Hello
Is this dangerous to work at the same time with a Hashtable and an Enumeration on it ?
For example, I'm using a Hashtable to store some objets... these objets are very often put/remove/get.
Periodicaly, a "cleaner" is waking up and using an enumeration on this table to clean (remove) expired objects from Hashtable...
Thanks
Ludovic
> Is this dangerous to work at the same time with a
> Hashtable and an Enumeration on it ?
I'd guess "yes".
Hashtable's javadoc (check it out) warns against Iterators, but not so clearly against Enumerations. It does mention that Enumerations aren't checked as eagerly against concurrent modification.
A quick hack is to do the enumeration inside synchronize(myHashtable). It should work, though it feels like a bit of a dirty trick to me - like mucking with Hashtable's internal implementation. Preferably lock on some other suitable object - probably the one that contains the Hashtable.
