Hibernate ORM - insert row only if one doesn't already exist

[split comet]

<@&987246584574140416> please have a look, thanks.

[keen vortex]

select for update

if a row is present, you immediately lock it

[fickle python]

Maybe you can use a @Column(unique=True) or something like that on the user field of your UserSession class?

[split comet]

@thick reef

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[keen vortex]

that won't do anything

[fickle python]

Why? It should create a contraint on the database and so 2 persist will throw something

[keen vortex]

because it is still not atomic
the exception that you get will be immediately outdated