Java DataSource logQueryResultToFile(DataSource dataSource, String path, String sqlStatement, Object... boundVariables)

Description

log Query Result To File

License

Apache License

Declaration

public static void logQueryResultToFile(DataSource dataSource, String path, String sqlStatement,
            Object... boundVariables) 

Method Source Code

//package com.java2s;
/*/*  w  w w. j  a  va 2  s.  c o m*/
 * Copyright 2017 ThoughtWorks, Inc.
 *
 * 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.
 */

import javax.sql.DataSource;
import java.io.BufferedWriter;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;
import java.sql.*;

public class Main {
    public static void logQueryResultToFile(DataSource dataSource, String path, String sqlStatement,
            Object... boundVariables) {
        try {
            Connection connection = dataSource.getConnection();
            PreparedStatement statement = connection.prepareStatement(sqlStatement);

            bindValues(statement, boundVariables);

            writeResultSetToFile(path, statement.executeQuery());
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public static PreparedStatement bindValues(PreparedStatement statement, Object[] bindings) throws SQLException {
        int idx = 1;
        for (Object binding : bindings) {
            statement.setObject(idx, binding);
            idx++;
        }

        return statement;
    }

    public static void writeResultSetToFile(String path, ResultSet results) throws SQLException {
        ResultSetMetaData metaData = results.getMetaData();

        int columnCount = metaData.getColumnCount();

        try {
            BufferedWriter bw = Files.newBufferedWriter(Paths.get(path), StandardOpenOption.CREATE);

            bw.write("**************** SQL DEBUG ****************\n");
            bw.write("*******************************************\n");
            bw.write("*******************************************\n");
            while (results.next()) {
                StringBuilder row = new StringBuilder();
                for (int i = 1; i <= columnCount; i++) {
                    if (i > 1)
                        row.append(", ");
                    String columnValue = results.getString(i);
                    row.append(String.format("%s: %s", metaData.getColumnName(i), columnValue));
                }
                bw.write(row.toString() + "\n");
            }
            bw.write("*******************************************\n");
            bw.write("*******************************************\n");
            bw.write("*******************************************\n");
            bw.write("\n");
            bw.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Related

1. initDataSource()
2. initDatasource(String jndiName)
3. initDb(DataSource ds)
4. initializeDataSource()
5. isDataSourceAvailable(String dataSourceName)
6. lookupDataSource(String dataSourceName)
7. lookupDataSource(String dataSourceName, final Hashtable jndiProperties)
8. myDataSource(String username, String password)
9. purgeTables(DataSource ds)