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From: Lew <noone@lewscanon.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: Concurrent bidirectional one-to-many map?
Date: Wed, 11 May 2011 09:00:23 -0400
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On 05/11/2011 04:51 AM, Sebastian wrote:
> Am 11.05.2011 10:09, schrieb Sebastian:
>>
>>
>> Here's a bit of the WorkspaceManager code referred to above:
>>
>> public void closeWorkspace( UUID id )
>> {
>> writeLock.lock(); // <<<<<<<<<<< necessary ?
>> try {
>> Workspace wp = wpMap.remove( id );
>> ...
>
> As afterthought to my immediately preceding post,
> let me add that it would be nice if we could process
> unrelated workspaces in parallel. How about having a
> ReentrantReadWriteLock associated with each workspace,
> and using themlike this:
>
> Workspace wp = wpMap.get( id );
> wp.writeLock.lock();
> try {
> wpMap.remove( id );
> ...
>
> Wouldn't this improve things?

Why have you never answered my questions about long locks?

You seem to be going through a lot of gyrations unnecessarily.  Just lock the 
data you need to lock.

It's kind of rude that you ask for help but don't respond to requests for 
further information.

-- 
Lew
Honi soit qui mal y pense.
http://upload.wikimedia.org/wikipedia/commons/c/cf/Friz.jpg