In Hibernate what all is required to make an entity read-only?

Issue

I want to set an ORM to read-only. I'm using the two annotations below on each persistent class. Is this sufficient and is there anything else that must be set?
```
@org.hibernate.annotations.Entity(mutable=false)
@org.hibernate.annotations.Cache(usage = CacheConcurrencyStrategy.READ_ONLY)
```

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