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Session: Deleting entities
Entities can be marked for deletion by using
delete method, but will not be removed from server until
saveChanges is called.
public <T> void delete(T entity); public <T> void delete(Class<T> clazz, Number id); public <T> void delete(Class<T> clazz, UUID id); public void delete(String id);
|entity or id||T, number, UUID or string||instance of entity to delete or entity Id|
// if UseOptimisticConcurrency is set to 'true' (default 'false') // this 'delete' method will use loaded 'employees/1' etag for concurrency check // and might throw ConcurrencyException Employee employee = session.load(Employee.class, "employees/1"); session.delete(employee); session.saveChanges();
// this 'Delete' method will not do any Etag-based concurrency checks // because Etag for 'employees/1' is unknown session.delete("employees/1"); session.saveChanges();
If entity is not tracked by session, then executing
is equal to doing
session.advanced().defer(new DeleteCommandData("employees/1", null));
You can read more about defer operations here.