Re: [xmlblaster] Newbie question about QoS

[Michele <laghi at swissinfo.org>]

Hi Charles,

Charles Hsiao wrote:
> Hi,
>
> I need your help on getting the oldest message in the
> xmlBlaster and only retrieve one.
>
> Here is the definition of MessageUnit. 
> MsgUnit[] msgUnits =
> conn.get(xmlGetKey.toXml(),"<qos><querySpec
> type='QueueQuery'><![CDATA[maxEntries=1&maxSize=-1&consumable=true&waitingDelay=0]]></querySpec></qos>");
>
> I did get one message, but not sure if it is the
> oldest one.

Yes you get the oldest first (FIFO).
> The application that I am working on processes the
> messages based on the time of messages entering the
> system.
>
> Please point me to the right directory. BTW, is there
> any programing reference doc about xmlblaster?

The programming reference are the requirements:

http://www.xmlblaster.org/xmlBlaster/doc/requirements/requirement.html

(and of course there are the apis too)

For the particular case you are describing here, the most interesting 
requirement is:

http://www.xmlblaster.org/xmlBlaster/doc/requirements/engine.qos.queryspec.QueueQuery.html

Regards
Michele

> Many thanks for your help.
>
> Charles
>
>
>
> 		
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