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Concurrency Control

There may be cases where more than one user attempts to update a configuration. To manage concurrent access, configurations have a date last modified (date_modified) timestamp field which is updated whenever the object is written to. When a configuration is accessed for reading or writing, the date_modified field currently associated with the object is queried. When you attempt to update the object, the date_modified held locally is compared with the date_ modified of the stored object. If the date_modified of the object is more recent than the local copy, you will not be able to modify the object and you will receive a message asking you to open it and save it again, or save a new copy. By saving the configuration as a new configuration, you can still save your work.

Only the user who initially created the configuration has permission to delete that configuration. If you delete the configuration while someone else has it open for reading, the other user will not be allowed to save changes and will be notified that the user who created this configuration has deleted it and it is no longer valid. The user can then save a new copy to save his or her work.

 Siebel Interactive Selling Transact Server Interface Reference 
 Published: 18 April 2003