Attachment 3690 Details for Bug 24214

Zu migrierende Dokumentation

locked_en.tex (text/x-tex), 1.98 KB, created by Moritz Muehlenhoff on 2011-10-26 16:35 CEST

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Creator: Moritz Muehlenhoff

Created: 2011-10-26 16:35 CEST

Size: 1.98 KB

patch

obsolete

>\subsubsection{Locked values}
>The data contained in the \ucsName{temporary} container are created
>and used on a program-internal basis exclusively.
>
>The values of some of the attributes have to be unique. If a certain
>value is to be set, a search within the LDAP directory will be
>performed beforehand in order to check whether the value is already in
>use.
>
>Values presently edited - and therefore not accessible for search -
>are locked during editing in order to ensure that these values are not
>used a second time. Such values are reserved for the editing process
>and cannot be utilised by any other process. Once editing is finished,
>the lock is lifted.
>
>In case of an error, a lock can sometimes persist by accident. To
>ensure an error-free operation, \ucsUDM{} automatically releases
>locked values after a maximum locking time (five minutes).
>
>Locked  values are stored in the appropriate containers beneath the
>\ucsName{temporary} container, and are checked and, eventually, deleted in
>\ucsUDM{} like any other objects. Manual deleting is not recommended
>except in special cases:
>
>\begin{itemize}
>\item If, due to an error, the lock was not lifted, and the value is to be
>used again before the locking time is expired. In such a case, it has
>to be ensured that the persistence of the lock is indeed due to an
>error, and not just to the fact that another process has made access
>to the value in the meantime.
>
>\item The lock was lifted, yet the locked object was not automatically
>removed from
>\ucsName{cn=<subcontainer>,cn=temporary,cn=univention,<Base-DN>}. Such
>objects do not disturb the program flow, they will be overwritten by
>\ucsUDM{} as soon as the necessity arises.
>\end{itemize}
>
>\begin{ucsTabbox}{'General' tab}
>\ucsTabentry{Name (*)}
>The name of the locked object. The name corresponds to the value to be
>set as the attribute.
>
>\ucsTabentry{Locked until}
>The time (in seconds), from 1 January 1970 onwards, when the object is
>automatically released after the expiry of the maximum locking time.
>\end{ucsTabbox}
>

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