biz.chitec.quarterback.util
Class DBWakeupToggler

java.lang.Object
  biz.chitec.quarterback.util.DBWakeupToggler

public final class DBWakeupToggler

extends java.lang.Object

Sends from time to time request to database connections to prevent them from being closed. Used by its statis methods attach() and remove(). Keeps some Threads internally but generally takes great care not to use too much resources.

Version:

$Id: 5416a076a670f30099c9c515254923783e392dbc $

Author:

Dirk Hillbrecht 1997-1999, chitec/Dirk Hillbrecht 2000,2002. Distributed under the terms of the GNU LGPL.

Nested Class Summary

private static class

DBWakeupToggler.ListContent Content of the internal connection list.

Field Summary

private java.util.List	connections
private static java.util.Map	conntotoggler
private static int	counter
static long	DEFAULTIDLETIME Default idle time is seven hours, which is exactly one hour less than MySQL's close time
static java.lang.String	DEFAULTQUERY This useless query works for MySQL.
private java.lang.Thread	handleThread
private java.util.List	newconnections
private long	nextruntime
private java.util.List	removeconnections
private long	sleeprest
private long	sleeptime
private static java.util.Map	togglers

Constructor Summary

private	DBWakeupToggler()
private	DBWakeupToggler(long idletimex)

Method Summary

static void	attach(java.sql.Connection conn) Attach a connection to the wakeup toggler.
static void	attach(java.sql.Connection conn, long idletime) Attach a connection to the wakeup toggler.
static void	attach(java.sql.Connection conn, long idletime, java.lang.String querystringx, java.lang.String name) Attach a connection to the wakeup toggler.
private void	attach(java.sql.Connection conn, java.lang.String querystringx, java.lang.String name)
private void	doRemove(java.sql.Connection conn)
static void	remove(java.sql.Connection conn) Remove a connection from the wakeup toggler.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULTIDLETIME

public static final long DEFAULTIDLETIME

Default idle time is seven hours, which is exactly one hour less than MySQL's close time

See Also:

Constant Field Values

DEFAULTQUERY

public static final java.lang.String DEFAULTQUERY

This useless query works for MySQL.

See Also:

Constant Field Values

handleThread

private java.lang.Thread handleThread

sleeptime

private long sleeptime

sleeprest

private long sleeprest

nextruntime

private long nextruntime

connections

private java.util.List connections

newconnections

private java.util.List newconnections

removeconnections

private java.util.List removeconnections

togglers

private static java.util.Map togglers

conntotoggler

private static java.util.Map conntotoggler

counter

private static int counter

Constructor Detail

DBWakeupToggler

private DBWakeupToggler(long idletimex)

DBWakeupToggler

private DBWakeupToggler()

Method Detail

attach

private void attach(java.sql.Connection conn,
                    java.lang.String querystringx,
                    java.lang.String name)

doRemove

private void doRemove(java.sql.Connection conn)

attach

public static void attach(java.sql.Connection conn,
                          long idletime,
                          java.lang.String querystringx,
                          java.lang.String name)

Attach a connection to the wakeup toggler.

attach

public static void attach(java.sql.Connection conn,
                          long idletime)

Attach a connection to the wakeup toggler.

attach

public static void attach(java.sql.Connection conn)

Attach a connection to the wakeup toggler.

remove

public static void remove(java.sql.Connection conn)

Remove a connection from the wakeup toggler.