wt.fc
Class RequiredBlobMigrator

java.lang.Object
  wt.fc.RequiredBlobMigrator

All Implemented Interfaces:

JavaMigrator

public class RequiredBlobMigrator

extends Object

implements JavaMigrator

This class implements a migrator to check Required BLOB columns to ensure that the column does not contain a valid BLOB with zero length.

Field Summary

private static String	JDBC_DRIVER
private static String	JDBC_URL_PREFIX
private static boolean	VERBOSE

Constructor Summary

RequiredBlobMigrator()

Method Summary

private static long	getEmptyBlobCount(ClassInfo a_classInfo, Connection a_connection)
static void	main(String[] args)
private static void	processPersistables(Connection a_connection)
boolean	runMigration(DirectiveServices directive_services) Run the migration.

Methods inherited from class java.lang.Object

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

Field Detail

VERBOSE

private static boolean VERBOSE

JDBC_DRIVER

private static final String JDBC_DRIVER

See Also:

Constant Field Values

JDBC_URL_PREFIX

private static final String JDBC_URL_PREFIX

See Also:

Constant Field Values

Constructor Detail

RequiredBlobMigrator

public RequiredBlobMigrator()

Method Detail

runMigration

public boolean runMigration(DirectiveServices directive_services)
                     throws Throwable

Run the migration.

Migrators should log all output to the given PrintWriter. This is the log that is created by RunMigrators. It is an autoflush writer.

Migrators should return true if they successfully completed migration and false otherwise. It is the migrator's responsibility to log failure reasons to the log.

Migrators should not concern themselves with committing the work on the connection. The MigratorRunner will commit the connection work after running each Migrator.

Specified by:

runMigration in interface JavaMigrator

Parameters:

directive_services - provide access to database, logging, and versioning information

Throws:

Throwable - declared so that migrators can let exceptions contibuting to failure pass out of the method. The migrator runner will handle these by logging them.

main

public static void main(String[] args)

processPersistables

private static void processPersistables(Connection a_connection)
                                 throws WTException,
                                        SQLException,
                                        IOException

Throws:

WTException

SQLException

IOException

getEmptyBlobCount

private static long getEmptyBlobCount(ClassInfo a_classInfo,
                                      Connection a_connection)
                               throws WTException,
                                      SQLException

Throws:

WTException

SQLException