Pahansith Gunathilake
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35e0b9189e
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/*
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* Copyright (c) 2022, Entgra (Pvt) Ltd. (http://www.entgra.io) All Rights Reserved.
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*
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* Entgra (Pvt) Ltd. licenses this file to you under the Apache License,
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* Version 2.0 (the "License"); you may not use this file except
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* in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package org.wso2.carbon.device.mgt.core.dao;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.wso2.carbon.device.mgt.common.DeviceManagementConstants;
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import org.wso2.carbon.device.mgt.common.exceptions.IllegalTransactionStateException;
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import org.wso2.carbon.device.mgt.common.exceptions.TransactionManagementException;
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import org.wso2.carbon.device.mgt.common.exceptions.UnsupportedDatabaseEngineException;
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import org.wso2.carbon.device.mgt.core.config.datasource.DataSourceConfig;
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import org.wso2.carbon.device.mgt.core.config.datasource.JNDILookupDefinition;
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import org.wso2.carbon.device.mgt.core.dao.impl.*;
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import org.wso2.carbon.device.mgt.core.dao.impl.event.GenericEventConfigDAOImpl;
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import org.wso2.carbon.device.mgt.core.dao.impl.event.H2EventConfigDAOImpl;
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import org.wso2.carbon.device.mgt.core.dao.util.DeviceManagementDAOUtil;
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import javax.sql.DataSource;
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import java.sql.Connection;
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import java.sql.SQLException;
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import java.util.Hashtable;
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import java.util.List;
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public class EventManagementDAOFactory {
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private static DataSource dataSource;
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private static String databaseEngine;
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private static final Log log = LogFactory.getLog(EventManagementDAOFactory.class);
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private static ThreadLocal<Connection> currentConnection = new ThreadLocal<>();
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public static GeofenceDAO getGeofenceDAO() {
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return new GeofenceDAOImpl();
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}
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public static EventConfigDAO getEventConfigDAO() {
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if (databaseEngine != null) {
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switch (databaseEngine) {
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case DeviceManagementConstants.DataBaseTypes.DB_TYPE_POSTGRESQL:
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case DeviceManagementConstants.DataBaseTypes.DB_TYPE_ORACLE:
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case DeviceManagementConstants.DataBaseTypes.DB_TYPE_MSSQL:
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case DeviceManagementConstants.DataBaseTypes.DB_TYPE_MYSQL:
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return new GenericEventConfigDAOImpl();
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case DeviceManagementConstants.DataBaseTypes.DB_TYPE_H2:
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return new H2EventConfigDAOImpl();
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default:
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throw new UnsupportedDatabaseEngineException("Unsupported database engine : " + databaseEngine);
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}
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}
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throw new IllegalStateException("Database engine has not initialized properly.");
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}
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public static void init(DataSourceConfig config) {
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dataSource = resolveDataSource(config);
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try {
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databaseEngine = dataSource.getConnection().getMetaData().getDatabaseProductName();
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} catch (SQLException e) {
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log.error("Error occurred while retrieving config.datasource connection", e);
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}
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}
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public static void init(DataSource dtSource) {
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dataSource = dtSource;
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try {
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databaseEngine = dataSource.getConnection().getMetaData().getDatabaseProductName();
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} catch (SQLException e) {
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log.error("Error occurred while retrieving config.datasource connection", e);
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}
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}
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public static void beginTransaction() throws TransactionManagementException {
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Connection conn = currentConnection.get();
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if (conn != null) {
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throw new IllegalTransactionStateException("A transaction is already active within the context of " +
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"this particular thread. Therefore, calling 'beginTransaction/openConnection' while another " +
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"transaction is already active is a sign of improper transaction handling");
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}
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try {
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conn = dataSource.getConnection();
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conn.setAutoCommit(false);
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currentConnection.set(conn);
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} catch (SQLException e) {
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throw new TransactionManagementException("Error occurred while retrieving config.datasource connection", e);
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}
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}
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public static void openConnection() throws SQLException {
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Connection conn = currentConnection.get();
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if (conn != null) {
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throw new IllegalTransactionStateException("A transaction is already active within the context of " +
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"this particular thread. Therefore, calling 'beginTransaction/openConnection' while another " +
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"transaction is already active is a sign of improper transaction handling");
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}
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conn = dataSource.getConnection();
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currentConnection.set(conn);
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}
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public static Connection getConnection() throws SQLException {
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Connection conn = currentConnection.get();
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if (conn == null) {
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throw new IllegalTransactionStateException("No connection is associated with the current transaction. " +
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"This might have ideally been caused by not properly initiating the transaction via " +
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"'beginTransaction'/'openConnection' methods");
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}
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return conn;
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}
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public static void commitTransaction() {
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Connection conn = currentConnection.get();
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if (conn == null) {
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throw new IllegalTransactionStateException("No connection is associated with the current transaction. " +
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"This might have ideally been caused by not properly initiating the transaction via " +
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"'beginTransaction'/'openConnection' methods");
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}
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try {
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conn.commit();
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} catch (SQLException e) {
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log.error("Error occurred while committing the transaction", e);
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}
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}
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public static void rollbackTransaction() {
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Connection conn = currentConnection.get();
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if (conn == null) {
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throw new IllegalTransactionStateException("No connection is associated with the current transaction. " +
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"This might have ideally been caused by not properly initiating the transaction via " +
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"'beginTransaction'/'openConnection' methods");
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}
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try {
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conn.rollback();
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} catch (SQLException e) {
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log.warn("Error occurred while roll-backing the transaction", e);
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}
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}
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public static void closeConnection() {
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Connection conn = currentConnection.get();
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if (conn == null) {
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throw new IllegalTransactionStateException("No connection is associated with the current transaction. " +
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"This might have ideally been caused by not properly initiating the transaction via " +
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"'beginTransaction'/'openConnection' methods");
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}
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try {
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conn.close();
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} catch (SQLException e) {
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log.warn("Error occurred while close the connection");
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}
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currentConnection.remove();
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}
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/**
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* Resolve data source from the data source definition
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*
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* @param config data source configuration
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* @return data source resolved from the data source definition
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*/
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private static DataSource resolveDataSource(DataSourceConfig config) {
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DataSource dataSource = null;
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if (config == null) {
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throw new RuntimeException(
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"Device Management Repository data source configuration " + "is null and " +
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"thus, is not initialized");
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}
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JNDILookupDefinition jndiConfig = config.getJndiLookupDefinition();
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if (jndiConfig != null) {
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if (log.isDebugEnabled()) {
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log.debug("Initializing Device Management Repository data source using the JNDI " +
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"Lookup Definition");
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}
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List<JNDILookupDefinition.JNDIProperty> jndiPropertyList =
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jndiConfig.getJndiProperties();
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if (jndiPropertyList != null) {
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Hashtable<Object, Object> jndiProperties = new Hashtable<Object, Object>();
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for (JNDILookupDefinition.JNDIProperty prop : jndiPropertyList) {
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jndiProperties.put(prop.getName(), prop.getValue());
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}
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dataSource = DeviceManagementDAOUtil.lookupDataSource(jndiConfig.getJndiName(), jndiProperties);
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} else {
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dataSource = DeviceManagementDAOUtil.lookupDataSource(jndiConfig.getJndiName(), null);
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}
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}
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return dataSource;
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}
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}
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