org.logicalcobwebs.proxool
Class VirtoolDriver

java.lang.Object
  org.logicalcobwebs.proxool.VirtoolDriver

All Implemented Interfaces:

java.sql.Driver

public class VirtoolDriver
extends java.lang.Object
implements java.sql.Driver

This class acts as a virtual pool. When you ask it for a connection it delegates to one of the designated real pools. Some assumptions: Getting a connection needs to be very fast. Switching pools can be relatively slow (but just to get that in perspective, > 100ms) We should detect pools that don't respond (timeout), throw certain SQLExceptions, or are unacceptably slow. We should also allow simple load balancing between pools that are up.

Since:

Proxool 0.5

Version:

$Revision: 1.2 $, $Date: 2003/03/03 11:12:02 $

Author:

Bill Horsman (bill@logicalcobwebs.co.uk), $Author: billhorsman $ (current maintainer)

Field Summary

private java.lang.String[]	activePools
private int	nextPool
private static java.lang.String	VIRTOOL

Constructor Summary

VirtoolDriver()

Method Summary

boolean	acceptsURL(java.lang.String url)
java.sql.Connection	connect(java.lang.String url, java.util.Properties info)
int	getMajorVersion()
int	getMinorVersion()
java.sql.DriverPropertyInfo[]	getPropertyInfo(java.lang.String url, java.util.Properties info)
boolean	jdbcCompliant()

Methods inherited from class java.lang.Object

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

Field Detail

VIRTOOL

private static final java.lang.String VIRTOOL

See Also:

Constant Field Values

activePools

private java.lang.String[] activePools

nextPool

private int nextPool

Constructor Detail

VirtoolDriver

public VirtoolDriver()

Method Detail

connect

public java.sql.Connection connect(java.lang.String url,
                                   java.util.Properties info)
                            throws java.sql.SQLException

Specified by:

connect in interface java.sql.Driver

Throws:

java.sql.SQLException

acceptsURL

public boolean acceptsURL(java.lang.String url)
                   throws java.sql.SQLException

Specified by:

acceptsURL in interface java.sql.Driver

Throws:

java.sql.SQLException

getPropertyInfo

public java.sql.DriverPropertyInfo[] getPropertyInfo(java.lang.String url,
                                                     java.util.Properties info)
                                              throws java.sql.SQLException

Specified by:

getPropertyInfo in interface java.sql.Driver

Throws:

java.sql.SQLException

getMajorVersion

public int getMajorVersion()

Specified by:

getMajorVersion in interface java.sql.Driver

getMinorVersion

public int getMinorVersion()

Specified by:

getMinorVersion in interface java.sql.Driver

jdbcCompliant

public boolean jdbcCompliant()

Specified by:

jdbcCompliant in interface java.sql.Driver