/*
 * Copyright (c) 2015, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * 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.wso2.carbon.integration.test.client;


import org.apache.log4j.Logger;
import org.wso2.carbon.integration.test.client.util.BasicDataSource;

import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class H2DatabaseClient {

    private static final Logger log = Logger.getLogger(H2DatabaseClient.class);

    public static void main(String[] args) {
        getTableEntryCount("sensordata");
    }

    public static int getTableEntryCount(String tableName) {


        DataSource dataSource = new BasicDataSource();
        PreparedStatement stmt = null;
        Connection con = null;
        try {
            con = dataSource.getConnection();
            stmt = con.prepareStatement("SELECT COUNT (*) AS totalRowCount FROM " + tableName + "");
            ResultSet resultSet = stmt.executeQuery();
            if (resultSet.next()) {
                return resultSet.getInt("totalRowCount");
            }
        } catch (SQLException e) {
            log.error("Error while retrieving the table information", e);
        } finally {
            clearConnections(stmt, con);
        }

        return 0;
    }

    public static void clearConnections(PreparedStatement stmt, Connection con) {
        if (stmt != null) {
            try {
                stmt.close();
            } catch (SQLException e) {
                log.error("unable to release statement", e);
            }
        }

        if (con != null) {
            try {
                con.close();
            } catch (SQLException e) {
                log.error("unable to release connection", e);
            }
        }

    }


}
