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

Class MergeToSmallestIdDedupeStrategy

java.lang.Object

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

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

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

All Implemented Interfaces:

DedupeStrategy

public class MergeToSmallestIdDedupeStrategy
extends KeepSmallestIdDedupeStrategy

2 steps: 1. Move all child records from referencing others to referencing the record with smallest Id 2. Delete others

Since:

7.1.0

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	MergeToSmallestIdDedupeStrategy.ReferencedTable	Hold information about a table having a foreign key referencing current table This implementation only support simple foreign keys i.e.

Constructor Summary

Constructors

Constructor	Description
MergeToSmallestIdDedupeStrategy(String table, String idColumn, Collection<MergeToSmallestIdDedupeStrategy.ReferencedTable> referencedTables)

Method Summary

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

Methods inherited from class com.atlassian.confluence.internal.upgrade.constraint.dedup.KeepSmallestIdDedupeStrategy

getIdToKeep

Methods inherited from class java.lang.Object

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

Constructor Detail

MergeToSmallestIdDedupeStrategy

public MergeToSmallestIdDedupeStrategy(String table,
                                       String idColumn,
                                       Collection<MergeToSmallestIdDedupeStrategy.ReferencedTable> referencedTables)

Method Detail

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

Overrides:

perform in class KeepOneDedupeStrategy

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