users@grizzly.java.net

Re: How-to attach an ID to a Connection?

From: Oleksiy Stashok <Oleksiy.Stashok_at_Sun.COM>
Date: Thu, 22 May 2008 17:57:10 +0200

Hi John,

IMHO right thing to do - is to store Attributes in ThreadAttachment.
You can set it directly using ThreadAttachment or
ctx.getAttributeHolderByScope(AttributeScope.CONNECTION).

It shouldn't be overwritten :)

Thanks.

WBR,
Alexey.

On May 22, 2008, at 17:45 , John ROM wrote:

> I'm only using the basic grizzly framework module and building an
> server.
>
> I have selectionKeys which (hopefully) often last 12 hours.
>
> With each connection I need to store an Integer (project_id).
>
> This Integer will then be retrieved with code like:
> //iterate over all existings connections and find
> // keys with specific ids.
>
> selector.selectNow()
>
> Set<SelectionKey> selectionKeys = tCPSelectorHandler.keys();
> for (SelectionKey key : selectionKeys) {
> if(key.valid()
> // Get Integer out of maybe ThreadAttachment
> key.attachment();
> }
> }
>
>
> I am a little afraid that Grizzly might overwrite the attachment
> in my keys.
>
> Maybe its better to store the integers somewhere else together with
> selectorKey.hashcode() and hope that two keys will never have the same
> hashcodes...
>
> So....
>
> What is the best way to attach something to an selectorKey or in other
> words what is the pendant to
> AttributeHolder connectionAttrs =
>
> ctx.getAttributeHolderByScope(AttributeScope.CONNECTION);
>
>
> Many Greetings John
>
>
>
>
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