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RE: [aspectj-users] Can I declare an advice as synchronized
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One other note: the original requester seemed to want to synchronize the
advice as a policy for some class of aspects. If you do want to synchronize
all the advice in a given aspect or all of some set of aspects, it is
crosscutting and you might use another aspect to do it, e.g.,:
package com.myco.concurrency;
aspect AspectSynchronization {
Object around(Object current) : adviceexecution() && this(current) &&
within(com.myco.errorhandling..*) {
synchronized(current) {
return proceed(current);
}
}
}
________________________________________
From: aspectj-users-bounces@xxxxxxxxxxx
[mailto:aspectj-users-bounces@xxxxxxxxxxx] On Behalf Of Ramnivas Laddad
Sent: Thursday, July 20, 2006 6:00 AM
To: aspectj-users@xxxxxxxxxxx
Subject: Re: [aspectj-users] Can I declare an advice as synchronized
An alternative is to use synchronized(this) surrounding the code in the
advice.
before() : myPC() {
synchronized(this) {
... advice code ...
}
}
-Ramnivas
Matthew Webster wrote:
The simple solution is to delegate the logic in you advice to a synchronized
instance method in the aspect. If you are using default aspect instantiation
it will be a singleton guaranteeing that only one thread will execute the
logic at a time. If you need to use thisJoinPoint/thisJoinPointStaticPart
their values can be passes as arguments to the new method.
Matthew Webster
AOSD Project
Java Technology Centre, MP146
IBM Hursley Park, Winchester, SO21 2JN, England
Telephone: +44 196 2816139 (external) 246139 (internal)
Email: Matthew Webster/UK/IBM @ IBMGB, matthew_webster@xxxxxxxxxx
http://w3.hursley.ibm.com/~websterm/
"Lorenzo D'Ercole" <lorenzodercole@xxxxxxxxxx>
Sent by: aspectj-users-bounces@xxxxxxxxxxx
20/07/2006 08:25
Please respond to
aspectj-users@xxxxxxxxxxx
To
<aspectj-users@xxxxxxxxxxx>
cc
Subject
Re: [aspectj-users] Can I declare an advice as synchronized
Well, I tryed to use the synchronized keyword writing:
synchronized before ....
but I have a compile error which says:
illegal modifier on advice, only strictfp allowed
For this reason I'm looking for another solution if it exists. Do you have
any idea?
bye
lollo82
----- Original Message -----
From: "Eric Bodden" <eric.bodden@xxxxxxxxxxxxxx>
To: <aspectj-users@xxxxxxxxxxx>
Sent: Wednesday, July 19, 2006 10:09 PM
Subject: RE: [aspectj-users] Can I declare an advice as synchronized
Hi.
> I'm using aspect in an concurrent application and I'd like to be
> sure that the advices are synchronized. In fact I don't want that more
> than one thread per time runs the advice code. Can I acchieve this
> result? I read that an aspect is a singleton on the aspectJ guide,
does
> it imply that only one thread per time is inside it?
No, that is not implied (as it is not for any other regular singleton).
But you can just use the synchronized keyword for your advice AFAIK.
Eric
--
Eric Bodden
Sable Research Group, McGill University
Montreal, Canada
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