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Upgrade Process Customization
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If you're looking for the release numbers and wondering how the upgrade classes are run, this is the place.
In portal.properties, there a section called Upgrade:
##
## Upgrade
##
#
# Input a list of comma delimited class names that implement
# com.liferay.portal.upgrade.UpgradeProcess. These classes will run on
# startup to upgrade older data to match with the latest version.
#
upgrade.processes=com.liferay.portal.upgrade.UpgradeProcess_**XYZ**This contains a list of classes that will be run by StartupAction.
These classes all extend the abstract class UpgradeProcess.
Within these classes, they are assigned a release build number in the getThreshold() method.
StartupAction compares this number against a number stored in the database.
This number is stored in the buildNumber column of the Release_ table.
If the stored number in the database is less than the number in the class, than the upgrade will run.
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