This web2all/lock package requires the web2all/framework (https://github.com/web2all/framework). It used to be proprietary software but now it has been released to the public domain under a MIT license.
This pacckage is no longer actively maintained. Most likely it is only of interest if you own software created by Web2All B.V. which was built using these classes.
Implement simple advisory locking. Currently only implements this using a mysql database which must be shared between the applications which want to use the advisory locking. Internally it uses the mysql functions GET_LOCK and RELEASE_LOCK. This makes it very easy to implement advisory locking between programs using the same database server. Prevent your processes from running in parallel.
Web2All framework is open-sourced software licensed under the MIT license (https://opensource.org/licenses/MIT).