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</o:shapelayout></xml><![endif]--></head><body lang=LT link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-GB>Hi.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>I have occasionally connected clients (subscribers) which bids to non-durable, exclusive, autodelete queue with their own ID.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>I’m looking how to check which of the clients is online (queues with known ids is available) or not.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>If I could get a list of available queues I could compare their names with ID to know which subscribers is online.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB>Also if there would be method to check is queue available I could iterate through my list and check it.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>Rabbitmqctl has method to get list of available queues, but I haven’t found any way doing this using client.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>I have founded one solution using QueueDeclare and passive flag:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal style='text-indent:64.8pt;text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas;color:blue'>bool</span><span style='font-size:9.5pt;font-family:Consolas'> QueueAvailable = <span style='color:blue'>false</span>;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas'> <span style='color:blue'>try</span><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas'> {<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas'> <span style='color:blue'>var</span> m = ch.QueueDeclare(routingKey, <span style='color:blue'>true</span>, <span style='color:blue'>false</span>, <span style='color:blue'>true</span>, <span style='color:blue'>true</span>, <span style='color:blue'>false</span>, <span style='color:blue'>null</span>);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas'> QueueAvailable = <span style='color:blue'>true</span>;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas'> }<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas'> <span style='color:blue'>catch</span> { }<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>If there is no queue available I get an exception, but also this closes the connection so to check i.e. 500 queues I’ll need to make a lot of new connections every time.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>Maybe there is more elegant solution?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='mso-fareast-language:LT'>Best regards<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='mso-fareast-language:LT'>Andrius Norkaitis<o:p></o:p></span></p></div></body></html>