/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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 cn.escheduler.common.job.db;

import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

/**
 * data source of ClickHouse
 */
public class ClickHouseDataSource extends BaseDataSource {
    private static final Logger logger = LoggerFactory.getLogger(ClickHouseDataSource.class);

    /**
     * gets the JDBC url for the data source connection
     * @return
     */
    @Override
    public String getJdbcUrl() {
        String jdbcUrl = getAddress();
        if (jdbcUrl.lastIndexOf("/") != (jdbcUrl.length() - 1)) {
            jdbcUrl += "/";
        }

        jdbcUrl += getDatabase();

        if (StringUtils.isNotEmpty(getOther())) {
            jdbcUrl += "?" + getOther();
        }

        return jdbcUrl;
    }

    /**
     * test whether the data source can be connected successfully
     * @throws Exception
     */
    @Override
    public void isConnectable() throws Exception {
        Connection con = null;
        try {
            Class.forName("ru.yandex.clickhouse.ClickHouseDriver");
            con = DriverManager.getConnection(getJdbcUrl(), getUser(), getPassword());
        } finally {
            if (con != null) {
                try {
                    con.close();
                } catch (SQLException e) {
                    logger.error("ClickHouse datasource try conn close conn error", e);
                    throw e;
                }
            }
        }

    }
}