/*
* Copyright (c) 2014, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* WSO2 Inc. licenses this file to you 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.wso2.carbon.policy.mgt.core.dao;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.wso2.carbon.device.mgt.core.operation.mgt.dao.OperationManagementDAOException;
import org.wso2.carbon.policy.mgt.core.config.datasource.DataSourceConfig;
import org.wso2.carbon.policy.mgt.core.config.datasource.JNDILookupDefinition;
import org.wso2.carbon.policy.mgt.core.dao.impl.FeatureDAOImpl;
import org.wso2.carbon.policy.mgt.core.dao.impl.PolicyDAOImpl;
import org.wso2.carbon.policy.mgt.core.dao.impl.ProfileDAOImpl;
import org.wso2.carbon.policy.mgt.core.dao.util.PolicyManagementDAOUtil;
import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Hashtable;
import java.util.List;
public class PolicyManagementDAOFactory {
private static DataSource dataSource;
private static final Log log = LogFactory.getLog(PolicyManagementDAOFactory.class);
private static ThreadLocal<Connection> currentConnection = new ThreadLocal<Connection>();
public static void init(DataSourceConfig config) {
dataSource = resolveDataSource(config);
}
public static void init(DataSource dtSource) {
dataSource = dtSource;
}
public static DataSource getDataSource() {
if (dataSource != null) {
return dataSource;
}
throw new RuntimeException("Data source is not yet configured.");
}
public static PolicyDAO getPolicyDAO() {
return new PolicyDAOImpl();
}
public static ProfileDAO getProfileDAO() {
return new ProfileDAOImpl();
}
public static FeatureDAO getFeatureDAO() {
return new FeatureDAOImpl();
}
/**
* Resolve data source from the data source definition
*
* @param config data source configuration
* @return data source resolved from the data source definition
*/
private static DataSource resolveDataSource(DataSourceConfig config) {
DataSource dataSource = null;
if (config == null) {
throw new RuntimeException("Device Management Repository data source configuration " +
"is null and thus, is not initialized");
}
JNDILookupDefinition jndiConfig = config.getJndiLookupDefinition();
if (jndiConfig != null) {
if (log.isDebugEnabled()) {
log.debug("Initializing Device Management Repository data source using the JNDI " +
"Lookup Definition");
}
List<JNDILookupDefinition.JNDIProperty> jndiPropertyList =
jndiConfig.getJndiProperties();
if (jndiPropertyList != null) {
Hashtable<Object, Object> jndiProperties = new Hashtable<Object, Object>();
for (JNDILookupDefinition.JNDIProperty prop : jndiPropertyList) {
jndiProperties.put(prop.getName(), prop.getValue());
}
dataSource =
PolicyManagementDAOUtil.lookupDataSource(jndiConfig.getJndiName(), jndiProperties);
} else {
dataSource = PolicyManagementDAOUtil.lookupDataSource(jndiConfig.getJndiName(), null);
}
}
return dataSource;
}
public static void beginTransaction() throws PolicyManagerDAOException {
try {
Connection conn = dataSource.getConnection();
conn.setAutoCommit(false);
currentConnection.set(conn);
} catch (SQLException e) {
throw new PolicyManagerDAOException("Error occurred while retrieving datasource connection", e);
}
}
public static Connection getConnection() throws PolicyManagerDAOException {
if (currentConnection.get() == null) {
try {
Connection conn = dataSource.getConnection();
conn.setAutoCommit(false);
currentConnection.set(conn);
} catch (SQLException e) {
throw new PolicyManagerDAOException("Error occurred while retrieving data source connection",
e);
}
}
return currentConnection.get();
}
public static void closeConnection() throws PolicyManagerDAOException {
Connection con = currentConnection.get();
try {
con.close();
} catch (SQLException e) {
log.error("Error occurred while close the connection");
}
currentConnection.remove();
}
public static void commitTransaction() throws PolicyManagerDAOException {
try {
Connection conn = currentConnection.get();
if (conn != null) {
conn.commit();
} else {
if (log.isDebugEnabled()) {
log.debug("Datasource connection associated with the current thread is null, hence commit " +
"has not been attempted");
}
}
} catch (SQLException e) {
throw new PolicyManagerDAOException("Error occurred while committing the transaction", e);
} finally {
closeConnection();
}
}
public static void rollbackTransaction() throws PolicyManagerDAOException {
try {
Connection conn = currentConnection.get();
if (conn != null) {
conn.rollback();
} else {
if (log.isDebugEnabled()) {
log.debug("Datasource connection associated with the current thread is null, hence rollback " +
"has not been attempted");
}
}
} catch (SQLException e) {
throw new PolicyManagerDAOException("Error occurred while rollbacking the transaction", e);
} finally {
closeConnection();
}
}
}