[YANGTOOLS-1496] Add Runnable-backed Registration implementations

Thu, 18 Jan 2024 10:42:39 +0000

Registration is a simple interface, which is quite easy to get wrong due to simple lamdas not being idempotent:

Registration reg = () -> {
        // not idempotent!
    };

reg.close() // executes the block
reg.close() // also executes the block!

Current way of doing this is quite verbose:

var reg = AbstractRegistration() {
    @Override
    protected void removeRegistration() {
        // idempotent
    }
};

reg.close() // executes the block
reg.close() // does nothing

Add Registration.of(Runnable) utility method which wraps a callback and executes it just once, backed by AbstractRegistration logic. This allows users to use lambdas (and method references) and wrap them with a guard:

var reg = Registration.of(() -> {
        // idempotent
    });

reg.close() // executes the block
reg.close() // does nothing

The same patterns applies to ObjectRegistration and ListenerRegistration.

OpenDaylight JIRA

[YANGTOOLS-1496] Add Runnable-backed Registration implementations