Hi/lo algorithm in Hibernate
By: Dorris in Hibernate Tutorials on 2011-01-01
The hilo and seqhilo generators provide two alternate implementations of the hi/lo algorithm. The first implementation requires a "special" database table to hold the next available "hi" value. Where supported, the second uses an Oracle-style sequence.
<id name="id" type="long" column="cat_id"> <generator class="hilo"> <param name="table">hi_value</param> <param name="column">next_value</param> <param name="max_lo">100</param> </generator> </id>
<id name="id" type="long" column="cat_id"> <generator class="seqhilo"> <param name="sequence">hi_value</param> <param name="max_lo">100</param> </generator> </id>
Unfortunately, you cannot use hilo when supplying your own Connection to Hibernate. When Hibernate uses an application server datasource to obtain connections enlisted with JTA, you must configure the hibernate.transaction.manager_lookup_class.
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