Locking of objects between service calls

Hello,
Is there any practial way to lock an object (for example a loan) with one service so that it stays locked until another service commits the transaction and releases the lock? The service is a RFC function module that will be called by a web application. My problem is that when I use the standard ENQUEUE function the lock dissappears as soon as the first service is finished.
Also, if one service would create a lock of an object and another one starts the update task, they probably wouldn't be in the same LUW, would that be a problem? If so, is there a solution?
Thank you and kind regards,
Steffen

Steffen:
In the locking service use the _SCOPE parameter value of 3 in your enqueue function call. This retains the lock after the first service (locking process) ends. The second service that does the update can then dequeue the lock after the update is processed.
No problem with setting & freeing locks in different LUW, as the SAP locking mechanism is co-operative (i.e. software controlled) rather than database controlled. Just make sure that you use a standard SAP enqueue function so that other unrelated processes will honor the lock set by your first service.
Regards,
D.

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It is a legal requirement in Brazil that service calls are numbered.
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Other terms
service calls, series, numbering, B1, sequential
Header Data
Released on     15.08.2011 15:48:33
Release status     Released for Customer
Component     SBO-SER-SCL Service Call
Priority     Recommendations/additional info
Category     Advance development
References
This document is referenced by:
SAP Business One Notes
1606253           Overview Note for SAP Business One 8.81 patch 07
Validity
Software Component
Version
SAP BUSINESS ONE
8.81
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