Who calls the "onMessage" method? If you use the "call" pointcut
designator, AspectJ has to be able to weave the handler "advice" into
the code that does the calling. If that code is in a third-party jar
that you don't want to modify, then use "execute" instead:
pointcut handleException(Message m):
execution(* myBean.onMessage(Message)) && args(m);
dean
On Sep 29, 2008, at 7:55 AM, <[EMAIL PROTECTED]> wrote:
Ok,
Ive changed this to match the following
pointcut handleException(Message m):
call (* myBean.onMessage(Message)) && args(m);
after(Message m) throwing (Exception ex): handleException(m)
{
//handle exception here
}
However, the pointcuts doesnt seem to get matched... have I got this
all wrong?
I want to be able to access the message inside the handler,
prefereably.
Andy
----- Original Message ----
From: Dean Wampler <[EMAIL PROTECTED]>
To: [email protected]
Sent: Monday, 29 September, 2008 1:21:14 PM
Subject: Re: [aspectj-users] catching container managed transactions
Andy,
A little more information you might find useful. Since you print a
message with the exception, you'll need to "bind" it with the
"throwing":
after() throwing(Exception ex): mypointcut() {
System.out.println("Error here, guv" + e);
}
Also, just to be clear, if you actually wanted to recover from the
exception, you can't do that with after throwing. The exception will
still get thrown up the stack. To recover, you would have to use
around advice.
dean
On Sep 29, 2008, at 7:00 AM, <[EMAIL PROTECTED]> wrote:
Hi
You are using an around advice:
void around(Message m) throws Exception: handleException(m)
{
try
{
proceed(m);
}
catch(Exception e)
{
System.out.println("Error here,guv "+e);
throw e;
}
}
the alternativ is using an after advice with a throwing clause.
That means that the advice is only executed if your pointcut throws
an exception.
after() throwing: mypointcut() {
//handle exception here
}
mvh
Hermod
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
] On Behalf Of [EMAIL PROTECTED]
Sent: Monday, September 29, 2008 1:37 PM
To: [email protected]
Subject: Re: [aspectj-users] catching container managed transactions
Im not sure i follow, can you give a quick 1-liner example, or
point me to a relevant doco?
thanks.
Andrew
----- Original Message ----
From: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
To: [email protected]
Sent: Monday, 29 September, 2008 9:55:30 AM
Subject: RE: [aspectj-users] catching container managed transactions
Hi
Why don't you use "after returning throwing" instead of around
advice.
Hermod
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
] On Behalf Of [EMAIL PROTECTED]
Sent: Monday, September 29, 2008 10:31 AM
To: [email protected]
Subject: [aspectj-users] catching container managed transactions
Hi
I have a message driven bean which, inherently, throws an exception
back to the container to rollback jms messsages.
I want to be able to catch this exception, log something, and then
let the exception carry on.
I have a pointcut defined as follows:
pointcut handleException(Message m):
call (* myBean.onMessage(Message)) && args(m);
With the advice being:
void around(Message m) throws Exception: handleException(m)
{
try
{
proceed(m);
}
catch(Exception e)
{
System.out.println("Error here,guv "+e);
throw e;
}
}
My question is two-fold:
1) Can we throw the exception like this and will the throw go back
to the container managed transaction??
2) Is this the right way to do this kind of thing? (im assuming
not, as the advice is marked as 'Not matched', but maybe this is
one for the ajdt guys.)
Sorry - im completely new to this stuff....
Regards,
Andy
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http://www.contract4j.org Design by Contract for Java5
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dean at objectmentor.com
http://www.objectmentor.com
See also:
http://www.polyglotprogramming.com Multi-language and multi-paradigm
programming
http://www.aspectprogramming.com AOP advocacy site
http://aquarium.rubyforge.org AOP for Ruby
http://www.contract4j.org Design by Contract for Java5
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