[OSM-dev] Auto closing of changesets in API 0.6

80n 80n80n at gmail.com
Fri Oct 3 16:23:49 BST 2008


On Fri, Oct 3, 2008 at 3:54 PM, Frederik Ramm <frederik at remote.org> wrote:

> (forgot to reply to list)
>
> Hi,
>
> Shaun McDonald wrote:
> > Should changesets automatically be closed after a period of time? If so
> > how long?
>

Why does a changeset need to even have an open/closed state?  Its just a
unique identifier for a set of changes.


>
> I thought that when a changeset is created and whenever something is
> added, the expiration date is set to "now + 30 minutes". A changeset
> whose expiration date is in the past is considered closed. That would
> have the advantage of not having to run a cleanup job.
>
> (On second reading, I thing the idea was a little bit cleverer: If you
> add something to a changeset *and* the expiration date is within the
> next 30 minutes, add 60 minutes. This would mean less updates to the
> changeset table.)
>
> > Are changesets useful if they are never closed, or empty?
>
> With that logic, a never-closed changeset would not happen (unless
> someone tries really hard!). An empty changeset is useless I believe.
>
> > Should there be a way for an application to be able to query and check
> > to see if it has an open changeset to use, thus preventing open
> changesets?
>
> It would be good style for an application to remember any changesets it
> has opened and try to re-use them; however if it crashes and loses track
> of a changeset that would not hurt since the changeset would
> automatically "expire".
>
> Bye
> Frederik
>
> --
> Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00'09" E008°23'33"
>
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