null;
BuiltinHandler bh;
try {
sc = getSessionContext(request);
bh = sc.getBuiltinHandler();
retval = bh.checkInWorkItem(request, response);
return bh.render("checkInWorkItem", retval);
}

I then changed the WebClient.propertities file so that it uses the CommandHandlerAdapter (since I'm using wa84 as well), and set my new Handler to the next consective number:

com.ibm.workflow.servlet.clientx.wext.ReuseProcessDataHandler = 0
com.ibm.workflow.servlet.clientx.wext.RestartAsDraftHandler = 1
com.ibm.workflow.servlet.clientx.wext.ChangePageHandler = 2
com.ibm.workflow.servlet.clientx.wext.PageEventHandler = 3
com.ibm.workflow.servlet.sample.MyNewUpdateHandler = 4

This is the part I don't know if I'm doing correctly: in my Jsp, for my submit button, instead of the name "checkinWorkitem" I changed it to my command name: updateDb. When I run it and click the button, I receiver the error: Invalid command sent: updateDb.

Since the examples of the handlers given have such poor documentations, I'm really having trouble understanding how to implement a custom handler properly. I used lot of the codes where I just put in hoping it does what I think it should do. So please let me know what I'm doing wrong or if I should even be building a custom handler for what I'm trying to do. If there are better references where I could figure it out myself, please also let me know. Thank you in advance for anyone's help!