/* * Data Hub Service (DHuS) - For Space data distribution. * Copyright (C) 2013,2014,2015 GAEL Systems * * This file is part of DHuS software sources. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package fr.gael.dhus.database.liquibase; import java.sql.PreparedStatement; import java.sql.ResultSet; import liquibase.change.custom.CustomTaskChange; import liquibase.database.Database; import liquibase.database.jvm.JdbcConnection; import liquibase.exception.CustomChangeException; import liquibase.exception.SetupException; import liquibase.exception.ValidationErrors; import liquibase.resource.ResourceAccessor; import org.apache.logging.log4j.LogManager; import org.apache.logging.log4j.Logger; public class RemoveLFUStrategy implements CustomTaskChange { private static final Logger LOGGER = LogManager.getLogger(RemoveLFUStrategy.class); @Override public String getConfirmationMessage () { return null; } @Override public void setFileOpener (ResourceAccessor resource_accessor) { } @Override public void setUp () throws SetupException { } @Override public ValidationErrors validate (Database arg0) { return null; } @Override public void execute (Database database) throws CustomChangeException { JdbcConnection databaseConnection = (JdbcConnection) database.getConnection (); try { PreparedStatement getEvictions = databaseConnection .prepareStatement ("SELECT ID,STRATEGY FROM EVICTION"); ResultSet res = getEvictions.executeQuery (); while (res.next ()) { Integer strategy = (Integer) res.getObject ("STRATEGY"); if (strategy == 2) { // 2 (old LFU) -> 0 (None) strategy = 0; } if (strategy == 3) { // 3 (old FIFO) -> 2 (new FIFO) strategy = 2; } PreparedStatement updateStrategy = databaseConnection .prepareStatement ("UPDATE EVICTION SET STRATEGY = '" + strategy+"' WHERE ID = "+res.getObject ("ID")); updateStrategy.execute (); updateStrategy.close (); } getEvictions.close (); } catch (Exception e) { LOGGER.error("Error during liquibase update 'removeLFUStrategy'", e); } } }