You might want to use something like this:
//<String,Visit> is the sessionid and the Visit Object
private static ConcurrentHashMap<String,Visit> visitHistory_ = new
ConcurrentHashMap<String,Visit>();
and implement it as a singleton with synchronized accessor methods.
Glen Vermeylen wrote:
We use Tomcat 5.5.20.
I actually have no synchronization in place whatsoever. I will change to
hashtable and see if it solves the problem.
Thank you.
2007/3/7, Caldarale, Charles R <[EMAIL PROTECTED]>:
> From: Glen Vermeylen [mailto:[EMAIL PROTECTED]
> Subject: Retrieve list of all sessions
>
> I've created a management screen which lists all currently
> logged in users. This list is kept as a hashmap and is kept
> "in sync" with reality in the following way:
A HashMap is unsynchronized; does your logic provide the necessary
synchronization for insertions, deletions, *and* retrievals? If not,
switching to a HashTable might resolve your problem.
Or then again, it might just be a bug, but you didn't tell us the
version of Tomcat you're using, so searching bugzilla would be rather
tedious.
- Chuck
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