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package eu.dnetlib.utils.sql;
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import java.sql.Connection;
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import java.sql.DriverManager;
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/**
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* This factory class is used for retrieving a singleton JDBC connection.
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* @author thanos@di.uoa.gr
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*
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*/
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public class ConnectionFactory {
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private String driver;
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private String url;
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private Connection connection;
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/**
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* Set the driver.
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* @param driver the new JDBC driver that this factory will use
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*/
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public void setDriver(String driver) {
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this.driver = driver;
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}
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/**
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* Set the URL.
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* @param url the new URL that this factory will connect to
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*/
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public void setUrl(String url) {
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this.url = url;
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}
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/**
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* Get the connection.
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* @return the JDBC connection created by this connection factory
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*/
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public Connection getConnection() {
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return connection;
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}
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/**
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* Open JDBC connection to the specified URL using the specified JDBC driver (used for Spring initialization).
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* @throws ConnectionFactoryException if any errors occur
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*/
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public void init() throws ConnectionFactoryException {
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try {
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Class.forName(driver).newInstance();
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connection = DriverManager.getConnection(url);
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} catch (Exception e) {
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throw new ConnectionFactoryException("error connecting to " + url + " using JDBC driver " + driver, e);
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}
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}
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/**
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* Close JDBC connection (used for Spring finalization).
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* @throws ConnectionFactoryException if any errors occur
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*/
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public void destroy() throws ConnectionFactoryException {
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try {
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connection.close();
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} catch (Exception e) {
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throw new ConnectionFactoryException("error closing connection", e);
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}
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}
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}
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