Re: [basex-talk] Strategies for "checkout" or explicit file locking

Dear Alister,

I wonder what strategies other people use to lock a file for “editing”, or “checkout” a file so that only a single user has access (in a multi-user environment).

We usually apply the XQuery locking options [1]: From all XQuery expressions that reference the same lock string, only one writing process will be run one at the same time. This can e. g. look as follows:

read.xq: declare option query:read-lock "config"; file:read-text("config.xml")

write.xq: declare option query:write-lock "config"; file:write-text("config.xml", 'blablabla')

Hope this helps, Christian

[1] http://docs.basex.org/wiki/Transaction_Management#XQuery_Locking_Options