genepi.db.h2.H2Connector.java Source code

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Here is the source code for genepi.db.h2.H2Connector.java

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/*******************************************************************************
 * Copyright (C) 2009-2016 Lukas Forer and Sebastian Schnherr
 *  
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by 
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *  
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *  
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/

package genepi.db.h2;

import genepi.db.DatabaseConnector;
import genepi.io.FileUtil;

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URISyntaxException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

import org.apache.commons.dbcp.BasicDataSource;
import org.apache.commons.dbutils.DbUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class H2Connector implements DatabaseConnector {

    protected static final Log log = LogFactory.getLog(H2Connector.class);

    private BasicDataSource dataSource;

    private String path;
    private String user;
    private String password;
    private boolean multiuser = false;
    private boolean exists = false;

    public H2Connector(String path, String user, String password, boolean multiuser) {
        this.path = path;
        this.user = user;
        this.password = password;
        this.multiuser = multiuser;
    }

    public boolean createBackup(String folder) {

        File file = new File(path + ".h2.db");
        File file2 = new File(path + ".mv.db");

        boolean exists = file.exists() || file2.exists();

        if (exists) {

            FileUtil.copyDirectory(file.getParent(), folder);

        }

        log.info("Created backup file " + folder);

        return true;

    }

    public void connect() throws SQLException {

        File file = new File(path + ".h2.db");
        File file2 = new File(path + ".mv.db");
        exists = file.exists() || file2.exists();

        log.debug("Establishing connection to " + user + "@" + path);

        if (DbUtils.loadDriver("org.h2.Driver")) {
            try {
                dataSource = new BasicDataSource();

                dataSource.setDriverClassName("org.h2.Driver");

                String newPath = path;
                if (!path.startsWith("/")) {
                    newPath = "./" + path;
                } else {
                    newPath = path;
                }

                if (multiuser) {
                    dataSource.setUrl("jdbc:h2:" + newPath + ";AUTO_SERVER=TRUE");
                } else {
                    dataSource.setUrl("jdbc:h2:" + newPath);
                }
                dataSource.setUsername(user);
                dataSource.setPassword(password);
                // dataSource.setMaxActive(1000);
                // dataSource.setMaxWait(10000);
                dataSource.setMaxIdle(10000);
                dataSource.setDefaultAutoCommit(true);

            } catch (Exception e) {
                e.printStackTrace();
            }

        } else {
            log.error("H2 Driver Class not found");
        }

    }

    public void disconnect() throws SQLException {
        dataSource.close();

    }

    public boolean isNewDatabase() {
        return !exists;
    }

    public void executeSQL(InputStream is) throws SQLException, IOException, URISyntaxException {

        String sqlContent = readFileAsString(is);
        if (!sqlContent.isEmpty()) {
            Connection connection = dataSource.getConnection();
            PreparedStatement ps = connection.prepareStatement(sqlContent);
            ps.executeUpdate();
            connection.close();
        }
    }

    public static String readFileAsString(InputStream is) throws java.io.IOException, URISyntaxException {

        DataInputStream in = new DataInputStream(is);
        BufferedReader br = new BufferedReader(new InputStreamReader(in));
        String strLine;
        StringBuilder builder = new StringBuilder();
        while ((strLine = br.readLine()) != null) {
            builder.append("\n");
            builder.append(strLine);
        }

        in.close();

        return builder.toString();
    }

    public BasicDataSource getDataSource() {
        return dataSource;
    }
}