Browsing queues is a core JMS feature... http://java.sun.com/j2ee/1.4/docs/api/javax/jms/Session.html#createBrowser(javax.jms.Queue,%20java.lang.String)
so you can do it with JMS code, Camel, command line tools etc 2008/11/24 cmoulliard <[EMAIL PROTECTED]>: > > 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. > > -- James ------- http://macstrac.blogspot.com/ Open Source Integration http://fusesource.com/
