Pardon my ignorance, but what is a HiLo key generator? Many years ago, we
used an incrementing number, but reversed the bits, so that the keys were
well distributed. Is this the same thing? Should I have patented the idea
:-) ? Too late I suppose!
Ciao,
Jonathan O'Connor
Development Manager
XCOM Dublin
Phone: +353 1 872 3305
Mobile: +353 86 824 0736
Alex Loubyansky <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED]
05.03.2003 19:36
Please respond to jboss-user
To: JBoss-User <[EMAIL PROTECTED]>
cc:
Subject: [JBoss-user] HiLo key generator
I just added HiLo key generator to HEAD.
Now, using entity-command configuration, it's possible to create
entities with either "known" or unknown primary keys using UUID or
HiLo key generators.
Key generator is deployed with *-service.xml. Here is an excerpt from
hilo-service.xml:
<!--
| HiLoKeyGeneratorFactory
-->
<mbean
code="org.jboss.ejb.plugins.keygenerator.hilo.HiLoKeyGeneratorFactory"
name="jboss:service=KeyGeneratorFactory,type=HiLo">
<attribute
name="FactoryName">java:/HiLoKeyGeneratorFactory</attribute>
<attribute name="DataSource">java:/DefaultDS</attribute>
<attribute
name="TransactionManager">java:/TransactionManager</attribute>
<attribute name="TableName">JBOSS_SEQUENCE</attribute>
<attribute name="ColumnName">ID</attribute>
<attribute name="ColumnSQLType">INTEGER</attribute>
<attribute name="BlockSize">100</attribute>
</mbean>
If the table does not exist at deployment, it is created.
Is there a need to backport it to 3.2 and/or 3.0 versions?
Thanks,
alex
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