Hi Luca,
a ConcurrentModificationException on a HashMap is usually thrown when
an Iterator is being used and the map gets modified, either by another
thread or by the same thread. If you obtain an iterator from the
cache, then clean it, then call iterator.next(), you'll get the
exception.
Since AspectJ does not do any thread magic, I don't think this is an
AspectJ related issue.
Anyway, please note that you are resetting the cache ALSO everytime
doInBackground is called, maybe it is the correct and expected
behavior, but is different from what you state in the mail, could that
be the error?
Simone
Il giorno 05/dic/08, alle ore 12:27, Luca Ferrari
<[EMAIL PROTECTED]> ha scritto:
Hi all,
I got a ConcurrentModificationException using an aspect but I don't
understand
why. This is the situation: I've got a LazyLoadingCache object
(singleton)
that thru a few synchronized methods allows the insertion/deletion
of entries
in the cache. The cache internally uses a HashMap to store the
information.
Then I've got the following pointcut:
pointcut emptyLazyLoadingCache() :
(execution( public static List
g2.database.mapping.*.loadAll(ProgressObserver) throws
DatabaseException )
||
execution( protected ListTableModel
g2.gui.workers.TableSwingWorker.doInBackground() throws Exception )
)
&&
(! cflow(adviceexecution()) )
;
that catches when a "loadAll" action is issued. The aim is to reset
the cache
for a complete reload of the data. To achieve this, the following
advice is
defined:
before() : emptyLazyLoadingCache(){
Class ownerClass = ...
....
// empty the cache
int refactor = this.llCache.emptyCacheForClass( ownerClass );
}
where llCache is the singleton instance of the cache, and the
emptyCacheForClas method is a synchronized method that performs a
remove on
the hashmap. However, I got the above exception, and I've checked
printing the
thread ids and each time the thread is always the same (that is a
SwingWorker). Any idea about where and how to investigate?
Thanks,
Luca
_______________________________________________
aspectj-users mailing list
[email protected]
https://dev.eclipse.org/mailman/listinfo/aspectj-users
_______________________________________________
aspectj-users mailing list
[email protected]
https://dev.eclipse.org/mailman/listinfo/aspectj-users
