RE: [aspectj-users] Custom MessageHandler for static pointcuts

["Wes Isberg" <wes@xxxxxxxxxxxxxx>]

Hi Chuck -

I just did an experiment and found that printing to System.out
didn't work (is Ant suppressing it?), but printing to a file did.
My code is below.

Regarding IMessageHolder, the basic contract it inherits for
IMessageHandler.handleMessage(IMessage) is just that it's called for 
each message, so your code should gain control as mine did to write
the message.  Whether you configure a MessageHandler you extend to 
only accumulate messages shouldn't make a difference.

I hope this works for you...
Wes

------------------ Handler.java
import java.io.*;
import org.aspectj.bridge.*;

public class Handler extends MessageHandler {
    public Handler() {
        super(true);
    }

    public boolean handleMessage(IMessage m) {
        try {
            Writer w = null;
            try {
                w = new FileWriter("output.txt", true);
                new PrintWriter(w).println("got " + m);
            } finally {
                if (null != w)
                    w.close();
            }
        } catch (IOException e) {
            throw new Error(e);
        }
        return super.handleMessage(m);
    }
}


> ------------Original Message------------
> From: "Charles Daniels" <cjd4@xxxxxxxxx>
> To: aspectj-users@xxxxxxxxxxx
> Date: Thu, Sep-23-2004 10:10 PM
> Subject: RE: [aspectj-users] Custom MessageHandler for static pointcuts
>
> Hi Wes,
> 
> Thanks for your quick reply.  Unfortunately, I'm not forking, and I 
> still
> can't see what is happening.  Using Maven, I added the -X option to 
> show
> debugging output and saw that it was loading my IMessageHolder
> implementation.  However, I still see no difference in behavior and I 
> see no
> exception.
> 
> Anyway, I did some digging through the source, as you suggested.  What 
> I
> found is that perhaps IMessageHolder is not used as I suspected.  I 
> looked
> at MessageHandler (the default IMessageHolder implementation), and it 
> only
> accumulates messages.  I don't know where the messages actually get 
> sent to
> output (or wherever they actually get sent -- logger/listener?).  I 
> just
> want to be able to capture error messages from 'declare warning'
> declarations and write them to a file that I can transform into a 
> report.
> 
> Cheers,
> Chuck
> 
> > -----Original Message-----
> > From: aspectj-users-admin@xxxxxxxxxxx
> > [mailto:aspectj-users-admin@xxxxxxxxxxx]On Behalf Of Wes Isberg
> > Sent: Thursday, September 23, 2004 7:13 PM
> > To: aspectj-users@xxxxxxxxxxx
> > Subject: Re: [aspectj-users] Custom MessageHandler for static 
> pointcuts
> >
> >
> > You're probably forking; there should be a log message saying
> > "message holder ignored when forking [...]", but perhaps Ant
> > has to be in verbose mode for you to see the log message. It's
> > ignored when forking because it's implemented programmatically
> > from Ant rather than being supported on the -ajc command line
> > (which is what's forked).
> >
> > The documentation for MessageHandlers is just the mention in
> > the iajc docs and the IMessageHandler source code.  See also
> > the code for AjcTask (iajc) and org.aspectj.tools.Ajc.
> >
> > Hope this helps; let us know if it's something else...
> >
> > Wes
> >
> > P.S. - If you must fork, you might consider taking the messages
> > in XML form from Ant and selecting your messages during the
> > transform.  (I haven't done this myself, so I'm just speculating.)
> >
> > > ------------Original Message------------
> > > From: "Charles Daniels" <cjd4@xxxxxxxxx>
> > > To: aspectj-users@xxxxxxxxxxx
> > > Date: Thu, Sep-23-2004 1:55 PM
> > > Subject: [aspectj-users] Custom MessageHandler for static pointcuts
> > >
> > > Hi All,
> > >
> > > I am attempting to implement my own MessageHandler for collecting
> > > "policy
> > > violations" detected by static pointcuts (declare warning and 
> declare
> > > error).  I want my handler to generate an XML report that I can 
> then
> > > transform into an HTML report.  Unfortunately, when I run iajc, it
> > > completely ignores the handler implementation that I specify (no 
> error
> > > message either).  I cannot find and documentation on the use of
> > > MessageHandlers.  Can anybody shed some light on this topic?
> > >
> > > Thanks,
> > > Chuck
> > >
> > > _______________________________________________
> > > aspectj-users mailing list
> > > aspectj-users@xxxxxxxxxxx
> > > http://dev.eclipse.org/mailman/listinfo/aspectj-users
> > >
> >
> >
> > _______________________________________________
> > aspectj-users mailing list
> > aspectj-users@xxxxxxxxxxx
> > http://dev.eclipse.org/mailman/listinfo/aspectj-users
> 
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