/**
* JBoss, Home of Professional Open Source
* Copyright Red Hat, Inc., and individual contributors.
*
* 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 org.jboss.aerogear.unifiedpush.migrator;
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 java.sql.*;
import java.util.ArrayList;
import java.util.List;
public class CategoriesMigration implements CustomTaskChange {
private String confirmationMessage;
@Override
public String getConfirmationMessage() {
return this.confirmationMessage;
}
@Override
public void setUp() throws SetupException {
}
@Override
public void setFileOpener(ResourceAccessor resourceAccessor) {
}
@Override
public ValidationErrors validate(Database database) {
return null;
}
@Override
public void execute(Database database) throws CustomChangeException {
try {
Connection conn = ((JdbcConnection) (database.getConnection())).getWrappedConnection();
DatabaseMetaData metaData = conn.getMetaData();
ResultSet tables = metaData.getTables(null, null, null, null);
boolean hasTable = false;
while (tables.next()) {
String tableName = tables.getString(3);
if ("Installation_categories".equals(tableName) || "installation_categories".equals(tableName)) {
hasTable = true;
}
}
if (!hasTable) {
this.confirmationMessage = "table doesn't exists, skipping";
return;
}
ResultSet rs = conn.createStatement().executeQuery("select distinct categories from Installation_categories");
List<String> categories = new ArrayList<>();
while (rs.next()) {
String category = rs.getString(1);
categories.add(category);
}
rs.close();
conn.setAutoCommit(false);
PreparedStatement categoriesStatement = conn.prepareStatement("insert into category (id, name) values (?, ?)");
long categoryCounter = 1;
for (String category : categories) {
categoriesStatement.setLong(1, categoryCounter);
categoriesStatement.setString(2, category);
categoriesStatement.executeUpdate();
categoryCounter++;
}
categoriesStatement.close();
if ("mysql".equals(database.getShortName())) {
PreparedStatement sequenceStatement = conn.prepareStatement("update category_seq set next_val = ? where next_val = ?");
sequenceStatement.setLong(1, categoryCounter + 1);
sequenceStatement.setLong(2, categoryCounter);
sequenceStatement.executeUpdate();
sequenceStatement.close();
} else if ("postgresql".equals(database.getShortName())) {
Statement statement = conn.createStatement();
statement.executeUpdate("alter sequence category_seq restart with " + categoryCounter + 1);
statement.close();
}
conn.commit();
this.confirmationMessage = categoryCounter + " categories migrated successfully";
} catch (Exception e) {
throw new CustomChangeException(e);
}
}
}