It's not possible to lock a mongodb document. What if I need to?

Question

I know that I can\'t lock a single mongodb document, in fact there is no way to lock a collection either.

However, I\'ve got this scenario, where I think I need some

Answer 1

If you have a system with > 1 servers then you'll need a distributive lock.

I prefer to use Hazelcast.

While saving you can get Hazelcast lock by entity id, fetch and update data, then release a lock.

As an example: https://github.com/azee/template-api/blob/master/template-rest/src/main/java/com/mycompany/template/scheduler/SchedulerJob.java

Just use lock.lock() instead of lock.tryLock()

Here you can see how to configure Hazelcast in your spring context:

https://github.com/azee/template-api/blob/master/template-rest/src/main/resources/webContext.xml