<div dir="ltr">I think you want to use RabbitMQ's message acknowledgement.<div><br></div><div>The general idea is that you:</div><div>- Consume a message</div><div>- Process it</div><div>- Acknowledge to RabbitMQ that you've processed it, which causes it to be deleted from the queue.</div><div><br></div><div>You can read more at <a href="https://www.rabbitmq.com/confirms.html">https://www.rabbitmq.com/confirms.html</a></div><div><br></div><div>If you're using the Erlang RabbitMQ client, you can do something like this when subscribing:</div><div><div><br></div><div> #'basic.consume_ok'{} = amqp_channel:subscribe(Channel, #'basic.consume'{queue = Queue, no_ack = false}, self()),</div></div><div><br></div><div>Then, when you've handled your message, you call:</div><div><br></div><div> amqp_channel:cast(Channel, #'basic.ack'{delivery_tag = Tag}).<br></div><div><br></div><div>Hope this helps</div><div><br></div><div>Cheers</div><div>Sölvi</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, May 12, 2017 at 11:55 AM, Kareem Hepburn <span dir="ltr"><<a href="mailto:kareemgan@gmail.com" target="_blank">kareemgan@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Is it possible with RabbitMQ to consume a message without it being deleted and be deleted manually?<div><br></div><div>Because let's say I consumed a message and started to process it and half way through processing it the application fails. I want to be able to re-process that message again. Is it possible to not delete the message and delete it manually after my process has successfully completed?</div><div><br></div><div>To avoid duplication, I plan to use a secondary database, either Redis or Memcache to store the ID of the message to ensure that it's not being processed by more than one application.</div><div><br></div><div>Thanks!</div><span class="HOEnZb"><font color="#888888"><div><div><br></div>-- <br><div class="m_-2151179266201818271gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><p style="color:rgb(0,0,0);font-family:Helvetica,Arial,sans-serif;font-size:14px;line-height:16px"><a href="http://kareemgan.com" target="_blank"><img src="https://www.filepicker.io/api/file/bA8XKrWKSkK0BI8wzeUM/convert?w=150&h=55&fit=clip" alt="kareemgan" border="0"></a></p><p style="font-family:Helvetica,Arial,sans-serif;font-size:14px;line-height:16px;color:rgb(153,153,153)"><span style="font-weight:bold;color:rgb(4,4,4)">Kareem Gan</span> <span>/</span> <span style="color:rgb(4,4,4)">Software Engineer</span><br><a href="mailto:kareemgan@gmail.com" style="color:rgb(82,198,6)" target="_blank">kareemgan@gmail.com</a></p><p style="color:rgb(0,0,0);font-family:'Times New Roman';font-size:medium"></p><p style="color:rgb(0,0,0);font-family:'Times New Roman';font-size:14px;line-height:16px"><a href="https://github.com/magicalbanana" target="_blank"><img src="http://i.imgur.com/1xutCgX.png" alt="Skype"></a> <a href="http://facebook.com/dopankey" target="_blank"><img src="http://i.imgur.com/VMddafd.png" alt="Facebook"></a> <a href="http://@kareemgan" target="_blank"><img src="http://i.imgur.com/oGRkUcK.png" alt="Twitter"></a> <a href="https://plus.google.com/108299918329354290658" target="_blank"><img src="http://i.imgur.com/oYZJ1x0.png" alt="Google Plus"></a> <a href="https://linkedin.com/in/kareemgan" target="_blank"><img src="http://i.imgur.com/p2pS6d0.png" alt="Linkedin"></a> <a href="http://kareemgan" target="_blank"><img src="http://i.imgur.com/wDtczaw.png" alt="Skype"></a></p><p style="font-family:Helvetica,Arial,sans-serif;color:rgb(4,4,4);line-height:16px">This e-mail message may contain confidential or legally privileged information and is intended only for the use of the intended recipient(s). Any unauthorized disclosure, dissemination, distribution, copying or the taking of any action in reliance on the information herein is prohibited. E-mails are not secure and cannot be guaranteed to be error free as they can be intercepted, amended, or contain viruses. Anyone who communicates with us by e-mail is deemed to have accepted these risks. Company Name is not responsible for errors or omissions in this message and denies any responsibility for any damage arising from the use of e-mail. Any opinion and other statement contained in this message and any attachment are solely those of the author and do not necessarily represent those of the company.</p></div></div></div></div></div></div></div>
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