<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Message that didn't get posted to the list yesterday:<br><div><br><html>Begin forwarded message:</html><br class="Apple-interchange-newline"><blockquote type="cite"><div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" color="#000000" style="font: 12.0px Helvetica; color: #000000"><b>From: </b></font><font face="Helvetica" size="3" style="font: 12.0px Helvetica">Ben Hood <<a href="mailto:0x6e6562@gmail.com">0x6e6562@gmail.com</a>></font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" color="#000000" style="font: 12.0px Helvetica; color: #000000"><b>Date: </b></font><font face="Helvetica" size="3" style="font: 12.0px Helvetica">10 April 2008 11:55:49 BST</font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" color="#000000" style="font: 12.0px Helvetica; color: #000000"><b>To: </b></font><font face="Helvetica" size="3" style="font: 12.0px Helvetica">Joe Lee <<a href="mailto:codewalkerjoe@gmail.com">codewalkerjoe@gmail.com</a>></font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" color="#000000" style="font: 12.0px Helvetica; color: #000000"><b>Subject: </b></font><font face="Helvetica" size="3" style="font: 12.0px Helvetica"><b>Re: [rabbitmq-discuss] pub-sub part 2: erlang consume</b></font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div> </div>Joe,<br><br>On 10 Apr 2008, at 00:17, Joe Lee wrote:<br><blockquote type="cite">(rabbit@home)5> amqp_async_consume:amqp_lifecycle_consume().<br></blockquote><blockquote type="cite">Connection: {<0.178.0>,direct}<br></blockquote><blockquote type="cite">** exception exit: {{amqp_async_consume,amqp_lifecycle_consume,0},<br></blockquote><blockquote type="cite"> {line,40},<br></blockquote><blockquote type="cite"> match,<br></blockquote><blockquote type="cite"> [{'queue.declare_ok',<br></blockquote><blockquote type="cite"> <<"amq.q.gen1_rabbit@home_20080409224223_">>,0,0}]}<br></blockquote><blockquote type="cite"> in function amqp_async_consume:amqp_lifecycle_consume/0<br></blockquote><br>The reason why this is not working is because the LHS does not match the RHS.<br><br>You are trying to match this tuple<br><br>#'queue.declare_ok'{queue = Q,<br> message_count = MessageCount,<br> consumer_count = ConsumerCount}<br> = amqp_channel:call(Channel,QueueDeclare)<br><br>with this tuple:<br><br><blockquote type="cite">{'queue.declare_ok',<br></blockquote><blockquote type="cite"> <<"amq.q.gen1_rabbit@home_20080409224223_">>,0,0}<br></blockquote><br><br>so that fact that Q, which was previously bound to <<"">> is being compared to <"amq.q.gen1_rabbit@home_20080409224223_">> which violates the match condition.<br><br>To fix this, don't re-use the *variable* Q, because in Erlang, it's not really a variable (non-destructive assignment).<br><br>HTH,<br><br>Ben<br></blockquote></div><br></body></html>