Package com.atlassian.confluence.internal.upgrade.constraint.dedup

Class KeepOneDedupeStrategy

java.lang.Object

com.atlassian.confluence.internal.upgrade.constraint.dedup.KeepOneDedupeStrategy

All Implemented Interfaces:

DedupeStrategy

Direct Known Subclasses:

KeepBiggestIdDedupeStrategy, KeepSmallestIdDedupeStrategy

public abstract class KeepOneDedupeStrategy
extends Object
implements DedupeStrategy

Keep only one record. Delete the rest.

Since:

7.1.0

Method Summary

Modifier and Type	Method	Description
protected abstract Object	getIdToKeep(SortedSet<Object> ids)
void	perform(org.springframework.jdbc.core.JdbcTemplate jdbcTemplate, SortedSet<Object> ids)	Remove duplicates so a unique constraint can be added

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

perform

public void perform(org.springframework.jdbc.core.JdbcTemplate jdbcTemplate,
 SortedSet<Object> ids)
             throws UpgradeException

Description copied from interface: DedupeStrategy

Remove duplicates so a unique constraint can be added

Specified by:

perform in interface DedupeStrategy

Parameters:

jdbcTemplate - A JdbcTemplate to be used

ids - Set of Ids of duplicate rows in DB. Upon invocation of this method, only one of them can remain in the DB. All Confluence primary keys are of type Long or String so they can be used in SortedSet.

Throws:

UpgradeException - Thrown if there is any error removing duplicates, will cancel the constraint adding process

getIdToKeep

protected abstract Object getIdToKeep(SortedSet<Object> ids)