com.tacitknowledge.util.migration.jdbc.DistributedMigrationTableUnlock Maven / Gradle / Ivy
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An automated Java patching system
/* Copyright 2004 Tacit Knowledge
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.tacitknowledge.util.migration.jdbc;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.tacitknowledge.util.migration.MigrationContext;
/**
* Allows you to force-unlock a migration table with an orphaned lock. Should
* be used in the same way that DistributedMigrationInformation is used
*
* @author Mike Hardy ([email protected])
* @see com.tacitknowledge.util.migration.jdbc.DistributedMigrationInformation
*/
public class DistributedMigrationTableUnlock
{
/** Class logger */
private static Log log = LogFactory.getLog(DistributedMigrationTableUnlock.class);
/**
* Get the migration level information for the given system name
*
* @param arguments the command line arguments, if any (none are used)
* @exception Exception if anything goes wrong
*/
public static void main(String[] arguments) throws Exception
{
DistributedMigrationTableUnlock unlock = new DistributedMigrationTableUnlock();
String migrationName = System.getProperty("migration.systemname");
if (migrationName == null)
{
if ((arguments != null) && (arguments.length > 0))
{
migrationName = arguments[0].trim();
}
else
{
throw new IllegalArgumentException("The migration.systemname "
+ "system property is required");
}
}
unlock.tableUnlock(migrationName);
}
/**
* unlock the patch table for the given system name
*
* @param systemName the name of the system
* @throws Exception if anything goes wrong
*/
public void tableUnlock(String systemName) throws Exception
{
tableUnlock(systemName, MigrationContext.MIGRATION_CONFIG_FILE);
}
/**
* unlock the patch table for the given system name
*
* @param systemName the name of the system
* @param migrationSettings migration settings file
* @throws Exception if anything goes wrong
*/
public void tableUnlock(String systemName, String migrationSettings) throws Exception
{
// The MigrationLauncher is responsible for handling the interaction
// between the PatchTable and the underlying MigrationTasks; as each
// task is executed, the patch level is incremented, etc.
try
{
DistributedJdbcMigrationLauncherFactory factory =
new DistributedJdbcMigrationLauncherFactory();
DistributedJdbcMigrationLauncher launcher
= (DistributedJdbcMigrationLauncher) factory.createMigrationLauncher(systemName, migrationSettings);
Map contextMap = launcher.getContexts();
JdbcMigrationContext context =
(JdbcMigrationContext) contextMap.keySet().iterator().next();
launcher.createPatchStore(context).unlockPatchStore();
}
catch (Exception e)
{
log.error(e);
throw e;
}
}
}