Many thanks James. I presume that for ActiveMq, you means this feature to browse the queues :
http://activemq.apache.org/activemq-command-line-tools-reference.html#ActiveMQCommandLineToolsReference-browse KR, Charles James.Strachan wrote: > > 2008/11/21 cmoulliard <[EMAIL PROTECTED]>: >> >> Many thanks for your reply Claus, >> >> After performing internet search, I have found that in the JMS >> specification, a Selector has been defined to filter messages on the >> queue >> engine. >> >> "Selectors are defined using SQL 92 syntax and typically apply to message >> headers; whether the standard properties available on a JMS message or >> custom headers you can add via the JMS code. ActiveMq has implemented >> this : >> http://activemq.apache.org/selectors.html."; >> >> The Message selector will not resolve my problem because they allow to >> filter messages on the queue engine but not to perform query against >> queueing engine. > > You can browse queues using the queue browser - you can also browse > supplying a selector to filter it. > >> By the way, I'm not really sure that this is a good idea to perform query >> against queue(s). This is probably better to save the content of the >> messages in a DB and updated them when specific events occur. > > It depends on your requirements really. Message brokers are designed > to support selectors on topics/queues and queue browsing. However > selectors are quite simple; they only work on headers on the message. > If you want complex queries - or content based queries and you don't > want to work in a stream based manner like messaging but want a > repository/database of data to process/update/filter on demand > whenever, then sure use a database. > > -- > James > ------- > http://macstrac.blogspot.com/ > > Open Source Integration > http://fusesource.com/ > > ----- Enterprise Architect Xpectis 12, route d'Esch L-1470 Luxembourg Phone +352 25 10 70 470 Mobile +352 621 45 36 22 e-mail : [EMAIL PROTECTED] web site : www.xpectis.com www.xpectis.com My Blog : http://cmoulliard.blogspot.com/ http://cmoulliard.blogspot.com/ -- View this message in context: http://www.nabble.com/Strategy-to-select-messages-from-a-queue---tp20617081s22882p20658683.html Sent from the Camel - Users mailing list archive at Nabble.com.
