com.atlassian.confluence.upgrade.upgradetask
Class DropContentLockTableUpgradeTask

java.lang.Object
  com.atlassian.confluence.upgrade.AbstractUpgradeTask
      com.atlassian.confluence.upgrade.upgradetask.DropContentLockTableUpgradeTask

All Implemented Interfaces:

BackupSupport, DatabaseUpgradeTask, UpgradeTask

public class DropContentLockTableUpgradeTask
extends AbstractUpgradeTask
implements DatabaseUpgradeTask

The CONTENTLOCK table was finally removed in Confluence 4.2, and needs to be dropped lest its hanging foreign key constraint cause issues.

Constructor Summary

DropContentLockTableUpgradeTask(DdlExecutor ddlExecutor)

Method Summary

boolean	breaksBackwardCompatibility() Returns true if a new export can't be imported in an older instance.
void	doUpgrade() Perform the upgrade.
java.lang.String	getBuildNumber()
java.lang.String	getShortDescription() A short (<50 chars) description of the upgrade action
boolean	runOnSpaceImport() Returns true if an older Space can't be imported in a new instance without running this task.

Methods inherited from class com.atlassian.confluence.upgrade.AbstractUpgradeTask

addAllErrors, addError, addError, getConstraint, getErrors, setBuildNumber, validate

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.atlassian.confluence.upgrade.UpgradeTask

getConstraint, getErrors, validate

Constructor Detail

DropContentLockTableUpgradeTask

public DropContentLockTableUpgradeTask(DdlExecutor ddlExecutor)

Method Detail

getBuildNumber

public java.lang.String getBuildNumber()

Specified by:

getBuildNumber in interface UpgradeTask

Overrides:

getBuildNumber in class AbstractUpgradeTask

Returns:

The build number that this upgrade is applicable to

getShortDescription

public java.lang.String getShortDescription()

Description copied from interface: UpgradeTask

A short (<50 chars) description of the upgrade action

Specified by:

getShortDescription in interface UpgradeTask

Overrides:

getShortDescription in class AbstractUpgradeTask

doUpgrade

public void doUpgrade()
               throws java.lang.Exception

Description copied from interface: UpgradeTask

Perform the upgrade.

Specified by:

doUpgrade in interface UpgradeTask

Throws:

java.lang.Exception

runOnSpaceImport

public boolean runOnSpaceImport()

Description copied from interface: BackupSupport

Returns true if an older Space can't be imported in a new instance without running this task. For example:

• A task updating macro names in the BodyContent table would be blocking.
• Tasks which updates data related to the space would be blocking.
• A task upgrading the user table wouldn't be blocking.
• Adding a mandatory column on space-related content breaks space import

Note that tasks don't run on space import yet, so we just reject the import in this case.

Specified by:

runOnSpaceImport in interface BackupSupport

breaksBackwardCompatibility

public boolean breaksBackwardCompatibility()

Description copied from interface: BackupSupport

Returns true if a new export can't be imported in an older instance. Breaking compatibility means a snapshot of the new version will not work at all with the previous version. For example:

• A destructive operation (Some data is replaced by another) breaks backwards compatibility
• Adding a optional column does NOT break backwards compatibility
• Data is copied to another column doesn't breaks backwards compatibility
• A build number incrementation doesn't breaks backwards compatibility

The best way to test is whether a newer export can be imported (with fully working features) in an older instance.

Specified by:

breaksBackwardCompatibility in interface BackupSupport