co.cask.hydrator.plugin

Class JDBCDriverShim

java.lang.Object

co.cask.hydrator.plugin.JDBCDriverShim

All Implemented Interfaces:

Driver

public class JDBCDriverShim
extends Object
implements Driver

Shim for JDBC driver as a better alternative to mere Class.forName to load the JDBC Driver class. From http://www.kfu.com/~nsayer/Java/dyn-jdbc.html One problem with using

Class.forName()

to find and load the JDBC Driver class is that it presumes that your driver is in the classpath. This means either packaging the driver in your jar, or having to stick the driver somewhere (probably unpacking it too), or modifying your classpath. But why not use something like URLClassLoader and the overload of Class.forName() that lets you specify the ClassLoader?" Because the DriverManager will refuse to use a driver not loaded by the system ClassLoader. The workaround for this is to create a shim class that implements java.sql.Driver. This shim class will do nothing but call the methods of an instance of a JDBC driver that we loaded dynamically.

See Also:

DataDrivenETLDBInputFormat, ETLDBOutputFormat

Constructor Summary

Constructors

Constructor and Description
JDBCDriverShim(Driver delegate)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	acceptsURL(String url)
Connection	connect(String url, Properties info)
int	getMajorVersion()
int	getMinorVersion()
Logger	getParentLogger()
DriverPropertyInfo[]	getPropertyInfo(String url, Properties info)
boolean	jdbcCompliant()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JDBCDriverShim

public JDBCDriverShim(Driver delegate)

Method Detail

acceptsURL

public boolean acceptsURL(String url)
                   throws SQLException

Specified by:

acceptsURL in interface Driver

Throws:

SQLException

connect

public Connection connect(String url,
                 Properties info)
                   throws SQLException

Specified by:

connect in interface Driver

Throws:

SQLException

getMajorVersion

public int getMajorVersion()

Specified by:

getMajorVersion in interface Driver

getMinorVersion

public int getMinorVersion()

Specified by:

getMinorVersion in interface Driver

getPropertyInfo

public DriverPropertyInfo[] getPropertyInfo(String url,
                                   Properties info)
                                     throws SQLException

Specified by:

getPropertyInfo in interface Driver

Throws:

SQLException

jdbcCompliant

public boolean jdbcCompliant()

Specified by:

jdbcCompliant in interface Driver

getParentLogger

public Logger getParentLogger()
                       throws SQLFeatureNotSupportedException

Specified by:

getParentLogger in interface Driver

Throws:

SQLFeatureNotSupportedException