Re: [akka-user] Unpersist a processor
Konrad, Got it; thanks. A use case that comes to my mind is user registration: There's a UserProfile actor, of course with a unique username, which could be used as actor name and/or processor id. Once a user decides to unregister, the user profile might have to be deleted for privacy reasons and it should also be possible to reuse the now free username. Does that make sense? Heiko On Sun, Mar 23, 2014 at 7:07 PM, Konrad Malawski ktos...@gmail.com wrote: Hello Heiko, This can be achieved but at expense of having to delete all messages stored in the journal for a given processor id. This can be done from within the Processor by calling deleteMessages(toSequenceNr = Long.MaxValue, permanent: Boolean = …), where permanent deletion is optional - soft deleted messages won't be replayed anyway, so it will seam as-if it's a fresh Processor. Hope this helps to answer the general question :-) If it's more of a real-world-app question, let's maybe check out an example scenario, because in general it feels a bit weird to re-use these ids (at least to me), as it might complicate reasoning about the system's state at some point in time… -- Konrad Malawski geecon.org / java.pl / krakowscala.pl / gdgkrakow.pl From: Heiko Seeberger heiko.seeber...@gmail.com Reply: akka-user@googlegroups.com akka-user@googlegroups.com Date: 23 March 2014 at 12:21:38 To: akka-user@googlegroups.com akka-user@googlegroups.com Subject: [akka-user] Unpersist a processor Hi, Is it possible to remove a processor from the journal, so its id can be reused as a fresh processor later? Thanks Heiko -- Read the docs: http://akka.io/docs/ Check the FAQ: http://doc.akka.io/docs/akka/current/additional/faq.html Search the archives: https://groups.google.com/group/akka-user --- You received this message because you are subscribed to the Google Groups Akka User List group. To unsubscribe from this group and stop receiving emails from it, send an email to akka-user+unsubscr...@googlegroups.com. To post to this group, send email to akka-user@googlegroups.com. Visit this group at http://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout. -- Heiko Seeberger Twitter: @hseeberger Blog: blog.heikoseeberger.name -- Read the docs: http://akka.io/docs/ Check the FAQ: http://doc.akka.io/docs/akka/current/additional/faq.html Search the archives: https://groups.google.com/group/akka-user --- You received this message because you are subscribed to the Google Groups Akka User List group. To unsubscribe from this group and stop receiving emails from it, send an email to akka-user+unsubscr...@googlegroups.com. To post to this group, send email to akka-user@googlegroups.com. Visit this group at http://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout.
Re: [akka-user] Unpersist a processor
Oh, yeah I can see that as a valid reason to reuse an id I guess - if that's the apps requirements. If one would want to have multiple users with the same username, an simple id could be appended to the username I guess - both flows easily supported by akka-persistence :-) -- Cheers, Konrad Malawski blog.project13.pl | java.pl | geecon.org | gdgkrakow.pl | krakowscala.pl 2014-03-24 7:17 GMT+00:00 Heiko Seeberger heiko.seeber...@gmail.com: Konrad, Got it; thanks. A use case that comes to my mind is user registration: There's a UserProfile actor, of course with a unique username, which could be used as actor name and/or processor id. Once a user decides to unregister, the user profile might have to be deleted for privacy reasons and it should also be possible to reuse the now free username. Does that make sense? Heiko On Sun, Mar 23, 2014 at 7:07 PM, Konrad Malawski ktos...@gmail.comwrote: Hello Heiko, This can be achieved but at expense of having to delete all messages stored in the journal for a given processor id. This can be done from within the Processor by calling deleteMessages(toSequenceNr = Long.MaxValue, permanent: Boolean = …), where permanent deletion is optional - soft deleted messages won't be replayed anyway, so it will seam as-if it's a fresh Processor. Hope this helps to answer the general question :-) If it's more of a real-world-app question, let's maybe check out an example scenario, because in general it feels a bit weird to re-use these ids (at least to me), as it might complicate reasoning about the system's state at some point in time… -- Konrad Malawski geecon.org / java.pl / krakowscala.pl / gdgkrakow.pl From: Heiko Seeberger heiko.seeber...@gmail.com Reply: akka-user@googlegroups.com akka-user@googlegroups.com Date: 23 March 2014 at 12:21:38 To: akka-user@googlegroups.com akka-user@googlegroups.com Subject: [akka-user] Unpersist a processor Hi, Is it possible to remove a processor from the journal, so its id can be reused as a fresh processor later? Thanks Heiko -- Read the docs: http://akka.io/docs/ Check the FAQ: http://doc.akka.io/docs/akka/current/additional/faq.html Search the archives: https://groups.google.com/group/akka-user --- You received this message because you are subscribed to the Google Groups Akka User List group. To unsubscribe from this group and stop receiving emails from it, send an email to akka-user+unsubscr...@googlegroups.com. To post to this group, send email to akka-user@googlegroups.com. Visit this group at http://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout. -- Heiko Seeberger Twitter: @hseeberger Blog: blog.heikoseeberger.name -- Read the docs: http://akka.io/docs/ Check the FAQ: http://doc.akka.io/docs/akka/current/additional/faq.html Search the archives: https://groups.google.com/group/akka-user --- You received this message because you are subscribed to the Google Groups Akka User List group. To unsubscribe from this group and stop receiving emails from it, send an email to akka-user+unsubscr...@googlegroups.com. To post to this group, send email to akka-user@googlegroups.com. Visit this group at http://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout.
[akka-user] Unpersist a processor
Hi, Is it possible to remove a processor from the journal, so its id can be reused as a fresh processor later? Thanks Heiko -- Read the docs: http://akka.io/docs/ Check the FAQ: http://doc.akka.io/docs/akka/current/additional/faq.html Search the archives: https://groups.google.com/group/akka-user --- You received this message because you are subscribed to the Google Groups Akka User List group. To unsubscribe from this group and stop receiving emails from it, send an email to akka-user+unsubscr...@googlegroups.com. To post to this group, send email to akka-user@googlegroups.com. Visit this group at http://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout.
Re: [akka-user] Unpersist a processor
Hello Heiko, This can be achieved but at expense of having to delete all messages stored in the journal for a given processor id. This can be done from within the Processor by calling deleteMessages(toSequenceNr = Long.MaxValue, permanent: Boolean = …), where permanent deletion is optional - soft deleted messages won't be replayed anyway, so it will seam as-if it's a fresh Processor. Hope this helps to answer the general question :-) If it's more of a real-world-app question, let's maybe check out an example scenario, because in general it feels a bit weird to re-use these ids (at least to me), as it might complicate reasoning about the system's state at some point in time… -- Konrad Malawski geecon.org / java.pl / krakowscala.pl / gdgkrakow.pl From: Heiko Seeberger heiko.seeber...@gmail.com Reply: akka-user@googlegroups.com akka-user@googlegroups.com Date: 23 March 2014 at 12:21:38 To: akka-user@googlegroups.com akka-user@googlegroups.com Subject: [akka-user] Unpersist a processor Hi, Is it possible to remove a processor from the journal, so its id can be reused as a fresh processor later? Thanks Heiko -- Read the docs: http://akka.io/docs/ Check the FAQ: http://doc.akka.io/docs/akka/current/additional/faq.html Search the archives: https://groups.google.com/group/akka-user --- You received this message because you are subscribed to the Google Groups Akka User List group. To unsubscribe from this group and stop receiving emails from it, send an email to akka-user+unsubscr...@googlegroups.com. To post to this group, send email to akka-user@googlegroups.com. Visit this group at http://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout. -- Read the docs: http://akka.io/docs/ Check the FAQ: http://doc.akka.io/docs/akka/current/additional/faq.html Search the archives: https://groups.google.com/group/akka-user --- You received this message because you are subscribed to the Google Groups Akka User List group. To unsubscribe from this group and stop receiving emails from it, send an email to akka-user+unsubscr...@googlegroups.com. To post to this group, send email to akka-user@googlegroups.com. Visit this group at http://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout.
