gobblin.source.extractor.extract.jdbc.JdbcProvider.java Source code

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Here is the source code for gobblin.source.extractor.extract.jdbc.JdbcProvider.java

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/*
 * 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 gobblin.source.extractor.extract.jdbc;

import gobblin.tunnel.Tunnel;
import org.apache.commons.dbcp.BasicDataSource;

import java.io.IOException;
import java.sql.SQLException;

/**
 * Create JDBC data source
 *
 * @author nveeramr
 */
public class JdbcProvider extends BasicDataSource {
    private Tunnel tunnel;

    // If extract type is not provided then consider it as a default type
    public JdbcProvider(String driver, String connectionUrl, String user, String password, int numconn,
            int timeout) {
        this.connect(driver, connectionUrl, user, password, numconn, timeout, "DEFAULT", null, -1);
    }

    public JdbcProvider(String driver, String connectionUrl, String user, String password, int numconn, int timeout,
            String type) {
        this.connect(driver, connectionUrl, user, password, numconn, timeout, type, null, -1);
    }

    public JdbcProvider(String driver, String connectionUrl, String user, String password, int numconn, int timeout,
            String type, String proxyHost, int proxyPort) {
        this.connect(driver, connectionUrl, user, password, numconn, timeout, type, proxyHost, proxyPort);
    }

    public void connect(String driver, String connectionUrl, String user, String password, int numconn, int timeout,
            String type, String proxyHost, int proxyPort) {

        if (proxyHost != null && proxyPort > 0) {
            String remoteHost = "";
            int remotePort = 0;
            // TODO make connection Url parsing much more robust -- some connections URLs can have colons and slashes in the
            // weirdest places
            int hostStart = connectionUrl.indexOf("://") + 3;
            int portStart = connectionUrl.indexOf(":", hostStart);
            remoteHost = connectionUrl.substring(hostStart, portStart);
            remotePort = Integer
                    .decode(connectionUrl.substring(portStart + 1, connectionUrl.indexOf("/", portStart)));

            try {
                this.tunnel = Tunnel.build(remoteHost, remotePort, proxyHost, proxyPort);
                int tunnelPort = this.tunnel.getPort();
                //mangle connectionUrl, replace hostname with localhost -- hopefully the hostname is not needed!!!
                String newConnectionUrl = connectionUrl.replaceFirst(remoteHost, "127.0.0.1")
                        .replaceFirst(":" + remotePort, ":" + tunnelPort);
                connectionUrl = newConnectionUrl;
            } catch (IOException ioe) {
                throw new IllegalStateException("Failed to open tunnel to remote host " + remoteHost + ":"
                        + remotePort + " via proxy " + proxyHost + ":" + proxyPort, ioe);
            }
        }

        this.setDriverClassName(driver);
        this.setUsername(user);
        this.setPassword(password);
        this.setUrl(connectionUrl);
        this.setInitialSize(0);
        this.setMaxIdle(numconn);
        this.setMaxWait(timeout);
    }

    @Override
    public synchronized void close() throws SQLException {
        super.close();
        if (this.tunnel != null) {
            this.tunnel.close();
        }
    }
}