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/* |
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* Copyright 2014, Armenak Grigoryan, and individual contributors as indicated |
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* by the @authors tag. See the copyright.txt in the distribution for a |
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* full listing of individual contributors. |
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* |
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* This is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU Lesser General Public License as |
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* published by the Free Software Foundation; either version 2.1 of |
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* the License, or (at your option) any later version. |
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* |
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* This software is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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*/ |
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package com.strider.datadefender.database; |
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import java.lang.reflect.InvocationTargetException; |
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import java.sql.Connection; |
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import java.sql.SQLException; |
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import com.strider.datadefender.DataDefenderException; |
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import com.strider.datadefender.DbConfig; |
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import com.strider.datadefender.DbConfig.Vendor; |
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import com.strider.datadefender.database.metadata.IMetaData; |
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import com.strider.datadefender.database.metadata.MetaData; |
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import com.strider.datadefender.database.metadata.MySqlMetaData; |
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import com.strider.datadefender.database.sqlbuilder.ISqlBuilder; |
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import com.strider.datadefender.database.sqlbuilder.SqlBuilder; |
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import com.strider.datadefender.database.sqlbuilder.MsSqlBuilder; |
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import com.strider.datadefender.database.sqlbuilder.OracleSqlBuilder; |
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import com.strider.datadefender.utils.ICloseableNoException; |
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import lombok.extern.log4j.Log4j2; |
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/** |
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* Aggregate all the various db factories. |
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* |
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* Will handle the 'pooling' of connections (currently only one). |
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* |
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* All clients should close the connection by calling the close() method of the |
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* AutoCloseable interface. |
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* |
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* @author Akira Matsuo |
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*/ |
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public interface IDbFactory extends ICloseableNoException { |
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ISqlBuilder createSQLBuilder() throws DataDefenderException; |
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IMetaData fetchMetaData() throws DataDefenderException; |
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Connection getConnection(); |
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Connection getUpdateConnection(); |
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String getVendorName(); |
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/** |
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* Implements the common logic of getting/closing database connections |
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*/ |
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@Log4j2 |
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static abstract class DbFactory implements IDbFactory { |
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private final Connection connection; |
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protected Connection updateConnection; |
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private final Vendor vendor; |
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DbFactory(Vendor vendorName) throws DataDefenderException { |
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1 |
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log.info("Connecting to database"); |
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1 |
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connection = createConnection(); |
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updateConnection = connection; |
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vendor = vendorName; |
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} |
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@Override |
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public void close() { |
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if (connection != null) { |
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try { |
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connection.close(); |
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} catch (SQLException e) { |
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log.error(e.getMessage(), e); |
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} |
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} |
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if (updateConnection != null && updateConnection != connection) { |
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try { |
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updateConnection.close(); |
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} catch (SQLException e) { |
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log.error(e.getMessage(), e); |
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} |
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} |
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} |
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public abstract Connection createConnection() throws DataDefenderException; |
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@Override |
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public Connection getConnection() { |
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return connection; |
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} |
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@Override |
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public Connection getUpdateConnection() { |
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return updateConnection; |
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} |
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@Override |
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public String getVendorName() { |
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return vendor.name(); |
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} |
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} |
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/** |
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* Generic method handling creation of a DBFactory anonymous instance for |
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* supported database vendors. |
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* |
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* @param <D> |
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* @param <M> |
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* @param <S> |
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* @param config |
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* @param connection |
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* @param metaData |
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* @param builder |
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* @return |
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* @throws DataDefenderException |
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*/ |
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private static <D extends IDbConnection, M extends IMetaData, S extends ISqlBuilder> DbFactory getFactoryWith( |
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final DbConfig config, |
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Class<D> connection, |
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Class<M> metaData, |
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Class<S> builder |
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) throws DataDefenderException { |
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return new DbFactory(config.getVendor()) { |
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@Override |
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public Connection createConnection() throws DataDefenderException { |
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try { |
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return connection.getConstructor(DbConfig.class).newInstance(config).connect(); |
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} catch (NoSuchMethodException|InstantiationException|IllegalAccessException|InvocationTargetException e) { |
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throw new DataDefenderException("", e); |
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} |
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} |
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@Override |
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public IMetaData fetchMetaData() throws DataDefenderException { |
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try { |
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return metaData.getConstructor(DbConfig.class, Connection.class).newInstance(config, getConnection()); |
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} catch (NoSuchMethodException|InstantiationException|IllegalAccessException|InvocationTargetException e) { |
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throw new DataDefenderException("", e); |
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} |
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} |
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@Override |
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public ISqlBuilder createSQLBuilder() throws DataDefenderException { |
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try { |
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return builder.getConstructor(DbConfig.class).newInstance(config); |
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} catch (NoSuchMethodException|InstantiationException|IllegalAccessException|InvocationTargetException e) { |
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throw new DataDefenderException("", e); |
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} |
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} |
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}; |
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} |
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/** |
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* Creates and returns an IDBFactory instance for the given rdbms. |
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* |
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* @param config |
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* @return db factory instance |
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* @throws DatabaseAnonymizerException |
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*/ |
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public static IDbFactory get(final DbConfig config) throws DataDefenderException { |
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if (config.getVendor() == Vendor.MYSQL || config.getVendor() == Vendor.H2) { |
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DbFactory factory = getFactoryWith(config, DbConnection.class, MySqlMetaData.class, SqlBuilder.class); |
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// create separate connection for updates |
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factory.updateConnection = factory.createConnection(); |
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return factory; |
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} else if (config.getVendor() == Vendor.SQLSERVER) { |
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return getFactoryWith(config, MsSqlDbConnection.class, MetaData.class, MsSqlBuilder.class); |
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} else if (config.getVendor() == Vendor.ORACLE) { |
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return getFactoryWith(config, DbConnection.class, MetaData.class, OracleSqlBuilder.class); |
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} else if (config.getVendor() == Vendor.POSTGRESQL) { |
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return getFactoryWith(config, DbConnection.class, MetaData.class, SqlBuilder.class); |
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} |
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throw new IllegalArgumentException("Database " + config.getVendor() + " is not supported"); |
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} |
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} |
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|
armenak /
DataDefender
